air emission permit no. 07500003-010 is issued to cliffs

TABLE A: LIMITS AND OTHER REQUIREMENTSNorthshore Mining - Silver Bay

07500003 - 010

Facility Name:

Permit Number:

02/05/15A-1

Table A contains limits and other requirements with which your facility must comply. The limits are located in the first column ofthe table (What To do). The limits can be emission limits or operational limits. This column also contains the actions that you musttake and the records you must keep to show that you are complying with the limits. The second column of Table A (Why to do it)lists the regulatory basis for these limits. Appendices included as conditions of your permit are listed in Table A under total facilityrequirements.

Subject Item: Total Facility

What to do Why to do it

SOURCE-SPECIFIC REQUIREMENTS hdr

The Permittee is authorized to operate EU643, EU644, EU645, EU646, FS013f,and FS016h within 18 months after permit issuance of Permit No. 07500003-010.The units shall meet all the requirements of this permit.

Minn. R. 7007.0800, subp. 2

Permit Appendices: This permit contains appendices as listed in the permit Table ofContents. The Permittee shall comply with all requirements contained in theAppendices.

Modeling parameters in Appendix E: Modeling Information are included forreference only as described elsewhere in Table A.

Minn. R. 7007.0800, subp. 2

The deadline for the Permittee to comply with the applicable requirements of Minn.R. 7007.0502 is December 30, 2018. The Permittee shall submit a MercuryReduction Plan by December 30, 2018, for approval and inclusion in a permit orother enforceable document. The units listed in GP001 and GP014 are subject tothis requirement.

Minn. R. 7007.0502

Comply with the Fugitive Control Plan for the Silver Bay Facility: Follow the actionsand recordkeeping specified in the plan. The plan may be amended with theCommissioner's approval. If the Commissioner determines the Permittee is out ofcompliance with Minn. R. 7011.0150, or the fugitive control plan, then the Permitteemay be required to amend the fugitive control plan. Note that the required fugitivedust control actions during Mile Post 7 tailings basin area operations, found inAppendix B of this permit, are a special set of requirements for this permit, which isexcluded from the fugitive control plan for the Silver Bay Facility.

Minn. Stat. Section 116.07, subd. 4a; Minn. R.7007.0100; Minn. R. 7007.0800, subp. 2; Minn. R.7011.0150; Minn. R. 7009.0020

EIS Required. The Permittee is prohibited from initiating construction of anyproposed commercial scale ITmk3 plant at the Silver Bay facility and the PeterMitchell mine until an Environmental Impact Statement (EIS) under Minn. R.chapter 4410 has been prepared for the proposed commercial scale ITmk3 plant,the EIS process under Minn. R. chapter 4410 has been completed and anyapplicable regulatory permitting process has been completed in regard toconstruction initiation.

Minn. R. ch. 4410

The parameters used in modeling for permit number 07500003-003 are listed inAppendix E of this permit. The parameters describe the operation of the facility atmaximum permitted capacity.

For any changes that affect any modeled parameter or emission rate documentedin Appendix E, or are an addition to information documented in Appendix E, aRemodeling Submittal requirement is triggered. This includes changes that do notrequire a permit amendment as well as changes that require any type of permitamendment.

Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000; Minn. Stat. Section 116.07, subds. 4a & 9;Minn. R. 7007.0100, subp. 7(A), 7(L), & 7(M); Minn. R.7007.0800, subps. 1, 2 & 4; Minn. R.7009.0010-7009.0080

The parameters used in CO modeling for permit number 07500003-009 are listed inAppendix G of this permit. The parameters describe the operation of the facility atmaximum permitted capacity. The purpose of listing the parameters in the appendixis to provide a benchmark for future changes.

Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000

Remodeling Submittal: The Permittee must submit to the MPCA for approval anyrevisions of these parameters and must wait for a written approval before makingsuch changes (see introduction for Table B of this permit for MPCA mailinginformation). For changes that don't require a moderate or major amendment,written approval of the modeling may be given before permit issuance; however,the approval applies only to the modeling and not to any other changes. Theinformation submitted must include, for stack and vent sources, source emissionrate, location, height, diameters, exit velocity, exit temperature, discharge direction,use of rain caps or rain hats, and, if applicable, locations and dimensions of nearbybuildings. For non-stack/vent sources, this includes the source emission rate,location, size and shape, release height, and, if applicable, any emission ratescalars, and the initial lateral dimensions and initial vertical dimensions andadjacent building heights.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-2

The plume dispersion characteristics due to the revisions of the information mustbe equivalent to or better than the dispersion characteristics modeled in the mostrecent air quality impacts analysis. The Permittee shall demonstrate thisequivalency in the proposal. If the information does not demonstrate equivalent orbetter dispersion characteristics, or if a conclusion cannot readily be made aboutthe dispersion, the Permittee must submit full remodeling.

For changes that do not require a permit amendment or require a minor permitamendment, the proposal must be submitted as soon as practicable, but no lessthan 60 days before beginning actual construction on the stack or associatedemission unit.

For changes that require a permit amendment other than a minor amendment,the proposal must be submitted with the permit application.


For any future re-modeling (or new modeling) subject to 40 CFR Section 52.21(Prevention of Significant Deterioration, PSD) or Minn. R. ch. 7009 (MinnesotaAmbient Air Quality Standards), the Permittee shall follow all applicable rules orregulations.

Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000; Minn. Stat. Section 116.07, subds. 4a & 9;Minn. R. 7009.0020; Minn. R. 7011.0150; Minn. R.7007.0100; Minn. R. 7007.0800, subps. 2 & 4

Comply with Subpart RRRRR - National Emission Standards for Hazardous AirPollutants: Taconite Iron Ore Processing:a. For an existing affected source, comply with each emission limitation, work practice standard, and operation and maintenance requirement that applies to the source no later than October 30, 2006;b. For a new affected source with an initial startup date on or before October 30, 2003, comply with each emission limitation, work practice standard, and O&M requirement that applies to the source by October 30, 2003;c. For a new affected source with an initial startup date after October 30, 2003, comply with each emission limitation, work practice standard, and O&M requirement that applies to the source upon initial startup.Also comply with applicable requirements of 40 CFR 63, General Provisions.

40 CFR 63.9580 to 63.9652; Tables to SubpartRRRRR of 40 CFR 63; 40 CFR 63, subp. A; Minn. R.7011.7000

Comply with Subpart DDDDD - National Emission Standards for Hazardous AirPollutants: Industrial, Commercial, and Institutional Boilers and Process Heaters:a. Submit an Initial Notification not later than May 31, 2013 or within 120 calendar days after a boiler or process heater becomes subject to Subpart DDDDD, whichever is later.b. For an existing affected source, comply with applicable requirements no later than, January 31, 2016;c. For a new affected source with an initial startup date on or before January 31,2016, comply with applicable requirements by January 31, 2016;d. For a new affected source with an initial startup date after January 31, 2016, comply with requirements upon initial startup.Also comply with applicable requirements of 40 CFR 63, General Provisions.

40 CFR 63.7480 to 63.7585; Tables to SubpartDDDDD of 40 CFR 63; 40 CFR 63, subp. A; Minn. R.7011.7000

With respect to fibers, the air quality standards at or beyond the property line of theSilver Bay facility to which the Permittee shall adhere, consistent with thedetermination of the Minnesota Supreme Court, are:

a. Fibers in the ambient air shall be below a medically significant level;b. The ambient air shall contain no more fibers than that level ordinarily found in the ambient air of a control city such as St. Paul;c. The fibers in the ambient air shall be maintained below a level which is injurious to human health or welfare in violation of Minn. Stat. Sec. 116.06 (3); andd. Such other standards which now or in the future may be applied to the Permittee's fiber emissions.

The MPCA recognizes that the above fiber level standards or measurementsapplicable to fiber emissions emanating from the Permittee's operations are to bedetermined in the future to a degree which approaches reliable scientific andmedical precision.

Minn. R. 7007.0800, subp. 2

The control city standard set forth in paragraph (b) was found by the federal courtsto be based on a reasonable medical theory. Any future fiber level standardsapplied pursuant to paragraphs (a), (c) and (d) must likewise be based on areasonable medical theory.

"Fibers," for the purpose of this permit, are defined as chrysotile and amphibolemineral particles with 3-to-1 or greater aspect ratios.

Minn. R. 7007.0800, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-3

Daily Visible Emission Checklists for the O&M Plan: All stacks equipped with drycontrol equipment must appear individually in at least one of the Daily VisibleEmission Checklists. Observations and observation dates, weather conditioncodes, whether and what corrective action(s) had been taken, and observer's IDmust be included in the checklists. Appendix C provides explanations for thechecklists and an example checklist.

Note that fabric filters (baghouses) that are equipped with MPCA-approved brokenbag detectors are not subject to daily visible emission inspection.

Minn. R. 7007.0800, subps. 4(D), 14, & 16(J)

Check visible emissions from GP 003 through GP 013, SV 005, SV 043, and SV097 once daily when in operation during daylight hours. Use the daily visibleemission checklists in the O&M Plan (see Appendix C for detail) as a means toindicate when appropriate corrective actions in the O&M Plan should be taken.

Minn. R. 7007.0800, subps. 4(D), 14, & 16(J)

Daily Visible Emission Checklists for the Fugitive Control Plan at the Silver BayFacility: FS 001 through FS 017 and FS 019 must appear individually in at leastone of the Daily Visible Emission Checklists. Observations and observation dates,weather condition codes, whether and what corrective action(s) had been taken,and observer's ID must be included in the checklists. Appendix C providesexplanations for the checklists.

Minn. R. 7007.0800, subps. 4(D), 14, & 16(J)

Observe fugitive dust sources FS 001 through FS 017 and FS 019 once dailyduring daylight hours. Use the daily visible emission checklist(s) in the fugitive dustcontrol plan (see Appendix C for detail) as a means to indicate when appropriatecorrective actions in the fugitive control plan are taken.

Minn. R. 7007.0800, subps. 4(D), 14, & 16(J)

Visible Emissions Training: The Permittee shall (1) ensure that one plant employeeobtains an initial EPA Method 9 certification and be recertified every three years or(2) employ a similarly certified contractor. This person will train other plantemployees to perform the daily visible emission check as detailed in the O&M Planand Fugitive Control Plan.

Minn. R. 7007.0800, subps. 4(D), 14, & 16(J)

Ambient Air Quality Monitoring: The Permittee shall continue to operate TSP andPM-10 ambient air quality monitors at the existing sites, in accordance with theMPCA approved ambient monitoring plans and MPCA Exhibit M. The Permitteeshall continue to operate fiber ambient air monitors at Stations 1 (Beaver Bay) and7 (Silver Bay) at a monitoring frequency of one sample per 21 days, while meetingother requirements in the existing, MPCA approved ambient monitoring plans andMPCA Exhibit M.

Minn. R. 7007.0800, subps. 4(D) & 16(J)

DETERMINING IF A PROJECT/MODIFICATION IS SUBJECT TO NSR hdr

Reasonable Possibility - Pellet Handling Modification. The Pellet HandlingModification triggers the monitoring, recordkeeping and reporting requirements asdefined in 40 CFR Section 52.21(r)(6) and detailed below. This requirement effectsEUs 007-010, 012-19, 021-031, 036-042, 044-053, 097, 100, 104, 110, 114,120-125, 262, 265, 634-636, and 643-646, and FSs: 010a, 011a-b, 012a, 013a-f,014, 015, 016a-l, and 017.

The following language may also apply to other changes at the facility where theremay be a reasonable possibility that a significant emissions increase may occur.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.0800, subp. 2

These requirements apply if a reasonable possibility (RP) as defined in 40 CFRSection 52.21(r)(6)(vi) exists that a proposed project, analyzed using theactual-to-projected-actual (ATPA) test (either by itself or as part of the hybrid test atSection 52.21(a)(2)(iv)(f)) and found to not be part of a major modification, mayresult in a significant emissions increase (SEI). If the ATPA test is not used for theproject, or if there is no RP that the proposed project could result in a SEI, theserequirements do not apply to that project. The Permittee is only subject to thePreconstruction Documentation requirement for a project where a RP occurs onlywithin the meaning of Section 52.21(r)(6)(vi)(b).

Even though a particular modification is not subject to New Source Review (NSR),or where there isn't a RP that a proposed project could result in a SEI, a permitamendment, recordkeeping, or notification may still be required by Minn. R.7007.1150 - 7007.1500.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-4

Preconstruction Documentation -- Before beginning actual construction on aproject, the Permittee shall document the following:

1. Project description2. Identification of any emission unit (EU) whose emissions of an NSR pollutantcould be affected3. Pre-change potential emissions of any affected existing EU, and the projectedpost-change potential emissions of any affected existing or new EU.4. A description of the applicability test used to determine that the project is not amajor modification for any regulated NSR pollutant, including the baseline actualemissions, the projected actual emissions, the amount of emissions excluded dueto increases not associated with the modification and that the EU could haveaccommodated during the baseline period, an explanation of why the amountswere excluded, and any creditable contemporaneous increases and decreases thatwere considered in the determination.

The Permittee shall maintain records of this documentation.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.1200, subp. 4; Minn. R.7007.0800, subps. 4 & 5

The Permittee shall monitor the actual emissions of any regulated NSR pollutantthat could increase as a result of the project and that were analyzed using theATPA test, and the potential emissions of any regulated NSR pollutant that couldincrease as a result of the project and that were analyzed using potential emissionsin the hybrid test. The Permittee shall calculate and maintain a record of the sum ofthe actual and potential (if the hybrid test was used in the analysis) emissions of theregulated pollutant, in tons per year on a calendar year basis, for a period of 5years following resumption of regular operations after the change, or for a period of10 years following resumption of regular operations after the change if the projectincreases the design capacity of or potential to emit of any unit associated with theproject.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.0800, subps. 4 & 5

The Permittee must submit a report to the Agency if the annual summed (actual,plus potential if used in hybrid test) emissions differ from the preconstructionprojection and exceed the baseline actual emissions by a significant amount aslisted at 40 CFR Section 52.21(b)(23). Such report shall be submitted to theAgency within 60 days after the end of the year in which the exceedances occur.The report shall contain:

a. The name and ID number of the facility, and the name and telephone number ofthe facility contact personb. The annual emissions (actual, plus potential if any part of the project wasanalyzed using the hybrid test) for each pollutant for which the preconstructionprojection and significant emissions increase are exceeded.c. Any other information, such as an explanation as to why the summed emissionsdiffer from the preconstruction projection.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.0800, subps. 4 & 5

OPERATIONAL REQUIREMENTS hdr

The Permittee shall comply with National Primary and Secondary Ambient AirQuality Standards, 40 CFR pt. 50, and the Minnesota Ambient Air QualityStandards, Minn. R. 7009.0010 to 7009.0080. Compliance shall be demonstratedupon written request by the MPCA.

Minn. Stat. Section 116.07, subds. 4a & 9; Minn. R.7007.0100, subp. 7(A), 7(L), & 7(M); Minn. R.7007.0800, subps. 1, 2 & 4; Minn. R.7009.0010-7009.0080

Circumvention: Do not install or use a device or means that conceals or dilutesemissions, which would otherwise violate a federal or state air pollution control rule,without reducing the total amount of pollutant emitted.

Minn. R. 7011.0020

Air Pollution Control Equipment: Operate all pollution control equipment wheneverthe corresponding process equipment and emission units are operated.

Minn. R. 7007.0800, subp. 2; Minn. R. 7007.0800,subp. 16(J)

Operation and Maintenance Plan: Retain at the stationary source an operation andmaintenance plan for all air pollution control equipment. At a minimum, the O & Mplan shall identify all air pollution control equipment and control practices and shallinclude a preventative maintenance program for the equipment and practices, adescription of (the minimum but not necessarily the only) corrective actions to betaken to restore the equipment and practices to proper operation to meet applicablepermit conditions, a description of the employee training program for properoperation and maintenance of the control equipment and practices, and the recordskept to demonstrate plan implementation.

Minn. R. 7007.0800 subps. 14 and 16(J)

Operation Changes: In any shutdown, breakdown, or deviation the Permittee shallimmediately take all practical steps to modify operations to reduce the emission ofany regulated air pollutant. The Commissioner may require feasible and practicalmodifications in the operation to reduce emissions of air pollutants. No emissionsunits that have an unreasonable shutdown or breakdown frequency of process orcontrol equipment shall be permitted to operate.

Minn. R. 7019.1000, subp. 4


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-5

Fugitive Emissions: Do not cause or permit the handling, use, transporting, orstorage of any material in a manner which may allow avoidable amounts ofparticulate matter to become airborne. Comply with all other requirements listed inMinn. R. 7011.0150.

Minn. R. 7011.0150

Noise: The Permittee shall comply with the noise standards set forth in Minn. R.7030.0010 to 7030.0080 at all times during the operation of any emission units.This is a state only requirement and is not enforceable by the EPA Administrator orcitizens under the Clean Air Act.

Minn. R. 7030.0010 - 7030.0080

Inspections: The Permittee shall comply with the inspection procedures andrequirements as found in Minn. R. 7007.0800, subp. 9(A).

Minn. R. 7007.0800, subp. 9(A)

The Permittee shall comply with the General Conditions listed in Minn. R.7007.0800, subp. 16.

Minn. R. 7007.0800, subp. 16

PERFORMANCE TESTING hdr

Performance Testing: Conduct all performance tests in accordance with Minn. R.ch. 7017 unless otherwise noted in Tables A, B, and/or C.

Minn. R. ch. 7017

Performance Test Notifications and Submittals:

Performance Tests are due as outlined in Table A of the permit.See Table B for additional testing requirements.

Performance Test Notification (written): due 30 days before each Performance TestPerformance Test Plan: due 30 days before each Performance TestPerformance Test Pre-test Meeting: due 7 days before each Performance TestPerformance Test Report: due 45 days after each Performance TestPerformance Test Report - Microfiche Copy: due 105 days after each PerformanceTest

The Notification, Test Plan, and Test Report may be submitted in an alternativeformat as allowed by Minn. R. 7017.2018.

Minn. R. 7017.2018; Minn. R. 7017.2030, subps. 1-4,Minn. R. 7017.2035, subps. 1-2

Limits set as a result of a performance test (conducted before or after permitissuance) apply until superseded as stated in the MPCA's Notice of Complianceletter granting preliminary approval. Preliminary approval is based on formal reviewof a subsequent performance test on the same unit as specified by Minn. R.7017.2025, subp. 3. The limit is final upon issuance of a permit amendmentincorporating the change.

Minn. R. 7017.2025, subp. 3

MONITORING REQUIREMENTS hdr

Monitoring Equipment Calibration - The Permittee shall either:

1. Calibrate or replace required monitoring equipment every 12 months; or2. Calibrate at the frequency stated in the manufacturer's specifications.

For each monitor, the Permittee shall maintain a record of all calibrations, includingthe date conducted, and any corrective action that resulted. The Permittee shallinclude the calibration frequencies, procedures, and manufacturer's specifications(if applicable) in the Operations and Maintenance Plan. Any requirements applyingto continuous emission monitors are listed separately in this permit.

Minn. R. 7007.0800, subp. 4(D)

Operation of Monitoring Equipment: Unless otherwise noted in Tables A, B, and/orC, monitoring a process or control equipment connected to that process is notnecessary during periods when the process is shutdown, or during checks of themonitoring systems, such as calibration checks and zero and span adjustments. Ifmonitoring records are required, they should reflect any such periods of processshutdown or checks of the monitoring system.

Minn. R. 7007.0800, subp. 4(D)

RECORDKEEPING REQUIREMENTS hdr

Recordkeeping: Retain all records at the stationary source, unless otherwisespecified within this permit, for a period of five (5) years from the date of monitoring,sample, measurement, or report. Records which must be retained at this locationinclude all calibration and maintenance records, all original recordings forcontinuous monitoring instrumentation, and copies of all reports required by thepermit. Records must conform to the requirements listed in Minn. R. 7007.0800,subp. 5(A).

Minn. R. 7007.0800, subp. 5(C)

Recordkeeping: Maintain records describing any insignificant modifications (asrequired by Minn. R. 7007.1250, subp. 3) or changes contravening permit terms (asrequired by Minn. R. 7007.1350, subp. 2), including records of the emissionsresulting from those changes.

Minn. R. 7007.0800, subp. 5(B)


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-6

If the Permittee determines that no permit amendment or notification is requiredprior to making a change, the Permittee must retain records of all calculationsrequired under Minn. R. 7007.1200. For expiring permits, these records shall bekept for a period of five years from the date the change was made or until permitreissuance, whichever is longer. The records shall be kept at the stationary sourcefor the current calendar year of operation and may be kept at the stationary sourceor office of the stationary source for all other years. The records may be maintainedin either electronic or paper format.

Minn. R. 7007.1200, subp. 4

CONTRACTORS hdr

Contractors: The Permittee shall retain records on site of all contractors allowed onsite that include any crushers, screens and conveyors. The Permittee shall alsoretain records on site of all contractors whose operations would require an AirEmission Permit from the MPCA. The records shall include the contractor'scompany name, MPCA air emissions permit number, short description of activitiesundertaken by the contractor, estimate of emissions or materials handled and thedates the contractor was on site. The record shall be updated at least monthly.

The Permittee shall evaluate if the activities of any contractor required NSRpermitting prior to the contractor performing such activities. If a contractor has itsown permit, but it is determined that the contractor is under the common control ofthe taconite plant then the contractor's permit does not shield the taconite plant orthe contractor from the NSR & Part 70 modification regulations or enforcementactions.

Minn. R. 7007.0800, subps. 2, 4 and 5

REPORTING/SUBMITTALS hdr

Shutdown Notifications: Notify the Commissioner at least 24 hours in advance of aplanned shutdown of any control equipment or process equipment if the shutdownwould cause any increase in the emissions of any regulated air pollutant. If theowner or operator does not have advance knowledge of the shutdown, notificationshall be made to the Commissioner as soon as possible after the shutdown.However, notification is not required in the circumstances outlined in Items A, Band C of Minn. R. 7019.1000, subp. 3.

At the time of notification, the owner or operator shall inform the Commissioner ofthe cause of the shutdown and the estimated duration. The owner or operator shallnotify the Commissioner when the shutdown is over.

Minn. R. 7019.1000, subp. 3

Breakdown Notifications: Notify the Commissioner within 24 hours of a breakdownof more than one hour duration of any control equipment or process equipment ifthe breakdown causes any increase in the emissions of any regulated air pollutant.The 24-hour time period starts when the breakdown was discovered or reasonablyshould have been discovered by the owner or operator. However, notification is notrequired in the circumstances outlined in Items A, B and C of Minn. R. 7019.1000,subp. 2.

At the time of notification or as soon as possible thereafter, the owner or operatorshall inform the Commissioner of the cause of the breakdown and the estimatedduration. The owner or operator shall notify the Commissioner when the breakdownis over.

Minn. R. 7019.1000, subp. 2

Notification of Deviations Endangering Human Health or the Environment: As soonas possible after discovery, notify the Commissioner or the state duty officer, eitherorally or by facsimile, of any deviation from permit conditions which could endangerhuman health or the environment.

Minn. R. 7019.1000, subp. 1

Notification of Deviations Endangering Human Health or the Environment Report:Within 2 working days of discovery, notify the Commissioner in writing of anydeviation from permit conditions which could endanger human health or theenvironment. Include the following information in this written description:1. the cause of the deviation;2. the exact dates of the period of the deviation, if the deviation has been corrected;3. whether or not the deviation has been corrected;4. the anticipated time by which the deviation is expected to be corrected, if not yetcorrected; and5. steps taken or planned to reduce, eliminate, and prevent reoccurrence of thedeviation.

Minn. R. 7019.1000, subp. 1

Application for Permit Amendment: If a permit amendment is needed, submit anapplication in accordance with the requirements of Minn. R. 7007.1150 throughMinn. R. 7007.1500. Submittal dates vary, depending on the type of amendmentneeded.

Minn. R. 7007.1150 - 7007.1500


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-7

Extension Requests: The Permittee may apply for an Administrative Amendment toextend a deadline in a permit by no more than 120 days, provided the proposeddeadline extension meets the requirements of Minn. R. 7007.1400, subp. 1(H).Performance testing deadlines from the General Provisions of 40 CFR pt. 60 andpt. 63 are examples of deadlines for which the MPCA does not have authority togrant extensions and therefore do not meet the requirements of Minn. R.7007.1400, subp. 1(H).

Minn. R. 7007.1400, subp. 1(H)

Emission Inventory Report: due on or before April 1 of each calendar year followingpermit issuance, to be submitted on a form approved by the Commissioner.

Minn. R. 7019.3000 - 7019.3100

Emission Fees: due 30 days after receipt of an MPCA bill. Minn. R. 7002.0005 - 7002.0095


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-8

Subject Item: GP 001 Power Boilers

Associated Items: CE 001 Fabric Filter - High Temperature, i.e., T>250 Degrees F

CE 002 Fabric Filter - High Temperature, i.e., T>250 Degrees F

CM 001 Boiler 1, EU001, Opacity, 6-min avg.


EU 001 Power Boiler 1 - Boiler


SV 001 Power House Unit #1



The Permittee is authorized to construct the following equipment: Low NitrogenOxide Burners with Overfire Air Systems for EU 001 and EU 002. The constructionauthorization expires if construction does not commence within 18 months afterreceipt of such approval by Air Emissions Permit No. 07500003-009, if constructionis discontinued for a period of 18 months or more, or if construction is notcompleted within a reasonable time.

40 CFR Section 52.21(r)(2) and Minn. R. 7007.3000


For each unit in GP 001 to not be an affected unit subject to the requirements of theFederal Acid Rain Program, 40 CFR Section 72.6(b)(4)(i), each unit in GP 001 shallretain the cogeneration qualifying facility status, as per the Public Utility RegulatoryPolicies Act of 1978; and shall be restricted in supplying electricity to any utilitypower distribution system to, on a three-year rolling average basis:

1) less than or equal to one-third of its potential electrical output capacity; and2) less than or equal to 219,000 MWe-hrs actual electric output (on a gross basis).

To avoid classification as an affected source under 40CFR Section 72.6; Minn. R. 7007.0800, subp. 2

For each unit in GP 001 to not be an affected unit subject to the requirements of theNational Emission Standards for Hazardous Air Pollutants for Coal and Oil-FiredElectric Utility Steam Generating Units, 40 CFR pt. 63, subp. UUUUU, each unit inGP 001 shall cogenerate both electrical and useful thermal/mechanical energy fromthe same primary energy source; and shall be restricted in supplying electricity toany utility power distribution system to, on a 12-month rolling average basis:

1) less than or equal to one third of its potential electric output capacity; and2) less than or equal to 25 megawatts electric (MWe) output.

Title I Condition: To avoid classification as an affectedsource under 40 CFR Section 63.9982; Minn. R.7007.0800, subp. 2

The Permittee shall maintain and operate the control equipment at all times thatany emission unit controlled by the equipment is in operation. The Permittee shalldocument periods of non-operation of the control equipment.

Title I Condition: To avoid classification as a majormodification under 40 CFR Section 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800, subps. 2 and 14

CONTROL EQUIPMENT REQUIREMENTS hdr

The Permittee shall operate and maintain the fabric filter in accordance with theOperation and Maintenance (O & M) Plan. The Permittee shall keep copies of theO & M Plan available onsite for use by staff and MPCA staff.

Minn. R. 7007.0800, subp. 14

Pressure Drop: within the prescribed range according to the manufacturer'sspecifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3based on the values recorded during the most recent MPCA-approved performancetest where compliance was demonstrated. The new range shall be implementedupon receipt of the Notice of Compliance letter granting preliminary approval. Therange is final upon issuance of a permit amendment incorporating the change. ThePermittee shall record the pressure drop at least once every 24 hours.

Title I Condition: To avoid classification as a majormodification under 40 CFR Section 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800, subps. 2 and 14

MONITORING AND RECORDKEEPING REQUIREMENTS hdr

Data Collection: The Permittee shall maintain a continuous hard copy readout orcomputer disk file of the generation of electricity, steam use, and the sale ofelectricity from each boiler. The generation of electricity, steam use, and sale ofelectricity shall be calculated and recorded at least once every hour.

Title I Condition: To avoid classification as an affectedsource under 40 CFR Section 63.9982; To avoidclassification as an affected source under 40 CFRSection 72.6; Minn. R. 7007.0800, subp. 4; Minn. R.7007.0800, subp. 5

Daily Monitoring: The Permittee shall verify the operation of the monitoringequipment at least once each operating day to verify that it is working andrecording properly. The Permittee shall maintain a written or electronic record of thedaily verifications.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-9

Monitoring Equipment: The Permittee shall install and maintain the necessarymonitoring equipment for measuring and recording generation of electricity, steamuse, and the sale of electricity. The monitoring equipment must be installed, in use,and properly maintained when the monitored boilers are in operation.


PERFORMANCE TESTING REQUIREMENTS hdr

Performance Test: due 1,080 days after 07/22/2004 and every three yearsthereafter to measure PM/PM10 emissions from one stack on a rotating basis inGP 001.

Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000; Minn. R. 7017.2020, subp. 1

Performance Test: due before 06/26/2014 and every five years thereafter tomeasure SO2 emissions from one stack on a rotating basis in GP 001.


CONTINUOUS OPACITY MONITORING (COM) hdr

Continuous Opacity Monitoring: The Permittee shall use CM 001 for SV 001 andCM 008 for SV 002 to measure opacity.

Minn. R. 7017.1000, subp. 1; Minn. R. 7007.0800,subp. 2

Continuous Operation: Except for system startups, shutdowns, breakdowns,repairs, calibration checks, and zero and span adjustments, the Permittee shalloperate CM 001 continuously when venting exhaust gas from EU 001 throughSV 001, and operate CM 008 continuously when venting exhaust gas fromEU 002 through SV 002.

Minn. R. 7007.0800, subp. 2

Daily Calibration Drift (CD) Check: The CD shall be quantified and recorded at zero(low-level) and upscale (high-level) opacity at least once daily. CM 001 and CM008 must be adjusted whenever the calibration drift exceeds twice the specificationof PS-1 of 40 CFR 60, Appendix B.

Minn. R. 7017.1000

COMS Calibration Error Audit: due before half-year starting 07/14/2006 . Conductthree point calibration error audits at least 3 months apart but no greater than 8months apart. Filter values used shall correspond to approximately 11%, 20%, and37% opacity.

Minn. R. 7007.0800, subp. 2

COMS Monitoring Data: The Permittee shall reduce all COMS data to 6-minuteaverages. Opacity averages shall be calculated from all equally spacedconsecutive 10-second (or shorter) data points in the 6-minute averaging period.

Minn. R. 7007.0800, subp. 2

Recordkeeping: The Permittee must retain records of all COMS monitoring dataand support information for a period of five years from the date of the monitoringsample, measurement, or report. Records shall be kept at the source.

Minn. R. 7007.0800, subp. 5

SO2 EMISSION MONITORING REQUIREMENTS hdr

Fuel Properties Monitoring: The Permittee shall obtain, from the supplier for eachfuel shipment, a certificate that specifies sulfur content (in percent sulfur by weight)and heating value of the fuel (in BTU per lb). For any shipment received withoutthe certificate, the Permittee shall sample the shipment for analysis of sulfurcontent and heating value.


Fuel Usage & Sulfur Dioxide Emission Rate Monitoring: By the fifteenth day ofeach calendar month, the Permittee shall collect recorded fuel usage rate (U, intons) for the previous calendar month, calculate and record (at the time ofcalculation) the sulfur dioxide emission for the previous month as follows:

E = U * S * 2

where:

E = SO2 emissions in tons for the previous month,U = Tons of coal used for the previous month,S = percent by weight of sulfur in coal, based on most current supplier certification,2 = molar ratio of sulfur dioxide to sulfur

This method of Fuel Usage & sulfur Dioxide Emission Rate Monitoring may bechanged by the MPCA, upon a written notification from the Permittee that the sulfurcontent in the coal exceeded 0.50%.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-10

Subject Item: GP 002 Process Boilers

Associated Items: EU 003 Process Boiler 1 - Boiler

EU 004 Process Boiler 2 - Boiler

SV 003 Process Boiler #1 & #2


POLLUTANT LIMITS hdr

Total Particulate Matter: less than or equal to 0.6 lbs/million Btu heat input . Thislimit applies individually to both EU 003 and EU 004.

Minn. R. 7011.0510, subp. 1

PM < 10 micron: less than or equal to 0.024 lbs/million Btu heat input . This limitapplies individually to both EU 003 and EU 004.


Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when burning oil.This limit applies individually to both EU 003 and EU 004.

Minn. R. 7011.0510, subp. 1

The Permittee shall restrict the sulfur content of any grade of commercial fuel oil sothat SO2 emission does not exceed 0.21 lb SO2/million BTU. This limit appliesindividually to both EU 003 and EU 004. This Title I Condition is more stringentthan the limit prescribed by Minn. R. 7011.0510, subp. 1 which also applies.


Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. This limit applies individually to bothEU 003 and EU 004.

Minn. R. 7011.0510, subp. 2


Fuel Limits: The Permittee shall combust only natural gas or distillate fuel oil in thisgroup.

Minn. R. 7007.0800, subp. 2


Initial Performance Test: due 180 days after Resuming Operation to measure SO2emission from one process boiler, when it is fired with distillate fuel oil. ThePermittee shall also sample and analyze the fuel for sulfur content, heating value,and density.


Initial Performance Test: due 180 days after Resuming Operation to measure PMand PM10 emission and Opacity from either EU 003 or EU 004.


SO2 EMISSION MONITORING REQUIREMENTS hdr




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-11

Subject Item: GP 003 Crude Ore Rail Car Unloading

Associated Items: CE 007 Fabric Filter - Low Temperature, i.e., T<180 Degrees F

CE 008 Fabric Filter - Low Temperature, i.e., T<180 Degrees F

EU 007 West Car Dump - Material Handling Equipment

EU 008 East Car Dump - Material Handling Equipment

SV 007 East Car Dump




PM < 10 micron: less than or equal to 0.0025 grains/dry standard cubic foot . Thislimit applies individually to both EU 007 and EU 008.


Total Particulate Matter: less than or equal to 0.0025 grains/dry standard cubic foot. This limit applies individually to both EU 007 and EU 008. This is more stringentthan the limit prescribed by 40 CFR Section 60.382(a)(1) which also applies.


Total Particulate Matter: less than or equal to 0.022 grains/dry standard cubic foot(0.05 grams/dry standard cubic meter). This limit applies individually to both EU007 and EU 008.

40 CFR Section 60.382(a)(1); Minn. R. 7011.2700

Opacity: less than or equal to 7 percent opacity . This limit applies individually toboth EU 007 and EU 008.


Opacity: less than or equal to 10 percent opacity for any process fugitive emissions.This limit applies individually to both EU 007 and EU 008.

40 CFR Section 60.382(b); Minn. R. 7011.2700

POLLUTION CONTROL EQUIPMENT REQUIREMENTS hdr

The Permittee shall operate and maintain a bag leak detector for each fabric filter atall times that each fabric filter and emission unit controlled by the fabric filter is inoperation. Operation and maintenance of the bag leak detector shall be included inthe O & M Plan.

Minn. R. 7007.0800, subps. 2 & 14


Performance Test: due 1,800 days after 07/22/2004 and every five years thereafterto measure PM/PM10 emissions from one stack on a rotating basis in GP 003.


NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS:TACONITE ORE PROCESSING (40 CFR Part 63 Subpart RRRRR, commonlyreferred to as the Taconite MACT Requirements)

The requirements of the Taconite MACT apply individually to each unit in this groupunless otherwise stated.

Minn. R. 7007.0800, subp. 2

Total Particulate Matter: less than or equal to 0.008 grains/dry standard cubic footusing 6-hour average and on the basis of a flow-weighted mean concentrationusing test methods and procedures consistent with 40 CFR Section 63.9621(b)(1) -(3) and Table 1. For each ore crushing and handling source, the Permittee shalldetermine the flow-weighted mean concentration of particulate matter emissionsfrom all emission units in each affected source following the procedures in 40 CFRSection 63.9620(a)and 63.9621(b).

40 CFR Section 63.9590(a);40 CFR Section63.9621(b); Minn. R. 7011.8030

The Permittee may elect to group a maximum of six similar emission units togetherand conduct a performance test on one representative emission unit within eachgroup of similar units. The determination of whether emission units are similar shallmeet the criteria of 40 CFR Section 63.6920(f). If testing representative emissionunits, the Permittee shall prepare and submit a testing plan as described in 40 CFRSection 63.6920(g).

40 CFR Section 63.9620(e); Minn. R. 7011.8030

Performance Test: due before end of each calendar 60 months starting 12/31/2010to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(b)(1) - (3) and 40 CFR pt. 63, subp. RRRRR, Table 1 todemonstrate compliance with Taconite NESHAP ore crushing limitations.

The first performance test in the five calendar year period after initial compliancedemonstration was completed on 03/31/2011.

40 CFR Section 63.9630(a); Minn. R. 7011.8030


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-12

For each baghouse required to meet any particulate emission limit in Table 1 of 40CFR pt. 63, subp. RRRRR, the Permittee shall demonstrate continuous complianceby: 1. Maintaining records of the time you initiated corrective action in the event of abag leak detection system alarm, the corrective action(s) taken, and the date onwhich corrective action was completed.2. Inspecting and maintaining each baghouse according to the requirements in 40CFR Section 63.9631(a)(1) through (8) and recording all information needed todocument conformance with these requirements. If you increase or decrease thesensitivity of the bag leak detection system beyond the limits specified in yoursite-specific monitoring plan, you must include a copy of the required writtencertification by a responsible official in the next semiannual compliance report.

40 CFR Section 63.9634(d); Minn. R. 7011.8030


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-13

Subject Item: GP 004 Crushed Ore Storage



EU 009 Fine Crusher Bin Storage - West - Silo/Bin

EU 010 Fine Crusher Bin Storage - East - Silo/Bin

SV 009 Fine Crusher Bin Storage - W

SV 010 Fine Crusher Bin Storage - E





Total Particulate Matter: less than or equal to 0.0025 grains/dry standard cubic foot. This limit applies individually to both EU 009 and EU 010. This is more stringentthan the limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies.


Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limitapplies individually to both EU 009 and EU 010.

Minn. R. 7011.0710, subp. 1(A)

Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. An exceedance of this opacitystandard occurs whenever any one-hour period contains two or more six-minuteperiods during which the average opacity exceeds 20%, or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60%. This limit applies individually to both EU 009 and EU 010.

Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14


Initial Performance Test: due before 04/15/2006 to measure PM and PM10emissions from one stack in GP 004.




Minn. R. 7007.0800, subp. 2









07500003 - 010

Facility Name:

Permit Number:

02/05/15A-14




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-15

Subject Item: GP 005 Tertiary Crushing









EU 011 Crusher Line 4 - Crusher








SV 011 Fine Crushing Line 4










PM < 10 micron: less than or equal to 0.0025 grains/dry standard cubic foot . Thislimit applies individually to each unit in this group.

Title I Condition: 40 CFR Sections 52.21(k)&(j)(BACT); Minn. R. 7007.3000

Total Particulate Matter: less than or equal to 0.0025 grains/dry standard cubic foot. This limit applies individually to each unit in this group. This is more stringent thanthe limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies.

Title I Condition: 40 CFR Sections 52.21(k)&(j)(BACT); Minn. R. 7007.3000

Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limitapplies individually to each unit in this group.

Minn. R. 7011.0710, subp. 1(A)

Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. An exceedance of this opacitystandard occurs whenever any one-hour period contains two or more six-minuteperiods during which the average opacity exceeds 20%, or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60%. This limit applies individually to each unit in this group.

Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-16

Performance Test: due before end of each calendar year starting 07/14/2006 tomeasure PM and PM10 emissions from two stacks on a rotating basis in this group.The performance testing frequency may be relaxed from two per year to two perthree years according to the following conditions:

a. The Permittee has demonstrated three (3) consecutive years that the PM or PM10 emission limit has not been exceeded; andb. The performance test result shall not be greater than 90% of the limit.

If a subsequent performance test result is greater than 90% of the PM or PM10emission limit, then the testing frequency shall revert back to the original yearlybasis until subsequent yearly testing produces three consecutive annualperformance test results which satisfy the criteria listed above; at that time, thetesting may again be two per three years.

Title I Condition: 40 CFR Section 52.21(k), and (j)(BACT); Minn. R. 7007.3000; Minn. R. 7017.2020,subp. 1



Minn. R. 7007.0800, subp. 2











07500003 - 010

Facility Name:

Permit Number:

02/05/15A-17

Subject Item: GP 006 Crushed Ore Conveying



EU 015 Crushed Ore Conveyors - West - Conveyor

EU 016 Crushed Ore Conveyors - East - Conveyor

SV 015 Crushed Ore Conveyors - W

SV 016 Crushed Ore Conveyors - E








Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14


Initial Performance Test: due before 12/15/2005 to measure PM and PM10emissions from one stack in this group.


Initial Performance Test: due before 12/15/2005 to measure opacity from one stackin this group.

Minn. R. 7017.2020, subp. 1



Minn. R. 7007.0800, subp. 2









07500003 - 010

Facility Name:

Permit Number:

02/05/15A-18




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-19

Subject Item: GP 007 Dry Cobbing & Conveying






EU 021 Dry Cobbing - West - Separation Equipment

EU 022 Dry Cobbing - East - Separation Equipment

EU 023 Dry Cobbing - West Center - Separation Equipment

EU 024 Dry Cobbing - Center - Separation Equipment

EU 025 Dry Cobbing - East Center - Separation Equipment

SV 021 Dry Cobber - West

SV 022 Dry Cobber - East

SV 023 Dry Cobber - West Center

SV 024 Dry Cobber - Center

SV 025 Dry Cobber - East Center








Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14




Initial Performance Test: due before 02/15/2008 to measure PM and PM10emissions from another stack in this group.



Minn. R. 7017.2020, subp. 1



Minn. R. 7007.0800, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-20











07500003 - 010

Facility Name:

Permit Number:

02/05/15A-21

Subject Item: GP 008 Coarse Tails Handling





EU 026 Coarse Tails Conveying - Conveyor


EU 028 Coarse Tails Transfer - Conveyor

EU 029 Coarse Tails Loadout - Material Handling Equipment

SV 026 Tails Belts

SV 027 Tails Belts

SV 028 Tails Belts

SV 029 Tails Belts





Total Particulate Matter: less than or equal to 0.0025 grains/dry standard cubic foot. This limit applies indidivually to each unit in this group. This is more stringent thanthe limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies.



Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14





Minn. R. 7017.2020, subp. 1



Minn. R. 7007.0800, subp. 2




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-22









07500003 - 010

Facility Name:

Permit Number:

02/05/15A-23

Subject Item: GP 009 Concentrator Bins - W or E; with Cartridge Collectors



EU 030 West Transfer Bin - Silo/Bin

EU 031 East Transfer Bin - Silo/Bin

SV 030 Concentrator Transfer Bin - W

SV 031 Concentrator Transfer Bin - E








Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14

Gas Stream Pressure Drop: Monitor and record individually for each CE at leastonce every day when in operation. The pressure drop shall be greater than or equalto 1.0 inches of water. Once the operating range is established it becomes anenforceable part of this permit. A deviation from the established range shall triggera corrective action as detailed in the O&M plan.

Minn. R. 7007.0800, subps. 4, 5 & 14





Minn. R. 7017.2020, subp. 1



Minn. R. 7007.0800, subp. 2






07500003 - 010

Facility Name:

Permit Number:

02/05/15A-24







07500003 - 010

Facility Name:

Permit Number:

02/05/15A-25

Subject Item: GP 010 Concentrator Bins





















EU 033 West Storage Bin #2 - Silo/Bin

EU 034 West Storage Bins #3 - Silo/Bin









EU 044 East Storage Bin #101 - Silo/Bin










SV 033 Conc Bin - Section 2






07500003 - 010

Facility Name:

Permit Number:

02/05/15A-26

Associated Items: SV 038 Conc Bin - Section 7

















PM < 10 micron: less than or equal to 0.0030 grains/dry standard cubic foot . Thislimit applies individually to each unit in this group. This limit shall apply individuallyto all operating concentrator lines after 12/31/2006. Prior to that time, up to fourconcentrators from the Group of EU 042 and EU 044-052, may be subject to adifferent limit of less than or equal to 0.063 grains/dry standard cubic foot, unlessmore than two concentrators from the group of EU 033-041 are operating.

Title I Condition: 40 CFR Section 52.21(k), and (j)(BACT); Minn. R. 7007.3000

Total Particulate Matter: less than or equal to 0.0030 grains/dry standard cubic foot. This limit applies individually to each unit in this group and is more stringent thanthe limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies. This limitshall apply individually to all operating concentrator lines after 12/31/2006. Prior tothat time, up to four concentrators from the Group of EU 042 and EU 044-052, maybe subject to a different limit of less than or equal to 0.063 grains/dry standardcubic foot, unless more than two concentrators from the group of EU 033-041 areoperating.



Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 2 & 14

Gas Stream Pressure Drop: Upon installation of monitoring equipment, monitor andrecord individually for each fabric filter at least once every day when in operation.Once the operating range is established it becomes an enforceable part of thispermit. A deviation from the established range shall trigger a corrective action asdetailed in the O&M plan.

Minn. R. 7007.0800, subps. 4, 5 & 14


Initial Performance Test: due before 04/15/2006 to measure PM and PM10emissions from one stack in this group equipped with a fabric filter.



Minn. R. 7017.2020, subp. 1


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-27



Minn. R. 7007.0800, subp. 2











07500003 - 010

Facility Name:

Permit Number:

02/05/15A-28

Subject Item: GP 012 Additive Handling & Storage - West (by SV locations)






EU 072 West Additive Bin 2 - Silo/Bin


EU 074 West Additive Blending 1 & 2 - Blowing Equipment



SV 072 West Pel Bentonite Storage 2


SV 074 Fce 1,2 Bentonite Day Bin & Air Slide







Total Particulate Matter: less than or equal to 0.010 grains/dry standard cubic foot .This limit applies individually to each unit in this group. This is more stringent thanthe limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies.



Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)


Process monitoring: the visual emissions observer in the facility staff shall checkstack visible emissions (opacity) for each unit in this group once daily using one ormore Daily Visible Emission Checklists.

Minn. R. 7007.0800, subps. 4, 5 & 14

Gas Stream Pressure Drop: Upon installation of monitoring equipment, monitor andrecord individually for each CE at least once every day when in operation. Thedifferential pressure shall be greater than or equal to 1 inches water column. Oncethe operating range is established it becomes an enforceable part of this permit. Adeviation from the established range shall trigger a corrective action as detailed inthe O&M plan. (Note these baghouses are shaker style units that do not employ acleaning cycle pulse for bag cleaning.)

Minn. R. 7007.0800, subps. 4, 5 & 14


Performance Test: due 1,800 days after 01/31/2005 and every five years thereafterto measure PM and PM10 emissions from two stacks on a rotating basis in the poolof GP 012 and GP 013.


Performance Test: due 1,800 days after 01/31/2005 and every five years thereafterto measure opacity from two stacks on a rotating basis in the pool of GP 012 andGP 013.

Minn. R. 7017.2020, subp. 1


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-29

Subject Item: GP 013 Additive Handling & Storage - East (by SV locations)









EU 077 East Additive Blending - Fce 11 Day Bin - Silo/Bin

EU 078 East Additive Blending - Fce 11 Air Slide - Blowing Equipment



EU 081 East Additive Bins 3-4 - Silo/Bin


EU 083 East Additive Unload - Material Handling Equipment

EU 084 East Additive Unload, Supplemental - Material Handling Equipment

SV 077 Furnace 11 Day Bin Collector

SV 078 Furnace 11 Air Slide Collector



SV 081 East Pel Ben Storage Bin 3,4


SV 083 Bentonite Unloading Collector

SV 084 Supplemental Ben Unload Col








Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)



Minn. R. 7007.0800, subps. 4, 5 & 14

Gas Stream Pressure Drop: Upon installation of monitoring equipment, monitor andrecord individually for each CE at least once every day when in operation. Thedifferential pressure shall be greater than or equal to 0.1 inches water column.Once the operating range is established it becomes an enforceable part of thispermit. A deviation from the established range shall trigger a corrective action asdetailed in the O&M plan. (Note these baghouses are shaker style units that do notemploy a cleaning cycle pulse for bag cleaning.)

Minn. R. 7007.0800, subps. 4, 5 & 14


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-30




Performance Test: due 1,800 days after 01/31/2005 and every five years thereafterto measure opacity from two stacks on a rotating basis in the pool of GP 012 andGP 013.

Minn. R. 7017.2020, subp. 1


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-31

Subject Item: GP 014 Pellet Indurating Furnaces

Associated Items: CE 101 Electrostatic Precipitator - High Efficiency

CE 102 Electrostatic Precipitator - High Efficiency















EU 100 Furnace 11 Hood Exhaust #1101, #1102, & #1103 - Furnace

EU 104 Furnace 11 Waste Gas #1105 & #1104 - Furnace



EU 262 Furnace 6 H.E./W.G. #601, #602, & #603 - Furnace

EU 634 Furnace 5 HE-WG #501; #502; #503 - Furnace

SV 101 Furnace 11 Hood Exhaust



SV 104 Furnace 11 Waste Gas







SV 261 Furnace 6 Hood Exhaust-Waste Gas



SV 266 Fce 5 HE-WG #501;#502;#503

SV 267 Fce 5 HE-WG #501;#502;#503

SV 268 Fce 5 HE-WG #501;#502;#503

SV 270 Fce 11 Hood Exhaust Bypass

SV 271 Fce 11 Waste Gas Bypass



SV 274 Fce 5 HE-WG Bypass



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-32



PM < 10 micron: less than or equal to 0.020 grains/dry standard cubic foot for EU100 and EU 110 individually.


PM < 10 micron: less than or equal to 0.01 grains/dry standard cubic foot for EU104, EU 114, EU 262 and EU 634 individually.


PM < 10 micron: less than or equal to 0.18 lbs/million Btu heat input for EU 634individually.


Total Particulate Matter: less than or equal to 0.020 grains/dry standard cubic footfor EU 100 and EU 110 individually. This is more stringent than the limit prescribedby Minn. R. 7011.0610, subp. 1(A) which also applies.


Total Particulate Matter: less than or equal to 0.01 grains/dry standard cubic foot forEU 104, EU 114, EU 262, and EU 634 individually. This is more stringent than thelimit prescribed by Minn. R. 7011.0610, subp. 1(A) which also applies.


Total Particulate Matter: less than or equal to 0.18 lbs/million Btu heat input for EU634 individually. This is more stringent than the limit prescribed by Minn. R.7011.0610, subp. 1(A) which also applies.


Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limitapplies individually to each SV in this group except the bypass stacks.

Minn. R. 7011.0610, subp. 1(A)

Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60% opacity. An exceedance of this opacity standardoccurs whenever any one-hour period contains two or more 6-minute periodsduring which the average opacity exceeds 20%, or whenever any one-hour periodcontains one or more 6-minute periods during which the average opacity exceeds60%. This limit applies individually to each SV in this group except the bypassstacks.

Minn. R. 7011.0610, subp. 1(B)

Sulfur Dioxide: less than or equal to 0.22 lbs/million Btu heat input for EU 100 andEU 110 individually. This is more stringent than the limit prescribed by Minn. R.7011.0610, subp. 2(B)(1) which also applies.





Title I Condition: 40 CFR Section 52.21(k) and (j)(BACT); Minn. R. 7007.3000

Sulfur Dioxide: less than or equal to 0.072 lbs/million Btu heat input for EU 634individually when burning natural gas. This is more stringent than the limitprescribed by Minn. R. 7011.0610, subp. 2(B)(1) which also applies.

Title I Condition: 40 CFR Section 52.21(k) and (j)(BACT); Minn. R. 7007.3000

Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when theindurating furnace is fired with a liquid fossil fuel. This limit applies individually toeach furnace in this group.

Minn. R. 7011.0610, subp. 2(B)(1)

Nitrogen Oxides: less than or equal to 40 parts per million for EU 634 individually. Title I Condition: 40 CFR Section 52.21(j) (BACT);Minn. R. 7007.3000

Nitrogen Oxides: less than or equal to 46 lbs/hour for EU 634 individually. Title I Condition: 40 CFR Section 52.21(j) (BACT)limits; Minn. R. 7007.3000


Wet ESP Requirement: The Permittee shall operate all wet electrostaticprecipitators associated with each furnace and, for each Wet ESP, with at least oneand no fewer than the same number of electric fields on as during the most recentperformance test that has shown compliance with the PM and PM10 emission limitsfor this group.

Minn. R. 7007.0800, subp. 14

Wet ESP Requirement: Monitor and record whether the electric field is on for eachCE once every 24 hours when in operation. Monitor and record primary amperage,primary voltage, and inlet gas temperature for each CE once every 24 hours whenin operation.

Minn. R. 7007.0800, subps. 4, 5 & 14

Water Flow Rate: Monitor and record the water flow rate to each CE once every 24hours when in operation. The water flow rate shall be greater than or equal to 145gallons/minute. Once the operating range is established it becomes anenforceable part of this permit. A deviation from the established range shall triggera corrective action as detailed in the O&M plan.

Minn. R. 7007.0800, subps. 4, 5 & 14


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-33

Bypass Event Record Keeping: the Permittee shall record and maintain records ofthe time, date, duration, cause, and corrective action of wet ESP bypass events.

Minn. R. 7007.0800, subp. 5

MONITORING REQUIREMENTS hdr

Emissions Monitoring: The owner or operator shall install and operate a NOxContinuous Emission Monitoring System (CEMS) to measure NOx emissionsfrom EU 634. One NOx monitor shall be installed on each stack (SV 266, SV 267,and SV 268).

Title I Condition: 40 CFR Section 52.21(j): (BACT);Minn. R. 7007.3000; Minn. R. 7017.1006

Emissions Monitoring: The owner or operator shall install and operate an offgasflow monitoring system to measure offgas flow from EU 634. One flow meter shallbe installed on each stack (SV 266, SV 267, and SV 268).

(This is needed to determine the mass of emissions from the concentrationmeasurements.)


Initial Startup of the Monitor: due 180 days after Initial Startup of Furnace 5. As ofthis date, each of the NOx monitors and flow meters shall be installed andoperational.



Initial Performance Test: due 180 days after Initial Startup to measure PM, PM10,and SO2 emissions from Furnace 5. Sampling shall be performed for at least onestack and the gas flow rate shall be determined for all stacks except the bypassstacks.


Performance Test: due before 08/28/2014 and every three years thereafter tomeasure PM and PM10 emissions from two furnaces (on a rotating basis, one fromFurnaces 11 and 12 and the other from Furnaces 5 and 6) in this group. PM andPM10 sampling shall be performed for at least two stacks for Furnace 11 orFurnace 12, and for at least one stack for Furnace 5 or Furnace 6. Gas flow rateshall be determined for all stacks of each furnace except the bypass stacks.


Performance Test: due 60 days after Startup with fuel oil followed by 500 hours ofuse of fuel oil at any furnace, to measure SO2 emissions. Sampling shall beperformed for at least two stack for Furnace 11 or Furnace 12, and for at least onestack for Furnace 5 or Furnace 6. Gas flow rate shall be determined for all stacks ofeach furnace except the bypass stacks.




Minn. R. 7007.0800, subp. 2

Total Particulate Matter: less than or equal to 0.01 grains/dry standard cubic footusing a 6-hour Average and on the basis of a flow-weighted mean concentrationusing test methods and procedures consistent with 40 CFR Section 63.9621(c)(1) -(3) and Table 1. For each indurating source, the Permittee shall determine theflow-weighted mean concentration of particulate matter emissions from all emissionunits in each affected source following the procedures in 40 CFR Section63.9620(b)and 63.9621(c).

40 CFR Section 63.9590(a);40 CFR Section63.9621(c); Minn. R. 7011.8030

Performance Test: due before end of each calendar 60 months starting 12/31/2012to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(c)(1) - (3) and 40 CFR pt. 63, subp. RRRRR,Table 1 todemonstrate compliance with Taconite NESHAP indurating furnace limitations.

This is the first of the 2 performance tests required for each stack associated withEU100 for the 5 year calendar period beginning 12/31/2012 and ending 12/31/2017.

Performance tests shall be conducted at least 2 times every 5 calendar years (thetest must be conducted at least 1 year apart to determine particulate matteremissions for compliance with the Taconite MACT Standard).

Performance tests shall be conducted on all stacks associated with EU100. Theperformance tests shall be conducted within a reasonable period of time, such thatthe operating characteristics remain representative for the duration of the stacktests.

The first performance test in the five calendar year period was completed on05/14/2013 for EU100.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-34


This is the second of the 2 performance tests required for each stack associatedwith EU100 for the 5 year calendar period beginning 12/31/2012 and ending12/31/2017.






















07500003 - 010

Facility Name:

Permit Number:

02/05/15A-35




















07500003 - 010

Facility Name:

Permit Number:

02/05/15A-36



















07500003 - 010

Facility Name:

Permit Number:

02/05/15A-37







Water flow rate: greater than or equal to 145 gallons/minute using 24-hour BlockAverage for CE101 (EU100/SV101). This limit is established following theprocedures in 40 CFR Section 63.9622.

40 CFR Section 63.9590(b)(4); 40 CFR Section63.9622(d); Minn. R. 7011.8030

Secondary Voltage: greater than or equal to 0 kilovolts using 24-hour BlockAverage for CE101 (EU100/SV101). This limit is established following theprocedures in 40 CFR Section 63.9622.

The ESP grids shall be in operation as stated above.


Temperature: less than or equal to 121 degrees F using 24-hour Block Average forCE101 (EU100/SV101). This limit is established following the procedures in 40CFR Section 63.9622.


















Secondary Current: greater than or equal to 0 kilovolts using 24-hour BlockAverage for CE104 (EU104/SV104). This limit is established following theprocedures in 40 CFR Section 63.9622.








07500003 - 010

Facility Name:

Permit Number:

02/05/15A-38












































07500003 - 010

Facility Name:

Permit Number:

02/05/15A-39






















Secondary Voltage: greater than or equal to 0 degrees F using 24-hour BlockAverage for CE271 (EU634/SV266). This limit is established following theprocedures in 40 CFR Section 63.9622.




















07500003 - 010

Facility Name:

Permit Number:

02/05/15A-40

The Permittee shall establish site-specific operating limits according to the followingprocedures:1. Using the CPMS required in 40 CFR Section 63.9631(e), measure and recordthe secondary voltage, water flow rate, and stack outlet temperature every 15minutes during each run of the particulate matter performance test.2. For each individual test run, calculate and record the average value forsecondary voltage, and water flow rate. Operating limits are established as thelowest average value for each operating parameter corresponding to any of thethree test runs.3. For each individual test run, calculate and record the average value of stackoutlet temperature. The limit is established as the maximum average value forstack outlet temperature corresponding to any of the three test runs.


Install, operate, and maintain each CPMS according to the requirements in 40 CFRSection 63.9632(b)-(e) and monitor the daily average secondary voltage, dailyaverage stack outlet temperature, and daily average water flow rate according tothe requirements in 40 CFR Section 63.9633.


The Permittee shall demonstrate continuous compliance by:1. Maintaining the daily average secondary voltage and daily average water flowrate for each field at or above the minimum levels established during the initial orsubsequent performance test. 2. Operating and maintaining each CPMS accordingto 40 CFR section 63.9632(b) and recording all the information needed todocument conformance with these requirements. 3. Collecting and reducingmonitoring data for secondary voltage, stack outlet temperature and water flow rateaccording to 40 CFR section 63.9632(c) and recording all the information needed todocument conformance with these requirements.4. If the daily average secondary voltage for each field is below the operating limitsestablished for a corresponding emission unit or group of similar emission units, thePermittee shall then follow the corrective action procedures in 40 CFR Section63.9634(j).

40 CFR Section 63.9634(h); Minn. R. 7011.8030


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-41

Subject Item: GP 015 Furnace Discharge of Finished Pellets

Associated Items: CE 120 Rotoclone

CE 121 Rotoclone

CE 265 Rotoclone

CE 274 Wet Scrubber-High Efficiency

EU 120 Furnace 11 Discharge - Material Handling Equipment




SV 120 Furnace 11 Discharge






PM < 10 micron: less than or equal to 0.011 grains/dry standard cubic foot for SV120 and SV 121 individually.


PM < 10 micron: less than or equal to 0.012 grains/dry standard cubic foot for SV265 individually.



Title I Condition: 40 CFR Section 52.21(k) & (j)(BACT); Minn. R. 7007.3000

Total Particulate Matter: less than or equal to 0.011 grains/dry standard cubic footfor SV 120 and SV 121 individually. This is more stringent than the limit prescribedby Minn. R. 7011.0710, subp. 1(A) which also applies.


Total Particulate Matter: less than or equal to 0.012 grains/dry standard cubic footfor SV 265 individually. This is more stringent than the limit prescribed by Minn. R.7011.0710, subp. 1(A) which also applies.

Title I Condition: 40 CFR Section 52.21(k)&(j) (BACT);Minn. R. 7007.3000


Title I Condition: 40 CFR Section 52.21(k) & (j)(BACT); Minn. R. 7007.3000


Minn. R. 7011.0710, subp. 1(A)


Minn. R. 7011.0710, subp. 1(B)


Gas Stream Pressure drop: Upon installation of monitoring equipment, monitor andrecord individually for each CE at least once every day when in operation. Once theoperating range is established it becomes an enforceable part of this permit. Adeviation from the established range shall trigger a corrective action as detailed inthe O&M plan.

This requirement of gas stream pressure drop may be replaced with a requirementof monitoring the associated fan motor amperage, if MPCA approves supportingfield data submitted by the Permittee for such replacement. Such field data shallbe developed during Initial Performance Testing for at least one rotoclonecontrolled stack each of GP 015 and GP 016. In the interim before the MPCAapproval, the Permittee shall perform both gas stream pressure drop monitoringand fan motor amperage monitoring to initiate the supporting field datadevelopment.

Minn. R. 7007.0800, subps. 4, 5 & 14


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-42

Liquid Flow Rate: Upon installation of monitoring equipment, monitor and recordindividually the scrubbing liquid flow rate to CE 274 at least once every day when inoperation. Once the operating range is established it becomes an enforceable partof this permit. A deviation from the established range shall trigger a correctiveaction as detailed in the O&M plan.

Minn. R. 7007.0800, subps. 4, 5 & 14


Initial Performance Test: due 180 days after Resuming Operation to measure PMand PM10 from SV 269.

Title I Condition: 40 CFR Section 52.21(k)&(j) (BACT);Minn. R. 7007.3000; Minn. R. 7017.2020, subp. 1

Performance Test: due 180 days after Resuming Operation of any emission unit inGP 015, to measure PM and PM10 emissions from one stack in this group otherthan SV 269. The presently required 3-year testing frequency for this group wouldrequire testing again by 6/15/2012 unless a new testing frequency is established.




Minn. R. 7007.0800, subp. 2

Total Particulate Matter: less than or equal to 0.008 grains/dry standard cubic footusing 6-hour average and on the basis of a flow-weighted mean concentrationusing test methods and procedures consistent with 40 CFR Section 63.9621(b)(1) -(3) and Table 1. For each finished pellet handling source, the Permittee shalldetermine the flow-weighted mean concentration of particulate matter emissionsfrom all emission units in each affected source following the procedures in 40 CFRSection 63.9620(c) and 63.9621(b).

40 CFR Section 63.9590(a); 40 CFR Section63.9621(b); Minn. R. 7011.8030

Performance Test: due before end of each 60 months starting 12/31/2011 tomeasure particulate matter consistent with test methods and procedures in 40 CFRSection 63.9621(b)(1) - (3) and 40 CFR pt. 63, subp. RRRRR, Table 1 todemonstrate compliance with Taconite NESHAP finished pellet handling limitations.


40 CFR Section 63.9630(c); Minn. R. 7011.8030

Water flow rate: greater than or equal to 144 gallons/minute using 24-hour BlockAverage . This limit is established following the procedures in 40 CFR Section63.9622.

40 CFR Section 63.9590(b)(1); 40 CFR Section63.9622(a); Minn. R. 7011.8030

Pressure Drop: greater than or equal to 8.8 inches of water column using 24-hourBlock Average measured across the wet scrubber. This limit is establishedfollowing the procedures in 40 CFR Section 63.9622.


The Permittee shall establish site-specific operating limits according to the followingprocedures:1. Using the CPMS required in 40 CFR Section 63.9631(b), measure and recordthe pressure drop and scrubber water flow rate every 15 minutes during each run ofthe particulate matter performance test.2. Calculate and record the average pressure drop and scrubber water flow rate foreach individual test run. Your operating limits are established as the lowest averagepressure drop and the lowest average scrubber water flow rate corresponding toany of the three test runs.

40 CFR Section 63.9622(a)(1)-(2); Minn. R. 7011.8030

The Permittee may establish a pressure drop operating limit by using historicalaverage pressure drop data as allowed by 40 CFR Section 63.9622(a)(3).


Install, operate, and maintain a CPMS according to the requirements in 40 CFRSection 63.9632(b)-(e) and monitor the daily average scrubber pressure drop andthe daily average scrubber water flow rate according to the requirements in 40 CFRSection 63.9633.





07500003 - 010

Facility Name:

Permit Number:

02/05/15A-43

The Permittee shall demonstrate continuous compliance by: 1. Maintaining thedaily average pressure drop and daily average scrubber water flow rate at or abovethe minimum levels established during the initial or subsequent performance test.2. Operating and maintaining each wet scrubber CPMS according to 40 CFRSection 63.9632(b) and recording all information needed to document conformancewith these requirements. 3. Collecting and reducing monitoring data for pressuredrop and scrubber water flow rate according to 40 CFR Section 63.9632(c) andrecording all information needed to document conformance with theserequirements.4. If the daily average pressure drop or daily average scrubber water flow rate isbelow the operating limits established for a corresponding emission unit or group ofsimilar emission units, you must then follow the corrective action procedures in 40CFR Section 63.9634(j).



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-44

Subject Item: GP 016 Pellet Screening (indoor - product & hearth layer)


CE 122 Rotoclone

CE 123 Rotoclone

CE 124 Rotoclone

CE 125 Rotoclone

EU 097 Hearth Layer - Silo/Bin

EU 122 Furnace 11 Pellet Screen - Screens

EU 123 Screen House North - Screens


EU 125 Screen House South - Screens

SV 097 Hearth Layer

SV 122 Furnace 11 Screening

SV 123 East Furnace Screen House





PM < 10 micron: less than or equal to 0.0063 grains/dry standard cubic foot for EU097 individually.


PM < 10 micron: less than or equal to 0.011 grains/dry standard cubic foot for EU122 - 124 individually.




Total Particulate Matter: less than or equal to 0.0063 grains/dry standard cubic footfor EU 097 individually. This is more stringent than the limit as prescribed by 40CFR Section 60.382(a)(1) which also applies.


Total Particulate Matter: less than or equal to 0.011 grains/dry standard cubic footfor EU 122 - 124 individually. This is more stringent than the limit as prescribed by40 CFR Section 60.382(a)(1) which also applies.




Total Particulate Matter: less than or equal to 0.05 grams/dry standard cubic meter(0.022 grains/dry standard cubic foot) of exhaust gas on and after the date onwhich the performance test required is completed. This limit applies individually toeach unit in this group.


Opacity: less than or equal to 7 percent opacity for SV 097. 40 CFR Section 60.382(a)(2); Minn. R. 7011.2700


Gas Stream Pressure Drop: Install, calibrate, maintain, and operate a monitoringdevice for each CE in this group for the continuous measurement and recording ofthe change in pressure of the gas stream through the CE. The monitoring devicemust be certified by the manufacturer to be accurate within 250 Pascals (1 inchwater) gauge pressure, plus or minus; and must be calibrated on an annual basis inaccordance with manufacturer's instructions.

40 CFR Section 60.384(a); 40 CFR Section 60.385(b);Minn. R. 7011.2700

On SV 097, Hearth Layer, maintain differential pressure across filter as follows:Pressure Drop: greater than or equal to 3.0 inches of water column and less than orequal to 10.0 inches of water column


Fan Motor Amperage: Install, calibrate, maintain, and operate a monitoring devicefor each CE in this group, except CE 097, for the continuous measurement andrecording of the fan motor amperage draw on the CE. This alternative monitoringparameter is approved for this group as per a November 30, 2004, letter from U.S.EPA to Northshore Mining. By no later than September 18, 2006, establish theoperating range and submit it in an updated O&M plan. Once submitted, it shallbecome an enforceable part of this permit. A deviation from the established rangeshall trigger a corrective action as detailed in the O&M plan.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-45


Minn. R. 7007.0800, subps. 2 & 14


Performance Test: due 120 days after Resuming Operation of EU 097 and everyfive years thereafter to measure PM and PM10 emissions from SV 097.


Performance Test: due 120 days after Resuming Operation of any emission unit inGP 016, to measure PM and PM10 emissions from one stack in this group otherthan SV 097.




Minn. R. 7007.0800, subp. 2

Total Particulate Matter: less than or equal to 0.008 grains/dry standard cubic footusing 24-hour Block Average using 6-hour average and on the basis of aflow-weighted mean concentration using test methods and procedures consistentwith 40 CFR Section 63.9621(b)(1) - (3) and Table 1. For each finished pellethandling source, the Permittee shall determine the flow-weighted meanconcentration of particulate matter emissions from all emission units in eachaffected source following the procedures in 40 CFR Section 63.9620(c) and63.9621(b).

40 CFR Section 63.9590(a); 40 CFR Section63.9621(b); Minn. R. 7011.8030

Performance Test: due before end of each calendar 60 months starting 12/31/2013to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(b)(1) - (3) and 40 CFR pt.63, subp. RRRRR, Table 1 todemonstrate compliance with Taconite NESHAP finished pellet handling limitations.

The first performance test in the five calendar year period after initial compliancedemonstration applying to CE 123, CE 124, CE 125, and CE 126 was completedon 09/23/2014.The first performance test in the five calendar year period after initial compliancedemonstration applying to CE 097 was completed on 08/11/2014.


Water flow rate: greater than or equal to 130 gallons/minute using 24-hour BlockAverage . This limit applies to CE122, CE123, CE124 and CE125 individually. Thislimit is established following the procedures in 40 CFR Section 63.9622.


Pressure Drop: greater than or equal to 7.0 inches of water column using 24-hourBlock Average measured across the wet scrubber. This limit applies to CE122,CE123, CE124 and CE125 individually. This limit is established following theprocedures in 40 CFR Section 63.9622.











07500003 - 010

Facility Name:

Permit Number:

02/05/15A-46




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-47

Subject Item: GP 019 Concentrate Loadout Operations

Associated Items: CE 205 6% or Greater Moisture Content

CE 275 6% or Greater Moisture Content





EU 637 Concentrate Loadout Conveyor - Conveyor

EU 638 Concentrate Elevating Conveyor - Conveyor

EU 639 Concentrate Transfer Conveyor - Conveyor

EU 640 Concentrate Shuttle Conveyor - Conveyor

EU 641 Concentrate Silo 1 Loadout to Railcar - Material Handling Equipment




Opacity: less than or equal to 10 percent opacity for any Process FugitiveEmissions.




Initial Performance Test: due 60 days after achieving maximum capacity, but nolater than 180 days after Initial Startup, to measure Process Fugitive Emissionsfrom emission units (beyond EU 637) in GP 019.

40 CFR Section 60.385(a) & (b); Minn. R. 7011.2700


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-48

Subject Item: GP 020 Taconite MACT - All Affected Sources















































07500003 - 010

Facility Name:

Permit Number:

02/05/15A-49










CE 120 Rotoclone

CE 121 Rotoclone

CE 122 Rotoclone

CE 123 Rotoclone

CE 124 Rotoclone




CE 265 Rotoclone




CE 280 Low NOx Burners

CE 285 Dust Suppression by Water Spray

























07500003 - 010

Facility Name:

Permit Number:

02/05/15A-50

Associated Items: EU 027 Coarse Tails Conveying - Conveyor








































EU 643 60 Conveyor - Conveyor

EU 644 I Conveyor - Conveyor

EU 645 J Conveyor - Conveyor

EU 646 New Conveyor - Conveyor



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-51


The requirements of the Taconite MACT apply individually to each unit in this groupunless otherwise stated. Additional information regarding compliance with SubpartRRRRR is presented in GP 003 - 010 and GP 014 - 016.

Minn. R. 7007.0800, subp. 2

The Permittee shall prepare a fugitive dust emissions control plan in accordancewith the requirements in 40 CFR Section 63.9591.

The Permittee shall prepare, and at all times operate according to, the fugitive dustcontrol plan that describes the measures that will be put in place to control fugitivedust emissions from stockpiles, material transfer points, plant roadways, tailingsbasin, pellet loading areas, and yard areas.

40 CFR Section 63.9591; 40 CFR Section 63.9624; 40CFR Section 63.9635; Minn. R. 7011.8030

A copy of the Fugitive Dust Emissions Control Plan shall be submitted for approvalto the Administrator on or before the applicable compliance date for the affectedsource as specified in 40 CFR Section 63.9583.

40 CFR Section 63.9591(b); 40 CFR Section63.9624(b); Minn. R. 7011.8030

The Permittee may use an existing fugitive dust emissions control plan provided itmeets the following requirements:1. The plans satisfies the requirements of 40 CFR Section 63.9591(a).2. The plan describes the current measures to control fugitive dust emissionsources.3. The plan has been approved as part of a State implementation plan or title Vpermit.


The Permittee shall maintain a current copy of the fugitive dust emissions controlplan onsite, and it shall be available for inspection upon request. The Permitteeshall keep the plan for the life of the affected source or until the affected source isno longer subject to the requirements of this subpart.

40 CFR Section 63.9591(d); 40 CFR Section63.9635(b); Minn. R. 7011.8030

At all times, including periods of startup, shutdown and malfunction, the Permitteeshall operate and maintain the emission unit(s) subject to 40 CFR pt. 63, subp.RRRRR, including air pollution control and monitoring equipment, in a mannerconsistent with good air pollution control practices for minimizing emissions at leastto the levels required by 40 CFR Section 63.6(e)(1)(i).


Operation and Maintenance Plan: Prepare, and at all times operate according to, awritten operation and maintenance (O&M) plan for each control device used forcompliance with any particulate matter emission limit in 40 CFR pt. 63, subp.RRRRR, Table 1 and to meet the requirement of each indurating furnace subject togood combustion practices (GCP). The O&M Plan shall contain the followingcomponents:1. Preventative maintenance for each control device;2. Corrective action procedures for bag leak detection systems;3. Corrective action procedures for continuous parametric monitoring systems(CPMS) for air pollution control devices except baghouses; and4. Good combustion practices for each indurating furnace.The permittee shall maintain a current copy of the O&M Plan onsite, and it must beavailable for inspection upon request.

40 CFR Section 63.9600(b); 40 CFR Section63.9625(a) and (b); 40 CFR Section 63.9636(b); Minn.R. 7011.8030

Preventative maintenance for each control device includes a preventativemaintenance schedule that is consistent with the manufacturer's instructions forroutine and long-term maintenance.

40 CFR Section 63.9600(b)(1); Minn. R. 7011.8030

CPMS corrective action procedures for all air pollution control devices exceptbaghouses: In the event that an established operating limit for an air pollutioncontrol device is exceeded, except for a baghouse, the Permittee shall initiatecorrective action to determine the cause of the operating limit exceedance andcomplete the corrective action within 10 calendar days. The corrective actionprocedures shall be consistent with the installation, operation, and maintenanceprocedures listing in the site-specific CPMS monitoring plan in accordance with 40CFR Section 63.9632(b).


Good combustion practices for indurating furnaces: Identify and implement a set ofsite-specific GCP for each type of indurating furnace at the facility. These GCPshould correspond to standard operating procedures for maintaining proper andefficient combustion within each indurating furnace. GCP include, but are notlimited to, the actions listed in 40 CFR Section 63.6900(b)(3)(i)-(v).



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-52

The Permittee shall be in compliance with the requirements in paragraphs (1)through (6) at all times, except during periods of startup, shutdown, and malfunctionas defined in 40 CFR Section 63.2.1. The emission limitations in 40 CFR Section 63.9590.2. The work practice standards in 40 CFR Section 63.9591.3. The operation and maintenance requirements in 40 CFR Section 63.9600. 4.The notification requirements in 40 CFR Section 63.9640. 5. The reportingrequirements in 40 CFR Section 63.9641.6. The recordkeeping requirements in 40 CFR Section 63.9642.


During the period between the compliance date specified for the affected source in40 CFR Section 63.9583 and the date upon which continuous monitoring systemshave been installed and certified and any applicable operating limits have been set,the Permittee shall maintain a log detailing the operation and maintenance of theprocess and emissions control equipment. This includes the daily monitoring andrecordkeeping of air pollution control device operating parameters as specified in40 CFR Section 63.9590(b).


The Permittee shall develop a written startup, shutdown, and malfunction planaccording to the provisions in 40 CFR Section 63.6(e)(3).


Performance test methods and other procedures: The Permittee shall conduct eachperformance test according to the requirements in section 40 CFR Section63.7(e)(1) and 40 CFR Section 63.9621(b) and (c) for purposes of Taconite MACT.


Operating limits may be changed for any air pollution control device as long as youmeet the requirements in paragraphs (f)(1) through (3) of this section.1. Submit a written notification to the Commissioner of your request to conduct anew performance test to revise the operating limit.2. Conduct a performance test to demonstrate compliance with the applicableemission limitation in Table 1 to this subpart.3. Establish revised operating limits according to the applicable procedures inparagraphs (a) through (e) of 40 CFR Section 63.9622.

40 CFR Section 63.9622(f); Minn. R. 7011.8030

For each CPMS required by 40 CFR Section 63.9631, the Permittee shall developand make available for inspection upon request a site-specific monitoring plan thataddress the following requirements:1. Installation of the CPMS sampling probe or other interface at a measurementlocation relative to each affected emission unit such that the measurement isrepresentative of control of the exhaust emissions (e.g., on or downstream of thelast control device).2. Performance and equipment specifications for the sample interface, theparametric signal analyzer, and the data collection and reduction system.3. Performance evaluation procedures and acceptance criteria (e.g., calibrations).4. Ongoing operation and maintenance procedures in accordance with the generalrequirements of 40 CFR Section 63.8(c)(1), (3), (4)(ii), (7), and (8).5. Ongoing data quality assurance procedures in accordance with 40 CFR Section63.8(d).(continued below)

40 CFR Section 63.9625(d); 40 CFR Section63.9632(b); Minn. R. 7011.8030

6. Ongoing recordkeeping and reporting procedures in accordance with 40 CFRSection 63.10(c), (e)(1), and (e)(2)(i).7. Corrective action procedures to be followed in the event an air pollution controldevice, except for a baghouse, exceeds an established operating limit as requiredin 40 CFR Section 63.9600(b)(3).

40 CFR Section 63.9625(d); 40 CFR Section63.9632(b); Minn. R. 7011.8030 (continued)

Unless otherwise specified, each CPMS shall meet the following requirements:1. Each CPMS shall complete a minimum of one cycle of operation for eachsuccessive 15-minute period and shall have valid data for at least 95 percent ofevery daily averaging period.2. Each CPMS shall determine and record the daily average of all recordedreadings.


The Permittee shall conduct a performance evaluation of each CPMS inaccordance with the site-specific monitoring plan.


The Permittee shall operate and maintain the CPMS in continuous operationaccording to the site-specific monitoring plan.


General Monitoring Requirements: except for monitoring malfunctions, associatedrepairs, and required quality assurance (calibrations, zero/span checks, etc.),monitoring shall be continuous at all times when the source is operating. ThePermittee shall not use data collected during malfunctions, repairs, and QA/QC tofulfill a data availability requirement or to assess compliance. The Permittee shalluse all the data collected during all other periods in assessing compliance.

40 CFR Section 63.9633; Minn. R. 7011.8030

If the daily average operating parameter value for an emission unit or group ofsimilar emission units does not meet the corresponding established operating limit,the Permittee must then follow the following procedures:(continued below)

40 CFR Section 63.9634(j); 40 CFR Section63.9641(e); Minn. R. 7011.8030


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-53

1. The Permittee must initiate and complete initial corrective action within 10calendar days and demonstrate that the initial corrective action was successful.During any period of corrective action, the Permittee must continue to monitor andrecord all required operating parameters for equipment that remains in operation.After 10 calendar days, measure and record the daily average operating parametervalue for the emission unit or group of similar emission units on which correctiveaction was taken. After the initial corrective action, if the daily average operatingparameter value for the emission unit or group of similar emission units meets theoperating limit established for the corresponding unit or group, then the correctiveaction was successful and the emission unit or group of similar emission units is incompliance with established operating limits and no reportable deviation occurred.

40 CFR Section 63.9634(j); 40 CFR Section63.9641(e); Minn. R. 7011.8030 (continued)

2. If the initial corrective action required in (1) was not successful, then thePermittee must complete additional corrective action within 10 calendar days anddemonstrate that the subsequent corrective action was successful. During anyperiod of corrective action, you must continue to monitor and record all requiredoperating parameters for equipment that remains in operation. After the second setof 10 calendar days allowed to implement corrective action, the Permittee mustagain measure and record the daily average operating parameter value for theemission unit or group of similar emission units. If the daily average operatingparameter value for the emission unit or group of similar emission units meets theoperating limit established for the corresponding unit or group, then the correctiveaction was successful and the emission unit or group of similar emission units is incompliance with established operating limits and no reportable deviation occurred.(continued below)


3. If the second attempt at corrective action required in paragraph (2) was notsuccessful, then the Permittee must repeat the procedures until the correctiveaction is successful. If the third attempt at corrective action is unsuccessful, thePermittee must conduct another performance test in accordance with theprocedures in 40 CFR section 63.9622(f) and report to the Commissioner as adeviation the third unsuccessful attempt at corrective action.4. After the third unsuccessful attempt at corrective action, the Permittee shallsubmit the written report required in (3) within 5 calendar days after the thirdunsuccessful attempt at corrective action. This report must notify the Commissionerthat a deviation has occurred and document the types of corrective measures takento address the problem that resulted in the deviation of established operatingparameters and the resulting operating limits.


The Permittee shall:1. Perform preventative maintenance for each control device in accordance with 40CFR section 63.9600(b)(1) and record all information needed to documentconformance with these requirements.2. Initiate and complete corrective actions for a bag leak detection system alarm inaccordance with 40 CFR section 63.9600(b)(2) and record all the informationneeded to document conformance with these requirements.3. Initiate and complete corrective actions for a CPMS when an establishedoperating limit for an air pollution control device, except for a baghouse, isexceeded in accordance with 40 CFR Section 63.9600(b)(3) and record allinformation needed to document conformance with these requirements.4. Implement and maintain site-specific GCP for each indurating furnace inaccordance with 40 CFR Section 63.9600(b)(4) and record all information neededto document conformance with these requirements.


Deviations. The Permittee shall report each instance in which an emission limitationwas not met. This includes periods of startup, shutdown, and malfunction.The Permittee shall report each instance in which a work practice standard in 40CFR section 63.9591 was not met. The Permittee must report each instance inwhich an applicable operation and maintenance requirement in 40 CFR section63.9600 was not met. These deviations must be reported in accordance with therequirements in 40 CFR section 63.9641.

Deviations that occur during a period of startup, shutdown, or malfunction are notviolations if you demonstrate to the Commissioner's satisfaction that you wereoperating in accordance with 40 CFR Section 63.6(e)(1).

40 CFR Section 63.9637(a), and (b); Minn. R.7011.8030

Semiannual Compliance Report: due 30 days after end of each calendar half-yearfollowing Permit Issuance.

The facility shall submit semi-annual compliance reports for the Taconite MACT.The report covering the period from January 1 through June 30 is due on July 30.The report covering the period from July 1 through December 31 is due on January30. The report shall contain the information required by 40 CFR Section63.9641(b)(1)-(8).

This report may be submitted in conjunction with the startup, shutdown andmalfunction report required by 40 CFR Section 63.10(d)(5)(i).

40 CFR Section 63.9641(a) and (b); 40 CFR Section63.10(d)(5)(i); Minn. R. 7011.8030


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-54

Immediate startup, shutdown, and malfunction report. Any time an action taken bythe Permittee during a startup or shutdown or malfunction (that caused the sourceto exceed any applicable emission limitation in the relevant emission standards),that is not consistent with the procedures specified in the affected source's SSMPlan, the Permittee shall report the actions taken for that event within 2 workingdays after commencing the actions followed by a letter within 7 working days afterthe end of the event. The reports must be in accordance with 40 CFR Section63.10(d)(5)(ii). The report shall include: (1) Certification of accuracy of report by aresponsible official; (2) Explanation of circumstances of the event; (3) Reasons fornot following the SSM Plan; (4) Description of all excess emissions and/or CPMSmonitoring exceedences which have occurred; and (5) Actions taken to minimizeemissions in conformance with 40 CFR Section 63.6(e)(1)(i).

40 CFR Section 63.9641(c); 40 CFR Section63.10(d)(5)(ii); 40 CFR Section 63.6(e)(3)(iv); Minn. R.7011.8030; Minn. R. 7019.0100, subp. 2

Part 70 monitoring report. The Permittee shall report all deviations as defined in thissubpart in the semiannual monitoring report required by 40 CFR 70.6(a)(3)(iii)(A) or40 CFR 71.6(a)(3)(iii)(A). If you submit a compliance report for an affected sourcealong with, or as part of, the semiannual monitoring report required by 40 CFR70.6(a)(3)(iii)(A) or 40 CFR 71.6(a)(3)(iii)(A), and the compliance report includes allthe required information concerning deviations from any emission limitation oroperation and maintenance requirement in this subpart, submission of thecompliance report satisfies any obligation to report the same deviations in thesemiannual monitoring report. However, submission of a compliance report doesnot otherwise affect any obligation you may have to report deviations from permitrequirements for an affected source to your permitting authority.


Recordkeeping. The Permittee shall keep the following records: 1. A copy of eachnotification and report that you submitted to comply with 40 CFR part 63, subpartRRRRR 2. The records in 40 CFR section 63.6(e)(3)(iii) through (v) related tostartup, shutdown, and malfunction. 3. Records of performance tests andperformance evaluations as required in 40 CFR section 63.10(b)(2)(viii). 4.Records required by 40 CFR Sections 63.9634 through 63.9636 to showcontinuous compliance with each applicable emission limitation, work practicestandard, and operation and maintenance requirement.

40 CFR Section 63.9642(a) and (c); Minn. R.7011.8030

Bag leak detection system corrective action procedures: In the event a bag leakdetection system alarm is triggered, the Permittee shall initiate corrective action todetermine the cause of the alarm within 1 hour of the alarm, initiate correctiveaction to correct the cause of the problem within 24 hours of the alarm, andcomplete the corrective action as soon as practicable. Corrective actions mayinclude, but are not limited to the actions listed in 40 CFR Section63.9600(b)(2)(i)-(vi).


Install, operate, and maintain a bag leak detection system to monitor the relativechange in particulate matter loadings according to the requirements in 40 CFRSection 63.9632(a), and conduct inspections at their specified frequenciesaccording to the following requirements:1. Monitor the pressure drop across each baghouse cell each day to ensurepressure drop is within the normal operating range.2. Confirm that dust is being removed from hoppers through weekly visualinspections or other means of ensuring the proper functioning of removalmechanisms.3. Check the compressed air supply of pulse-jet baghouses each day.4. Monitor cleaning cycles to ensure proper operation using an appropriatemethodology.5. Check bag cleaning mechanisms for proper functioning through monthly visualinspections or equivalent means.6. Make monthly visual checks of bag tension on reverse air and shaker-typebaghouses.(continued below)


7. Confirm the physical integrity of the baghouse through quarterly visualinspections of the baghouse interior for air leaks.8. Inspect fans for wear, material buildup, and corrosion through quartely visualinspections, vibration detectors, or equivalent means.

40 CFR Section 63.9631(a); Minn. R. 7011.8030(continued)

Bag Leak Detection System Requirements: Each negative or positive pressurebaghouse equipped with a stack used for compliance with the Taconite MACT shallmeet the following requirements:1. The system shall be certified by the manufacturer to be capable of detectingemissions of particulate matter at concentrations of 10 milligrams per actual cubicmeter (0.0044 grains per actual cubic foot) or less.2. The system shall provide output of relative changes in particulate matter loadings3. The system shall be equipped with an alarm that will sound when an increase inrelative particulate loadings is detected over the alarm level set point establishedaccording to paragraph (a)(4) of this section. The alarm shall be located such that itcan be heard by the appropriate plant personnel.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-55

Bag Leak Detection System Monitoring Plan: For each baghouse used forcompliance with the Taconite MACT, develop and implement a Bag Leak DetectionSystem Monitoring Plan. The plan shall be submitted to MPCA for approval. Theplan shall describe: 1. Installation of the bag leak detection system; 2. Initial andperiodic adjustment of the bag leak detection system including how the alarmset-point will be established. 3. Operation of the bag leak detection systemincluding quality assurance procedures. 4. How the bag leak detection system willbe maintained including a routine maintenance schedule and spare parts inventorylist.5. How the bag leak detection system output shall be recorded and stored.


To make the initial adjustment of the system, establish the baseline output byadjusting the sensitivity (range) and the averaging period of the device. Then,establish the alarm set points and the alarm delay time (if applicable). Following initial adjustment, do not adjust averaging period, alarm set point, oralarm delay time, without approval from the Commissioner except as provided for inparagraph (a)(6)(i) of this section. 1. Once per quarter, you may adjust thesensitivity of the bag leak detection system to account for seasonal effects,including temperature and humidity, according to the procedures identified in thesite-specific monitoring plan required under paragraph (a)(4) of this section.

Where multiple detectors are required, the system's instrumentation and alarm maybe shared among detectors.

The bag leak detector sensor must be installed downstream of the baghouse andupstream of any wet scrubber.


PT. 63, SUBP. A GENERAL REQUIREMENTS hdr

Circumvention. The Permittee shall not build, erect, install, or use any article,machine, equipment, or process to conceal an emission that would otherwiseconstitute noncompliance with a relevant standard. Such concealment includes, butis not limited to:1. The use of diluents to achieve compliance with a relevant standard based on theconcentration of a pollutant in the effluent discharged to the atmosphere.


After the effective date of any relevant standard promulgated under 40 CFR pt. 63,equipment added (or a process change) to an affected source that is within thescope of the definition of affected source under the relevant standard shall beconsidered part of the affected source and subject to all provisions of the relevantstandard established for that affected source.


Proper Operation and Maintenance. At all times, including periods of startup,shutdown, and malfunction, the Permittee shall operate and maintain the emissionunit subject to the MACT standard and any associated air pollution controlequipment and monitoring equipment, in a manner consistent with safety and goodair pollution control practices for minimizing emissions.

40 CFR Section 63.6(e)(1)(i); Minn. R. 7011.7000

Malfunctions shall be corrected as soon as practicable after their occurrence. 40 CFR Section 63.6(e)(1)(ii); Minn. R. 7011.7000

Startup, shutdown, and malfunction plan (SSMP). The Permittee shall develop awritten SSMP that describes, in detail, procedures for operating and maintainingthe source during periods of startup, shutdown, and malfunction; and a program ofcorrective action for malfunctioning process, air pollution control, and monitoringequipment used to comply with the relevant standard. The plan requirements arefurther described in 40 CFR Section 63.6(e)(3)(i).

40 CFR Section 63.6(e)(3)(i), 40 CFR Section63.8(c)(1)(iii); Minn. R. 7011.7000

When actions taken by Permittee during a startup or shutdown (and the startup orshutdown causes the source to exceed any applicable emission limitation), ormalfunction (including actions taken to correct a malfunction) are consistent withthe procedures specified in the affected source's SSMP, the Permittee shall keeprecords which demonstrate that the procedures specified in the SSMP werefollowed and describes the actions taken for that event.

40 CFR Section 63.6(e)(3)(iii) ; Minn. R. 7011.7000

If an action taken by the Permittee during a startup, shutdown, or malfunction(including an action taken to correct a malfunction) is not consistent with theprocedures specified in the affected source's SSMP, and the source exceeds anyapplicable emission limitation in the relevant emission standard, then the Permitteeshall record the actions taken for that event and shall report such actions asspecified in 40 CFR Section 63.10(d)(5).

40 CFR Section 63.6(e)(3)(iv) ; Minn. R. 7011.7000

The Permittee shall maintain at the affected source a current SSMP and shall makethe plan available upon request for inspection and copying by the Commissionerand the Administrator. In addition, if the SSMP is subsequently revised, thePermittee shall maintain at the affected source each previous (i.e., superseded)version of the SSMP, and shall make each such previous version available forinspection and copying for a period of 5 years after revision of the SSMP.

40 CFR Section 63.6(e)(3)(v); Minn. R. 7011.7000


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-56

To satisfy the requirements of this section to develop a SSMP, the Permittee mayuse a standard operating procedures (SOP) manual, or other plan, provided thealternative plans meet all the requirements and are made available for inspection orsubmission.

40 CFR Section 63.6(e)(3)(vi ); Minn. R. 7011.7000

The Commissioner or the Administrator may require that a Permittee makechanges to the SSMP. Revisions to the SSMP will be required if the plan:1) Does not address a startup, shutdown, or malfunction event that has occurred;2) Fails to provide for the operation of the source (including associated air pollutioncontrol and monitoring equipment) during a startup, shutdown, or malfunction eventin a manner consistent with the general duty to minimize emissions established by40 CFR Section 63.6(e)(1)(i);3) Does not provide adequate procedures for correcting malfunctioning processand/or air pollution control and monitoring equipment as quickly as practicable; or4) Includes an event that does not meet the definition of startup, shutdown, ormalfunction listed in 40 CFR Section 63.2.

40 CFR Section 63.6(e)(3)(vii) ; Minn. R. 7011.7000

The Permittee may periodically revise the SSMP as necessary to satisfy therequirements of 40 CFR subp. A or to reflect changes in equipment or proceduresat the affected source. Each such revision to a SSMP shall be reported in thesemiannual report required by 40 CFR Section 63.10(d)(5). If the SSMP fails toaddress or inadequately addresses an event that meets the characteristics of amalfunction but was not included in the SSMP, the Permittee shall revise the SSMPwithin 45 days after the event in accordance with 40 CFR Section 63.6(e)(3)(viii).

40 CFR Section 63.6(e)(3)(viii); Minn. R. 7011.7000

Any revisions made to the SSMP shall not be deemed to constitute permit revisionsunder 40 CFR pt. 70 or pt. 71 and elements of the SSMP shall not be consideredan applicable requirement as defined by p.t 70 or pt. 71.

40 CFR Section 63.6(e)(3)(ix);Minn. R. 7011.7000

Applicability. The non-opacity emission standards set forth in 40 CFR Section63.6(f)(1)-(3) shall apply at all times except during periods of startup, shutdown,and malfunction, and as otherwise specified in 40 CFR pt. 63, subp. RRRRR.

40 CFR Section 63.6(f)(1); Minn. R. 7011.7000

Methods for determining compliance will be, in part, based on the results ofperformance tests, conformance with operation and maintenance requirements,review of records, and inspection of the source as specified in 40 CFR Section63.6(f)(2).The Permittee many use the results of performance testing conducted previously ifit meets the requirements of 40 CFR Section 63.6(f)(iii).


Finding of compliance. The Commissioner or the Administrator will make a findingconcerning an affected source's compliance with a non-opacity emission standardupon obtaining all the compliance information required by the relevant standard andother information available to the Commissioner or the Administrator pursuant to 40CFR Section 63.6(e)(1)(i).


Notification of performance test.1) The Permittee shall notify the Commissioner and the Administrator of theirintention to conduct a performance test at least 60 calendar days before theperformance test is initially scheduled to begin.2) In the event the Permittee is unable to conduct the performance test on the datespecified due to unforeseeable circumstances, the Permittee shall notify theCommissioner and the Administrator as soon as practicable and without delay priorto the scheduled performance test date and specify the date when the performancetest is rescheduled.

40 CFR Section 63.7(b); 40 CFR Section 63.9(e);Minn. R. 7017.2015; Minn. R. 7019.0100

Submission of site-specific test plan. Before conducting a required performancetest, the Permittee shall develop and, if requested by the Commissioner or theAdministrator, shall submit a site-specific test plan for approval in accordance withthe requirements of 40 CFR Section 63.7(c)(2).

40 CFR Section 63.7(c)(2); Minn. R. 7017.2015

Approval of site-specific test plan. The Administrator will notify the Permittee ofapproval or intention to deny approval of the site-specific test plan (if review of thesite-specific test plan is requested) within 30 calendar days after receipt of theoriginal plan and within 30 calendar days after receipt of any supplementaryinformation.

40 CFR Section 63.7(c)(3); Minn. R. 7017.2015

Performance testing facilities. The Permittee, at the request of the Commissioner orthe Administrator, shall provide performance testing facilities as specified in 40CFR Section 63.7(d).



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-57

Conduct of performance tests.1) Performance tests shall be conducted under conditions based on representativeperformance (i.e., based on normal operating conditions) of the affected source.Operations during periods of startup, shutdown, and malfunction shall not constituterepresentative conditions for the purpose of a performance test, nor shall emissionsin excess of the relevant standard during periods of startup, shutdown, andmalfunction be considered a violation of the relevant standards unless adetermination of noncompliance is made under Section 63.6(e).2) Performance tests shall be conducted and data shall be reduced in accordancewith the test methods and procedures set forth in 40 CFR Section 63.7(e), in eachrelevant standard, and in applicable appendices of 40 CFR parts 51, 60, 61. TheCommissioner has delegation to approve a minor or intermediate modification to areference method or specified monitoring procedure as allowed by 40 CFR Section63.7(e)(i) and (ii).

40 CFR Section 63.7(e)(1)-(2); Minn. R. 7017.2015

Unless otherwise specified in a relevant standard or test method, eachperformance test shall consist of three separate runs using the applicable testmethod. Each run shall be conducted for the time and under the conditionsspecified in the relevant standard. For the purpose of determining compliance witha relevant standard, the arithmetic mean of the results of the three runs shall apply,unless otherwise approved in accordance with provisions of 40 CFR Section63.7(e)(3).

40 CFR Section 63.7(e)(3); Minn. R. 7017.2015

Data analysis, recordkeeping, and reporting. Unless otherwise specified in arelevant standard or test method, or as otherwise approved by the Commissioneror Administrator in writing, results of a performance test shall include the analysis ofsamples, determination of emissions, and raw data. A performance test iscompleted when field sample collection is terminated. The Permittee shall reportthe results of the performance test to the Commissioner or Administrator before theclose of business on the 60th day following the completion of the performance test,unless specified otherwise in a relevant standard or as approved otherwise inwriting. The results of the performance test shall be submitted as part of thenotification of compliance status required under 40 CFR Section 63.9(h) to theappropriate permitting authority.

40 CFR Section 63.7(g); Minn. R. 7017.2015

All CMS required under relevant standards shall be subject to the provisions of 40CFR Section 63.8 upon promulgation of performance specifications for CMS asspecified in the relevant standard or otherwise by the Administrator.


Conduct of monitoring. Monitoring shall be conducted as set forth in 40 CFRSection 63.8(b)(1).


When the emissions from two or more affected sources are combined before beingreleased to the atmosphere, the Permittee may install an applicable CMS for eachemission stream or for the combined emissions streams, provided the monitoring issufficient to demonstrate compliance with the relevant standard unless otherwisestated in 40 CFR Section 63.8(b)(2).


Operation and maintenance of continuous monitoring systems. The Permittee shallmaintain and operate each CMS in a manner consistent with good air pollutioncontrol practices.1) The Permittee shall keep the necessary parts for routine repairs of the affectedCMS equipment readily available.2) The Permittee shall ensure the read out, or other indication of operation, fromany CMS required for compliance with the emission standard is readily accessibleon site for operational control or inspection.3) All CMS shall be installed, operational, and the data verified prior to or inconjunction with conducting performance tests. Verification of operational statusshall, at a minimum, include completion of the manufacturer's written specificationsor recommendations for installation, operation, and calibration of the system.(continued below)

40 CFR Section 63.8(c)(1)-(3), and (7)-(8); Minn. R.7017.1010

4) A CMS is out of control if:i) The zero (low-level), mid-level (if applicable), or high-level calibration drift (CD)exceeds two times the applicable CD specification in the applicable performancespecification or in the relevant standard; orii) The CMS fails a performance test audit (e.g., cylinder gas audit), relativeaccuracy audit, relative accuracy test audit, or linearity test audit; or5) The Permittee shall submit all information concerning out-of-control periods,including start and end dates and hours and descriptions of corrective actionstaken, in the excess emissions and continuous monitoring system performancereport.

40 CFR Section 63.8(c)(1)-(3), and (7)-(8); Minn. R.7017.1010 (continued)


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-58

When the CMS is out of control, the Permittee shall take the necessary correctiveaction and shall repeat all necessary tests which indicate that the system is out ofcontrol until the performance requirements are below the applicable limits. Thebeginning of the out-of-control period is the hour the Permittee conducts aperformance check (e.g., calibration drift) that indicates an exceedance of theperformance requirements established under this part. The end of the out-of-controlperiod is the hour following the completion of corrective action and successfuldemonstration that the system is within the allowable limits. During the period theCMS is out of control, recorded data shall not be used in data averages andcalculations, or to meet any data availability requirement.

40 CFR Section 63.8(c)(7)(ii); Minn. R. 7017.1010

The Permittee shall develop and implement a CMS quality control program. As partof the quality control program, the Permittee shall develop and submit to theCommissioner or Administrator for approval upon request a site-specificperformance evaluation test plan for the CMS performance evaluation required in40 CFR Section 63.8(e)(3)(i). Each quality control program shall include, at aminimum, a written protocol that describes procedures for each of the followingoperations:i) Initial and any subsequent calibration of the CMS;ii) Determination and adjustment of the calibration drift of the CMS;iii) Preventive maintenance of the CMS, including spare parts inventory;iv) Data recording, calculations, and reporting;v) Accuracy audit procedures, including sampling and analysis methods; andvi) Program of corrective action for a malfunctioning CMS.(continued below)


The Permittee shall keep these written procedures on record for the life of theaffected source, to be made available for inspection, upon request. The Permitteeshall keep previous versions of the performance evaluation plan on record to bemade available for inspection upon request, for a period of 5 years after eachrevision to the plan. Written procedures may be incorporated into the SSMP toavoid duplication of planning and recordkeeping efforts.

40 CFR Section 63.8(d); Minn. R. 7017.1010(continued)

Performance evaluation of continuous monitoring systems

1) When required by a relevant standard, and at any other time the Administratormay require, the Permittee shall conduct a performance evaluation of the CMSaccording to the applicable specifications and procedures described in 40 CFRSection 63.8(e) or in the relevant standard.

2) Reporting performance evaluation results. The Permittee shall furnish theCommissioner and the Administrator a copy of a written report of the results of theperformance evaluation simultaneously with the results of the performance test orwithin 60 days of completion of the performance evaluation if no test is required,unless otherwise specified in a relevant standard.


Reduction of monitoring data. The Permittee shall reduce the monitoring data asspecified in 40 CFR Section 63.8(g)(1)-(4).

40 CFR Section 63.8(g); Minn. R. 7017.1010

Additional notification requirements for sources with CMS. The Permittee shallsubmit to the Commissioner and the Administrator written notification as follows:1) A notification of the date the CMS performance evaluation under 40 CFR Section63.8(e) is scheduled to begin, submitted simultaneously with the notification of theperformance test date required under 40 CFR Section 63.7(b). If no performancetest is required, or if the requirement to conduct a performance test has beenwaived, the Permittee shall notify the Commissioner and the Administrator in writingof the date of the performance evaluation at least 60 calendar days before theevaluation is scheduled to begin;(continued below)

40 CFR Section 63.9(g), 40 CFR Section 63.8(e), 40CFR Section 63.10(e)(2); Minn. R. 7017.1010, Minn.R. 7019.0100

2) A notification that the criterion necessary to continue use of an alternative torelative accuracy testing, as provided by 40 CFR Section 63.8(f)(6), has beenexceeded. The notification shall be delivered or postmarked no later than 10 daysafter the occurrence of such exceedance, and it shall include a description of thenature and cause of the increased emissions.

40 CFR Section 63.9(g), 40 CFR Section 63.8(e), 40CFR Section 63.10(e)(2); Minn. R. 7017.1010, Minn.R. 7019.0100 (continued)

Notification of compliance status.Each time a notification of compliance status is required under 40 CFR pt. 63,subp. A, the Permittee shall submit to the Commissioner a notification ofcompliance status containing the information required by 40 CFR Section 63.9(h),signed by the responsible official who shall certify its accuracy, attesting to whetherthe source has complied with the relevant standard.The notification shall be sent by the 60th day following the completion of therelevant compliance demonstration activity specified in the relevant standard.

40 CFR Section 63.9(h); Minn. R. 7019.0100

Notification. Any change in the information already provided under 40 CFR Section63.9 shall be provided to the Commissioner and the Administrator in writing within15 calendar days after the change.

40 CFR Section 63.9(j); Minn. R. 7019.0100


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-59

The Permittee shall submit reports to the Commissioner and shall send a copy ofeach report to the Administrator.


Recordkeeping. The Permittee shall maintain files of all information (including allreports and notifications) required by 40 CFR pt. 63 in a form suitable and readilyavailable for expeditious inspection and review. The files shall be retained for atleast 5 years following the date of each occurrence, measurement, maintenance,corrective action, report, or record. At a minimum, the most recent 2 years of datashall be retained on site.

40 CFR Section 63.10(b)(1); Minn. R. 7019.0100,subp. 2(B)

The Permittee shall maintain, at a minimum, the following records:1) the occurrence and duration of each startup or shutdown, when the startup orshutdown causes the source to exceed any applicable emission limitation in therelevant emission standard;2) the occurrence and duration of each malfunction of the process equipment or ofthe air pollution control equipment and monitoring equipment;3) all maintenance performed on the pollution control equipment;4) actions taken during periods of startup or shutdown when the source exceededapplicable emission limitations in a relevant standard and when such actions aredifferent from the procedures specified in the affected source's startup, shutdown,and malfunction plan (SSMP).(continued below)

40 CFR Section 63.10(b)(2); Minn. R. 7019.0100,subp. 2(B)

5) actions taken during periods of malfunction (including corrective actions torestore malfunction process and air pollution control and monitoring equipment toits normal or usual manner of operation) when the actions taken are different fromthe procedures specified in the SSMP;6) all information necessary to demonstrate conformance with the affected source'sSSMP and actions taken in accordance with SSMP;7) each period during which a continuous monitoring system (CMS) ismalfunctioning or inoperative;8) all required measurements needed to demonstrate compliance with a relevantstandard;9) all results of performance test, CMS performance evaluations,10) all measurements as may be necessary to determine the conditions ofperformance tests and performance evaluations;11) all CMS calibration checks;12) all adjustments and maintenance performed on CMS;(continued below)

40 CFR Section 63.10(b)(2); Minn. R. 7019.0100,subp. 2(B) (continued)

13) any information demonstrating whether a source is meeting the requirementsfor a waiver of record keeping or reporting requirements under this part;14) all documents supporting initial notifications and notifications of compliancestatus.

40 CFR Section 63.10(b)(2); Minn. R. 7019.0100,subp. 2(B) (continued)

Periodic startup, shutdown, and malfunction reports. If actions taken by a Permitteeduring a startup or shutdown (and the startup or shutdown causes the source toexceed any applicable emission limitation in the relevant emission standards), ormalfunction of an affected source (including actions taken to correct a malfunction)are consistent with the procedures specified in the source's startup, shutdown, andmalfunction plan, the Permittee shall state such information in a startup, shutdown,and malfunction report.Actions taken to minimize emissions during such startups, shutdowns, andmalfunctions shall be summarized in the report and may be done in checklist form.(continued below)

40 CFR Section 63.10(d)(5)(i); Minn. R. 7019.0100

Such a report shall also include the number, duration, and a brief description foreach type of malfunction which occurred during the reporting period and whichcaused or may have caused any applicable emission limitation to be exceeded.Reports shall only be required if a startup or shutdown caused the source toexceed any applicable emission limitation, or if a malfunction occurred during thereporting period. The startup, shutdown, and malfunction report shall consist of aletter, containing the name, title, and signature of the Permittee who is certifying itsaccuracy, that shall be submitted to the Commissioner and the Administratorsemiannually.

40 CFR Section 63.10(d)(5)(i); Minn. R. 7019.0100(continued)

Startup, shutdown, and malfunction report: due 30 days following the end of eachcalendar half year. The Permittee may submit this simultaneously with the excessemissions and continuous monitoring system performance (or other) reports. ThePermittee may request approval to reduce the frequency of reporting following theprocedures specified in 40 CFR Section 63.10(e)(3).

40 CFR Section 63.10(d)(5)(i); Minn. R. 7019.0100


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-60

Immediate startup, shutdown, and malfunction reports. Notwithstanding theallowance to reduce the frequency of reporting for periodic startup, shutdown, andmalfunction reports, any time an action taken by a Permittee during a startup orshutdown that caused the source to exceed any applicable emission limitation inthe relevant emission standards, or malfunction is not consistent with theprocedures specified in the affected source's SSMP, the Permittee shall report theactions taken for that event within 2 working days after commencing actionsinconsistent with the plan followed by a letter within 7 working days after the end ofthe event.(continued below)

40 CFR Section 63.10(d)(5)(ii); Minn. R. 7019.0100,subp. 2(B)

The immediate report required under this paragraph (d)(5)(ii) shall consist of atelephone call (or facsimile (FAX) transmission) to the Commissioner and theAdministrator within 2 working days after commencing actions inconsistent with theplan, and it shall be followed by a letter, delivered or postmarked within 7 workingdays after the end of the event. The report shall contain the information specified in40 CFR Section 63.10(d)(5)(ii).

40 CFR Section 63.10(d)(5)(ii); Minn. R. 7019.0100,subp. 2(B) (continued)

Excess emissions and continuous monitoring system performance report andsummary report. Excess emissions and parameter monitoring exceedances aredefined in relevant standards. The Permittee shall submit an excess emissions andcontinuous monitoring system performance report and/or a summary report to theCommissioner and the Administrator semiannually except when more frequentreporting is specifically required by a relevant standard or a reduction in frequencyis approved pursuant to 40 CFR Section 63.10(e)(3).

40 CFR Section 63.10(e)(3)(i)-(iv); Minn. R. 7019.0100

Content and submittal dates for excess emissions and monitoring systemperformance reports. All excess emissions and monitoring system performancereports and all summary reports, if required, shall be delivered or postmarked bythe 30th day following the end of each calendar half. Written reports of excessemissions or exceedances of process or control system parameters shall includeall the information required in 40 CFR Section 63.10(c)(5)- (c)(13), in 40 CFRSection 63.8(c)(7) and 40 CFR Section 63.8(c)(8), and in the relevant standard,and they shall contain the name, title, and signature of the responsible official whois certifying the accuracy of the report. When no excess emissions or exceedancesof a parameter have occurred, or a CMS has not been inoperative, out of control,repaired, or adjusted, such information shall be stated in the report.

40 CFR Section 63.10(e)(3)(v); Minn. R. 7019.0100

Summary report. One summary report shall be submitted for the hazardous airpollutants monitored at each affected source (unless the relevant standardspecifies that more than one summary report is required. The summary report shallbe entitled 'Summary Report - Gaseous and Opacity Excess Emission andContinuous Monitoring System Performance' and shall contain the informationspecified in 40 CFR Section 63.10(e)(3)(vi).

40 CFR Section 63.10(e)(3)(vi); Minn. R. 7019.0100

If the total duration of excess emissions or process or control system parameterexceedances for the reporting period is 1 percent or greater of the total operatingtime for the reporting period, or the total CMS downtime for the reporting period is 5percent or greater of the total operating time for the reporting period, both thesummary report and the excess emissions and continuous monitoring systemperformance report shall be submitted.

40 CFR Section 63.10(e)(3)(vii); Minn. R. 7019.0100


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-61

Subject Item: EU 001 Power Boiler 1 - Boiler



CE 281 Overfire Air

GP 001 Power Boilers

MR 001 Opacity for EU 001




Total Particulate Matter: less than or equal to 0.6 lbs/million Btu heat input . Minn. R. 7011.0510, subp. 1

PM < 10 micron: less than or equal to 0.036 grains/dry standard cubic foot . Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000

Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity.

Minn. R. 7011.0510, subp. 2

Sulfur Dioxide: less than or equal to 4.0 lbs/million Btu heat input when burningcoal.

Minn. R. 7011.0510, subp. 1

Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when burningdistillate fuel oil.

Minn. R. 7011.0510, subp. 1

Sulfur Dioxide: less than or equal to 2.5 lbs/million Btu heat input using 1-HourAverage when burning coal. The Permittee shall restrict the sulfur content of coalso that emissions of SO2 do not exceed this threshold. This Title 1 condition ismore stringent than the limit prescribed by Minn. R. 7011.0510, subp. 1 which alsoapplies.


Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input using 3-hourBlock Average when burning coal. The Permittee shall restrict the sulfur content ofcoal so that emissions of SO2 do not exceed this threshold. This Title 1 condition ismore stringent than the limit prescribed by Minn. R. 7011.0510, subp. 1 which alsoapplies.




Sulfur Dioxide: less than or equal to 1.5 lbs/million Btu heat input using AnnualAverage when burning coal. The Permittee shall restrict the sulfur content of coalso that emissions of SO2 do not exceed this threshold. This Title 1 condition ismore stringent than the limit prescribed by Minn. R. 7011.0510, subp. 1 which alsoapplies.


Sulfur Dioxide: less than or equal to 0.5 lbs/million Btu heat input when burningdistillate fuel oil. The Permittee shall restrict the sulfur content of any grade ofcommercial fuel oil so that emissions of SO2 do not exceed this threshold. ThisTitle 1 condition is more stringent than the limit prescribed by Minn. R. 7011.0510,subp. 1 which also applies.


Carbon Monoxide: less than or equal to 0.042 lbs/million Btu heat input . Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000

Carbon Monoxide: less than or equal to 21.54 lbs/hour . Title I Condition: 40 CFR Section 52.21(k); Title ICondition: 40 CFR Section 52.21(j); Minn. R.7007.3000


Fuel Limits: The Permittee shall combust only natural gas, distillate fuel oil, or coalfor this unit.

Minn. R. 7007.0800, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-62

The Permittee shall conduct a tune-up of the boiler every five years to demonstratecontinuous compliance as specified below:

1. As applicable, inspect the burner, and clean or replace any components of theburner as necessary (the Permittee may delay the burner inspection until the nextscheduled unit shutdown). Units that produce electricity for sale may delay theburner inspection until the first outage, not to exceed 36 months from the previousinspection. At units where entry into a piece of process equipment or into a storagevessel is required to complete the tune-up inspections, inspections are requiredonly during planned entries into the storage vessel or process equipment;

2. Inspect the flame pattern, as applicable, and adjust the burner as necessary tooptimize the flame pattern. The adjustment should be consistent with themanufacturer's specifications, if available;

(continued below)

Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000

(continued from above)

3. Inspect the system controlling the air-to-fuel ratio, as applicable, and ensure thatit is correctly calibrated and functioning properly (the Permittee may delay theinspection until the next scheduled unit shutdown). Units that produce electricity forsale may delay the inspection until the first outage, not to exceed 36 months fromthe previous inspection;

4. Optimize total emissions of CO. This optimization should be consistent with themanufacturer's specifications, if available, and with any NOx requirement to whichthe unit is subject;

5. Measure the concentrations in the effluent stream of CO in parts per million, byvolume, and oxygen in volume percent, before and after the adjustments are made(measurements may be either on a dry or wet basis, as long as it is the same basisbefore and after the adjustments are made). Measurements may be taken using aportable CO analyzer; and

(continued below)



6. Maintain on-site and submit, if requested by the Administrator, an annual reportcontaining the information below:i. The concentrations of CO in the effluent stream in parts per million by volume,and oxygen in volume percent, measured at high fire or typical operating load,before and after the tune-up of the boiler;ii. A description of any corrective actions taken as a part of the tune-up; andiii. The type and amount of fuel used over the 12 months prior to the tune-up, butonly if the unit was physically and legally capable of using more than one type offuel during that period. Units sharing a fuel meter may estimate the fuel used byeach unit.


The Permittee must complete an initial tune-up no later than January 31, 2016. Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000

If the unit is not operating on the required date for a tune-up, the tune-up must beconducted within 30 calendar days of startup.



Initial Performance Test: due 270 days after Initial Startup of EU 001 followinginstallation of the low nitrogen oxide burner overfire air system to measure COemissions from EU 001.

Title I Condition: 40 CFR Section 52.21(k); Title ICondition: 40 CFR Section 52.21(j); Minn. R.7007.3000; Minn. R. 7017.2020, subp. 1

Performance Test: due 270 days after Initial Startup of EU 001 following installationof the low nitrogen oxide burner overfire air system to measure NOx emissionsfrom EU 001.

The currently used emission rate to verify is 0.27 lbs/MMBtu.

Minn. R. 7017.2020, subp. 1; Minn. R. 7005.0100,subp. 35a


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-63




CE 283 Overfire Air






Total Particulate Matter: less than or equal to 0.6 lbs/million Btu heat input . Minn. R. 7011.0510, subp. 1


Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity.

Minn. R. 7011.0510, subp. 2

Sulfur Dioxide: less than or equal to 4.0 lbs/million Btu heat input when burningcoal.

Minn. R. 7011.0510, subp. 1









Carbon Monoxide: less than or equal to 0.062 lbs/million Btu heat input . Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000

Carbon Monoxide: less than or equal to 47.81 lbs/hour . Title I Condition: 40 CFR Section 52.21(k); Title ICondition: 40 CFR Section 52.21(j); Minn. R.7007.3000


Fuel Limits: The Permittee shall combust only natural gas or coal for this unit. Minn. R. 7007.0800, subp. 2




(continued below)



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-64





(continued below)





The Permittee must complete an initial tune-up no later than January 31, 2016. Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000





Title I Condition: 40 CFR Section 52.21(k); Title ICondition: 40 CFR Section 52.21(j); Minn. R.7007.3000; Minn. R. 7017.2020, subp. 1



Minn. R. 7017.2020, subp. 1; Minn. R. 7005.0100,subp. 35a


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-65

Subject Item: EU 005 Coal Transfer & Coal Bunkers - Conveyor

Associated Items: SV 005 Coal Transfer & Bunkers




Total Particulate Matter: less than or equal to 0.0062 grains/dry standard cubic foot. This is more stringent than the limit prescribed by Minn. R. 7011.0710, subp. 1(A)which also applies.


Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735.

Minn. R. 7011.0710, subp. 1(A)

Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60% opacity. An exceedance of this opacity standardoccurs whenever any one-hour period contains two or more 6-minute periodsduring which the average opacity exceeds 20%, or whenever any one-hour periodcontains one or more 6-minute periods during which the average opacity exceeds60%.

Minn. R. 7011.0710, subp. 1(B)


Process monitoring: the visual emissions observer in the facility staff shall checkstack visible emissions (opacity) once daily using a Daily Visible EmissionChecklist.

Minn. R. 7007.0800, subps. 4, 5 & 14


The Permittee shall maintain each piece of control equipment according to themanufacturer's specification, shall conduct inspections, and maintaindocumentation of those actions as required by Minn. R. 7011.0075, subp. 2(A) to2(I).

Minn. R. 7011.0075, subp. 2

Pressure Drop: greater than or equal to 1.0 inches of water column and less than orequal to 6.0 inches of water column as determined during the June 7, 2011performance test, unless a new range is set pursuant to Minn. R. 7017.2025, subp.3 based on the values recorded during the most recent MPCA-approvedperformance test where compliance was demonstrated. The new range shall beimplemented upon receipt of the Notice of Compliance letter granting preliminaryapproval. The range is final upon issuance of a permit amendment incorporatingthe change. The Permittee shall record the pressure drop at least once every 24hours when in operation.

Minn. R. 7007.0800, subps. 2 and 14; Minn. R.7017.2025, subp. 3

Recordkeeping of Pressure Drop. The Permittee shall record the time and date ofeach pressure drop reading and whether or not the recorded pressure drop waswithin the range specified in this permit.

Minn. R. 7007.0800, subps. 4 and 5

Corrective Actions: The Permittee shall take corrective action as soon as possible ifany of the following occur:- visible emissions are observed;- the recorded pressure drop is outside the required operating range; or- the fabric filter or any of its components are found during the inspections to needrepair.Corrective actions shall return the pressure drop to within the permitted range,eliminate visible emissions, and/or include completion of necessary repairsidentified during the inspection, as applicable. Corrective actions include, but arenot limited to, those outlined in the O & M Plan for the fabric filter. The Permitteeshall keep a record of the type and date of any corrective action taken for eachfilter.

Minn. R. 7007.0800, subps. 4, 5, and 14


Initial Performance Test: due before 12/15/2005 to measure PM and PM10emissions.


Initial Performance Test: due before 12/15/2005 to measure opacity. Minn. R. 7017.2020, subp. 1


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-66

Subject Item: EU 043 West Storage Bin #12 - Silo/Bin

Associated Items: CE 043 Multiple Cyclone w/o Fly Ash Reinjection - Most Multiclones

SV 043 Conc Bin - Section 12 - Fluxstone






Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735.

Minn. R. 7011.0710, subp. 1(A)

Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. An exceedance of this opacitystandard occurs whenever any one-hour period contains two or more six-minuteperiods during which the average opacity exceeds 20%, or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60%.

Minn. R. 7011.0710, subp. 1(B)


Process monitoring: the visual emissions observer in the facility staff shall checkstack visible emissions (opacity) once daily using one or more Daily VisibleEmission Checklists.

Minn. R. 7007.0800, subps. 4, 5 & 14


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-67

Subject Item: EU 636 60A to 60B transfer and 5x12 screen - Screens



Opacity: less than or equal to 10 percent opacity for any Process FugitiveEmission. Note that, due to lack of a stack/vent associated with any indoorconveyor transfer point in EU 636, PM and Opacity limits specified in 40 CFR60.382(a) are not given for EU 636.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-68

Subject Item: EU 643 60 Conveyor - Conveyor

Associated Items: CE 285 Dust Suppression by Water Spray

GP 020 Taconite MACT - All Affected Sources


Moisture Content: greater than or equal to 1.5 percent based on an annual averagefor pellet handling and stockpiling operations.

Title I Condition: To avoid classification as majormodification under 40 CFR Section 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800,subp. 2

NSPS SUBP. LL REQUIREMENTS hdr

On and after the 60th day after achieving the maximum production rate, but notlater than 180 days after initial startup, the Permittee shall restrict process fugitiveemissions of Opacity: less than or equal to 10 percent opacity


The opacity limit applies at all times except during periods of startup, shutdown, ormalfunction.


Performance Test: due 180 days after Initial Startup but not to exceed 60 days afterachieving the maximum production rate at which EU643 will be operated. Testingshall measure opacity using Method 9 at a location in which emissions from EU643would be expected to vent to the atmosphere and in accordance with theprocedures in 40 CFR Section 60.11 or other method approved by MPCA in theperformance test plan approval.

40 CFR Section 60.384(a); 60 CFR Section 60.8(a);Minn. R. 7011.2700

MONITORING, RECORDKEEPING, AND REPORTING REQUIREMENTS hdr

Visible Emissions: The Permittee shall check EU643 at a location in whichemissions from EU643 would be expected to vent to the atmosphere once eachday of operation for any visible emissions from the conveyor transfer points duringdaylight hours while the unit is conveying taconite pellets.

For days when EU643 is not in operation, the Permittee shall record that EU643was not in operation that day.

Minn. R. 7007.0800, subp. 4

Recordkeeping: The Permittee shall keep a record of all visible emission checks,the date and time of the visible emissions check, whether or not any visibleemissions were observed and of any corrective actions taken.

Minn. R. 7007.0800, subp. 5

Monitoring: the Permittee shall perform monthly periodic inspections to check thatwater is flowing to discharge spray nozzles in the wet suppression system. ThePermittee shall initiate corrective action within 24 hours and complete correctiveaction as expediently as practical if the Permittee finds that water is not flowingproperly during an inspection of the water spray nozzles. The Permittee shallrecord each inspection of the water spray nozzles, including the date of eachinspection and any corrective actions taken.

Minn. R. 7007.0800, subp. 4

Corrective Actions: The Permittee shall take corrective actions listed in the FugitiveDust Control Plan when excess visible emissions are observed. The Permitteeshall keep a record of the type and date of any corrective action taken.

Minn. R. 7007.0800, subps. 4, 5, and 14

In addition to the monitoring and recordkeeping requirements listed at EU643, therequirements of 40 CFR Section 52.21(r)(6) apply to the pellet handlingmodification project including EU643 and all other units affected by the the pellethandling modification project. Detailed monitoring, recordkeeping, and reportingrequirements are located at the FC level of this permit.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-69

Subject Item: EU 644 I Conveyor - Conveyor
















Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subp. 5


Minn. R. 7007.0800, subp. 4

Corrective Actions: The Permittee shall take corrective actions listed in the FugitiveDust Control Plan when visible emissions are observed. The Permittee shall keep arecord of the type and date of any corrective action taken.

Minn. R. 7007.0800, subps. 4, 5, and 14




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-70

Subject Item: EU 645 J Conveyor - Conveyor
















Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subp. 5


Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subps. 4, 5, and 14




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-71

Subject Item: EU 646 New Conveyor - Conveyor
















Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subp. 5


Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subps. 4, 5, and 14




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-72

Subject Item: FS 013 Pellet handling - pellet discharged from bridge to yard: 64 to yard - Material Handling/Transfer/Storage


The requirements listed below apply to FS013f (conveyor transfer pile). Minn. R. 7007.0800, subp. 2


Title I Condition: To avoid classification as majormodification under 40 CFR Section 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800, subp. 2

Opacity: less than or equal to 10 percent Minn. R. 7011.0110

Visible Emissions: The Permittee shall check FS013f for any visible emissions onceeach day of operation during daylight hours.

Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subp. 5


Minn. R. 7007.0800, subps. 4, 5, and 14

The requirements of 40 CFR Section 52.21(r)(6) apply to the pellet handlingmodification project including FS013 and all other units affected by the pellethandling modification project. Detailed monitoring, recordkeeping, and reportingrequirements are located at the FC level of this permit.



07500003 - 010

Facility Name:

Permit Number:

02/05/15A-73

Subject Item: FS 016 Pellet reclaiming - (EU B2, B4, B5, B6 in Barr 97): Loader to H1, Loader to H2, H1 to 67, H2 to 67, 67 to


The requirements listed below apply to FS016h (front end loader activity). Minn. R. 7007.0800, subp. 2


Title I Condition: To avoid classification as majormodification under 40 CFR Section 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800, subp. 2

Opacity: less than or equal to 10 percent Minn. R. 7011.0110

Visible Emissions: The Permittee shall check FS016h for any visible emissionsonce each day of operation during daylight hours.

Minn. R. 7007.0800, subp. 4


Minn. R. 7007.0800, subp. 5


Minn. R. 7007.0800, subps. 4, 5, and 14




07500003 - 010

Facility Name:

Permit Number:

02/05/15A-74

Subject Item: MR 005 NOx monitor for SV266

Associated Items: CM 009 Furnace 5, EU634, NOx, ppm and lb/hr


SV 266 Fce 5 HE-WG #501;#502;#503


Installation Notification: due 60 days before installing the continuous emissionsmonitoring system. The notification shall include plans and drawings of the system.

Minn. R. 7017.1040, subp. 1

CEM Certification Test: due 120 days after Resuming Operation of Furnace 5.Follow the Performance Specifications listed in 40 CFR pt. 60, Appendix B.

Furnace 5 was reactivated September 1, 2010 and the CEM Certification Test wasdue by December 30, 2010. A test extension was submitted to extend the due dateto April 29, 2011. The certification test was completed on December 29, 2010.

Minn. R. 7017.1050, subp. 1

CEMS Certification Test Plan: due 30 days before CEMS Certification TestCEMS Certification Test Pretest Meeting: due 7 days before CEMS CertificationTestCEMS Certification Test Report: due 45 days after CEMS Certification TestCEMS Certification Test Report - Microfiche Copy: due 105 days after CEMSCertification TestThe Notification, Test Plan, and Test Report may be submitted in alternate formatas allowed by Minn. R. 7017.1120, subp. 2

Minn. R. 7017.1060, subps. 1-3; Minn. R. 7017.1080,subps. 1-4

CEMS Daily Calibration Drift (CD) Test: The CD shall be quantified and recorded atzero (low-level) and upscale (high-level) gas concentrations at least once daily.The CEMS shall be adjusted whenever the CD exceeds twice the specification of40 CFR pt. 60, Appendix B. 40 CFR pt. 60, Appendix F, shall be used to determineout-of-control periods for CEMS. Follow the procedures in 40 CFR pt. 60, AppendixF.

Minn. R. 7017.1170, subp. 3

Cylinder Gas Audit: due before end of each calendar half-year starting 12/29/2010,except that a CGA is not required during any calendar half year in which a RATAwas performed. The CGAs shall be conducted at least three months apart but nomore than eight months apart. A CGA shall be conducted according to theprocedures in 40 CFR pt. 60, Appendix F, Section 5.1.2. If the monitored emissionunit was operated for less than 24 hours during the calendar half year, a CGA is notrequired for that calendar half year.

Minn. R. 7017.1170, subp. 4

CEMS Relative Accuracy Test Audit (RATA): due before end of each calendar yearstarting 12/29/2010. A RATA is not required in any calendar year if a RATAconducted in the previous year demonstrated a relative accuracy value of less than15 percent or if the associated emissions unit operated less than 48 hours duringthe calendar year. If the exception is used, the next RATA shall be conductedduring the first half of the following calendar year. RATAs shall be conducted atleast 3 months apart and according to 40 CFR pt. 60, Appendix F, Section 5.1.1.

Minn. R. 7017.1170, subp. 5

Relative Accuracy Test Audit (RATA) Notification: due 30 days before CEMSRelative Accuracy Test Audit (RATA).

Minn. R. 7017.1180, subp. 2

Continuous Operation: CEMS must be operated and data recorded during allperiods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A CEMS must not be bypassed except in emergencies where failure tobypass would endanger human health, safety, or plant equipment.

Acceptable monitor downtime includes reasonable periods as listed in Items A, B,C and D of Minn. R. 7017.1090, subp. 2.

Minn. R. 7017.1090, subp. 1

Recordkeeping: The owner or operator must retain records of all CEMS monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

Minn. R. 7007.1130

QA Plan: Develop and implement a written quality assurance plan that coverseach CEMS. The plan shall be on site and available for inspection within 30 daysafter monitor certification. The plan shall contain all of the information required by40 CFR 60, App. F, section 3.

Minn. R. 7017.1170, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-75




SV 267 Fce 5 HE-WG #501;#502;#503



Minn. R. 7017.1040, subp. 1



Minn. R. 7017.1050, subp. 1




Minn. R. 7017.1170, subp. 3


Minn. R. 7017.1170, subp. 4


Minn. R. 7017.1170, subp. 5


Minn. R. 7017.1180, subp. 2



Minn. R. 7017.1090, subp. 1


Minn. R. 7007.1130


Minn. R. 7017.1170, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-76




SV 268 Fce 5 HE-WG #501;#502;#503



Minn. R. 7017.1040, subp. 1



Minn. R. 7017.1050, subp. 1




Minn. R. 7017.1170, subp. 3


Minn. R. 7017.1170, subp. 4


Minn. R. 7017.1170, subp. 5


Minn. R. 7017.1180, subp. 2



Minn. R. 7017.1090, subp. 1


Minn. R. 7007.1130


Minn. R. 7017.1170, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-77

Subject Item: MR 008 Flow monitor for SV266



SV 266 Fce 5 HE-WG #501;#502;#503


Installation Notification: due 60 days before installing the flow monitoring system.The notification shall include plans and drawings of the system.

Minn. R. 7017.1040, subp. 1

Flow Meter Certification Test: due 120 days after Resuming Operation of Furnace 5.Follow the Performance Specifications listed in 40 CFR pt. 60, Appendix B.

Furnace 5 was reactivated September 1, 2010 and the Flow Meter CertificationTest was due by December 30, 2010. A test extension was submitted to extend thedue date to April 29, 2011. The certification test was completed on December 29,2010.

Minn. R. 7017.1050, subp. 1

Flow Meter Daily Calibration Drift (CD) Test: The CD shall be quantified andrecorded at low and high flow rate at least once daily. The flow meter shall beadjusted whenever the CD exceeds twice the specification of 40 CFR pt. 60,Appendix B. 40 CFR pt. 60, Appendix F, shall be used to determine out-of-controlperiods for CEMS. Follow the procedures in 40 CFR pt. 60, Appendix F.

Minn. R. 7017.1170, subp. 3

Flow Meter Relative Accuracy Test Audit (RATA): due before end of each calendaryear starting 12/29/2010. A RATA is not required in any calendar year if a RATAconducted in the previous year demonstrated a relative accuracy value of less than15 percent or if the associated emissions unit operated less than 48 hours duringthe calendar year. If the exception is used, the next RATA shall be conductedduring the first half of the following calendar year. RATAs shall be conducted atleast 3 months apart and according to 40 CFR pt. 60, Appendix F, Section 5.1.1.

Minn. R. 7017.1170, subp. 5

Flow Meter Relative Accuracy Test Audit (RATA) Notification: due 30 days beforeFlow Meter Relative Accuracy Test Audit (RATA).

Minn. R. 7017.1180, subp. 2

Continuous Operation: The flow meter must be operated and data recorded duringall periods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A flow meter must not be bypassed except in emergencies where failureto bypass would endanger human health, safety, or plant equipment.


Minn. R. 7017.1090, subp. 1

Recordkeeping: The owner or operator must retain records of all flow monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

Minn. R. 7007.1130

QA Plan: Develop and implement a written quality assurance plan that coverseach flow meter. The plan shall be on site and available for inspection within30 days after initial flow meter RATA. The plan shall contain all of the informationrequired by 40 CFR 60, App. F, section 3.

Minn. R. 7017.1170, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-78




SV 267 Fce 5 HE-WG #501;#502;#503



Minn. R. 7017.1040, subp. 1



Minn. R. 7017.1050, subp. 1


Minn. R. 7017.1170, subp. 3


Minn. R. 7017.1170, subp. 5


Minn. R. 7017.1180, subp. 2



Minn. R. 7017.1090, subp. 1


Minn. R. 7007.1130


Minn. R. 7017.1170, subp. 2


07500003 - 010

Facility Name:

Permit Number:

02/05/15A-79




SV 268 Fce 5 HE-WG #501;#502;#503



Minn. R. 7017.1040, subp. 1



Minn. R. 7017.1050, subp. 1


Minn. R. 7017.1170, subp. 3


Minn. R. 7017.1170, subp. 5


Minn. R. 7017.1180, subp. 2



Minn. R. 7017.1090, subp. 1


Minn. R. 7007.1130


Minn. R. 7017.1170, subp. 2

TABLE B: SUBMITTALSFacility Name: Northshore Mining - Silver Bay

Permit Number: 07500003 - 010

02/05/15B-1

Also, where required by an applicable rule or permit condition, send to the Permit Document Coordinator notices of:- accumulated insignificant activities,- installation of control equipment,- replacement of an emissions unit, and- changes that contravene a permit term.

Send any application for a permit or permit amendment to:

Fiscal Services Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194

Each submittal must be postmarked or received by the date specified in the applicable Table. Those submittals required by parts7007.0100 to 7007.1850 must be certified by a responsible official, defined in Minn. R. 7007.0100, subp. 21. Other submittals shallbe certified as appropriate if certification is required by an applicable rule or permit condition.

Send submittals that are required by the Acid Rain Program to:

U.S. Environmental Protection Agency Clean Air Markets Division 1200 Pennsylvania Avenue NW (6204N) Washington, D.C. 20460

Send submittals that are required to be submitted to the U.S. EPA regional office to:

Chief Air Enforcement Air and Radiation Branch EPA Region V 77 West Jackson Boulevard Chicago, Illinois 60604

Table B lists most of the submittals required by this permit. Please note that some submittal requirements may appear in Table Aor, if applicable, within a compliance schedule located in Table C. Table B is divided into two sections in order to separately listone-time only and recurrent submittal requirements.

Unless another person is identified in the applicable Table, send all other submittals to:

AQ Compliance Tracking Coordinator Industrial Division Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194

TABLE B: ONE TIME SUBMITTALS OR NOTIFICATIONSFacility Name: Northshore Mining - Silver Bay


02/05/15B-2

What to send When to send Portion of Facility Affected

Application for Permit Reissuance due 180 days before expiration of ExistingPermit

Total Facility

Notification of compliance status due 30 days after Discovery of Deviation ofApplicability status for any Emission Unit ofGP 001. This one-time notification is requiredin the event that the unit has become anaffected unit subject to the requirements ofthe federal Acid Rain Program.

GP001

Notification of the Actual Date of Initial Startup due 15 days after Initial Startup for emissionunits (beyond EU 637) in GP 019(Concentrate Loadout Operations).

GP019

Notification of the Actual Date of Initial Startup due 15 days after Initial Startup of EU 001following completion of modficationsauthorized for EU 001 by Air EmissionsPermit No. 07500003-009.

EU001

Notification of the Actual Date of Initial Startup due 15 days after Initial Startup of EU 002following completion of modficationsauthorized for EU 002 by Air EmissionsPermit No. 07500003-009.

EU002

Notification of the Date Construction Began due 30 days after Start Of Construction of themodifications authorized for EU 001 by AirEmissions Permit No. 07500003-009.

EU001

Notification of the Date Construction Began due 30 days after Start Of Construction of themodifications authorized for EU 002 by AirEmissions Permit No. 07500003-009.

EU002

Notification due 14 days after Fuel Supplier Certificationor Fuel Sulfur Analysis indicated fuel sulfur ina shipment exceeded 0.50% by weight.

GP001

Notification due 15 days after Startup with fuel oilfollowed by 500 hours of use of fuel oil at anyfurnace.

GP014

Notification due 30 days after Resuming Operation ofProcess Boilers 1 and 2. The Permittee shalldo an applicability determination beforeresuming operation. If a permit action isrequired, the Permittee shall apply for andreceive the appropriate authorization beforeresuming operation.

GP002

Testing Frequency Plan due 60 days after 04/12/2006. The plan shallspecify a testing frequency for this group on arotating basis, based on the test data andMPCA guidance. Future performance testsbased on one-year (12 months), 36 months,and 60 months intervals, or as applicable,shall be required upon written approval of theMPCA.

GP010


GP004


GP006



02/05/15B-3

Testing Frequency Plan due 60 days after 10/12/2005. The plan shallspecify a testing frequency based on the testdata and MPCA guidance. Futureperformance tests based on one-year (12months), 36 months, and 60 months intervals,or as applicable, shall be required uponwritten approval of the MPCA.

EU005


GP007, GP009


GP008


GP015

Testing Frequency Plan due 60 days after Initial Performance Test forCO emissions from EU 001. The plan shallspecify a testing frequency based on the testdata and MPCA guidance. Futureperformance tests based on 12-month,36-month, or 60-month intervals, or asapplicable, shall be required upon writtenapproval of the MPCA.

EU001

Testing Frequency Plan due 60 days after Initial Performance Test forCO emissions from EU 002. The plan shallspecify a testing frequency based on the testdata and MPCA guidance. Futureperformance tests based on 12-month,36-month, or 60-month intervals, or asapplicable, shall be required upon writtenapproval of the MPCA.

EU002

Testing Frequency Plan due 60 days after Initial Performance Test forSO2 emissions from Furnace 5. The planshall specify a testing frequency for this groupon a rotating basis, based on the test dataand MPCA guidance. Future performancetests based on one-year (12 months), 36months, and 60 months intervals, or asapplicable, shall be required upon writtenapproval of the MPCA.

GP014

Testing Frequency Plan due 60 days after Initial Performance Test forSO2 emissions while burning fuel oil for anyfurnace (EU100, EU110, EU262, or EU634).The plan shall specify a testing frequency forthis group on a rotating basis, based on thetest data and MPCA guidance. Futureperformance tests based on one-year (12months), 36 months, and 60 months intervals,or as applicable, shall be required uponwritten approval of the MPCA.

GP014



02/05/15B-4

Testing Frequency Plan due 60 days after Initial Performance Test.The plan shall specify a testing frequency forthis group on a rotating basis, based on thetest data and MPCA guidance. Futureperformance tests based on one-year (12months), 36 months, and 60 months intervals,or as applicable, shall be required uponwritten approval of the MPCA.

GP002, GP019

TABLE B: RECURRENT SUBMITTALSFacility Name: Northshore Mining - Silver Bay


02/05/15B-5

What to send When to send Portion of Facility Affected

Ambient Air Monitoring Report due 45 days after end of each calendarquarter starting 07/14/2006 to provide ambientair quality data on TSP and PM10 to comparewith ambient air quality standards. If ambientPM10 measurements are greater than 145micrograms/cubic meter, the Permittee shallsubmit, along with the quarterly ambient airmonitoring report, an analysis of suchinstances and a description of any correctiveaction(s) taken.

Total Facility

Cylinder Gas Audit (CGA) Results Summary due 30 days after end of each calendarquarter starting 07/14/2006 in which a CGAwas conducted.

MR005, MR006, MR007

Excess Emissions/Downtime Reports (EER's) due 30 days after end of each calendarquarter starting 07/14/2006 . (SubmitDeviations Reporting Form DRF-1 asamended). The EER shall indicate all periodsof monitor bypass and all periods ofexceedances of the limit includingexceedances allowed by an applicablestandard, i.e. during startup, shutdown, andmalfunctions.

GP001

Excess Emissions/Downtime Reports (EER's) due 30 days after end of each calendarquarter starting 12/29/2010. SubmitDeviations Reporting Form DRF-1 asamended. The EER shall indicate all periodsof monitor bypass and all periods ofexceedances of the limit includingexceedances allowed by an applicablestandard, i.e. during startup, shutdown, andmalfunctions. The EER must be submittedeven if there were no excess emissions,downtime or bypasses during the quarter.

MR005, MR006, MR007, MR008, MR009,MR010

Relative Accuracy Test Audit (RATA) ResultsSummary

due 30 days after end of each calendarquarter starting 07/14/2006 in which a RATAwas conducted.

MR005, MR006, MR007, MR008, MR009,MR010

Semiannual Deviations Report due 30 days after end of each calendarhalf-year starting 07/14/2006 . The firstsemiannual report submitted by the Permitteeshall cover the calendar half-year in which thepermit is issued. The first report of eachcalendar year covers January 1 - June 30.The second report of each calendar yearcovers July 1 - December 31. If no deviationshave occurred, the Permittee shall submit thereport stating no deviations.

Total Facility

Compliance Certification due 31 days after end of each calendar yearstarting 07/14/2006 (for the previous calendaryear). The Permittee shall submit this on aform approved by the Commissioner, both tothe Commissioner and to the US EPAregional office in Chicago. This report coversall deviations experienced during the calendaryear.

Total Facility

APPENDIX B

Facility Name: Northshore Mining Co - Silver Bay Permit Number: 07500003-010

Appendix B, Page 1

Fugitive Dust Control Actions Required for Mile Post 7 Area

The following requirements apply to the Milepost 7 Tailings Basin area.

(1) Air Control Technology

Pursuant to this Permit, best available air emission control technology shall include specifically, but not exclusively, the use of tailings submersion to the maximum extent practicable but consistent with the Milepost 7 Five Year Operations Plan, as conditionally approved by the MPCA on August 21, 1997 (and any revisions thereto as approved by the MPCA and in compliance with the terms of NPDES/SDS Permit MN 0055301 and this Permit), vegetation, spray water, effective and nonpolluting chemical binders, or other dust retardants on all exposed tailings surfaces.

(2) Tailings Disposal and Stabilization

All tailings except coarse tailings hauled to the Peter Mitchell Mine Pit, tailings used for road, dam and dike construction within the basin, backfill in the plant area, or tailings temporarily stored within the basin for future construction purposes, shall be placed within the tailings basin at all times and may be surface spigotted and stabilized consistent with the Milepost 7 Five Year Operations Plan, as conditionally approved by the MPCA on August 21, 1997, and any revisions thereto as approved by the MPCA and in compliance with the terms of NPDES/SDS Permit MN 0055301 and this Permit.

(3) Exposed Coarse Tailings ‐ Wetting

Coarse tailings shall approximate the particle size distribution outlined by Attachment 1. The coarse tailings shall contain a silt (size fraction smaller than 74 microns) content that shall comply with Attachment 2. Representative sampling, and testing of the gradation of this material at the loading facilities by the plant shall be conducted at least once a month; the results shall be reported monthly to the MPCA. Portions of these representative samples shall be provided to the MPCA for purposes of a quality assurance audit, as requested by the MPCA.

Coarse tailings shall be sufficiently moist before and after railroad car or truck load‐out at the facility to minimize dust emissions during loading, transportation and unloading operations.

The coarse tailings material shall be wetted in such a manner as to maintain zero visible emissions until it is treated with dust suppressants, vegetated, or placed under water. There shall be no stockpiling of coarse tailings at the plant. The water content of the coarse tailings shall be verified and reported monthly to the MPCA.

Excessive wetting shall be controlled to avoid free draining of water from the railroad cars during the transportation of coarse tailings. Appropriate measures have been implemented to control and collect drainage from the railroad cars prior to transport, and shall continue to be maintained.

(4) Exposed Coarse Tailings ‐ Splitter Dikes, Railroad Roadbeds, Dams

APPENDIX B


Appendix B, Page 2

There shall be no more than a 400‐foot wide exposed coarse tailings surface on the basin splitter dikes (including safety berms), and no more than a 200‐foot wide exposed coarse tailings surface on railroad roadbeds not located on basin splitter dikes. The total exposed area of coarse tailings shall at no time exceed 300 acres. Estimates of the total exposed coarse tailings area shall be performed monthly, and reported to the MPCA upon request. (5) Exposed Coarse Tailings ‐ Vegetation and Treatment

The balance of the exposed coarse tailings area shall be vegetated or treated with dust suppressants of such concentration and applied with such frequency that, except for emissions caused by extreme meteorological conditions, the visible emissions from these areas shall be essentially zero. Field tests for selected dust suppressant chemicals to be used for various application situations have been conducted, and a Fugitive Emissions Control Plan provided to the MPCA for approval and the MPCA hereby approves the continued use of the chemicals and methods described in the Fugitive Emissions Control Plan. This plan must be resubmitted within 90 days of the issuance of this Permit, for MPCA review and approval.

Should future studies or information prove that Coherex, or any other dust suppressants approved by the MPCA, are environmentally unsound, the MPCA may require a change in the use of dust suppressants.

The Regulated Party shall continue implementation of the approved vegetation plan to provide sufficient vegetative cover which will become self‐sustaining, will minimize the emission of dust and fibers and will minimize the erosion of basin structures. The vegetation plan shall continue to be included as part of the Milepost 7 Five Year Operations Plan, as conditionally approved by the MPCA on August 21, 1997, and any revisions thereto as approved by the MPCA and in compliance with the terms of NPDES/SDS Permit MN 0055301 and this Permit. In addition, the vegetation activities shall be recorded monthly, and reported to the MPCA upon request.

(6) Treatment Technology

The Regulated Party shall be required to apply the Best Available Technology (BAT) to maintain air quality and to comply with all applicable laws, rules, court orders, and decisions, specifically including Minn. R. 7009.0010 to 7009.0080 and other duly adopted rules and standards which now or in the future may be applied to the facility.

(7) Air Quality Limits

The air quality standards at or beyond the property line of the disposal system to which the Regulated Party shall adhere, consistent with the determination of the Minnesota Supreme Court, are, among others, as follows:

a. Compliance with Minn. R. 7009.0010 to 7009.0080, 7011.0700 to 7011.0735 and 7011.0150;

b. Fibers in the ambient air shall be below a medically significant level;

APPENDIX B


Appendix B, Page 3

c. The ambient air shall contain no more fibers than that level ordinarily found in the ambient air of a control city such as St. Paul;

d. The fibers in the ambient air shall be maintained below a level which is injurious to human health or welfare in violation of Minn. Stat. § 116.06 (3); and

e. Such other standards which now or in the future may be applied to the Regulated Party’s fiber emission.

The MPCA recognizes that the above fiber level standards or measurements applicable to fiber emissions emanating from the Regulated Party's operations are to be determined in the future to a degree which approaches reliable scientific and medical precision. The control city standard set forth in paragraph (c) was found by the federal courts to be based on a reasonable medical theory. Any future fiber level standards applied pursuant to paragraphs (b), (d), and (e) must likewise be based on a reasonable medical theory.

(8) Definitions

“Fibers”, for the purpose of this Permit, are defined as chrysotile and amphibole mineral particles with 3‐to‐1 or greater aspect ratios.

“Fugitive dust” means particulate emissions from open sources exposed to the air environment which enter the atmosphere due to the forces of wind, man's activity, or both.

“Coarse tailings” means a mixture of 65‐75 percent dry cobs and 25‐35 percent filtered tailings.

“Exposed coarse tailings" means coarse tailings surfaces that have not been treated by artificial means including but not limited to watering, chemical stabilization, mulching or vegetation, or natural methods (rainfall or snow cover).

APPENDIX C


Appendix C, Page 1

Daily Visible Emission Checklists – Explanation & An Example The Permittee shall develop Daily Visible Emission Checklists for the stack equipped with dry control equipment as part of the O & M Plan. An example is provided on the next page. Note that fabric filters (baghouses) that are equipped with MPCA‐approved broken bag detectors are not subject to daily visible emission inspection.

The Permittee shall also develop Daily Visible Emission Checklists for fugitive emission sources at the Silver Bay facility as part of the Fugitive Control Plan for the Silver Bay facility. Note that FS 018 denotes the untreated beaches at Mile Post 7 Tailings Basin Area, for which special control actions are required for fugitive dust in general. See Appendix B of this permit.

A checklist may cover only a few stacks, a few fugitive emission sources, or a number of stacks and nearby fugitive emission sources. Weather condition codes (ambient air temperature; and “clear,” “foggy,” or “raining/snowing”.) are included in the checklists to help assessing whether ambient air conditions were conductive to making the visible emission check.

Daily Visible Emission Checklist (Part of the O & M Plan): An example*

Visual inspection of each stack is to be recorded on day shift Sunday through Saturday.

Record “OK” if equipment does not require attention.

Record “RA” if equipment requires attention to reduce visible emission from the stack.

Record actions taken to remedy problems that require attention (“RA” items).

Record “Moist” if moisture plume limits visible emission observations.

If the unit is down for more than one hour and the service area is active, notify the Environmental Engineer with the following information: Unit number, time it went down, why it went down, and when it is expected to be operating again.

At the end of each week, send completed inspection form to Environmental Engineer to file.

SV EU CE Operator

ID Description SUN MON TUE WED THU FRI SAT

Year Date

→

Time Initials

APPENDIX C


Appendix C, Page 2

Record corrective actions or comments for each “RA.” Also record pressure drop and/or water pressure/flow for each unit that moisture plume interferes with the observation.

Date ___/___/______ Employee __________________ # ____________________ * This is an example for the Permittee to develop their own checklists. This example may not

have included all the requirements specified in the text of this Appendix or relevant information required through other regulatory actions in effect. This example is not for fugitive emission sources.

Fugitive Emission Sources for this permit.

FS # Unit Description Area FS 001a Transfer (Conveyor from Ship to Small Coal Stockpile) Coal Yard FS 002a Unpaved Roads (Scrapers moving Coal from Small to Main

Stockpile) Coal Yard

FS 002b Transfer (Scrapers from Small Stockpile to Main Stockpile) Coal Yard FS 002c Unpaved Roads (Scraper moving Coal from Main Stockpile to

Dump Pocket) Coal Yard

FS 002d Transfer (Scraper from Main Stockpile to Dump Pocket Conveyor)

Coal Yard

FS 002e Transfer (Conveyor to Conveyor) Coal Yard FS 003a Wind Erosion (Small Coal Stockpile) Coal Yard FS 003b Wind Erosion (Main Coal Stockpile) Coal Yard FS 004a Transfer (Conveyor from Ship to Hopper) Fluxstone FS 004b Transfer (Hopper to Conveyor) Fluxstone FS 004c Transfer (Conveyor to Conveyor) Fluxstone FS 004d Transfer (Conveyor to Stacker) Fluxstone FS 004e Transfer (Stacker to Stockpile) Fluxstone FS 005a Unpaved Roads (Truck Hauling Fluxstone) Fluxstone FS 006a Transfer (FEL from Small Stockpile to Dump Pocket Conveyor) Fluxstone FS 006b Transfer (Conveyor to Silo) Fluxstone FS 007a Wind Erosion (Initial Fluxstone Stockpile) Fluxstone FS 008 Source Removed Source Removed FS 009a Transfer (Silo to Railcar) Coarse Tails Handling FS 010a Transfer (Conveyor 60A to 40) Pellet Cooling FS 011a Transfer (Conveyor 40 to Cooling Pile) Pellet Cooling FS 011b Transfer (Conveyor 41 to 42) Pellet Cooling FS 012a Wind Erosion (Cooling Pile) Pellet Cooling FS 013a Transfer (Conveyor 160 to 161) Pellet Handling FS 013b Transfer (Conveyor 60 to 61) Pellet Handling FS 013c Transfer (Conveyor 161 to 62/162/H) Pellet Handling FS 013d Transfer (Conveyor 61 to 62/162/H) Pellet Handling

APPENDIX C


Appendix C, Page 3

FS 013e Transfer (Conveyor H to Stockpile H) Pellet Handling FS 013f Transfer (Conveyor J to Small Stockpile) Pellet Handling FS 013g Transfer (Conveyors 62/162 to 63/163) Pellet Handling FS 013h Transfer (Conveyors 63/163 to 64) Pellet Handling FS 013i Transfer (Conveyors 63/163 to Bins) Pellet Handling FS 013j Transfer (Conveyor 64 to Laydown Conveyor) Pellet Handling FS 013k Transfer (Laydown Conveyor to Main Stockpile) Pellet Handling FS 013l Wind Erosion (Stockpile H) Pellet Handling FS 014a Transfer (Single F Conveyor to 1st Boat Loader) Pellet Handling FS 014b Transfer (1st Boat Loader to Ship) Pellet Handling FS 014c Transfer (Single F Conveyor to 2nd Boat Loader) Pellet Handling FS 014d Transfer (2nd Boat Loader to Ship) Pellet Handling FS 015a Wind Erosion (Main Stockpile) Pellet Handling FS 016a Transfer (FEL from Main Stockpile to Pocket 1 Conveyor) Pellet Reclaiming FS 016b Transfer (Pocket 1 Conveyor to Conveyor 67) Pellet Reclaiming FS 016c Transfer (FEL from Main Stockpile to Pocket 2 Conveyor) Pellet Reclaiming FS 016d Transfer (Pocket 2 Conveyor to Conveyor 67) Pellet Reclaiming FS 016e Transfer (Conveyor 67 to Pocket 3) Pellet Reclaiming FS 016f Transfer (Conveyor Pocket 3 to Wet Screen) Pellet Reclaiming FS 016g Transfer (FEL from Chips/Fines Stockpile to Truck) Pellet Reclaiming FS 016h Transfer (FEL to Stacker Conveyor) Pellet Reclaiming FS 016j Transfer (Chips Unloading Chips/Fines to Pellet Yard) Pellet Reclaiming FS 016k Transfer (Screening Recycle to Crushing) Pellet Reclaiming FS 016l Transfer (Pellets Conveyor to Conveyor 67) Pellet Reclaiming FS 016m

Transfer (Chips/Fines Conveyor to Stacker Conveyor) Pellet Reclaiming

FS 016n Transfer (Stacker Conveyor to Chips/Fines Stockpile) Pellet Reclaiming FS 017a Transfer (FEL from Main Stockpile to Hopper) Pellet Screening FS 017b Transfer (Hopper to Crushing) Pellet Screening FS 017c Crushing Pellet Screening FS 017d Transfer (Conveyor from Crushing to Screening) Pellet Screening FS 017e Screening Pellet Screening FS 018a Mile Post 7 Untreated Basin Beaches Basin FS 019a Unpaved Roads (Light Truck Traffic around plant) General Plant FS 019b Paved Roads (Light Truck Traffic around plant) General Plant FS 019c Unpaved Roads (Truck transporting Coal Ash) General Plant FS 020a Floatation Reagent Coal Yard FS 021a Paved Roads (Truck Hauling Concentrate) General Plant

APPENDIX D


Appendix D, Page 1

Current Status and Plan for TSP Compliance

1. Environmental Standard Operating Procedures (ESOPs) have been formally written and implemented for Fugitive Dust control in each relevant department; department employees receive annual training on those ESOPs. ESOPs specify the goal of “no visible dust emissions” and specify equipment or methods available to control emissions. The training stresses that extra vigilance is needed during dry, windy conditions, and when dust‐generating potential is higher than normal due to multiple activities (e.g. reclaiming and boat loading).

2. General Fugitive Dust Awareness and Prevention training is given to all employees at plant.

3. Screenhouse rotoclone reliability is optimized by scheduling cleanout at least every 8 weeks.

4. Screenhouse rotoclone operation plan: at first sight of excessive emissions, shut down feed to the screenhouse until problem is solved. If problem cannot be solved promptly, shut down rotoclone fan to prevent excessive stack emissions until problem is solved.

5. Cooling pile operating procedure has been revised as follows: during furnace startup, add maximum water at available transfer points between the furnace discharges and the cooling pile yard. (Note: during winter operations, water application can only be made at the furnace discharges.)

6. Road watering and sweeping are performed as needed; any employee may call for a watering truck.

7. Road watering and/or Coherex application includes parking areas, road shoulders, driving lanes in Pellet Yard, and areas of Pellet Yard newly exposed by removal of the storage pile.

8. Fines dredged from overflow channel shall be reclaimed and sent to Milepost 7; if reclaiming is not possible before they dry out, they shall be treated with Coherex.

9. Fines chute from end of D conveyor is being re‐engineered in an attempt to avoid the plugging and icing problems that caused a safety concern before. If an effective design can be implemented in a cost‐effective manner, such a chute will be installed at the end of D conveyor and possibly at the center (halfway point, lengthwise) of the D conveyor.

10. Fines chute from end of boat loading conveyors is being re‐engineered to avoid plugging. If tests indicate that an effective and affordable design can be implemented, it will be installed on both boat loaders.

11. Water sprays, watering trucks and other equipment installed or purchased for dust control shall be maintained in good working order.

12. Exhaustive tests of many chemical dust suppressants have so far failed to find a suppressant compatible with pellets as they leave Northshore Mining’s furnaces. However, Northshore continues to be open to the possibility that such a suppressant will be developed and become available at some time in the future. In the event that a future chemical is developed that is compatible with Northshore’s chemical and operating requirements, Northshore will continue to explore the possibility of cost‐effective application of such chemicals.

APPENDIX D


Appendix D, Page 2

Table 1. Actions Taken or Began, Equipment Installed During Previous Plans & Revisions

Implemented Description of Action/Project/Equipment Installation 1998 Implemented annual employee fugitive dust training plantwide. 1999 Paved the limestone haul road.

1999 onward Published memos relating to problems, increased vigilance at Pellet Plant and Material Handling. 1999 Installed vacuum cleaner system in “D” conveyor gallery to remove loose dust which might otherwise fall to

ground from highest conveyor belt on property. Also added 4” water header to “D” conveyor gallery to allow wet cleanup when appropriate.

1999 Installed wipers on head end of boat loaders to sweep fines into boat instead of allowing them to be carried back to the dock.

1999 Automated and improved water sprays on 160 head end and along 62/162 conveyors. (Water had been present but not as well controlled.)

1999 Installed adjustable water controls on “F” conveyors to allow boat loader operators to control spray in response to visual cues.

1999 Installed automatic water spray on Truck Dump pocket. 1999 Purchased sweeper to sweep paved roads and dock area during non-freezing months. (Sweeper requires a damp

road to work, so is not usable during winter months.) 1999 Installed water header in pellet storage yard to support water cannons during non-freezing months. 1999 Committed to more aggressive use of Coherex or chloride compounds as dust suppressant on unpaved roads. 1999 Installed large double-walled storage tank for Coherex on-site to improve the supply and eliminate the need to

rely on contractor availability. 1999 Began treating parking lots and unpaved road shoulders in dust suppressant treatment program. 1999 Increased road watering frequency during non-freezing months. 1999 Began washing boat loaders instead of sweeping. Initial effort was during the non-freezing months only;

subsequent improvements in water supply have extended the period when this activity is feasible. 1999 Added motor amperage monitoring and alarming to screenhouse rotoclone display in control room; improved

water level control. 1999 Changed screenhouse rotoclone operation policy: At first sign of excessive emissions, shut down feed to

screenhouse until problem solved. If immediate repair not possible, leave rotoclone off to contain feed inside screenhouse, and restrict feed to 100 LTPH.

1999 Trained Yards & Docks personnel to run watering truck in order to allow quicker response to unexpected dust. 2000 - 2001 Installed water sprays on dump pockets in pellet yard: completed truck dump spray system; added sprays to 2

reclaim pockets. 1999 onward Replaced 2 Concentrator multiclones with more efficient, newer-technology cartridge filters. 1999 onward Research and investigation into dust suppressant for cooling pile pellets.

2000 Paved haul road: Power House to DMO via Pumphouse 1. 2000 Reactivated 12S rotoclone in Pellet Plant to reduce load on Screenhouse rotoclone and improve its performance. 2000 Installed water cannon in pellet yard to be used as necessary during non-freezing conditions. 2000 Overhauled watering truck to improve reliability. 2000 Purchased additional water cannon and built another, for a total of 3 water cannons in pellet yard.

2000 onward (recurrent)

Cleaned out culvert system to allow better drainage on docks, reduce fines deposited on dock area that can dry out and blow around.

2000 Added more water sprays and control valves at each conveyor. 2001 Installed cleanouts for F conveyor galleries to allow wet cleanout instead of dry sweeping of fines. 2001 Installed dump snout/chute from end of ‘’D” conveyor to control falling dust. Experienced plugging problems;

snout had to be removed in 2002 for safety reasons. 2001 Automated water sprays for F conveyors to allow operation from boatloader cabs; improves response to and

control of dust during boat loading operations. 2002 Continued paving around plant where appropriate. 2002 Replaced black and white camera on cooling pile with color camera to improve Control Room’s ability to

discriminate between dust and steam. 2002 Improved lighting in pellet yard to allow better dust detection at night.

Began 2002 (recurrent)

Removed fines dredged from mill water overflow channel (final channel of stormwater collection system) and deposited in tailings basin.

APPENDIX E


Appendix E, Page 1

Modeling Information (Furnace 5 Reactivation)

Modeling Parameters Used for Northshore Mining Company Furnace 5 Reactivation Project

Hardcopy Report Submittals

Air Emissions Permit Application for the Furnace 5 Reactivation Project, prepared for Northshore Mining Company, Silver Bay, Minnesota, (Volumes I, II, and III), May 2, 2005.

Addendum 1 (May 16, 2005) and PSD Air Quality Modeling for Northshore Mining Company, prepared by W. Gale Biggs Associates, May 2005.

Electronic (CD‐ROM) Submittals

Northshore Mining Company – Silver Bay, MN, PSD Air Permit Application, Air Emission Risk Analysis (AERA), Air Dispersion Modeling Input Output Files for the Furnace 5 Reactivation Project, prepared by Barr Engineering Company, May 2, 2005.

Addendum 1 CD‐ROM with hand‐written title: “Northshore WGBA Air Modeling, May 2005” (Received May 16, 2005).

Appendix A – Summary: Computer‐Generated “REPORT” Format with Simple Headers, Simple Sources, and Selected Parameters

The summary report is for simple (constant) emission rates and corresponding stack/source parameters. It does not fully document details regarding

model control options, emission rates with varying emission scalars, corresponding stack/source parameters, wind speed categories for wind erosion, building profile input program (BPIP) outputs, various output selections (e.g., EVENTFIL, MULTYEAR, PLOTFILE, POSTFILE, MAXIFILE), applicable “INCLUDED” file information, receptor grids, or other special features noted in the following EPA modeling user guides:

ISCST3: http://www.epa.gov/scram001/userg/regmod/isc3v1.pdf

AERMOD: http://www.epa.gov/scram001/7thconf/aermod/aermodugb.pdf

Appendix A – Full Details

See CD‐ROM for full data details.

Addendum 1 Emission Changes (May 16, 2005)

Increased PM10 point sources SV261‐SV263; Increased PM10 point sources SV266‐SV268; Decreased PM10 point source SV269; Deleted PM10 fugitive sources FS008a and FS008b.

APPENDIX E


Appendix E, Page 2

A separate table is shown for each applicable combination of model (Northshore on‐site model vs. EPA reference model), regulatory requirement (NAAQS vs. Increment), pollutant (CO, NOX, PM10, and SO2), and operating scenario (PM10 only):

- Scenario A: Raising five (5) dry cobbing stacks by five (5) meters (while leaving all concentrator emissions as proposed)

o Concentrator Emission Rates (Approximate) o SV032‐SV032 at 0.0 grams/second o SV033‐SV042 at 0.1 grams/second o SV043‐SV043 at 0.2 grams/second o SV044‐SV053 at 0.1 grams/second (including SV276 [formerly SV052]) o Dry Cobbing Stack Heights (SV021‐SV025): 141.4 feet

- Scenario B: Leaving all dry cobbing stacks at their current height (while reducing the number of concentrator stacks by five)

o Concentrator Emission Rates (Approximate) o SV032‐SV037 at 0.0 grams/second o SV038‐SV042 at 0.1 grams/second o SV043‐SV043 at 0.2 grams/second o SV044‐SV053 at 0.1 grams/second (including SV276 [formerly SV052]) o Dry Cobbing Stack Heights (SV021‐SV025): 125.0 feet

- Scenario C: Interim Modification Phase (during the initial phase of construction and restart of the additional production capacity)

o Concentrator Emission Rates (Approximate) o SV032‐SV039 at 0.0 grams/second o SV040‐SV041 at 0.1 grams/second o SV042‐SV044 at 0.2 grams/second o SV045‐SV047 at 0.0 grams/second o SV048‐SV050 at 0.2 grams/second o SV051‐SV051 at 0.0 grams/second o SV052‐SV053 at 0.2 grams/second (including SV276 [formerly SV052]) o Dry Cobbing Stack Heights (SV021‐SV025): 125.0 feet

Note: if any difference exists between summary values in this appendix vs. the hardcopy report vs. the electronic CD‐ROM modeled values, the electronic CD‐ROM modeled values prevail.

APPENDIX E


Appendix E, Page 3

*** ISCST2 - VERSION 93109 *** *** NMC - CO PSD NORTHSHORE - 1992 *** 02/19/05 *** FURNACE 5 RESTART - 2004 *** 07:59:29 C:\PROJECTS\NMCMAY05\MAY_16TH\CO9204N.OUT **This Run Includes: 20 Source(s); 1 Source Group(s); and 683 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 5.22 41.40 181.31 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 7.72 61.25 268.28 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 1.59 12.65 55.41 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101 631339 5238341 197 0.15 1.18 5.18 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 0.16 1.25 5.46 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 0.16 1.29 5.67 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 0.57 4.54 19.88 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 0.57 4.54 19.88 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 0.15 1.18 5.18 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 0.16 1.25 5.46 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113 631371 5238367 197 0.16 1.29 5.67 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 0.57 4.54 19.88 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 0.57 4.54 19.88 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV261 631241 5238189 197 0.51 4.07 17.83 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 0.54 4.28 18.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 0.56 4.46 19.54 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266 631253 5238206 197 0.51 4.07 17.83 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267 631250 5238201 197 0.54 4.28 18.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268 631245 5238194 197 0.56 4.46 19.54 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 TOTAL 20.98 166.52 729.33

APPENDIX E


Appendix E, Page 4

*** ISCST2 - VERSION 93109 *** *** NMC - NOX PSD SITE-SPECIFIC VERSION - 1992 *** 12/02/04 *** FURNACE 5 - 2004 *** 18:59:05 C:\PROJECTS\NMCMAY05\MAY_16TH\NOX9204N.OUT **This Run Includes: 19 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 58.68 465.71 2039.72 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 86.83 689.11 3018.14 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 2.93 23.25 101.85 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101 631339 5238341 197 2.05 16.30 71.40 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 2.16 17.12 74.98 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 2.25 17.84 78.14 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 7.87 62.44 273.49 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 7.87 62.44 273.49 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 2.05 16.30 71.40 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 2.16 17.12 74.98 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113 631371 5238367 197 2.25 17.84 78.14 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 7.87 62.44 273.49 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 7.87 62.44 273.49 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV261 631241 5238189 197 1.83 14.53 63.65 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 1.92 15.26 66.84 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 2.00 15.90 69.66 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266 631253 5238206 197 1.83 14.53 63.65 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267 631250 5238201 197 1.92 15.26 66.84 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268 631245 5238194 197 2.00 15.90 69.66 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 TOTAL 204.34 1621.78 7103.00

APPENDIX E


Appendix E, Page 5

*** ISCST2 - VERSION 93109 *** *** NMC - NOX PSD SITE-SPECIFIC VERSION - 1992 *** 01/07/05 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 10:56:18 C:\PROJECTS\NMCMAY05\MAY_16TH\NI9204N.OUT **This Run Includes: 22 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001C 631531 5238473 192 33.38 264.92 1160.29 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002C 631552 5238492 192 16.97 134.68 589.88 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.00 0.00 0.00 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101C 631339 5238341 197 1.07 8.49 37.19 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102C 631344 5238339 197 1.07 8.49 37.19 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103C 631348 5238336 197 1.07 8.49 37.19 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104C 631334 5238299 197 3.90 30.95 135.56 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105C 631343 5238292 197 3.90 30.95 135.56 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111C 631362 5238373 197 0.96 7.62 33.37 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112C 631366 5238370 197 0.96 7.62 33.37 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113C 631371 5238367 197 0.96 7.62 33.37 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114C 631355 5238332 197 3.52 27.94 122.36 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115C 631363 5238326 197 3.52 27.94 122.36 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV261C 631241 5238189 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262C 631238 5238185 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263C 631235 5238178 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266E 631253 5238206 197 -0.76 -6.03 -26.42 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.76 -6.03 -26.42 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.76 -6.03 -26.42 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266C 631253 5238206 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267C 631250 5238201 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268C 631245 5238194 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 TOTAL 80.52 639.05 2798.87

APPENDIX E


Appendix E, Page 6

*** ISCST3 - VERSION 02035 *** *** NMC - NOX PSD REGULATORY VERSION - 1992 *** 01/07/05 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 10:56:39 C:\PROJECTS\NMCMAY05\MAY_16TH\NI9204R.OUT **This Run Includes: 64 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001C 631531 5238473 192 33.38 264.92 1160.29 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002C 631552 5238492 192 16.97 134.68 589.88 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.00 0.00 0.00 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101C 631339 5238341 197 1.07 8.49 37.19 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102C 631344 5238339 197 1.07 8.49 37.19 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103C 631348 5238336 197 1.07 8.49 37.19 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104C 631334 5238299 197 3.90 30.95 135.56 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105C 631343 5238292 197 3.90 30.95 135.56 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111C 631362 5238373 197 0.96 7.62 33.37 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112C 631366 5238370 197 0.96 7.62 33.37 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113C 631371 5238367 197 0.96 7.62 33.37 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114C 631355 5238332 197 3.52 27.94 122.36 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115C 631363 5238326 197 3.52 27.94 122.36 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV261C 631241 5238189 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262C 631238 5238185 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263C 631235 5238178 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266E 631253 5238206 197 -0.76 -6.03 -26.42 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.76 -6.03 -26.42 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.76 -6.03 -26.42 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266C 631253 5238206 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267C 631250 5238201 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268C 631245 5238194 197 1.92 15.24 66.74 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F101E 631303 5238276 197 -0.78 -6.19 -27.11 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F102E 631300 5238272 197 -0.78 -6.19 -27.11 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F103E 631297 5238268 197 -0.78 -6.19 -27.11 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F1DSE 631342 5238253 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F201E 631293 5238261 197 -0.74 -5.87 -25.72 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F202E 631290 5238256 197 -0.74 -5.87 -25.72 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F203E 631286 5238251 197 -0.74 -5.87 -25.72 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F2DSE 631330 5238236 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F301E 631282 5238245 197 -0.75 -5.95 -26.07 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F302E 631297 5238242 197 -0.75 -5.95 -26.07 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F303E 631275 5238236 197 -0.75 -5.95 -26.07 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F3DSE 631319 5238221 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F401E 631271 5238229 197 -0.74 -5.87 -25.72 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F402E 631268 5238225 197 -0.74 -5.87 -25.72 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F403E 631265 5238220 197 -0.74 -5.87 -25.72 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F4DSE 631309 5238204 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 AREA SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) XDIM(M) YDIM(M)

AREA HWY1 631687 5239246 754 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY2 631629 5239166 736 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY3 631568 5239086 735 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2)

APPENDIX E


Appendix E, Page 7

AREA HWY4 631508 5239006 732 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY5 631453 5238922 728 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY6 631392 5238843 729 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY7 631331 5238763 743 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY8 631272 5238683 747 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY9 631213 5238602 743 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY10 631155 5238521 744 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY11 631101 5238436 738 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY12 631048 5238351 742 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY13 631003 5238260 740 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY14 630958 5238169 735 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY15 630907 5238083 725 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY16 630861 5237993 721 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY17 630818 5237901 702 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY18 630769 5237813 694 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY19 630721 5237724 688 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY20 630671 5237637 678 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY21 630618 5237552 674 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY22 630570 5237463 675 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY23 630515 5237379 670 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY24 630464 5237293 666 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) AREA HWY25 630416 5237204 684 0.00 0.00 0.00 10.00 32.81 10.00 10.00 (0.0000E+00 G/S/M2, 0.1000E+03 M2) TOTAL 71.49 567.38 2484.99

APPENDIX E


Appendix E, Page 8

*** ISCST2 - VERSION 93109 *** *** NMC - SO2 PSD NORTHSHORE SITE-SPECIFIC VERSION - 1992 *** 12/02/04 *** FURNACE 5 RESTART - 2004 *** 19:46:58 C:\PROJECTS\NMCMAY05\MAY_16TH\SO29204N.OUT **This Run Includes: 19 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 9

*** ISCST2 - VERSION 93109 *** *** NMC - SO2 PSD NORTHSHORE SITE-SPECIFIC VERSION - 1992 *** 12/12/04 *** FURNACE 5 RESTART - CLASS II INCREMENT - 2004 *** 13:29:03 C:\PROJECTS\NMCMAY05\MAY_16TH\SI9204N.OUT **This Run Includes: 22 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 0.00 0.00 0.00 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 0.00 0.00 0.00 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.00 0.00 0.00 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101C 631339 5238341 197 0.04 0.32 1.39 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102C 631344 5238339 197 0.04 0.32 1.39 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103C 631348 5238336 197 0.04 0.32 1.39 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104C 631334 5238299 197 0.02 0.16 0.70 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105C 631343 5238292 197 0.02 0.16 0.70 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111C 631362 5238373 197 0.03 0.24 1.04 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112C 631366 5238370 197 0.03 0.24 1.04 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113C 631371 5238367 197 0.03 0.24 1.04 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114C 631355 5238332 197 0.01 0.12 0.52 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115C 631363 5238326 197 0.01 0.12 0.52 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV261C 631241 5238189 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262C 631238 5238185 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263C 631235 5238178 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266C 631253 5238206 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267C 631250 5238201 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268C 631245 5238194 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266E 631253 5238206 197 -0.40 -3.17 -13.90 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.40 -3.17 -13.90 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.40 -3.17 -13.90 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 TOTAL 2.30 18.27 80.02

APPENDIX E


Appendix E, Page 10

*** ISCST3 - VERSION 02035 *** *** NMC - SO2 PSD REGULATORY VERSION - 1992 *** 12/12/04 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 13:29:50 C:\PROJECTS\NMCMAY05\MAY_16TH\SI9204R.OUT **This Run Includes: 39 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 0.00 0.00 0.00 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 0.00 0.00 0.00 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.00 0.00 0.00 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101C 631339 5238341 197 0.04 0.32 1.39 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102C 631344 5238339 197 0.04 0.32 1.39 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103C 631348 5238336 197 0.04 0.32 1.39 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104C 631334 5238299 197 0.02 0.16 0.70 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105C 631343 5238292 197 0.02 0.16 0.70 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111C 631362 5238373 197 0.03 0.24 1.04 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112C 631366 5238370 197 0.03 0.24 1.04 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113C 631371 5238367 197 0.03 0.24 1.04 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114C 631355 5238332 197 0.01 0.12 0.52 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115C 631363 5238326 197 0.01 0.12 0.52 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV261C 631241 5238189 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262C 631238 5238185 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263C 631235 5238178 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266E 631253 5238206 197 -0.40 -3.17 -13.90 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.40 -3.17 -13.90 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.40 -3.17 -13.90 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266C 631253 5238206 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267C 631250 5238201 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268C 631245 5238194 197 0.54 4.26 18.67 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F101E 631303 5238276 197 -0.39 -3.10 -13.56 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F102E 631300 5238272 197 -0.39 -3.10 -13.56 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F103E 631297 5238268 197 -0.39 -3.10 -13.56 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F1DSE 631342 5238253 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F201E 631293 5238261 197 -0.36 -2.86 -12.51 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F202E 631290 5238256 197 -0.36 -2.86 -12.51 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F203E 631286 5238251 197 -0.36 -2.86 -12.51 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F2DSE 631330 5238236 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F301E 631282 5238245 197 -0.51 -4.05 -17.73 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F302E 631297 5238242 197 -0.51 -4.05 -17.73 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F303E 631275 5238236 197 -0.51 -4.05 -17.73 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F3DSE 631319 5238221 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F401E 631271 5238229 197 -0.38 -3.02 -13.21 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F402E 631268 5238225 197 -0.38 -3.02 -13.21 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F403E 631265 5238220 197 -0.38 -3.02 -13.21 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F4DSE 631309 5238204 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 TOTAL -2.62 -20.78 -91.00

APPENDIX E


Appendix E, Page 11

*** ISCST2 - VERSION 93109 *** *** NMC - PM10 - INCREASE FURNACES 5 & 6, MAY 05 - 1992 *** 05/11/05 *** MAY 05 - SITE SPECIFIC MODEL *** 17:34:23 C:\PROJECTS\NMCMAY05\MAY_16TH\PMTSCENA\PM92N.OUT **This Run Includes: 19 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 12

*** ISCST3 - VERSION 02035 *** *** PM10 PSD - MAY 05 REGULATORY MODEL - 1992 - SCENARIO A *** 05/11/05 *** FURNACE 5 - DRY COBBER STACKS +5 M - CHANGE FRN 5&6 *** 17:35:24 C:\PROJECTS\NMCMAY05\MAY_16TH\PMTSCENA\PM92RA.OUT **This Run Includes: 101 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 6.00 47.62 208.56 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 10.00 79.37 347.60 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.48 3.81 16.68 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV005 631537 5238506 193 0.03 0.24 1.04 39.01 127.99 0.460 1.509 298. 25. 77. 12.92 2543.31 4550 POINT SV007 631207 5238929 268 0.17 1.33 5.80 25.30 83.01 1.520 4.987 298. 25. 77. 16.18 3185.04 62210 POINT SV008 631225 5238954 268 0.17 1.33 5.80 25.30 83.01 1.520 4.987 298. 25. 77. 16.18 3185.04 62210 POINT SV009 631270 5238858 239 0.24 1.90 8.34 30.78 100.98 1.830 6.004 298. 25. 77. 16.18 3185.04 90173 POINT SV010 631316 5238926 238 0.24 1.90 8.34 30.78 100.98 1.830 6.004 298. 25. 77. 16.18 3185.04 90173 POINT SV011 631282 5238839 235 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV012 631289 5238848 234 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV013 631295 5238857 233 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV014 631301 5238867 233 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV015 631306 5238874 233 0.06 0.48 2.09 21.03 69.00 1.010 3.314 298. 25. 77. 13.32 2622.05 22612 POINT SV016 631314 5238885 233 0.06 0.48 2.09 21.03 69.00 1.010 3.314 298. 25. 77. 13.32 2622.05 22612 POINT SV017 631323 5238897 232 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV018 631329 5238906 233 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV019 631334 5238915 233 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV020 631341 5238924 233 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV021 631405 5238740 218 0.38 3.02 13.21 43.10 141.40 1.590 5.217 298. 25. 77. 16.03 3155.51 67441 POINT SV022 631472 5238837 217 0.38 3.02 13.21 43.10 141.40 1.590 5.217 298. 25. 77. 16.03 3155.51 67441 POINT SV023 631417 5238757 218 0.33 2.62 11.47 43.10 141.40 1.460 4.790 298. 25. 77. 16.28 3204.72 57751 POINT SV024 631439 5238789 217 0.14 1.08 4.73 43.10 141.40 0.980 3.215 298. 25. 77. 15.15 2982.28 24214 POINT SV025 631461 5238820 217 0.22 1.71 7.51 43.10 141.40 1.220 4.003 298. 25. 77. 15.36 3023.62 38046 POINT SV026 631493 5238765 209 0.02 0.19 0.83 4.88 16.01 0.610 2.001 298. 25. 77. 0.00 0.00 0 POINT SV027 631272 5238442 209 0.02 0.19 0.83 5.79 19.00 0.610 2.001 298. 25. 77. 0.00 0.00 0 POINT SV028 631069 5238585 241 0.02 0.15 0.66 8.84 29.00 0.520 1.706 298. 25. 77. 0.00 0.00 0 POINT SV029 630613 5238326 261 0.01 0.07 0.31 36.88 121.00 0.400 1.312 298. 25. 77. 0.00 0.00 0 POINT SV030 631448 5238773 216 0.04 0.31 1.36 24.08 79.00 0.820 2.690 298. 25. 77. 15.97 3143.70 17870 POINT SV031 631456 5238785 216 0.04 0.31 1.36 25.30 83.01 0.820 2.690 298. 25. 77. 15.97 3143.70 17870 POINT SV032 631411 5238719 216 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV033 631397 5238698 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV034 631383 5238678 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV035 631368 5238657 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV036 631354 5238636 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV037 631340 5238616 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038 631326 5238595 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039 631311 5238574 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040 631293 5238547 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041 631278 5238527 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV042 631264 5238506 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV043 631250 5238485 215 0.20 1.59 6.95 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV044 631473 5238809 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV045 631487 5238829 215 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV046 631501 5238849 215 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437

APPENDIX E


Appendix E, Page 13

POINT SV047 631515 5238871 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV048 631529 5238891 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV049 631544 5238911 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV050 631558 5238933 215 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV051 631572 5238953 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV276 631591 5238980 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV053 631605 5239001 216 0.09 0.75 3.30 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV070 631256 5238333 203 0.01 0.05 0.21 2.44 8.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV071 631256 5238337 203 0.01 0.05 0.21 16.46 54.00 0.400 1.312 298. 25. 77. 0.00 0.00 0 POINT SV072 631288 5238310 199 0.01 0.11 0.49 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV073 631286 5238306 199 0.01 0.11 0.49 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV074 631277 5238287 198 0.05 0.40 1.77 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV075 631255 5238256 198 0.05 0.40 1.77 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV076 631233 5238224 198 0.05 0.40 1.77 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV077 631275 5238342 201 0.02 0.15 0.66 29.57 97.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV078 631316 5238399 201 0.02 0.15 0.66 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV079 631277 5238345 201 0.02 0.15 0.66 29.57 97.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV080 631318 5238402 201 0.02 0.15 0.66 29.57 97.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV081 631311 5238408 202 0.02 0.15 0.66 39.32 129.00 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV082 631318 5238420 202 0.02 0.15 0.66 39.62 129.99 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV083 631321 5238423 202 0.02 0.15 0.66 38.71 127.00 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV084 631332 5238427 202 0.05 0.41 1.81 35.66 116.99 0.520 1.706 298. 25. 77. 0.00 0.00 0 POINT SV097 631351 5238393 198 0.10 0.79 3.48 8.84 29.00 0.980 3.215 339. 66. 150. 0.00 0.00 0 POINT SV101 631339 5238341 197 1.36 10.83 47.41 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 1.43 11.37 49.78 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 1.49 11.84 51.86 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 1.34 10.63 46.58 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 1.34 10.63 46.58 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 1.36 10.83 47.41 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 1.43 11.37 49.78 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113 631371 5238367 197 1.49 11.84 51.86 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 1.34 10.63 46.58 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 1.34 10.63 46.58 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV120 631384 5238301 196 0.50 3.97 17.38 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV121 631406 5238332 195 0.50 3.97 17.38 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV122 631388 5238298 195 0.50 3.97 17.38 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV123 631409 5238329 195 0.50 3.97 17.38 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV124 631381 5238283 195 0.50 3.97 17.38 28.65 94.00 1.160 3.806 328. 54. 130. 21.49 4230.31 48123 POINT SV125 631402 5238314 195 0.50 3.97 17.38 17.98 58.99 1.160 3.806 328. 54. 130. 14.97 2946.85 33522 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV202 631924 5239090 203 0.00 0.00 0.00 13.72 45.01 0.300 0.984 336. 63. 146. 0.00 0.00 0 POINT SV203 632061 5239154 212 0.00 0.00 0.00 1.22 4.00 0.530 1.739 384. 111. 231. 0.00 0.00 0 POINT SV261 631241 5238189 197 1.02 8.09 35.42 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 1.07 8.50 37.23 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 1.12 8.86 38.79 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV265 631288 5238171 196 0.38 3.02 13.21 27.43 89.99 1.220 4.003 339. 66. 150. 13.26 2610.24 32844 POINT SV266 631253 5238206 197 1.02 8.09 35.42 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267 631250 5238201 197 1.07 8.50 37.23 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268 631245 5238194 197 1.12 8.86 38.79 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV269 631299 5238187 196 0.16 1.24 5.42 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844

APPENDIX E


Appendix E, Page 14

AREA SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) XDIM(M) YDIM(M)

AREA COALYARD 631388 5238258 185 0.50 3.98 17.45 20.00 65.62 100.00 200.00 (0.2510E-04 G/S/M2, 0.2000E+05 M2) AREA COREPLNT 631362 5238461 194 0.81 6.41 28.07 15.00 49.21 110.03 110.03 (0.6670E-04 G/S/M2, 0.1211E+05 M2) AREA PELLSTOR 630749 5237663 194 1.99 15.80 69.19 30.48 100.00 267.31 620.57 (0.1200E-04 G/S/M2, 0.1659E+06 M2) AREA FS003 631388 5238258 19120000.00**************** 20.00 65.62 100.00 200.00 (0.1000E+01 G/S/M2, 0.2000E+05 M2) **STAR** AREA FS007 630749 5237663 195************************ 30.48 100.00 267.31 620.57 (0.1000E+01 G/S/M2, 0.1659E+06 M2) **STAR** AREA FS012 631362 5238461 19312106.6096084.13******** 15.00 49.21 110.03 110.03 (0.1000E+01 G/S/M2, 0.1211E+05 M2) **STAR** AREA FS015 630749 5237663 195************************ 30.48 100.00 267.31 620.57 (0.1000E+01 G/S/M2, 0.1659E+06 M2) **STAR** TOTAL 49.12 389.86 1707.48 SUMP= 45.82 363.67 1592.77 SUMA= 3.30 26.19 114.71 WNDA= ************************

APPENDIX E


Appendix E, Page 15

*** ISCST2 - VERSION 93109 *** *** NMC - PM10 - INCREASE FURNACES 5 & 6, MAY 05 - 1992 *** 05/11/05 *** MAY 05 - SITE SPECIFIC MODEL *** 17:34:23 C:\PROJECTS\NMCMAY05\MAY_16TH\PMTSCENB\PM92N.OUT **This Run Includes: 19 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 16

*** ISCST3 - VERSION 02035 *** *** PM10 PSD - MAY 05 REGULATORY MODEL - 1992 - SCENARIO B *** 05/11/05 *** FURNACE 5 - 5 CONC STACKS INTO BUILDING, CHANGE FRN 5&6 *** 17:48:36 C:\PROJECTS\NMCMAY05\MAY_16TH\PMTSCENB\PM92RB.OUT **This Run Includes: 101 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 17


APPENDIX E


Appendix E, Page 18


AREA COALYARD 631388 5238258 185 0.50 3.98 17.45 20.00 65.62 100.00 200.00 (0.2510E-04 G/S/M2, 0.2000E+05 M2) AREA COREPLNT 631362 5238461 194 0.81 6.41 28.07 15.00 49.21 110.03 110.03 (0.6670E-04 G/S/M2, 0.1211E+05 M2) AREA PELLSTOR 630749 5237663 194 1.99 15.80 69.19 30.48 100.00 267.31 620.57 (0.1200E-04 G/S/M2, 0.1659E+06 M2) AREA FS003 631388 5238258 19120000.00**************** 20.00 65.62 100.00 200.00 (0.1000E+01 G/S/M2, 0.2000E+05 M2) **STAR** AREA FS007 630749 5237663 195************************ 30.48 100.00 267.31 620.57 (0.1000E+01 G/S/M2, 0.1659E+06 M2) **STAR** AREA FS012 631362 5238461 19312106.6096084.13******** 15.00 49.21 110.03 110.03 (0.1000E+01 G/S/M2, 0.1211E+05 M2) **STAR** AREA FS015 630749 5237663 195************************ 30.48 100.00 267.31 620.57 (0.1000E+01 G/S/M2, 0.1659E+06 M2) **STAR** TOTAL 48.65 386.09 1690.97 SUMP= 45.35 359.90 1576.26 SUMA= 3.30 26.19 114.71 WNDA= ************************

APPENDIX E


Appendix E, Page 19

*** ISCST2 - VERSION 93109 *** *** NMC - PM10 - INCREASE FURNACES 5 & 6, MAY 05 - 1992 *** 05/11/05 *** MAY 05 - SITE SPECIFIC MODEL *** 17:34:23 C:\PROJECTS\NMCMAY05\MAY_16TH\PMTSCENC\PM92N.OUT **This Run Includes: 19 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 20

*** ISCST3 - VERSION 02035 *** *** PM10 CHANGE FURNACES 5 & 6 - MAY 05 - SCENARIO C - 1992 *** 05/11/05 *** CONCENTRATOR LINES 1-8 NOT OPERATING - VENT 4 INSIDE (SV045,46,47,51) *** 18:01:18 C:\PROJECTS\NMCMAY05\MAY_16TH\PMTSCENC\PM92RC.OUT **This Run Includes: 101 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 21


APPENDIX E


Appendix E, Page 22


AREA COALYARD 631388 5238258 185 0.50 3.98 17.45 20.00 65.62 100.00 200.00 (0.2510E-04 G/S/M2, 0.2000E+05 M2) AREA COREPLNT 631362 5238461 194 0.81 6.41 28.07 15.00 49.21 110.03 110.03 (0.6670E-04 G/S/M2, 0.1211E+05 M2) AREA PELLSTOR 630749 5237663 194 1.99 15.80 69.19 30.48 100.00 267.31 620.57 (0.1200E-04 G/S/M2, 0.1659E+06 M2) AREA FS003 631388 5238258 19120000.00**************** 20.00 65.62 100.00 200.00 (0.1000E+01G/S/M2, 0.2000E+05 M2) **STAR** AREA FS007 630749 5237663 195************************ 30.48 100.00 267.31 620.57 (0.1000E+01 G/S/M2, 0.1659E+06 M2) **STAR** AREA FS012 631362 5238461 19312106.6096084.13******** 15.00 49.21 110.03 110.03 (0.1000E+01 G/S/M2, 0.1211E+05 M2) **STAR** AREA FS015 630749 5237663 195************************ 30.48 100.00 267.31 620.57 (0.1000E+01 G/S/M2, 0.1659E+06 M2) **STAR** TOTAL 48.81 387.40 1696.71 SUMP= 45.51 361.21 1582.00 SUMA= 3.30 26.19 114.71 WNDA= ************************

APPENDIX E


Appendix E, Page 23

*** ISCST2 - VERSION 93109 *** *** NMC - PM10 PSD - SITE SPECIFIC MODEL - 1992 *** 01/07/05 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 15:25:36 C:\PROJECTS\NMCMAY05\MAY_16TH\PMISCENA\PMI9204N.OUT **This Run Includes: 22 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 0.00 0.00 0.00 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 0.00 0.00 0.00 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.00 0.00 0.00 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV101 631339 5238341 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113 631371 5238367 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV261 631241 5238189 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266E 631253 5238206 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV266C 631253 5238206 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267C 631250 5238201 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268C 631245 5238194 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 TOTAL 0.61 4.84 21.20

APPENDIX E


Appendix E, Page 24

*** ISCST3 - VERSION 02035 *** *** NMC - PM10 PSD - REGULATORY MODEL - 1992 - SCENARIO A *** 01/07/05 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 15:25:43 C:\PROJECTS\NMCMAY05\MAY_16TH\PMISCENA\PMI924RA.OUT **This Run Includes: 136 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM

POINT SV001 631531 5238473 192 0.00 0.00 0.00 65.84 216.01 2.290 7.513 422. 149. 300. 26.46 5208.66 230917 POINT SV002 631552 5238492 192 0.00 0.00 0.00 65.84 216.01 3.110 10.203 422. 149. 300. 18.65 3671.26 300190 POINT SV003 631472 5238483 193 0.00 0.00 0.00 39.93 131.00 1.980 6.496 505. 232. 450. 9.17 1805.12 59827 POINT SV005 631537 5238506 193 0.00 0.00 0.00 39.01 127.99 0.460 1.509 298. 25. 77. 12.92 2543.31 4550 POINT SV007C 631207 5238929 268 0.11 0.87 3.82 25.30 83.01 1.520 4.987 298. 25. 77. 16.18 3185.04 62210 POINT SV008C 631225 5238954 268 0.10 0.80 3.51 25.30 83.01 1.520 4.987 298. 25. 77. 16.18 3185.04 62210 POINT SV009C 631270 5238858 239 0.06 0.48 2.09 30.78 100.98 1.830 6.004 298. 25. 77. 16.18 3185.04 90173 POINT SV010C 631316 5238926 238 0.06 0.48 2.09 30.78 100.98 1.830 6.004 298. 25. 77. 16.18 3185.04 90173 POINT SV011E 631282 5238839 235 -0.04 -0.29 -1.29 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV011C 631282 5238839 235 0.04 0.32 1.39 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT CRSH5E 631282 5238839 235 -0.04 -0.29 -1.29 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV012C 631289 5238848 234 0.01 0.10 0.42 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV013C 631295 5238857 233 0.01 0.08 0.35 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV014C 631301 5238867 233 0.01 0.10 0.42 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV015C 631306 5238874 233 0.01 0.12 0.52 21.03 69.00 1.010 3.314 298. 25. 77. 13.32 2622.05 22612 POINT SV016C 631314 5238885 233 0.01 0.12 0.52 21.03 69.00 1.010 3.314 298. 25. 77. 13.32 2622.05 22612 POINT SV017C 631323 5238897 232 0.01 0.08 0.35 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV018C 631329 5238906 233 0.01 0.08 0.35 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV019C 631334 5238915 233 0.01 0.08 0.35 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV020E 631341 5238924 233 -0.04 -0.30 -1.32 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV020C 631341 5238924 233 0.04 0.29 1.29 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT CR105E 631341 5238924 233 -0.04 -0.30 -1.32 21.03 69.00 0.820 2.690 298. 25. 77. 13.32 2622.05 14905 POINT SV021C 631405 5238740 218 0.09 0.75 3.30 43.10 141.40 1.590 5.217 298. 25. 77. 16.03 3155.51 67441 POINT SV022C 631472 5238837 217 0.09 0.75 3.30 43.10 141.40 1.590 5.217 298. 25. 77. 16.03 3155.51 67441 POINT SV023C 631417 5238757 218 0.08 0.65 2.85 43.10 141.40 1.460 4.790 298. 25. 77. 16.31 3210.63 57857 POINT SV024C 631439 5238789 217 0.04 0.28 1.22 43.10 141.40 0.980 3.215 298. 25. 77. 15.15 2982.28 24214 POINT SV025C 631461 5238820 217 0.05 0.44 1.91 43.10 141.40 1.220 4.003 298. 25. 77. 15.36 3023.62 38046 POINT SV026 631493 5238765 209 0.00 0.00 0.00 4.88 16.01 0.610 2.001 298. 25. 77. 0.00 0.00 0 POINT SV027 631272 5238442 209 0.00 0.00 0.00 5.79 19.00 0.610 2.001 298. 25. 77. 0.00 0.00 0 POINT SV028 631069 5238585 241 0.00 0.00 0.00 8.84 29.00 0.520 1.706 298. 25. 77. 0.00 0.00 0 POINT SV029 630613 5238326 261 0.00 0.00 0.00 36.88 121.00 0.400 1.312 298. 25. 77. 0.00 0.00 0 POINT SV030E 631448 5238773 216 -0.20 -1.60 -6.99 24.08 79.00 0.820 2.690 298. 25. 77. 15.97 3143.70 17870 POINT SV030C 631448 5238773 216 0.00 0.00 0.00 24.08 79.00 0.820 2.690 298. 25. 77. 15.97 3143.70 17870 POINT SV031E 631456 5238785 216 -0.20 -1.60 -6.99 25.30 83.01 0.820 2.690 298. 25. 77. 15.97 3143.70 17870 POINT SV031C 631456 5238785 216 0.00 0.00 0.00 25.30 83.01 0.820 2.690 298. 25. 77. 15.97 3143.70 17870 POINT SV032E 631411 5238719 216 -0.09 -0.75 -3.27 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV033E 631397 5238698 216 -0.09 -0.75 -3.27 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV034E 631383 5238678 216 -0.09 -0.75 -3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV035E 631368 5238657 216 -0.09 -0.75 -3.27 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV036E 631354 5238636 216 -0.09 -0.73 -3.20 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV037E 631340 5238616 216 -0.10 -0.77 -3.37 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV033C 631397 5238698 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV034C 631383 5238678 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV035C 631368 5238657 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437

APPENDIX E


Appendix E, Page 25

POINT SV036C 631354 5238636 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV037C 631340 5238616 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038E 631326 5238595 216 -0.09 -0.72 -3.16 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038C 631326 5238595 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039E 631311 5238574 216 -0.09 -0.72 -3.16 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039C 631311 5238574 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040E 631293 5238547 215 -0.09 -0.71 -3.09 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040C 631293 5238547 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041E 631278 5238527 215 -0.09 -0.71 -3.09 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041C 631278 5238527 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV042E 631264 5238506 215 -0.14 -1.15 -5.04 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV043 631250 5238485 215 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV044E 631473 5238809 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV045E 631487 5238829 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV046E 631501 5238849 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV047E 631515 5238871 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV048E 631529 5238891 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV049E 631544 5238911 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV050E 631558 5238933 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV051E 631572 5238953 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV276E 631591 5238980 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV053E 631605 5239001 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV070 631256 5238333 203 0.00 0.00 0.00 2.44 8.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV071 631256 5238337 203 0.00 0.00 0.00 16.46 54.00 0.400 1.312 298. 25. 77. 0.00 0.00 0 POINT SV072 631288 5238310 199 0.00 0.00 0.00 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV073 631286 5238306 199 0.00 0.00 0.00 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV074 631277 5238287 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV075 631255 5238256 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV076 631233 5238224 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV077 631275 5238342 201 0.00 0.00 0.00 14.02 46.00 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV078 631316 5238399 201 0.00 0.00 0.00 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV079 631277 5238345 201 0.00 0.00 0.00 14.02 46.00 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV080 631318 5238402 201 0.00 0.00 0.00 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV081 631311 5238408 202 0.00 0.00 0.00 34.75 114.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV082 631318 5238420 202 0.00 0.00 0.00 34.75 114.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV083 631321 5238423 202 0.00 0.00 0.00 39.01 127.99 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV084 631332 5238427 202 0.00 0.00 0.00 35.66 116.99 0.520 1.706 298. 25. 77. 0.00 0.00 0 POINT SV097 631351 5238393 198 0.00 0.00 0.00 8.84 29.00 0.980 3.215 339. 66. 150. 0.00 0.00 0 POINT SV101 631339 5238341 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113 631371 5238367 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV120 631384 5238301 196 0.00 0.00 0.00 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV121 631406 5238332 195 0.00 0.00 0.00 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV122 631388 5238298 195 0.00 0.00 0.00 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV123 631409 5238329 195 0.00 0.00 0.00 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123

APPENDIX E


Appendix E, Page 26

POINT SV124 631381 5238283 195 0.00 0.00 0.00 28.65 94.00 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV125 631402 5238314 195 0.00 0.00 0.00 17.98 58.99 1.220 4.003 328. 54. 130. 14.57 2868.11 36089 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV202 631924 5239090 203 0.00 0.00 0.00 13.72 45.01 0.300 0.984 336. 63. 146. 0.00 0.00 0 POINT SV203 632061 5239154 212 0.00 0.00 0.00 1.22 4.00 0.530 1.739 384. 111. 231. 0.00 0.00 0 POINT F101E 631303 5238276 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F102E 631300 5238272 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F103E 631297 5238268 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F1DSE 631342 5238253 196 -0.27 -2.17 -9.52 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F201E 631293 5238261 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F202E 631290 5238256 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F203E 631286 5238251 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F2DSE 631330 5238236 196 -0.26 -2.04 -8.93 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F301E 631282 5238245 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F302E 631297 5238242 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F303E 631275 5238236 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F3DSE 631319 5238221 196 -0.36 -2.87 -12.58 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F401E 631271 5238229 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F402E 631268 5238225 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F403E 631265 5238220 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F4DSE 631309 5238204 196 -0.27 -2.14 -9.39 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT SV261 631241 5238189 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV265 631288 5238171 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 339. 66. 150. 13.26 2610.24 32844 POINT SV266E 631253 5238206 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV266C 631253 5238206 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV267C 631250 5238201 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV268C 631245 5238194 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV269E 631299 5238187 196 -0.28 -2.22 -9.73 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT SV269C 631299 5238187 196 0.38 3.02 13.21 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 AREA SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) XDIM(M) YDIM(M)

AREA COALYARD 631388 5238258 185 0.00 0.00 0.00 20.00 65.62 100.00 200.00 (0.0000E+00 G/S/M2, 0.2000E+05 M2) AREA COREPLNT 631362 5238461 194 0.00 0.00 0.00 15.00 49.21 110.03 110.03 (0.0000E+00 G/S/M2, 0.1211E+05 M2) AREA PELLSTOR 630749 5237663 194 0.00 0.00 0.00 30.48 100.00 267.31 620.57 (0.0000E+00 G/S/M2, 0.1659E+06 M2) AREA FS003 631388 5238258 191 0.00 0.00 0.00 20.00 65.62 100.00 200.00 (0.0000E+00 G/S/M2, 0.2000E+05 M2) **STAR** AREA FS007 630749 5237663 195 0.00 0.00 0.00 30.48 100.00 267.31 620.57 (0.0000E+00 G/S/M2, 0.1659E+06 M2) **STAR** AREA FS012 631362 5238461 193 0.00 0.00 0.00 15.00 49.21 110.03 110.03 (0.0000E+00 G/S/M2, 0.1211E+05 M2) **STAR** AREA FS015 630749 5237663 195 0.00 0.00 0.00 30.48 100.00 267.31 620.57 (0.0000E+00 G/S/M2, 0.1659E+06 M2) **STAR** TOTAL -8.91 -70.70 -309.64

APPENDIX E


Appendix E, Page 27

*** ISCST2 - VERSION 93109 *** *** NMC - PM10 PSD - SITE SPECIFIC MODEL - 1992 *** 01/07/05 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 15:25:36 C:\PROJECTS\NMCMAY05\MAY_16TH\PMISCENB\PMI9204N.OUT **This Run Includes: 22 Source(s); 1 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 28

*** ISCST3 - VERSION 02035 *** *** NMC - PM10 PSD - REGULATORY MODEL - 1992 - SCENARIO B *** 02/10/05 *** FURNACE 5 - CLASS II INCREMENT - 2004 *** 11:12:43 C:\PROJECTS\NMCMAY05\MAY_16TH\PMISCENB\PMI924RB.OUT **This Run Includes: 136 Source(s); 2 Source Group(s); and 677 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 29

POINT SV036C 631354 5238636 216 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV037C 631340 5238616 216 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038E 631326 5238595 216 -0.09 -0.72 -3.16 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038C 631326 5238595 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039E 631311 5238574 216 -0.09 -0.72 -3.16 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039C 631311 5238574 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040E 631293 5238547 215 -0.09 -0.71 -3.09 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040C 631293 5238547 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041E 631278 5238527 215 -0.09 -0.71 -3.09 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041C 631278 5238527 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV042E 631264 5238506 215 -0.14 -1.15 -5.04 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV043 631250 5238485 215 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV044E 631473 5238809 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV045E 631487 5238829 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV046E 631501 5238849 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV047E 631515 5238871 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV048E 631529 5238891 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV049E 631544 5238911 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV050E 631558 5238933 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV051E 631572 5238953 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV276E 631591 5238980 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV053E 631605 5239001 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV070 631256 5238333 203 0.00 0.00 0.00 2.44 8.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV071 631256 5238337 203 0.00 0.00 0.00 16.46 54.00 0.400 1.312 298. 25. 77. 0.00 0.00 0 POINT SV072 631288 5238310 199 0.00 0.00 0.00 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV073 631286 5238306 199 0.00 0.00 0.00 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV074 631277 5238287 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV075 631255 5238256 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV076 631233 5238224 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV077 631275 5238342 201 0.00 0.00 0.00 14.02 46.00 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV078 631316 5238399 201 0.00 0.00 0.00 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV079 631277 5238345 201 0.00 0.00 0.00 14.02 46.00 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV080 631318 5238402 201 0.00 0.00 0.00 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV081 631311 5238408 202 0.00 0.00 0.00 34.75 114.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV082 631318 5238420 202 0.00 0.00 0.00 34.75 114.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV083 631321 5238423 202 0.00 0.00 0.00 39.01 127.99 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV084 631332 5238427 202 0.00 0.00 0.00 35.66 116.99 0.520 1.706 298. 25. 77. 0.00 0.00 0 POINT SV097 631351 5238393 198 0.00 0.00 0.00 8.84 29.00 0.980 3.215 339. 66. 150. 0.00 0.00 0 POINT SV101 631339 5238341 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV113 631371 5238367 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV120 631384 5238301 196 0.00 0.00 0.00 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV121 631406 5238332 195 0.00 0.00 0.00 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV122 631388 5238298 195 0.00 0.00 0.00 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV123 631409 5238329 195 0.00 0.00 0.00 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123

APPENDIX E


Appendix E, Page 30

POINT SV124 631381 5238283 195 0.00 0.00 0.00 28.65 94.00 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV125 631402 5238314 195 0.00 0.00 0.00 17.98 58.99 1.220 4.003 328. 54. 130. 14.57 2868.11 36089 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV202 631924 5239090 203 0.00 0.00 0.00 13.72 45.01 0.300 0.984 336. 63. 146. 0.00 0.00 0 POINT SV203 632061 5239154 212 0.00 0.00 0.00 1.22 4.00 0.530 1.739 384. 111. 231. 0.00 0.00 0 POINT F101E 631303 5238276 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F102E 631300 5238272 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F103E 631297 5238268 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F1DSE 631342 5238253 196 -0.27 -2.17 -9.52 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F201E 631293 5238261 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F202E 631290 5238256 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F203E 631286 5238251 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F2DSE 631330 5238236 196 -0.26 -2.04 -8.93 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F301E 631282 5238245 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F302E 631297 5238242 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F303E 631275 5238236 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F3DSE 631319 5238221 196 -0.36 -2.87 -12.58 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F401E 631271 5238229 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F402E 631268 5238225 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F403E 631265 5238220 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F4DSE 631309 5238204 196 -0.27 -2.14 -9.39 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT SV261 631241 5238189 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV265 631288 5238171 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 339. 66. 150. 13.26 2610.24 32844 POINT SV266E 631253 5238206 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV266C 631253 5238206 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV267C 631250 5238201 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV268C 631245 5238194 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV269E 631299 5238187 196 -0.28 -2.22 -9.73 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT SV269C 631299 5238187 196 0.38 3.02 13.21 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 AREA SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) XDIM(M) YDIM(M)


APPENDIX E


Appendix E, Page 31

*** ISCST2 - VERSION 93109 *** *** NMC - PM10 PSD - SITE SPECIFIC MODEL - 1992 *** 02/18/05 *** FURNACE 5 - CLASS II INCREMENT - INTERIM *** 19:19:37 C:\PROJECTS\NMCMAY05\MAY_16TH\PMISCENC\PMI92N5.OUT **This Run Includes: 22 Source(s); 1 Source Group(s); and 529 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 32

*** ISCST3 - VERSION 02035 *** *** NMC - PM10 PSD - REGULATORY MODEL - 1992 *** 02/18/05 *** FURNACE 5 - CLASS II INCREMENT - INTERIM *** 19:19:54 C:\PROJECTS\NMCMAY05\MAY_16TH\PMISCENC\PMI92R5.OUT **This Run Includes: 143 Source(s); 2 Source Group(s); and 529 Receptor(s) POINT SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) DIA(M) DIA(FT) DEG(K) DEG(C) DEG(F) VS(M/S) VS(F/M) ACFM


APPENDIX E


Appendix E, Page 33

POINT SV036C 631354 5238636 216 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV037C 631340 5238616 216 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038E 631326 5238595 216 -0.09 -0.72 -3.16 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV038C 631326 5238595 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039E 631311 5238574 216 -0.09 -0.72 -3.16 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV039C 631311 5238574 216 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040E 631293 5238547 215 -0.09 -0.71 -3.09 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV040C 631293 5238547 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041E 631278 5238527 215 -0.09 -0.71 -3.09 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV041C 631278 5238527 215 0.09 0.75 3.30 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV042E 631264 5238506 215 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV042C 631264 5238506 215 0.00 0.00 0.00 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV043C 631250 5238485 215 0.20 1.59 6.95 34.75 114.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV044E 631473 5238809 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV044C 631473 5238809 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV045E 631487 5238829 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV046E 631501 5238849 215 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV047E 631515 5238871 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV048E 631529 5238891 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV048C 631529 5238891 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV049E 631544 5238911 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV049C 631544 5238911 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV050E 631558 5238933 215 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV050C 631558 5238933 215 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV051E 631572 5238953 216 -0.14 -1.15 -5.04 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV276E 631591 5238980 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV276C 631591 5238980 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV053E 631605 5239001 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV053C 631605 5239001 216 0.00 0.00 0.00 28.35 93.01 1.010 3.314 298. 25. 77. 17.34 3413.39 29437 POINT SV070 631256 5238333 203 0.00 0.00 0.00 2.44 8.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV071 631256 5238337 203 0.00 0.00 0.00 16.46 54.00 0.400 1.312 298. 25. 77. 0.00 0.00 0 POINT SV072 631288 5238310 199 0.00 0.00 0.00 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV073 631286 5238306 199 0.00 0.00 0.00 25.91 85.01 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV074 631277 5238287 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV075 631255 5238256 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV076 631233 5238224 198 0.00 0.00 0.00 26.82 87.99 0.490 1.608 298. 25. 77. 0.00 0.00 0 POINT SV077 631275 5238342 201 0.00 0.00 0.00 14.02 46.00 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV078 631316 5238399 201 0.00 0.00 0.00 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV079 631277 5238345 201 0.00 0.00 0.00 14.02 46.00 0.240 0.787 298. 25. 77. 0.00 0.00 0 POINT SV080 631318 5238402 201 0.00 0.00 0.00 29.57 97.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV081 631311 5238408 202 0.00 0.00 0.00 34.75 114.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV082 631318 5238420 202 0.00 0.00 0.00 34.75 114.01 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV083 631321 5238423 202 0.00 0.00 0.00 39.01 127.99 0.210 0.689 298. 25. 77. 0.00 0.00 0 POINT SV084 631332 5238427 202 0.00 0.00 0.00 35.66 116.99 0.520 1.706 298. 25. 77. 0.00 0.00 0 POINT SV097 631351 5238393 198 0.00 0.00 0.00 8.84 29.00 0.980 3.215 339. 66. 150. 0.00 0.00 0 POINT SV101 631339 5238341 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV102 631344 5238339 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401 POINT SV103 631348 5238336 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV104 631334 5238299 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV105 631343 5238292 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV111 631362 5238373 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 12.71 2501.97 70834 POINT SV112 631366 5238370 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.35 2627.95 74401

APPENDIX E


Appendix E, Page 34

POINT SV113 631371 5238367 197 0.00 0.00 0.00 36.88 121.00 1.830 6.004 334. 61. 142. 13.90 2736.22 77466 POINT SV114 631355 5238332 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV115 631363 5238326 197 0.00 0.00 0.00 40.84 133.99 1.830 6.004 333. 60. 140. 16.70 3287.40 93071 POINT SV120 631384 5238301 196 0.00 0.00 0.00 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV121 631406 5238332 195 0.00 0.00 0.00 27.74 91.01 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV122 631388 5238298 195 0.00 0.00 0.00 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV123 631409 5238329 195 0.00 0.00 0.00 27.43 89.99 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV124 631381 5238283 195 0.00 0.00 0.00 28.65 94.00 1.160 3.806 339. 66. 150. 21.49 4230.31 48123 POINT SV125 631402 5238314 195 0.00 0.00 0.00 17.98 58.99 1.220 4.003 328. 54. 130. 14.57 2868.11 36089 POINT SV201 631973 5239055 203 0.00 0.00 0.00 27.16 89.11 1.070 3.510 340. 67. 152. 16.46 3240.16 31361 POINT SV202 631924 5239090 203 0.00 0.00 0.00 13.72 45.01 0.300 0.984 336. 63. 146. 0.00 0.00 0 POINT SV203 632061 5239154 212 0.00 0.00 0.00 1.22 4.00 0.530 1.739 384. 111. 231. 0.00 0.00 0 POINT F101E 631303 5238276 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F102E 631300 5238272 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F103E 631297 5238268 197 -0.56 -4.44 -19.43 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F1DSE 631342 5238253 196 -0.27 -2.17 -9.52 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F201E 631293 5238261 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F202E 631290 5238256 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F203E 631286 5238251 197 -0.52 -4.15 -18.18 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F2DSE 631330 5238236 196 -0.26 -2.04 -8.93 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F301E 631282 5238245 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F302E 631297 5238242 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F303E 631275 5238236 197 -0.74 -5.84 -25.58 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F3DSE 631319 5238221 196 -0.36 -2.87 -12.58 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT F401E 631271 5238229 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT F402E 631268 5238225 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT F403E 631265 5238220 197 -0.55 -4.36 -19.08 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT F4DSE 631309 5238204 196 -0.27 -2.14 -9.39 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT SV261 631241 5238189 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV262 631238 5238185 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV263 631235 5238178 197 0.00 0.00 0.00 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV265 631288 5238171 196 0.00 0.00 0.00 27.43 89.99 1.220 4.003 339. 66. 150. 13.26 2610.24 32844 POINT SV266E 631253 5238206 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV266C 631253 5238206 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 12.71 2501.97 70834 POINT SV267E 631250 5238201 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV267C 631250 5238201 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.35 2627.95 74401 POINT SV268E 631245 5238194 197 -0.57 -4.52 -19.81 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV268C 631245 5238194 197 0.77 6.14 26.88 49.38 162.01 1.830 6.004 333. 60. 140. 13.90 2736.22 77466 POINT SV269E 631299 5238187 196 -0.28 -2.22 -9.73 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 POINT SV269C 631299 5238187 196 0.38 3.02 13.21 27.43 89.99 1.220 4.003 334. 61. 141. 13.26 2610.24 32844 AREA SRCIDNT EASTING NORTHING ELEV(M) G/SEC #/HOUR T/YEAR HGT(M) HGT(FT) XDIM(M) YDIM(M)


APPENDIX E


Appendix E, Page 35

APPENDIX F


Appendix F, Page 1

Insignificant Activities: The table below lists the insignificant activities that are allowed at the facility and their associated applicable requirements.

Minn. R. 7007.1300, subpart

Rule Description of the Activity Applicable Requirement

3(G) Emissions from a laboratory, as defined in the subpart. Northshore Mining ‐ Silver Bay operates a quality control laboratory.

Minn. R. 7011.0710/0715

3(H)(3)

Brazing, soldering or welding equipment. Northshore Mining ‐ Silver Bay operates welding machines.

Minn. R. 7011.0710/0715

3(H)(7) Cleaning operations: alkaline/phosphate cleaners and associated cleaners and associated burners. Northshore Mining ‐ Silver Bay uses solvent based parts washers.

Minn. R. 7011.0710/0715

3(I) Individual emissions units at a stationary source, each of which have a potential to emit the following pollutants in amounts less than: 1. 4,000 lbs/year of carbon monoxide; 2. 2,000 lbs/year each of nitrogen oxide, sulfur dioxide, particulate matter, particulate matter less than ten microns, volatile organic compounds (including hazardous air pollutant‐containing VOC), and ozone; and 3. 1,000 tons/year of CO2e Northshore Mining ‐ Silver Bay has a crusher zincing furnace (melts zinc for crusher relining), a METCO 5P thermospray gun for powder‐coating small parts, four emergency use generators, a Radiac hose cutoff saw, an acetic acid aboveground storage tank (7,000 gallons), a Frother underground storage tank (15,000 gallons), a MP7 truck shop space heater (Propane fueled, 3.4 MMBtu), a soda ash mix tank, soda ash unloading (vented indoors), filter cake loadout conveyors (two belts), and an additive silo (over filter cake belts).

Minn. R. 7011.0610 Minn. R. 7011.0710/0715 Minn. R. 7001.2300

3(J) Fugitive Emissions from roads and parking lots. Minn. R. 7011.0150

3(K) Infrequent use of spray paint equipment for routine housekeeping or plant upkeep activities not associated with primary production processes at the stationary source, such

Minn. R. 7011.0715

APPENDIX F


Appendix F, Page 2

Minn. R. 7007.1300, subpart

Rule Description of the Activity Applicable Requirement

as spray painting of buildings, machinery, vehicles, and other supporting equipment.

APPENDIX F


Appendix F, Page 3

EXHIBIT M


Exhibit M, Page 1

Ambient Air Monitoring Procedures for the Determination of Compliance 1. General

This exhibit shall apply to all emission facilities that are required to perform ambient air monitoring in order to demonstrate compliance of State and Federal ambient air quality standards or permit conditions, unless otherwise stated by special conditions of the permit.

2. Network design for criteria and non criteria pollutants

All air monitoring networks intending to demonstrate attainment with State and Federal ambient air quality standards must comply with the requirements in the Code of Federal Regulations Title 40 Part 58.14.

Location, number of monitors, parameters and duration of the study shall be determined through the permit process.

3. Probe and Siting Criteria

Probe siting and placement for criteria pollutants must comply with specifications described in the Code of Federal Regulations Title 40 Part 58 Appendix E. Each monitoring site must have a site and monitor information form completed prior to submission of data. (see attached appendix) Probe siting for non criteria pollutants must meet requirements prescribed in the approved method for the target parameter (see par. 4. Monitoring Methods).

4. Monitoring Methods

All criteria pollutants must be measured by U.S. EPA reference or equivalent methods, approved in accordance to Title 40 Part 58 Appendix C of the Federal Code of Regulations.

A list of "Designated Reference and Equivalent Methods" and "Acceptable Methods for Non criteria Pollutants" may be obtained by writing to:

U.S. ENVIRONMENTAL PROTECTION AGENCY OFFICE OF RESEARCH AND DEVELOPMENT ATMOSPHERIC RESEARCH AND EXPOSURE ASSESSMENT LABORATORY QUALITY ASSURANCE DIVISION (MD-77) RESEARCH TRIANGLE PARK, NC 27711

The MPCA must be informed of any method change performed during the monitoring project. The method change must be reported within 45 working days from the end the reporting quarter in which the change took place.

Non criteria pollutants must be measured by methods approved by the U.S. EPA. If no method exists, MPCA will suggest candidate methods recommended by the U.S. EPA or other methodology.

EXHIBIT M


Exhibit M, Page 2

5. Monitoring Plan / Quality Assurance Project Plan

Permittee or operator must submit a monitoring plan that incorporates a quality assurance plan to the MPCA; Environmental Outcomes Division, Air Monitoring Unit, Supervisor at least 30 days prior the start date of the air monitoring project. The Agency shall review the monitoring and quality assurance plans to ensure compliance with EPA requirements of monitoring networks and determine whether adequate quality control measures are utilized to ensure acceptable levels of quality data.

A) Elements of Monitoring plan / Quality Assurance Project Plan

The primary guidance for developing a quality assurance plan is specified in the Code of Federal Regulations 40 Part 58 Appendix A.

In general, the following elements must be addressed in a monitoring plan.

1. General description of monitors and monitor location. 2. Description of calibration methods and reference standards. 3. Sampling schedule for manual methods. 4. Summary of standard operating procedures. 5. Description of routine quality control checks, including frequency. 6. Control limits for zero, span and other control checks including audits. 7. Performance audit procedures and reference standard traceability. 8. Plan of action when monitors fail to meet control/audit limits. 9. Recording and validating data. 10. Format of data submission.

B) Audits

In addition to the quality assurance program developed by the Permittee, the MPCA will conduct performance and systems audits on all criteria pollutant monitors. A similar audit format will be designed for non criteria pollutants dependent upon pollutant parameters. The permit process may determine frequency of scheduled MPCA audits.

6. Data Submittal

All Permittees required to submit data to the agency must do so no later than 45 working days past the end of each calendar quarter. Monitoring site information, monitoring data and quality control results must be compliant with submission requirements of the MPCA “Ambient Air Quality Data Submission Standard.” (Appendix A to Exhibit M) All data shall be submitted to the following address:

Minnesota Pollution Control Agency Environmental Outcomes Division Air Monitoring Unit – Supervisor 520 Lafayette Road St. Paul, MN 55155-4194

EXHIBIT M


Exhibit M, Page 3

A) Criteria Pollutants

The Permittee shall include the following data assessment information (as per CFR Title 40 Part. 58 App. A.) for each sampling quarter.

1. For automated analyzers -- precision probability limits from section 4.1 and percentage differences from section 4.2 of CFR 40 Part 58 App. A, section 5.1.2

2. For manual methods - precision probability limits from section 5.1 and percentage differences from section 5.2 and 5.3 of CFR 40 Part 58 App. A, section 5.3.2

3. All data used to calculate the reported estimates of precision and accuracy including span checks, reference standard certifications, collocated sampler and audit results must be made available to the MPCA upon request.

B) Non criteria Pollutants

Data collected for non criteria pollutants must be accompanied by any pertinent quality control information obtained during the reporting quarter. This would include the following information, where applicable:

1. Sampling train flow rate checks. 2. Field blank data. 3. Analytical blank data. 4. Spiked sample percent recoveries. 5. Calibration check standard results. 6. Internal audit results. 7. Sample Duplicate results

Any documentation deemed necessary to assess reported data including, laboratory and field logbooks, mass spectra data, strip charts and calibration data must be made available to the MPCA upon request.

C) Data Validation

The requirement for data recovery is 75 percent of all data possible from each sampling quarter for automated and manual methods. Minimum recovery for the meteorological parameters of wind speed and wind direction is 80 percent from each sampling quarter.

Data that is determined to be invalid must be deleted from the reported data base. The reasons for invalidation of data must be reported to the MPCA. There should not be any correlation between missing data periods and expected highest concentrations.

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Exhibit M, Page 4

Appendix A to Exhibit M

Ambient Air Quality Data Submission Standard

The Environmental Outcomes Division (EOD) of the Minnesota Pollution Control Agency collects ambient air quality data in order to assess the quality of the air in the state, and to determine compliance with both the National Ambient Air Quality Standards (NAAQS) and Minnesota Ambient Air Quality Standards (MNAAQS). The ambient air quality data is collected from a network of air monitoring stations maintained by the EOD and from networks required of some regulated industries.

Section I. The Minnesota Air Quality Data Handling System

The Minnesota Air Quality Laboratory Information Management System (LIMS) is a computerized data handling system that accepts, stores, and reports information relating to ambient air quality data. The purpose of the LIMS is to compile and organize air monitoring data from all air monitoring networks within the state, into a useful format acceptable to the U.S. EPA. To facilitate this, all information submitted to LIMS must be in a standardized format. Special input formats and a system of codes has been adopted to ensure standardization and ease of data submission on the part of any contributing organization. In addition, a number of edit checks have been instituted to screen data being submitted to the system.

This document specifies the media, file types, data coding formats, and procedures for submitting information related to ambient air quality data to the MPCA. Section II addresses sampling site information, section III addresses air quality data, section IV addresses precision and accuracy data, and section V gives some general information.

There are three distinct classes of information that are accommodated in LIMS: sampling site information, ambient air quality data, and precision and accuracy information. These are described below.

Site information: Site information includes detailed descriptive information about the location and environment of the sampling site and the parameters monitored. This includes the State, county, and city wherein the site is located, the latitude and longitude, or UTM coordinates, of the site and its elevation above local terrain and mean sea level. It also includes a description of the site location (center city, suburban, rural, or remote), the dominating influence on the sampler within approximately a 1-mile radius of the sampling site (industrial, residential, commercial, or mobile), and much more.

Ambient air quality data: That information which must be supplied to LIMS in order to completely characterize the air quality at a site over a specified time interval. This includes the location of the sampling site, the pollutants that are monitored at that site, the methods of collection and analysis of each pollutant monitored, the magnitude of each pollutant concentration, and the time interval over which the measurements are made.

Precision and Accuracy data: That information which must be supplied to LIMS in order to determine the precision and accuracy of collection and analysis methods employed in obtaining ambient air quality data. This includes raw data from bi-monthly precision checks and from quarterly audits.

Site information is submitted only once for each location, although it must be updated whenever the site environment changes. Air quality data are supplied continuously to the EOD by its own network of monitors and periodically by the air quality networks of some regulated industries. Precision and accuracy data are submitted each calendar quarter.

EXHIBIT M


Exhibit M, Page 5

Section II. Sampling Site Information

Before any air quality data from a monitor can be submitted to LIMS, site and monitor information for the monitor must be supplied to the EOD ambient air quality database manager. After the database manager has received the necessary site and monitor information, an identity will be assigned to the monitor. This monitor identity must be used to submit the air quality data from the monitor.

Whenever the site or monitor information changes, the database manager must be notified of the changes. A. Site Information

The information required to establish a new site is listed in Table 1. This information must be sent to the database manager whenever a new site is established.

The information listed in Table 2 is optional. This information is requested to help prevent the misinterpretation of any ambient air quality data that is obtained by a monitor.

The date of the last air quality sample collected by a monitor must be provided when a monitor is removed from a site. This date must be sent to the EOD ambient air quality database manager whenever a site is terminated. All monitors which ever existed at the site must have a date sampling ended before or on the date the site is terminated.

B. Monitor Information

The information required to add a monitor to a site is listed in Table 3. This information must be sent to the EOD ambient air quality database manager whenever a monitor is added to a site. In addition, the information listed in Table 4 is required when a particulate matter (PM10 or TSP) sampler is added to the site.

The information listed in Table 5 is optional. This information is requested to help prevent the misinterpretation of any ambient air quality data that is obtained by a monitor.

The date of the last air quality sample collected by a monitor must be provided when a monitor is removed from a site. This date must be sent to the database manager whenever a monitor is removed.

C. Data submission

Forms are provided on page 9-12 for submitting site and monitor information. Optionally, changes to site or monitor information may be submitted as AIRS formatted transactions along with air quality data or precision and accuracy data. Please follow the gridlines in section III or IV when submitting site or monitor information as AIRS formatted transactions.

Section III. Air Quality Data

The technical specifications for acceptable submission of air quality data are as follows:

1. Medium: 3.5” IBM DOS formatted double-sided (DS); double-sided, double-density (DS, DD); or double-sided, high-density (DS,HD) diskette, or e-mail files to [email protected]

2. Dataset file type: Card Image Formatted file. A Card Image Formatted file is an ASCII text file in which records are 80 characters in length and end with a carriage return and a line feed. Fields are not delimited.

3. Data coding format: Aerometric Information Retrieval System (AIRS) formatted transactions. A transaction is a card Image Format record.

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Exhibit M, Page 6

Section IV. General

All submitted data must adhere to this standard unless; the Environmental Outcomes Division of the MPCA approves an alternative. Failure to comply with this standard will result in the rejection of the submitted data and possible violation of any agreements requiring the submission of ambient monitoring data.

The structure of AIRS formatted transactions can be found in the AIRS User’s Guide. Information necessary of creating AIRS formatted transactions can be found in volumes AQ2 & AQ3. The AIRS User’s Guide can be downloaded via the internet from TTNWeb/AIRS site at www.epa.gov/ttn/airs/airsmans.html#aqs.

All data should be submitted to:

Minnesota Pollution Control Agency Environmental Outcomes Division Air Monitoring Unit – Supervisor 520 Lafayette Road St. Paul, MN 55155-4194

And

Cover letter only to:

Minnesota Pollution Control Agency Metro District-Major Facilities Compliance Tracking Coordinator 520 Lafayette Road St. Paul, MN 55155-4194

Any Questions concerning this standard should be directed to:

Minnesota Pollution Control Agency Environmental Outcomes Division Ambient Air Quality Database Manager 520 Lafayette Road St. Paul, MN 55155-4194

Currently the database manager is Dave Kelso and can be reached at 651-296-7802 or [email protected].

EXHIBIT M


Exhibit M, Page 7

Information Requirements

The following tables define the required fields of the attached forms.

Table 1. Required site information Date site established Date on which a monitoring site began collecting air quality data. Supporting agency Name of agency, company or organization that is responsible for

the operation of the monitoring site. Site name and/or site identification number Name and/or identification number used by the supporting agency. Site address Street number, street name, city and zip code of the monitoring site. State Name of state where the site is located. County Name of county where the site is located. City Name of city where the site is located, or none. Location data Either longitude and latitude, or Universal Transverse Mercator

(UTM) System coordinates. Include method used to determine coordinates and an estimate of the accuracy of the location data.

Land use Identifies the prevalent land use within 1.4 mile of the site. (residential, commercial, industrial, agricultural, forest, desert, mobile, or blighted area)

Street information Street/highway name of any streets/highways close enough to have a significant impact on the site, up to 3 streets may be listed

Type: Arterial, Expressway, Freeway, Major Street or Highway, Through Street or Highway, Local Street or Highway

Distance from monitor to street in meters Direction from site to street The annual average daily traffic (ADT) Location setting Type of environment in which the site is located. (urban, suburban

or rural) Meteorological data Is met data collected for this site? If so, is it collected at this location or at a different location? If it is collected at a different location, what is the location: how

far is it from this site and in what direction?

Table 2. Optional site information: Compass sector True (as opposed to magnetic) direction of the site from the

central business district or monitored source. Elevation MSL Elevation in meters above Mean Sea Level of the site Distance to city Distance in kilometers of the site from the center of the downtown

central business district in which the site is located, or the monitored source.

Description Textual description of the location of the site. Comments Any other useful information.

EXHIBIT M


Exhibit M, Page 8

Table 3. Required monitor information: Parameter Name of parameter monitored by this monitor (e.g. carbon

monoxide, lead, pm-10, hydrogen sulfide, etc.) Poc Parameter occurrence code: 1 for regular monitor, 2 or greater for

co-located monitors. Analyzer manufacturer and model and/or AIRS method code

The 3 digit code assigned to a particular analysis and collection method by the EPA usually associated with an analyzer make and model type.

Analyzing lab Name of laboratory responsible for analysis of air quality measurement samples.

Collection lab Name of laboratory responsible for collection of air quality measurement samples.

Date sampling began Date on which air quality samples were first collected by the monitor.

Probe height Height of sampling probe from ground in meters Project class Designates the type of sampling (population-oriented, source-

oriented, background, special studies, duplicate sampling, complaint investigation etc.).

Dominant source Indicates the primary source of the pollutant being monitored (point, area, mobile)

Measurement scale Denotes the geographic scope of the measurements of air quality data made by this monitor. (see CFR 40 pt. 58, App. D for a discussion of measurement scales for each criteria pollutant)

Monitoring objective Primary reason for measuring air quality data at this monitor (maximum concentration, population-exposure, background, source-oriented; see CFR 40 pt. 58, App. D for more discussion of monitoring objective in relation to measurement scale).

Table 4. Required particulate monitor information (for PM-10 or TSP only): Sampling frequency Frequency of 24-hour samples

(daily, every other day, every sixth day, etc.)

Table 5. Optional monitor information: Probe air flow Is the probe air flow restricted? Obstructions Direction and distance of any obstructions from probe. Obstruction type Type of each obstruction listed: buildings, trees/brush, ridges,

cliffs, structure other than building, etc. Comments Any other useful information.

EXHIBIT M


Exhibit M, Page 9

Ambient Air Monitoring Site Information Form New _____ Change____ Site ID #: _______________ Date established: Date terminated:

Supporting agency: Street address: City: St. Paul State: MN Zip code: 55055

Site name: Site address: City: State: Zip code: County:

Fill in either UTM coordinates OR Latitude / Longitude UTM Coordinates

Zone: North: East:

Longitude and Latitude

deg min sec deg min sec

Latitude: Longitude:

Measurement Information Method of determination: Estimate of accuracy: Datum:

Land Use Check one:

____Residential ____Commercial ____Industrial ____Agricultural

____Forest ____Desert ____Mobile ____Blighted areas

EXHIBIT M


Exhibit M, Page 10

Location Setting Check one:

____Rural ____Suburban ____Urban & City center

Compass Sector: ____ Distance from City: ______ km Elevation MSL: _____ km

Street Information Name Type Direction to Site Annual Daily AVG Year of Traffic Count Traffic Count

1. 2. 3. Type: 1) Arterial 2) Expressway 3) Freeway 4) Major Street 5) Thru Street 6) Local Street

Meteorological Data Is meteorological data collected for this site? Yes ___ No ___ If yes, is it collected at this site or at another site? This site ___ Another site ___ If met data is collected at a different site, fill in the following: Meteorological site ID or name: Distance from site to meteorological site: km Direction from site to meteorological site:

Site Description

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Exhibit M, Page 11

Site ID #: Sampling began __ /__ /_ _ Parameter: Sampling ended __ /__ /_ _

Comments

For office use: AIRS monitor Id:

Collection laboratory: Street address: City: State: Zip code:

Analysis laboratory: Site address: City: State: Zip code:

Analyzer manufacturer: Analyzer model: Collection and Analysis method Code: Serial # MPCA Asset

Project Classification Check one:

____Population-oriented ____Source Oriented ____Background Surveillance ____Complain Invest ____Special Studies ____Episode Monitoring ____Exposure Studies ____Duplicate Sampling ____Continuous Monitoring

EXHIBIT M


Exhibit M, Page 12

Dominant Source Check one:

_____Point _____Area _____Mobile

Measurement Scale Check one:

_____Micro Scale _____Middle Scale _____Neighborhood _____Urban Scale _____Regional

Monitoring Objective Check one:

_____Highest Concentration _____Population Exposure _____General Background _____Source Impact

Monitor Type Check one:

______Unknown ______NAMS ______SLAMS ______Other ______Industrial ______Index

Probe Location Check one:

______Roof Top ______Side of Building ______Support at Ground Level ______Pole ______Other ______Top of Tower (met equipment)

Probe Probe height above ground: Probe distance from support: _______ meters Horizontal____ meters Vertical____ meters

Unrestricted airflow? Yes ____ No ____

Obstructions # Type Direction Distance Height 1 ____ _________ _________ ________ 2 ____ _________ _________ ________ 3 ____ _________ _________ ________ Types: 1) building 2) trees/brush 3) ridges 4) cliffs 5) structure other than building Distance and height in meters. Direction in 8-point compass.

EXHIBIT M


Exhibit M, Page 13

For Particulate (PM10, TSP, or PM2.5) Samplers only:

Req. Sampling Frequency Date effective ____________________ _____/____/_____ ____________________ _____/____/_____ ____________________ _____/____/_____

For “stratified random”, “random”, or “seasonal” sampling frequency fill in the number of samples per month:

Jan.___ Feb.___ Mar.___ Apr.___ May.___ Jun.___

Jul.___ Aug.___ Sep.___ Oct.___ Nov.___ Dec.___

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Exhibit M, Page 14

COMMENTS:

Technical Support Document, Permit Action Number: 07500003‐009 Page 1 of 13

TECHNICAL SUPPORT DOCUMENT

For AIR EMISSION PERMIT NO. 07500003‐010

This technical support document (TSD) is intended for all parties interested in the permit and to meet the requirements that have been set forth by the federal and state regulations (40 CFR § 70.7(a)(5) and Minn. R. 7007.0850, subp. 1). The purpose of this document is to provide the legal and factual justification for each applicable requirement or policy decision considered in the determination to issue the permit. 1. General Information 1.1 Applicant and Stationary Source Location:

Table 1. Applicant and Source Address

Applicant/Address Stationary Source/Address

(SIC Code: 1011)

Cliffs Natural Resources 200 Public Square, Suite 300 Cleveland, OH 44114

Northshore Mining ‐ Silver Bay 10 Outer Dr Silver Bay Lake County, Minnesota 55614

Contact: Jennifer Ramsdell Phone: 218‐226‐6231

Contact: Jennifer RamsdellPhone: 218‐226‐6231

1.2 Facility Description Cliffs Natural Resources, Inc. is the parent company of both Northshore Mining Company and Silver Bay Power Company. Northshore Mining Company operates a taconite processing plant at the Silver Bay facility. Silver Bay Power Company operates a power plant at the Silver Bay facility to provide electricity for the taconite processing operations and the grid. Together, the taconite processing plant and the power plant constitute one source under 40 CFR pt. 52 and pt. 70. The three companies are the Permittee of this Title V permit for the Silver Bay facility. The Silver Bay facility was originally built in the mid‐1950s by Reserve Mining Company and was owned by Cyprus Minerals from 1989 to 1994. Cliffs Natural Resources, formerly Cleveland Cliffs, purchased the Northshore taconite processing facility in 1994. The Silver Bay facility is located north of Duluth, along the north shore of Lake Superior. Through a company owned, 47‐mile railroad, the Northshore plant receives crushed ore that has been processed in the primary and secondary crushers at the Peter Mitchell Mine, near Babbitt, Minnesota. The taconite plant further crushes the ore in tertiary crushers, dry cobs the ore (removes the larger non‐metallic chunks of ore with magnetic separation of the un‐concentrated ore), and then concentrates the iron content from roughly 25 percent to 65 percent in a series of ball mills, rod mills, magnetic concentrators and froth flotation cells. The iron concentrate is then mixed with a variety of binders and fluxing agents (i.e., limestone/dolomite mixture) and formed into small balls referred to as green balls. The green balls are then fired in traveling grate furnaces and indurated into taconite pellets. The pellets are shipped through the Great Lakes system to blast furnaces in the lower Great Lakes and made into a variety of steel products.


The primary air emission units at the Silver Bay facility (the taconite plant and power plant) consist of combustion emissions from the electric generating boilers, steam heating boilers, and indurating furnaces; and particulate matter (PM, PM10 and PM2.5) emissions from rail car unloading, crushed ore storage bins, tertiary crushers, dry cobbers, coarse tailings handling operations, additive storage and handling operations, and fired pellet handling and screening. In addition, there are fugitive particulate emission sources at the plant that are generated by the haul roads, concentrate storage piles, taconite pellet cooling piles, taconite pellet storage piles, pellet transfer operations, pellet ship loadout operations, coal piles, fluxstone piles, coal/fluxstone handling operations, coal ash handling operations, and tailings basin operations. Fabric filters are used to control particulate matter emissions from the two power boilers, rail car unloading operations, tertiary crushers, dry cobbers, coarse tailings handling operations, crushed ore storage bins, pellet screening for the hearth layer, and the additive storage and handling operations. A multiclone is used to control particulate matter emissions from fluxstone handling in the Concentrator (CE 043). The indurating furnaces are controlled with wet‐walled electrostatic precipitators (WWESP) to collect PM as well as sulfur dioxide (SO2), acid gases, and various other air pollutants. Particulate matter emissions from furnace discharges and indoor pellet screening are controlled with wet scrubbers. 1.3 Description of the Activities Allowed by this Permit Action This permit action is for a Moderate Amendment. This permit action authorizes the construction and

operation of four new conveyors (EUs 643‐646) and the addition of two new fugitive sources, a

conveyor transfer to a pile (FS013f) and front end loader activity (FS016h). These units emit particulate

matter emissions (PM/PM10/PM2.5) which are controlled by building enclosures and/or water sprays. The

new conveyors are subject to the New Source Performance Standards (NSPS) for Metallic Mineral

Processing Plants (40 CFR pt. 60, subp. LL).

Under Minn. R. 7007.1450, subp. 7(B), the MPCA authorized construction of EUs 643‐646, FS013f and

FS016h on 10/06/2014.

1.4 Other Permit Changes Several regulations were incorporated into the permit in this action. They include 40 CFR pt. 63, subp. RRRRR (Taconite MACT) and Minn. R. 7007.0502 (Mercury Rule). 1.5 Facility Emissions: The table below is a summary of the emissions increase for the pellet handling modification project. This shows that the pellet handling modification project is not a major modification as it does not result in a significant emissions increase. Because the project did not result in a significant emissions increase, a netting analysis was not required. See Attachment 1 for detailed calculations.


Table 2. Title I Emissions Summary – Actual To Projected Actual Emissions Test

Pollutant

Projected Actual

Emissions *

(tpy)

Baseline Actual

Emissions ** (tpy)

Projected Emissions

Increase Prior to Excludables

*** (tpy)

Excludable Emissions

**** (tpy)

ProjectedLimited Emissions Increase Including

Excludables (tpy)

NSR Significant

Thresholds for Major Sources

(tpy)

NSR Review

Required? (Yes/No)

PM 197 190 19.0 3.56 18.5 25 No

PM10 454 449 14.5 7.15 8.81 15 No

PM2.5 99.1 99.0 2.07 0.85 1.43 10 No

NOx 874 865 9.64 9.64 0 40 No

SO2 32.4 32.3 0.14 0.14 0 40 No

CO 231 229 1.26 8.28 0 100 No

Ozone (VOC)

14.4 14.3 0.05 0.47 0 40 No

CO2e***** 179,000 182,000 6,220 6,220 0 75,000 No

*Projected Actual Emissions as defined in 40 CFR § 52.21(b)(41). Operation of control equipment is accounted for in the projected actual emissions calculations. **Baseline Actual Emissions as defined in 40 CFR § 52.21(b)(48). *** Projected Actual Emissions – Baseline Actual Emissions. This is determined on a unit by unit basis. This table represents the sum of the difference between projected actual emissions minus baseline actual emissions for each unit. For some units, baseline actual emissions are greater than the projected actual emissions; for this situation the difference between projected actuals and baseline actuals is set equal to zero. ****Emissions that can be excluded as detailed in 40 CFR § 52.21(b)(41)(ii)(c). This is determined on a unit by unit basis. Emissions that can be excluded cannot be greater than the projected actual emissions on a unit by unit basis. *****Carbon dioxide equivalents as defined in Minn. R. 7007.0100.

Table 3. Non‐Title I Emissions Increase Summary

The table below provides an overview of the emissions increase due to the new emissions sources. Only emissions of particulate matter are impacted by the new emissions sources at the facility. See Attachment 1 to this TSD for detailed calculations.

Pollutant

After Change (lb/hr)

Before Change (lb/hr)

Net Change* (lb/hr)

Insignificant Modification Thresholds (lb/hr <)

Minor and Moderate

Amendment Thresholds (lb/hr < or >)

Type of Amendment (Minor or Moderate)

PM10 5.76 0 5.76 0.855 3.42 Moderate

NOx ‐‐ ‐‐ ‐‐ 2.28 9.13 NA

SO2 ‐‐ ‐‐ ‐‐ 2.28 9.13 NA

CO ‐‐ ‐‐ ‐‐ 5.70 22.80 NA

VOC ‐‐ ‐‐ ‐‐ 2.28 9.13 NA

Lead ‐‐ ‐‐ ‐‐ 0.025 0.11 NA

*The term ‘Net Change’ is not equivalent to ‘Net Emissions Increase’ as defined at 40 CFR Section 52.21(b)(3).

Table 4. Facility Classification

Classification Major Synthetic Minor/Area Minor/Area

PSD X


Classification Major Synthetic Minor/Area Minor/Area

Part 70 Permit Program X

Part 63 NESHAP X

2. Regulatory and/or Statutory Basis New Source Review The facility is an existing major source under New Source Review regulations. Part 70 Permit Program The facility is a major source under the Part 70 permit program. New Source Performance Standards (NSPS) The three new enclosed conveyors (EUs 643‐645) and the new stacker conveyor (EU646) are subject to the New Source Performance Standards (NSPS) for Metallic Mineral Processing Plants (40 CFR pt. 60, subp. LL). National Emission Standards for Hazardous Air Pollutants (NESHAP) The facility is a major source of HAPs under 40 CFR pt. 63. Existing units at the facility are subject to emissions and operating limits from the Taconite MACT. These requirements have been incorporated into the permit as part of this permit action. Additionally, the units included in this permit action are subject to the work practice standards of the Taconite MACT. Compliance Assurance Monitoring (CAM) CAM does not apply to the modification allowed in this permit amendment, since the emission units being added are not large pollutant specific emission units (PSEUs) or other PSEUs. Environmental Review & Air Emissions Risk Analysis (AERA) The project is not subject to environmental review; an AERA is not required. Minnesota State Rules The new conveyors and fugitive sources are not subject to any Minnesota Standards of Performance. The new fugitive sources are subject to Minnesota Rules for Visible Emissions Restrictions for New Facilities. The existing facility is subject to the Mercury Rule. The initial compliance date with the rule is listed in the permit. The deadline for Northshore to submit a mercury emissions reduction plan is December 30, 2018.

Table 5. Regulatory Overview of Units Affected by the Modification/Permit Amendment The table below provides an overview of the applicable regulations that apply to the new equipment and fugitive sources authorized by this permit action. Subject Item* Applicable Regulations Rationale

FC Title I limit: Reasonable Possibility Recordkeeping 40 CFR § 52.21(r)(6).

The Pellet Handling Modification Project has an emissions increase greater than 50% of the significant emissions increase threshold for PM and PM10. Therefore the Permittee is required to document and maintain the information specified by 40 CFR § 52.21(r)(6)(i)‐(vi).


Subject Item* Applicable Regulations Rationale

GP003‐GP010, GP014‐GP016, GP020

40 CFT pt. 63, subp. RRRRR

National Emissions Standards for Hazardous Air Pollutants: Taconite Iron Ore Processing. Determination of applicable limits from rule:

Rule applies to taconite iron ore processing plants; specifically crushing and handling operations, indurating furnaces, and finished pellet handling operations.

Units constructed before December 18, 2002 are existing units; units constructed or reconstructed after December 18, 2002 are new.

EU643 – EU646 (conveyors – listed separately in permit)

40 CFR pt. 60, subp. LL Standards of Performance for Metallic Mineral Processing Plants. Determination of applicable limits from rule:

Unit constructed after August 24, 1982;

Conveyor belt transfer point meet the definition of affected facility.

Title I limit to avoid major modification, 40 CFR § 52.21

Emission calculations are based upon feed material moisture content

being greater than or equal to 1.5 percent.

FS013f and FS016h (material handling operations – listed separately in permit)

Title I limit to avoid major modification, 40 CFR § 52.21

Emission calculations are based upon feed material moisture content

being greater than or equal to 1.5 percent.

Minn. R. 7011.0110 Minnesota Rules for Visible Emissions Restrictions for New Facilities.

Determination of applicable requirements from rule:

This rule applies when there are no other applicable

standards of performance;

Sources constructed after January 31, 1977.

*Location of the requirement in the permit (e.g., EU, SV, GP, etc.).

3. Technical Information 3.1 Calculations of Potential to Emit –New Emissions Sources Emissions factors for the new conveyors, piles and front end loader activity were calculated based on AP‐42 Chapter 13.2.4 Aggregate Handling and Storage Piles, Equation 1 (11/06). A pellet moisture content of 1.5% was used based on historical facility data and a control efficiency of 80% was assumed for enclosed conveyors because the interior cover collects particulates which are then washed out of the conveyor and collected for addition to the sinter pile. Emissions for the new conveyors, piles and front end loader activity were calculated assuming that all of the pellets flowing through any given point would be stockpiled (i.e. the highest number of possible transfer points) before shipment. Actual emissions from these units will be lower because during shipping months, generally mid‐March through mid‐January, the pellets are shipped directly, to the extent practicable, and not stored in a stockpile. This means that under actual operating conditions there will be fewer material transfer points resulting in lower actual emissions. Attachment 1 to this TSD contains detailed emissions increase spreadsheets and supporting information prepared by the MPCA and the Permittee.


3.2 Actual to Projected Actual Calculations The following calculation methods were applied on a unit by unit basis, per 40 CFR § 52.25(a)(2)(iv). The baseline period used in this analysis is November 2010 through October 2012. Baseline actual emissions were calculated using emissions factors from performance tests when available and from AP‐42 for sources without available performance test data. The facility keeps records of hours of operation for each crusher, concentrator and furnace. This data was used to establish the baseline actual emissions for each crusher, concentrator and furnace as well as for the supporting emissions units (e.g., conveyors, screens, material handling operations, etc.) Projected actual emissions were calculated using the same emissions factors as were used for the baseline actual emissions. For the crushers and concentrators the baseline hours of operation were annualized and then a 1.9% increase in hours of operation over the baseline hours was assumed for determining the projected actual emissions. This is due, in part, from an extra processing step for the alternate pellet product. For furnaces 11 and 12 and supporting emission units, it was assumed that there would be no increase in hours of operation over the baseline hours, therefore the projected actual emissions equal the baseline emissions for these units. The projected hours of operation for supporting emissions units were increased or unchanged from baseline emissions based on what units they support (e.g. crushers, concentrators, or furnaces). For existing conveyors in the pellet yard, the projected actuals show a decrease in emissions because the addition of new conveyors leads to less transfer points and fewer emissions from the existing conveyors. Emissions that could have been accommodated by the emissions units and fugitive sources affected by the modified pellet project were calculated by annualizing the highest monthly hours of operation from the baseline period for each unit. For some units, this resulted in the excluded emissions being greater than the projected emissions. For these units, only the projected actual emissions are excluded (i.e., the projected actual emissions minus the excluded emissions cannot be negative) because a facility is not able to exclude emissions it does not project it will emit. This method conforms to the requirements of 40 CFR §52.21(b)(41) and is supported by EPA memos to the Pennsylvania Department of Environment Protection, April 20, 2010 (Northampton memo) and Georgia‐Pacific Wood Products, March 18, 2010 (Demand Growth memo). Attachment 1 to this TSD contains detailed emissions increase spreadsheets and supporting information prepared by the MPCA and the Permittee. 3.3 Monitoring In accordance with the Clean Air Act, it is the responsibility of the owner or operator of a facility to have sufficient knowledge of the facility to certify that the facility is in compliance with all applicable requirements. In evaluating the monitoring included in the permit, the MPCA considered the following:

the likelihood of the facility violating the applicable requirements;

whether add‐on controls are necessary to meet the emission limits;

the variability of emissions over time;

the type of monitoring, process, maintenance, or control equipment data already available for the emission unit;

the technical and economic feasibility of possible periodic monitoring methods; and

the kind of monitoring found on similar units elsewhere.


The table below summarizes the monitoring requirements associated with this amendment as well as the incorporation of the Taconite MACT into the permit. The changes at the facility do not trigger compliance assurance monitoring (CAM) requirements.

Table 6. Monitoring Subject Item*

Requirement (rule basis) Monitoring Discussion

FC Reasonable Possibility Recordkeeping (40 CFR pt. 52)

Recordkeeping: The Permittee is required to document and maintain the information required by 40 CFR § 52.21(r)(6)‐(7). Reporting: If records indicate that actual emissions exceeded the baseline emissions by a significant amount, the Permittee is required to submit a report to the Commissioner. The report is due 60 days after the end of a calendar year in which the actual emissions exceed baseline emissions by a significant amount.

The project emissions increase is greater than 50% of the significant emissions for PM emissions; therefore, the facility is required to keep records demonstrating that the actual emissions from the emissions units and fugitive sources associated with the pellet handling project does not result in a significant emissions increase as defined by 40 CFR § 52.21(b)(40).

GPs 003‐010, (Ore crushing and handling operations); Additional monitoring requirements found in GP020 for baghouses

Particulate Matter ≤ 0.008 grains/dry standard cubic foot (40 CFR pt. 63, subp. RRRRR)

Performance testing: Units in these groups are subject to reoccurring performance testing. The Permittee may elect to test one representative emission unit per group of six similar units. Monitoring: Bag leak detection system for baghouses associated with units in GPs 003‐010. Implementation of a Bag Leak Detection System Monitoring plan. Monitoring pressure drop, monthly inspections, taking corrective actions as needed. Recordkeeping: Maintain records of pressure drop, control device inspections and corrective actions taken (if any).

These units are controlled by baghouses. Reoccurring performance testing and bag leak detection systems are sufficient to demonstrate compliance with the Taconite MACT (40 CFR pt. 63, subp. RRRRR).


Subject Item*


GP014 (Indurating furnaces)

Particulate Matter ≤ 0.01 grains/dry standard cubic foot; Water flow rate limit: (varies, depending on unit); Secondary voltage limit: (varies, depending on unit); Stack outlet temperature limit: (varies, depending on unit) (40 CFR pt. 63, subp. RRRRR)

Performance testing: Units in these groups are subject to reoccurring performance testing. Performance tests are conducted on each stack of each unit in this group twice per 5 calendar year period. Monitoring: Monitoring water flow rate, secondary voltage and stack outlet temperature limits as determined through initial MPCA approved compliant performance test and recurring testing in which a limit was requested to be reset. Recordkeeping: Maintain records of water flow rate, secondary voltage, stack outlet temperature, and corrective actions taken (if any).

These units are controlled by wet electrostatic precipitators. Reoccurring performance testing and monitoring of water flow rate, secondary voltage and stack outlet temperature are sufficient to demonstrate compliance with the Taconite MACT (40 CFR pt. 63, subp. RRRRR).

GPs 015‐016 (Finished pellet handling operations)

Particulate Matter ≤ 0.008 grains/dry standard cubic foot; Water flow rate limit: (varies, depending on unit); Pressure drop limit: (varies, depending on unit) (40 CFR pt. 63, subp. RRRRR)

Performance testing: Units in these groups are subject to reoccurring performance testing. The Permittee may elect to test one representative emission unit per group of six similar units. Monitoring: Monitoring water flow rate and pressure drop limits as determined through initial MPCA approved compliant performance test and recurring testing in which a limit was requested to be reset. Recordkeeping: Maintain records of water flow rate, pressure drop, and corrective actions taken (if any).

These units are controlled by wet scrubbers. Reoccurring performance testing and monitoring of water flow rate and pressure drop are sufficient to demonstrate compliance with the Taconite MACT (40 CFR pt. 63, subp. RRRRR).


Subject Item*


EU643 – EU646 (conveyors – listed separately in permit)

Opacity ≤ 10% (40 CFR pt. 60, subp. LL)

Monitoring: daily visible emissions checks performed by a trained inspector, monthly inspections of the dust suppression system; Recordkeeping: keep records of visible emissions checks, dust suppression system inspections, and any corrective actions.

Northshore has standard operating procedures for the control and response of any uncaptured particulate matter (PM, PM10 and PM2.5) emissions in the pellet yard. The new units are included in NSM’s Fugitive Dust Control Plan. This area of the facility is staffed 24 hours a day which allows for continual observation for any particulate matter emissions and corrective actions are taken quickly. By continuing to operate in this matter, the Permittee is likely to meet this limit. By recording the visible emissions checks, dust suppression system inspections and any corrective actions, the Permittee is able to demonstrate that compliance with this limit is achieved.

Pellet Moisture Content ≥ 1.5% (Limit to avoid major modification under NSR)

Monitoring: daily visible emissions checks performed by a trained inspector, monthly inspections of the dust suppression system; Recordkeeping: keep records of visible emissions checks, dust suppression system inspections, and any corrective actions.

The monitoring for compliance with the opacity limit is sufficient for demonstrating compliance with the moisture content limit.


Subject Item*


FS013f and FS016h (material handling operations – listed separately in permit)

Pellet Moisture Content ≥ 1.5% (Limit to avoid major modification under NSR)

Monitoring: daily visible emissions checks performed by a trained inspector; Recordkeeping: keep records of visible emissions checks, and any corrective actions.

Northshore has standard operating procedures for the control and response of any uncaptured particulate matter (PM, PM10 and PM2.5) emissions in the pellet yard. The new units are included in Northshore’s Fugitive Dust Control Plan. This area of the facility is staffed 24 hours a day which allows for continual observation for any particulate matter emissions and corrective actions are taken quickly. By continuing to operate in this matter, the Permittee is likely to meet this limit. By recording the visible emissions checks and any corrective actions, the Permittee is able to demonstrate that compliance with this limit is achieved.

Opacity ≤ 20% (Minn. R. 7011.0110)

Monitoring: daily visible emissions checks performed by a trained inspector; Recordkeeping: keep records of visible emissions checks, and any corrective actions.

The monitoring for compliance with the 1.5% moisture content requirement is sufficient for demonstrating compliance with the opacity limit.

*Location of the requirement in the permit (e.g., EU, SV, GP, etc.).

Additionally, the Permittee provided the information in Figure 1 in support of the pellet moisture content used in the emissions increase calculations. Northshore regularly measures the moisture content of the taconite pellets before they are shipped. This measurement is made after the pellets have passed through the pellet yard. A moisture content of 2.5% is used in the calculations based on historical moisture content data.


Figure 1: Moisture Content of Taconite Pellets ‐ Ore Boat Loading

3.4 Performance Testing – Taconite MACT The performance testing schedules for units subject to the Taconite MACT were updated. All initial compliance testing has been completed. Subsequent testing for all units has begun. The Taconite MACT requires all units except for furnaces to complete one performance test every 5 calendar years. Furnaces are required to be tested twice every 5 calendar years. The following table lays out the performance test schedule for units subject to the Taconite MACT.

Table 7: Taconite MACT Performance Testing Schedule Group Current Testing Period Date Test

Completed Next Testing Period

GP003 2011‐2015 (start date in permit: 12/31/2010)

3/31/2011 2016‐2020


3/31/2011 2016‐2020

GP005 2012‐2016 (start date in Permit: 12/31/2011)

10/17/2012 2017‐2021


7/27/2010 2015‐2019


4/29/2014 2019‐2023


4/29/2014 2019‐2023


4/11/2012 2017‐2021


3/29/2011 2016‐2020

GP014 – EU100 and EU104 2013‐2017 (start date in permit: 5/14/2013 2018‐2022


12/31/2012)

2 tests required per 5 year term

GP014 – EU110 and EU114 2014‐2018 (start date in permit: 12/31/2013)


7/22/2014 2019‐2023

GP014 – EU262 2011‐2015 (start date in permit: 12/31/2010)


12/28/2011 2016‐2020

GP014 – EU634 2014‐2018 (start date in permit: 12/31/2013)


9/25/2014 2019‐2023


5/22/2012 2017‐2021

GP016 – EU097 2014‐2018 (start date in permit: 12/31/2013

8/11/2014 2019‐2023

GP016 – EU122, EU123, EU124, and EU125

2014‐2018 (start date in permit: 12/31/2013)

9/23/2014 2019‐2023

3.5 Insignificant Activities Northshore Mining ‐ Silver Bay has several operations which are classified as insignificant activities under the MPCA’s permitting rules. These are listed in Appendix F to the permit. No additional insignificant activities are included in this modification. 3.6 Permit Organization In general, the permit meets the MPCA Delta Guidance for ordering and grouping of requirements. One area where this permit deviates slightly from Delta guidance is in the use of appendices. While appendices are fully enforceable parts of the permit, in general, any requirement that the MPCA thinks should be electronically tracked (e.g., limits, submittals, etc.), should be in Table A or B of the permit. The main reason is that the appendices are word processing sections and are not part of the electronic tracking system. Violation of the appendices can be enforced, but the computer system will not automatically generate the necessary enforcement notices or documents. Staff must generate these. 3.7 Comments Received This section will be completed after the referenced review period. No public comment period is required under Minn. R. 7007.0850 EPA 45‐day Review Period: December 18, 2014 – February 2, 2015 Comments were not received from EPA during their review period. 4. Permit Fee Assessment Attachment 3 to this TSD contains the MPCA’s assessment of Application and Additional Points used to determine the permit application fee for this permit action as required by Minn. R. 7002.0019. The


permit action includes a moderate amendment and the incorporation of NSPS requirements, to which additional fees apply. 5. Conclusion Based on the information provided by Cliffs Natural Resources for their Northshore Mining ‐ Silver Bay facility, the MPCA has reasonable assurance that the operation of the emission facility, as described in the Air Emission Permit No. 07500003‐010 and this TSD, will not cause or contribute to a violation of applicable federal regulations and Minnesota Rules. Staff Members on Permit Team: Cindy Schafer (permit engineer)

Steven Palzkill (enforcement) Marc Severin (compliance) Dick Cordes (peer reviewer) Beckie Olson (permit writing assistant) Sandy Simbeck (administrative support)

AQ File No. 27A; DQ 4889 Attachments: 1. Emissions Increase Calculation Spreadsheets

2. Facility Description and CD‐01 Forms 3. Points Calculator

ATTACHMENT 1TECHNICAL SUPPORT DOCUMENT FOR PERMIT NO. 07500003 010

Emissions Increase Calculation Spreadsheets

Northshore Mining Company

CH-04a Determination of Increases at Major SourcesCompleted tables per the form are presented belowTable 1 Pollutant -> PM PM10 PM2.5

EU/TK/FS

Modified/Replacement/Debottlenecked

Baseline period start and end dates (mm/dd/yyyy)

ProjectedActualEmissions*(tpy)

BaselineActualEmissions(tpy)

Exclusionfrom Projected Actuals** (tpy)

Increase(tpy)



ExclusionfromProjectedActuals** (tpy)

Increase(tpy)



ExclusionfromProjectedActuals**(tpy)

Increase(tpy)

EU 007 None 11/01/2010 to 10/31/2012 0.40 0.39 0.00 0.00 0.40 0.39 0.00 0.00 0.11 0.10 0.00 0.00EU 008 None 11/01/2010 to 10/31/2012 2.90 2.84 0.03 0.02 3.69 3.62 0.04 0.03 0.78 0.76 0.01 0.01EU 009 None 11/01/2010 to 10/31/2012 0.70 0.68 0.03 0.00 1.40 1.37 0.07 0.00 0.19 0.18 0.01 0.00EU 010 None 11/01/2010 to 10/31/2012 0.76 0.75 0.01 0.01 0.76 0.75 0.01 0.01 0.20 0.20 0.00 0.00EU 012 None 11/01/2010 to 10/31/2012 0.00 0.00 0.00 0.00 0.15 0.15 0.01 0.00 0.00 0.00 0.00 0.00EU 013 None 11/01/2010 to 10/31/2012 0.15 0.15 0.01 0.00 0.30 0.29 0.02 0.00 0.04 0.04 0.00 0.00EU 014 None 11/01/2010 to 10/31/2012 0.22 0.22 0.00 0.00 0.62 0.61 0.00 0.01 0.06 0.06 0.00 0.00EU 015 None 11/01/2010 to 10/31/2012 0.20 0.20 0.01 0.00 0.55 0.54 0.03 0.00 0.05 0.05 0.00 0.00EU 016 None 11/01/2010 to 10/31/2012 0.18 0.18 0.00 0.00 0.76 0.75 0.01 0.01 0.05 0.05 0.00 0.00EU 017 None 11/01/2010 to 10/31/2012 0.09 0.08 0.00 0.00 0.09 0.08 0.00 0.00 0.02 0.02 0.00 0.00EU 018 None 11/01/2010 to 10/31/2012 0.09 0.09 0.00 0.00 0.09 0.09 0.00 0.00 0.02 0.02 0.00 0.00EU 019 None 11/01/2010 to 10/31/2012 0.05 0.05 0.00 0.00 0.21 0.20 0.00 0.00 0.01 0.01 0.00 0.00EU 021 None 11/01/2010 to 10/31/2012 2.03 1.99 0.02 0.02 2.95 2.90 0.03 0.02 0.54 0.53 0.01 0.00EU 022 None 11/01/2010 to 10/31/2012 0.21 0.21 0.00 0.00 0.58 0.57 0.01 0.00 0.06 0.06 0.00 0.00EU 023 None 11/01/2010 to 10/31/2012 0.21 0.21 0.00 0.00 0.58 0.57 0.01 0.00 0.06 0.06 0.00 0.00EU 024 None 11/01/2010 to 10/31/2012 0.21 0.21 0.00 0.00 0.58 0.57 0.01 0.00 0.06 0.06 0.00 0.00EU 025 None 11/01/2010 to 10/31/2012 2.03 1.99 0.02 0.02 2.95 2.90 0.03 0.02 0.54 0.53 0.01 0.00EU 026 None 11/01/2010 to 10/31/2012 0.25 0.24 0.03 0.00 0.36 0.35 0.04 0.00 0.07 0.07 0.01 0.00EU 027 None 11/01/2010 to 10/31/2012 0.25 0.24 0.03 0.00 0.36 0.35 0.04 0.00 0.07 0.07 0.01 0.00EU 028 None 11/01/2010 to 10/31/2012 0.03 0.03 0.00 0.00 0.11 0.11 0.01 0.00 0.01 0.01 0.00 0.00EU 029 None 11/01/2010 to 10/31/2012 0.04 0.03 0.00 0.00 0.11 0.11 0.01 0.00 0.01 0.01 0.00 0.00EU 030 None 11/01/2010 to 10/31/2012 0.11 0.10 0.00 0.00 0.21 0.21 0.00 0.00 0.03 0.03 0.00 0.00EU 031 None 11/01/2010 to 10/31/2012 0.10 0.10 0.00 0.00 0.25 0.24 0.00 0.00 0.03 0.03 0.00 0.00EU 036 None 11/01/2010 to 10/31/2012 0.02 0.02 0.10 0.00 0.08 0.08 0.46 0.00 0.00 0.00 0.03 0.00EU 037 None 11/01/2010 to 10/31/2012 0.10 0.10 0.03 0.00 0.47 0.46 0.15 0.00 0.03 0.03 0.01 0.00EU 038 None 11/01/2010 to 10/31/2012 0.11 0.11 0.02 0.00 0.52 0.51 0.11 0.00 0.03 0.03 0.01 0.00EU 039 None 11/01/2010 to 10/31/2012 0.12 0.12 0.01 0.00 0.57 0.56 0.07 0.00 0.03 0.03 0.00 0.00EU 040 None 11/01/2010 to 10/31/2012 0.11 0.11 0.03 0.00 0.50 0.49 0.13 0.00 0.03 0.03 0.01 0.00EU 041 None 11/01/2010 to 10/31/2012 0.12 0.12 0.01 0.00 0.55 0.54 0.07 0.00 0.03 0.03 0.00 0.00EU 042 None 11/01/2010 to 10/31/2012 0.10 0.10 0.03 0.00 0.48 0.47 0.15 0.00 0.03 0.03 0.01 0.00EU 044 None 11/01/2010 to 10/31/2012 0.11 0.11 0.03 0.00 0.49 0.48 0.14 0.00 0.03 0.03 0.01 0.00EU 045 None 11/01/2010 to 10/31/2012 0.54 0.53 0.08 0.00 0.54 0.53 0.08 0.00 0.15 0.14 0.02 0.00EU 046 None 11/01/2010 to 10/31/2012 0.12 0.11 0.02 0.00 0.53 0.52 0.10 0.00 0.03 0.03 0.01 0.00EU 047 None 11/01/2010 to 10/31/2012 0.11 0.11 0.03 0.00 0.52 0.51 0.12 0.00 0.03 0.03 0.01 0.00EU 048 None 11/01/2010 to 10/31/2012 0.25 0.25 0.05 0.00 0.53 0.52 0.10 0.00 0.07 0.07 0.01 0.00EU 049 None 11/01/2010 to 10/31/2012 0.26 0.26 0.04 0.00 0.55 0.54 0.07 0.00 0.07 0.07 0.01 0.00EU 050 None 11/01/2010 to 10/31/2012 0.26 0.26 0.04 0.00 0.55 0.54 0.08 0.00 0.07 0.07 0.01 0.00EU 051 None 11/01/2010 to 10/31/2012 0.27 0.26 0.04 0.00 0.56 0.55 0.08 0.00 0.07 0.07 0.01 0.00EU 052 None 11/01/2010 to 10/31/2012 0.31 0.30 0.04 0.00 0.55 0.54 0.08 0.00 0.08 0.08 0.01 0.00EU 053 None 11/01/2010 to 10/31/2012 0.25 0.25 0.05 0.00 0.54 0.53 0.11 0.00 0.07 0.07 0.01 0.00EU 097 None 11/01/2010 to 10/31/2012 0.61 0.61 0.03 0.00 2.21 2.21 0.11 0.00 0.50 0.50 0.02 0.00EU 100 None 11/01/2010 to 10/31/2012 30.82 30.82 1.51 0.00 98.18 98.18 4.82 0.00 25.12 25.12 1.23 0.00EU 104 None 11/01/2010 to 10/31/2012 25.12 25.12 1.23 0.00 59.37 59.37 2.91 0.00 20.47 20.47 1.00 0.00EU 110 None 11/01/2010 to 10/31/2012 14.79 14.79 0.42 0.00 77.04 77.04 2.19 0.00 12.05 12.05 0.34 0.00EU 114 None 11/01/2010 to 10/31/2012 4.67 4.67 0.13 0.00 27.24 27.24 0.78 0.00 3.81 3.81 0.11 0.00EU 120 None 11/01/2010 to 10/31/2012 5.33 5.33 0.26 0.00 7.61 7.61 0.37 0.00 4.34 4.34 0.21 0.00EU 121 None 11/01/2010 to 10/31/2012 1.95 1.95 0.06 0.00 2.72 2.72 0.08 0.00 1.59 1.59 0.05 0.00EU 122 None 11/01/2010 to 10/31/2012 2.66 2.66 0.13 0.00 3.65 3.65 0.18 0.00 2.17 2.17 0.11 0.00EU 123 None 11/01/2010 to 10/31/2012 2.66 2.66 0.13 0.00 3.65 3.65 0.18 0.00 2.17 2.17 0.11 0.00EU 124 None 11/01/2010 to 10/31/2012 2.72 2.72 0.08 0.00 3.74 3.74 0.11 0.00 2.22 2.22 0.06 0.00EU 125 None 11/01/2010 to 10/31/2012 2.72 2.72 0.08 0.00 3.74 3.74 0.11 0.00 2.22 2.22 0.06 0.00EU 262 None 11/01/2010 to 10/31/2012 7.15 6.82 0.70 0.00 30.47 29.08 2.98 0.00 2.68 2.56 0.26 0.00EU 265 None 11/01/2010 to 10/31/2012 5.27 5.03 0.51 0.00 7.52 7.18 0.74 0.00 1.97 1.89 0.19 0.00EU 634 None 11/01/2010 to 10/31/2012 15.84 15.12 1.57 0.00 64.48 61.55 6.41 0.00 5.94 5.67 0.59 0.00EU 635 None 11/01/2010 to 10/31/2012 1.36 1.30 0.13 0.00 2.00 1.91 0.20 0.00 0.51 0.49 0.05 0.00EU 636 None 11/01/2010 to 10/31/2012 0.00 7.87 1.25 0.00 0.00 6.69 1.07 0.00 0.00 1.16 0.18 0.00FS 010a None 11/01/2010 to 10/31/2012 1.41 2.14 0.22 0.00 0.65 0.99 0.10 0.00 0.21 0.31 0.03 0.00FS 011a None 11/01/2010 to 10/31/2012 0.42 0.64 0.07 0.00 0.20 0.30 0.03 0.00 0.06 0.09 0.01 0.00FS 011b None 11/01/2010 to 10/31/2012 1.41 2.14 0.22 0.00 0.65 0.99 0.10 0.00 0.21 0.31 0.03 0.00FS 012a None 11/01/2010 to 10/31/2012 0.11 0.11 0.00 0.00 0.06 0.06 0.00 0.00 0.02 0.02 0.00 0.00FS 013a None 11/01/2010 to 10/31/2012 0.71 1.07 0.11 0.00 0.33 0.49 0.05 0.00 0.10 0.16 0.02 0.00FS 013b None 11/01/2010 to 10/31/2012 0.71 1.07 0.11 0.00 0.33 0.49 0.05 0.00 0.10 0.16 0.02 0.00FS 013c None 11/01/2010 to 10/31/2012 0.71 1.07 0.11 0.00 0.33 0.49 0.05 0.00 0.10 0.16 0.02 0.00FS 013d None 11/01/2010 to 10/31/2012 0.53 0.53 0.35 0.00 0.24 0.25 0.16 0.00 0.08 0.08 0.05 0.00FS 013e None 11/01/2010 to 10/31/2012 1.06 1.07 0.70 0.00 0.49 0.49 0.32 0.00 0.16 0.16 0.10 0.00EU 637 None 11/01/2010 to 10/31/2012EU 638 None 11/01/2010 to 10/31/2012EU 639 None 11/01/2010 to 10/31/2012FS 013f None 11/01/2010 to 10/31/2012FS 014 None 11/01/2010 to 10/31/2012 2.20 2.24 0.23 0.00 4.05 4.14 0.43 0.00 0.32 0.33 0.03 0.00FS 015 None 11/01/2010 to 10/31/2012 2.00 2.00 0.00 0.00 1.00 1.00 0.00 0.00 0.29 0.29 0.00 0.00FS 016a None 11/01/2010 to 10/31/2012 5.30 5.61 3.24 0.00 2.45 2.59 1.50 0.00 0.78 0.82 0.48 0.00FS 016b None 11/01/2010 to 10/31/2012 5.30 5.61 3.24 0.00 2.45 2.59 1.50 0.00 0.78 0.82 0.48 0.00FS 016c None 11/01/2010 to 10/31/2012 5.30 5.61 3.24 0.00 2.45 2.59 1.50 0.00 0.78 0.82 0.48 0.00FS 016d None 11/01/2010 to 10/31/2012 5.30 5.61 3.24 0.00 2.45 2.59 1.50 0.00 0.78 0.82 0.48 0.00FS 016e None 11/01/2010 to 10/31/2012 1.06 1.12 0.65 0.00 0.49 0.52 0.30 0.00 0.16 0.16 0.10 0.00FS 016f None 11/01/2010 to 10/31/2012 1.06 1.12 0.65 0.00 0.49 0.52 0.30 0.00 0.16 0.16 0.10 0.00FS 016g None 11/01/2010 to 10/31/2012 1.41 2.24 0.23 0.00 0.65 1.04 0.11 0.00 0.21 0.33 0.03 0.00FS 016h None 11/01/2010 to 10/31/2012EU 640 None 11/01/2010 to 10/31/2012FS 016k None 11/01/2010 to 10/31/2012 0.51 0.00 0.00 0.51 0.23 0.00 0.00 0.23 0.07 0.00 0.00 0.07FS 016l None 11/01/2010 to 10/31/2012 0.68 0.00 0.00 0.68 0.31 0.00 0.00 0.31 0.10 0.00 0.00 0.10FS 017 None 11/01/2010 to 10/31/2012 7.14 5.11 2.95 0.00 7.14 5.11 2.95 0.00 1.05 0.75 0.43 0.00

Table 1 (cont..) Pollutant -> SO2 NOx CO2e

EU/TK/FS

Modified/Replacement/Debottlenecked

Baseline period start and end dates (mm/dd/yyyy)



Exclusionfrom Projected Actuals** (tpy)

Increase(tpy)



ExclusionfromProjectedActuals** (tpy)

Increase(tpy)



ExclusionfromProjectedActuals**(tpy)

Increase(tpy)

EU 100 None 11/01/2010 to 10/31/2012 7.23 7.23 0.35 0.00 45.67 45.67 2.24 0.00 56,131 61,108 4,451 0EU 104 None 11/01/2010 to 10/31/2012 7.23 7.23 0.35 0.00 281.61 281.61 13.82 0.00 0 0 0 0EU 110 None 11/01/2010 to 10/31/2012 7.39 7.39 0.21 0.00 46.69 46.69 1.33 0.00 56,131 59,802 5,533 0EU 114 None 11/01/2010 to 10/31/2012 7.39 7.39 0.21 0.00 287.92 287.92 8.20 0.00 0 0 0 0EU 262 None 11/01/2010 to 10/31/2012 1.58 1.51 0.15 0.00 106.07 101.25 10.37 0.00 33,455 29,971 5,816 0EU 265 None 11/01/2010 to 10/31/2012 1.58 1.51 0.16 0.00 106.33 101.50 10.57 0.00 33,455 30,721 3,857 0

*Title/date of document(s) used as basis for projected actuals: Northshore Mining DR-Grade Pellet Feasibility Study/July 1, 2013**Description of emissions excluded from the projected actuals: Based on demonstrated maximum production rates accounting for normal equipment availability.

Northshore Mining Company

CH-04a Determination of Increases at Major SourcesCompleted tables per the form are presented belowTable 2 - Summary of Table 1 ResultsPollutant-> PM PM10 PM2.5 SO2 NOx CO2e

EU/TK/FSIncrease(tpy)

Increase(tpy)

Increase(tpy)

Increase(tpy)

Increase(tpy)

Increase(tpy)

EU 007 0.00 0.00 0.00EU 008 0.02 0.03 0.01EU 009 0.00 0.00 0.00EU 010 0.01 0.01 0.00EU 012 0.00 0.00 0.00EU 013 0.00 0.00 0.00EU 014 0.00 0.01 0.00EU 015 0.00 0.00 0.00EU 016 0.00 0.01 0.00EU 017 0.00 0.00 0.00EU 018 0.00 0.00 0.00EU 019 0.00 0.00 0.00EU 021 0.02 0.02 0.00EU 022 0.00 0.00 0.00EU 023 0.00 0.00 0.00EU 024 0.00 0.00 0.00EU 025 0.02 0.02 0.00EU 026 0.00 0.00 0.00EU 027 0.00 0.00 0.00EU 028 0.00 0.00 0.00EU 029 0.00 0.00 0.00EU 030 0.00 0.00 0.00EU 031 0.00 0.00 0.00EU 036 0.00 0.00 0.00EU 037 0.00 0.00 0.00EU 038 0.00 0.00 0.00EU 039 0.00 0.00 0.00EU 040 0.00 0.00 0.00EU 041 0.00 0.00 0.00EU 042 0.00 0.00 0.00EU 044 0.00 0.00 0.00EU 045 0.00 0.00 0.00EU 046 0.00 0.00 0.00EU 047 0.00 0.00 0.00EU 048 0.00 0.00 0.00EU 049 0.00 0.00 0.00EU 050 0.00 0.00 0.00EU 051 0.00 0.00 0.00EU 052 0.00 0.00 0.00EU 053 0.00 0.00 0.00EU 097 0.00 0.00 0.00EU 100 0.00 0.00 0.00 0.00 0.00 0.00EU 104 0.00 0.00 0.00 0.00 0.00 0.00EU 110 0.00 0.00 0.00 0.00 0.00 0.00EU 114 0.00 0.00 0.00 0.00 0.00 0.00EU 120 0.00 0.00 0.00EU 121 0.00 0.00 0.00EU 122 0.00 0.00 0.00EU 123 0.00 0.00 0.00EU 124 0.00 0.00 0.00EU 125 0.00 0.00 0.00EU 262 0.00 0.00 0.00 0.00 0.00 0.00EU 265 0.00 0.00 0.00 0.00 0.00 0.00EU 634 0.00 0.00 0.00EU 635 0.00 0.00 0.00EU 636 0.00 0.00 0.00FS 010a 0.00 0.00 0.00FS 011a 0.00 0.00 0.00FS 011b 0.00 0.00 0.00FS 012a 0.00 0.00 0.00FS 013a 0.00 0.00 0.00FS 013b 0.00 0.00 0.00FS 013c 0.00 0.00 0.00FS 013d 0.00 0.00 0.00FS 013e 0.00 0.00 0.00EU 637EU 638EU 639FS 013fFS 014 0.00 0.00 0.00FS 015 0.00 0.00 0.00FS 016a 0.00 0.00 0.00FS 016b 0.00 0.00 0.00FS 016c 0.00 0.00 0.00FS 016d 0.00 0.00 0.00FS 016e 0.00 0.00 0.00FS 016f 0.00 0.00 0.00FS 016g 0.00 0.00 0.00FS 016hEU 640FS 016k 0.51 0.23 0.07FS 016l 0.68 0.31 0.10FS 017 0.00 0.00 0.00

Total 1.27 0.68 0.20 0.00 0.00 0.00

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PT

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PT

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PT

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EU

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EU

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6.65

0.98

Northshore Mining

Northshore Mining Baseline Period: Nov-2010 to Oct-2012

Actual To Projected Actual - Low-Silica Pellet Production Project

EU EU Description PM PM10 PM2.5 SO2 NOx CO2e PM PM10 PM2.5 SO2 NOx CO2eton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr

EU 007 Car Dump E 0.40 0.40 0.11 0.39 0.39 0.10EU 008 Car Dump W 2.90 3.69 0.78 2.84 3.62 0.76EU 009 FC Bins W 0.70 1.40 0.19 0.68 1.37 0.18EU 010 FC Bins E 0.76 0.76 0.20 0.75 0.75 0.20EU 012 Crusher Line 3 0.00 0.15 0.00 0.00 0.15 0.00EU 013 Crusher Line 2 0.15 0.30 0.04 0.15 0.29 0.04EU 014 Crusher Line 1 0.22 0.62 0.06 0.22 0.61 0.06EU 015 FC Conveyors W 0.20 0.55 0.05 0.20 0.54 0.05EU 016 FC Conveyors E 0.18 0.76 0.05 0.18 0.75 0.05EU 017 Crusher Line 101 0.09 0.09 0.02 0.08 0.08 0.02EU 018 Crusher Line 102 0.09 0.09 0.02 0.09 0.09 0.02EU 019 Crusher Line 103 0.05 0.21 0.01 0.05 0.20 0.01EU 021 Dry Cob 2.03 2.95 0.54 1.99 2.90 0.53EU 022 Dry Cob 0.21 0.58 0.06 0.21 0.57 0.06EU 023 Dry Cob 0.21 0.58 0.06 0.21 0.57 0.06EU 024 Dry Cob 0.21 0.58 0.06 0.21 0.57 0.06EU 025 Dry Cob 2.03 2.95 0.54 1.99 2.90 0.53EU 026 Tails Belts 0.25 0.36 0.07 0.24 0.35 0.07EU 027 Tails Belts 0.25 0.36 0.07 0.24 0.35 0.07EU 028 Tails Belts 0.03 0.11 0.01 0.03 0.11 0.01EU 029 Tails Belts 0.04 0.11 0.01 0.03 0.11 0.01EU 030 Conc Transfer Bin W 0.11 0.21 0.03 0.10 0.21 0.03EU 031 Conc Transfer Bin E 0.10 0.25 0.03 0.10 0.24 0.03EU 036 Concentrator Section 5 0.02 0.08 0.00 0.02 0.08 0.00EU 037 Concentrator Section 6 0.10 0.47 0.03 0.10 0.46 0.03EU 038 Concentrator Section 7 0.11 0.52 0.03 0.11 0.51 0.03EU 039 Concentrator Section 8 0.12 0.57 0.03 0.12 0.56 0.03EU 040 Concentrator Section 9 0.11 0.50 0.03 0.11 0.49 0.03EU 041 Concentrator Section 10 0.12 0.55 0.03 0.12 0.54 0.03EU 042 Concentrator Section 11 0.10 0.48 0.03 0.10 0.47 0.03EU 044 Concentrator Section 101 0.11 0.49 0.03 0.11 0.48 0.03EU 045 Concentrator Section 102 0.54 0.54 0.15 0.53 0.53 0.14EU 046 Concentrator Section 103 0.12 0.53 0.03 0.11 0.52 0.03EU 047 Concentrator Section 104 0.11 0.52 0.03 0.11 0.51 0.03EU 048 Concentrator Section 105 0.25 0.53 0.07 0.25 0.52 0.07EU 049 Concentrator Section 106 0.26 0.55 0.07 0.26 0.54 0.07EU 050 Concentrator Section 107 0.26 0.55 0.07 0.26 0.54 0.07EU 051 Concentrator Section 108 0.27 0.56 0.07 0.26 0.55 0.07EU 052 Concentrator Section 109 0.31 0.55 0.08 0.30 0.54 0.08EU 053 Concentrator Section 110 0.25 0.54 0.07 0.25 0.53 0.07EU 097 Hearth Layer 0.61 2.21 0.50 0.61 2.21 0.50EU 100 Fce 11 - Hood Exhaust 30.82 98.18 25.12 7.23 45.67 56,131 30.82 98.18 25.12 7.23 45.67 61,108EU 104 Fce 11 - Waste Gas 25.12 59.37 20.47 7.23 281.61 25.12 59.37 20.47 7.23 281.61EU 110 Fce 12 - Hood Exhaust 14.79 77.04 12.05 7.39 46.69 56,131 14.79 77.04 12.05 7.39 46.69 59,802EU 114 Fce 12 - Waste Gas 4.67 27.24 3.81 7.39 287.92 4.67 27.24 3.81 7.39 287.92EU 120 Fce 11 Discharge 5.33 7.61 4.34 5.33 7.61 4.34EU 121 Fce 12 Discharge 1.95 2.72 1.59 1.95 2.72 1.59EU 122 Fce 11 Screening 2.66 3.65 2.17 2.66 3.65 2.17EU 123 Screenhouse - North 2.66 3.65 2.17 2.66 3.65 2.17EU 124 Fce 12 Screening 2.72 3.74 2.22 2.72 3.74 2.22EU 125 Screenhouse - South 2.72 3.74 2.22 2.72 3.74 2.22EU 262 Furnace 6 Hood Exhaust/Waste Gas 7.15 30.47 2.68 1.58 106.07 33,455 6.82 29.08 2.56 1.51 101.25 29,971EU 265 Furnace 6 Discharge 5.27 7.52 1.97 1.58 106.33 33,455 5.03 7.18 1.89 1.51 101.50 30,721EU 634 Furnace 5 Hood Exhaust/Waste Gas 15.84 64.48 5.94 15.12 61.55 5.67EU 635 Furnace 5 Discharge 1.36 2.00 0.51 1.30 1.91 0.49EU 636 60A to 60B Transfer and 5x12 Screen 0.00 0.00 0.00 7.87 6.69 1.16FS 010a Conveyor 60A to 40 1.41 0.65 0.21 2.14 0.99 0.31FS 011a Cconveyor 40 to cooling pile 0.42 0.20 0.06 0.64 0.30 0.09FS 011b Conveyor 41 to 42 1.41 0.65 0.21 2.14 0.99 0.31FS 012a Wind erosion from cooling pile 0.11 0.06 0.02 0.11 0.06 0.02FS 013a 160 to 161 0.71 0.33 0.10 1.07 0.49 0.16FS 013b 161 to 62/162 0.71 0.33 0.10 1.07 0.49 0.16FS 013c 62/162 to 63/163 0.71 0.33 0.10 1.07 0.49 0.16FS 013d 63/163 to Bridge 0.53 0.24 0.08 0.53 0.25 0.08FS 013e Bridge to stockpile 1.06 0.49 0.16 1.07 0.49 0.16EU 637 60B to 61EU 638 61 to IEU 639 I to JFS 013f J to stockpileFS 014 Pellet Handling - Boatloading 2.20 4.05 0.32 2.24 4.14 0.33FS 015 Pellet Handling - Wind Erosion from Pile 2.00 1.00 0.29 2.00 1.00 0.29FS 016a FEL Reclaim 5.30 2.45 0.78 5.61 2.59 0.82FS 016b FEL Reclaim to Conveyor 5.30 2.45 0.78 5.61 2.59 0.82FS 016c Conveyor to Conveyor 5.30 2.45 0.78 5.61 2.59 0.82FS 016d Conveyor to 67 5.30 2.45 0.78 5.61 2.59 0.82FS 016e 67 to 62/162 1.06 0.49 0.16 1.12 0.52 0.16FS 016f 62/162 to 63/163 1.06 0.49 0.16 1.12 0.52 0.16FS 016g 63/163 to bins 1.41 0.65 0.21 2.24 1.04 0.33FS 016h FEL Reclaim to ConveyorEU 640 Conveyor to 62/162FS 016k 62/162 to 63/163 0.51 0.23 0.07 0.00 0.00 0.00FS 016l 63/163 to bins 0.68 0.31 0.10 0.00 0.00 0.00FS 017 Pellet Screening - Yard 7.14 7.14 1.05 5.11 5.11 0.75Project Total 182.38 447.59 98.13 32.41 179,172 190.40 448.82 98.97 32.27 181,602

Projected Actual Emissions (TPY) Baseline Actual Emissions (TPY)

4

Northshore Mining

Major NSR Applicability Analysis and Pre-Project RecordCompany: Northshore MiningFacility: Silver Bay, MNPermit No. 07500003-007Project Low Silica Pellet Handling System ProjectDate: 6/8/2014

1. Pre-Project Record [40 CFR § 52.21(r)(6)(i)]

(a) Description of the project

(b) Identification of the emission units whose emissions of regulated NSR pollutant could be affected by the project

New Emission Units that will be affected by the project are presented below.Emission Unit EU60B to 61 Conveyor Transfer EU 63761 to I Conveyor Transfer EU 638I to J Conveyor Transfer EU 639J to stockpile Conveyor Transfer FS 013fFEL Reclaim to Conveyor FS 016hConveyor to 62/162 EU 640

Existing Emission Units that will be affected by the project are in the tables for BAE and PAE.

(c) Applicability Test: Hybrid Test - Actual-to-Projected-Actual Emissions (ATPA) for existing units and Potential to Emit (PTE) for new units

Baseline Actual Emissions (BAE) [40 CFR § 52.21(b)(48)]BAE Time Period: Nov-2010 to Oct-2012

BF Pellets 5,479,320 ton/yrDR Pellets 0 ton/yrTotal 5,479,320 ton/yr

Baseline Actual Emissions (tons/year)

Emission Unit PM PM10 PM2.5 SO2 NOx

GHGs(CO2e)

Existing Emissions Units 190.40 448.82 98.97 32.3 864.63 181,602 See details in "BAE Northshore"TOTAL 190.40 448.82 98.97 32 864.63 181,602

Northshore Mining is proposing a project to produce low silica product. Northshore plans to make upgrades to the concentrator sections to achieve 2% silica in concentrate for this new product. Iron / weight recovery will be improved under the scheme of operating the plant with two products simultaneously and operating a scavenger recovery system. In the pellet yard and dock area three new enclosed conveyors, a new non-enclosed stacker conveyor, and a new enclosed pellet reclaim hopper will be added. The new equipment is intended to accommodate a future 2-product scenario in the pellet yard pending new contracts for a new product specification. There will be no changes to the other existing equipment at the site including the existing indurating furnaces.

Production Rate

5

Northshore Mining

Projected Actual Emissions (PAE) [40 CFR § 52.21(b)(41)] and Potential To Emit (PTE) [40 CFR § 52.21(b)(4)]

Units resume regular operation upon completion Dec-2014Projection Time Period: Jan-2015 to Dec-2019

BF Pellets 1,734,480 ton/yrDR Pellets 3,626,640 ton/yrTotal 5,361,120 ton/yr

Projected Actual Emissions (tons/year)


GHGs(CO2e)

Existing Emissions Units 183.16 451.02 99.22 32.4 874.29 179,172 See details in "PAE Northshore"

Potential to Emit (tons/year)

Emission Unit PM PM10 PM2.5

60B to 61 Conveyor Transfer 0.08 0.04 0.00 61 to I Conveyor Transfer 0.08 0.04 0.00 I to J Conveyor Transfer 0.08 0.04 0.00 J to stockpile Conveyor Transfer 7.65 3.25 0.49 FEL Reclaim to Conveyor 7.65 3.25 0.49 Conveyor to 62/162 0.08 0.04 0.00 Total 15.63 6.65 0.98 See details in "New Unit PTE Calcs"

Excludable Emissions (EE) [40 CFR § 52.21(b)(41)(ii)(c)]

Excludable Emissions (tons/year)


GHGs(CO2e)

Existing Emissions Units 28.22 36.64 7.71 32.4 874.29 19,657 See details in "CHAE Northshore"

Explanation of excludable emissions:In accordance with the definition of Project Emissions Increase (PEI), Northshore excluded emissions in calculating increases occurring from the project for certain units. Northshore determined the pellet production rates that the facilities could have accommodated in the baseline period using historical production records. These "could have accommodated" (CHA) production rates were determined by annualizing peak historical monthly production rates as representative of demonstrated maximum production accounting for normal equipment availability that the units could have accommodated in the baseline period given sufficient product demand and production/emissions that are unrelated to the project. For the existing units no changes to the emission factors are expected from the project; therefore, the entire projected emission increase was excluded as emissions that the facility could have accommodated and that are unrelated to the project. For the affected units, only that portion of the calculated increase (PAE - BAE) representing the delta between baseline actual production and CHA production was excluded.

Production Rate

Basis for Projection: Northshore Mining DR-Grade Pellet Feasibility Study/July 1, 2013

The throughputs shown above represent the worst-case operating scenario for producing two products. In case of lower demand for DR pellets, Northshore will continue to produce BF pellets up to its maximum historical demonstrated capacity. Production of BF pellets will not result in any increases in emissions at the existing units. The PTE for new units (which is less than significant for all pollutants) that may handle BF pellet shown below represents the maximum increase for this scenario.

This table only presents the sum of excludable emissions from the sheet "CHAE Northshore." However, for the applicability test, emissions are excluded on a unit-by-unit basis in accordance with 40 CFR § 52.21(b)(41)(ii)(c) and 40 CFR § 52.21(a)(2)(iv)(c). Details of excludable emissions and projected emissions increases for each of the existing emissions unit affected by the project are provided in "ATPA Northshore."

6

Northshore Mining

Projected Emissions Increase (PEI) = PAE - BAE - EE [40 CFR § 52.21(a)(2)(iv)(c)]

Projected Emissions Increase (PEI) (tons/year)


GHGs(CO2e*)

Existing Emissions Units 1.27 0.68 0.20 0.00 0.00 0.00 See details in "ATPA Northshore" sheet

Potential to Emit (tons/year)Emission Unit PM PM10 PM2.5

60B to 61 Conveyor Transfer 0.08 0.04 0.00 61 to I Conveyor Transfer 0.08 0.04 0.00 I to J Conveyor Transfer 0.08 0.04 0.00 J to stockpile Conveyor Transfer 7.65 3.25 0.49 FEL Reclaim to Conveyor 7.65 3.25 0.49 Conveyor to 62/162 0.08 0.04 0.00 See details in "New Unit PTE Calcs"TOTAL 16.90 7.33 1.18 0.00 0.00 0 PSD Significant Rate* 25 15 10 100 40 75,000

Significant Increase? No No No No No No*For CO2e, significant emission rate represents the threshold for determining whether GHGs are "subject to regulation."

2. Reasonable Possibility [40 CFR § 52.21(r)(6)(vi)]

Projected Emissions Increase (PEI) (tons/year)


GHGs(CO2e)

Whether PEI>50% of SER - RP1 Yes No No No No NoWhether PEI+EE>50% of SER - RP2 Yes Yes No No Yes NoSince the project does trigger RP1 for PM, monitoring, recordkeeping, and reporting is applicable to the project affected units.Since the project does trigger RP2, requirement to maintain this calculation records is applicable to the project.

Conclusion:Based on the above analysis, the proposed changes for the Low Silica Pellet Handling System Project will be a non-major modification for PSD requirements.Northshore will monitor and record amount of production throughput and emissions from the affected units on monthly basis for a five year period afterthe completion of this project and the date units resume regular operations after the changes.

7

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8

Northshore Mining

Northshore MiningActual To Projected Actual - Low-Silica Pellet Production Project

EU EU Description PM PM10 PM2.5 SO2 NOx CO2e PM PM10 PM2.5 SO2 NOx CO2eton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr ton/yr

EU 007 Car Dump E 0.01 0.01 0.00 0.00 0.00 0.00EU 008 Car Dump W 0.05 0.07 0.01 0.02 0.03 0.01EU 009 FC Bins W 0.01 0.03 0.00 0.00 0.00 0.00EU 010 FC Bins E 0.01 0.01 0.00 0.01 0.01 0.00EU 012 Crusher Line 3 0.00 0.00 0.00 0.00 0.00 0.00EU 013 Crusher Line 2 0.00 0.01 0.00 0.00 0.00 0.00EU 014 Crusher Line 1 0.00 0.01 0.00 0.00 0.01 0.00EU 015 FC Conveyors W 0.00 0.01 0.00 0.00 0.00 0.00EU 016 FC Conveyors E 0.00 0.01 0.00 0.00 0.01 0.00EU 017 Crusher Line 101 0.00 0.00 0.00 0.00 0.00 0.00EU 018 Crusher Line 102 0.00 0.00 0.00 0.00 0.00 0.00EU 019 Crusher Line 103 0.00 0.00 0.00 0.00 0.00 0.00EU 021 Dry Cob 0.04 0.06 0.01 0.02 0.02 0.00EU 022 Dry Cob 0.00 0.01 0.00 0.00 0.00 0.00EU 023 Dry Cob 0.00 0.01 0.00 0.00 0.00 0.00EU 024 Dry Cob 0.00 0.01 0.00 0.00 0.00 0.00EU 025 Dry Cob 0.04 0.06 0.01 0.02 0.02 0.00EU 026 Tails Belts 0.00 0.01 0.00 0.00 0.00 0.00EU 027 Tails Belts 0.00 0.01 0.00 0.00 0.00 0.00EU 028 Tails Belts 0.00 0.00 0.00 0.00 0.00 0.00EU 029 Tails Belts 0.00 0.00 0.00 0.00 0.00 0.00EU 030 Conc Transfer Bin W 0.00 0.00 0.00 0.00 0.00 0.00EU 031 Conc Transfer Bin E 0.00 0.00 0.00 0.00 0.00 0.00EU 036 Concentrator Section 5 0.00 0.00 0.00 0.00 0.00 0.00EU 037 Concentrator Section 6 0.00 0.01 0.00 0.00 0.00 0.00EU 038 Concentrator Section 7 0.00 0.01 0.00 0.00 0.00 0.00EU 039 Concentrator Section 8 0.00 0.01 0.00 0.00 0.00 0.00EU 040 Concentrator Section 9 0.00 0.01 0.00 0.00 0.00 0.00EU 041 Concentrator Section 10 0.00 0.01 0.00 0.00 0.00 0.00EU 042 Concentrator Section 11 0.00 0.01 0.00 0.00 0.00 0.00EU 044 Concentrator Section 101 0.00 0.01 0.00 0.00 0.00 0.00EU 045 Concentrator Section 102 0.01 0.01 0.00 0.00 0.00 0.00EU 046 Concentrator Section 103 0.00 0.01 0.00 0.00 0.00 0.00EU 047 Concentrator Section 104 0.00 0.01 0.00 0.00 0.00 0.00EU 048 Concentrator Section 105 0.00 0.01 0.00 0.00 0.00 0.00EU 049 Concentrator Section 106 0.00 0.01 0.00 0.00 0.00 0.00EU 050 Concentrator Section 107 0.00 0.01 0.00 0.00 0.00 0.00EU 051 Concentrator Section 108 0.00 0.01 0.00 0.00 0.00 0.00EU 052 Concentrator Section 109 0.01 0.01 0.00 0.00 0.00 0.00EU 053 Concentrator Section 110 0.00 0.01 0.00 0.00 0.00 0.00EU 097 Hearth Layer 0.00 0.00 0.00 0.00 0.00 0.00EU 100 Fce 11 - Hood Exhaust 0.00 0.00 0.00 0.00 0.00 -4,978 0.00 0.00 0.00 0.00 0.00 0.00EU 104 Fce 11 - Waste Gas 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00EU 110 Fce 12 - Hood Exhaust 0.00 0.00 0.00 0.00 0.00 -3,671 0.00 0.00 0.00 0.00 0.00 0.00EU 114 Fce 12 - Waste Gas 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00EU 120 Fce 11 Discharge 0.00 0.00 0.00 0.00 0.00 0.00EU 121 Fce 12 Discharge 0.00 0.00 0.00 0.00 0.00 0.00EU 122 Fce 11 Screening 0.00 0.00 0.00 0.00 0.00 0.00EU 123 Screenhouse - North 0.00 0.00 0.00 0.00 0.00 0.00EU 124 Fce 12 Screening 0.00 0.00 0.00 0.00 0.00 0.00EU 125 Screenhouse - South 0.00 0.00 0.00 0.00 0.00 0.00EU 262 Furnace 6 Hood Exhaust/Waste Gas 0.32 1.38 0.12 0.07 4.82 3,485 0.00 0.00 0.00 0.00 0.00 0.00EU 265 Furnace 6 Discharge 0.24 0.34 0.09 0.07 4.82 2,734 0.00 0.00 0.00 0.00 0.00 0.00EU 634 Furnace 5 Hood Exhaust/Waste Gas 0.72 2.93 0.27 0.00 0.00 0.00EU 635 Furnace 5 Discharge 0.06 0.09 0.02 0.00 0.00 0.00EU 636 60A to 60B Transfer and 5x12 Screen -7.87 -6.69 -1.16 0.00 0.00 0.00FS 010a Conveyor 60A to 40 -0.72 -0.33 -0.11 0.00 0.00 0.00FS 011a Cconveyor 40 to cooling pile -0.22 -0.10 -0.03 0.00 0.00 0.00FS 011b Conveyor 41 to 42 -0.72 -0.33 -0.11 0.00 0.00 0.00FS 012a Wind erosion from cooling pile 0.00 0.00 0.00 0.00 0.00 0.00FS 013a 160 to 161 -0.36 -0.17 -0.05 0.00 0.00 0.00FS 013b 161 to 62/162 -0.36 -0.17 -0.05 0.00 0.00 0.00FS 013c 62/162 to 63/163 -0.36 -0.17 -0.05 0.00 0.00 0.00FS 013d 63/163 to Bridge 0.00 0.00 0.00 0.00 0.00 0.00FS 013e Bridge to stockpile -0.01 0.00 0.00 0.00 0.00 0.00EU 637 60B to 61EU 638 61 to IEU 639 I to JFS 013f J to stockpileFS 014 Pellet Handling - Boatloading -0.05 -0.09 -0.01 0.00 0.00 0.00FS 015 Pellet Handling - Wind Erosion from Pile 0.00 0.00 0.00 0.00 0.00 0.00FS 016a FEL Reclaim -0.31 -0.14 -0.04 0.00 0.00 0.00FS 016b FEL Reclaim to Conveyor -0.31 -0.14 -0.04 0.00 0.00 0.00FS 016c Conveyor to Conveyor -0.31 -0.14 -0.04 0.00 0.00 0.00FS 016d Conveyor to 67 -0.31 -0.14 -0.04 0.00 0.00 0.00FS 016e 67 to 62/162 -0.06 -0.03 -0.01 0.00 0.00 0.00FS 016f 62/162 to 63/163 -0.06 -0.03 -0.01 0.00 0.00 0.00FS 016g 63/163 to bins -0.83 -0.38 -0.12 0.00 0.00 0.00FS 016i FEL Reclaim to ConveyorEU 640 Conveyor to 62/162FS 016k 62/162 to 63/163 0.51 0.23 0.07 0.51 0.23 0.07FS 016l 63/163 to bins 0.68 0.31 0.10 0.68 0.31 0.10FS 017 Pellet Screening - Yard 2.03 2.03 0.30 0.00 0.00 0.00Project Total 4.83 7.82 1.05 0.14 6,218 1.27 0.68 0.20 0.00 0.00

Projected Emissions Increases (PAE-BAE) with No Excludable Projected Emissions Increases (PAE-BAE-CHAE)

9

Northshore Mining

Northshore MiningBaseline Actual Emissions - Low-Silica Pellet Production Project

PM-10 Baseline Actual Emissions

EU EU DescriptionNew /

Existing Unit

NSPSNew

Source ThroughputTypical Annual

Runtime EF[1]Control

Efficiency [2][3] EF sourceAnnual

Emissionstons/yr hrs/yr lb PM10/hr % ton PM10/yr

EU 007 Car Dump W Existing No 8288273 5172 0.15 na (Stack Test) 3 2011 Stack Test 0.39EU 008 Car Dump E Existing No 8288273 5172 1.4 na (Stack Test) 4 2006 Stack Test 3.62EU 009 FC Bins W Existing No 8289105 4893 0.56 na (Stack Test) 4 2006 Stack Test 1.37EU 010 FC Bins E Existing No 8287441 5172 0.29 na (Stack Test) 4 2011 Stack Test 0.75EU 012 Crusher Line 3 Existing No 2851770 4847 0.06 na (Stack Test) 9 2008 Stack Test 0.15EU 013 Crusher Line 2 Existing No 2716922 4854 0.12 na (Stack Test) 7 2007 Stack Test 0.29EU 014 Crusher Line 1 Existing No 2720412 4893 0.25 na (Stack Test) 7 2007 Stack Test 0.61EU 015 FC Conveyors W Existing No 8289105 4893 0.22 na (Stack Test) 10 2005 Stack Test 0.54EU 016 FC Conveyors E Existing No 8287441 5172 0.29 na (Stack Test) 7 2010 Stack Test 0.75EU 017 Crusher Line 101 Existing No 2459679 4591 0.037 na (Stack Test) 5 2011 Stack Test 0.08EU 018 Crusher Line 102 Existing No 3091831 5172 0.033 na (Stack Test) 5 2011 Stack Test 0.09EU 019 Crusher Line 103 Existing No 2735931 5084 0.08 na (Stack Test) 9 2008 Stack Test 0.20EU 021 Dry Cob Existing No 3315309 5172 1.12 na (Stack Test) 10 2005 Stack Test 2.90EU 022 Dry Cob Existing No 3315309 5172 0.22 na (Stack Test) Estimate from Other lines 0.57EU 023 Dry Cob Existing No 3315309 5172 0.22 na (Stack Test) 12 2009 Stack Test 0.57EU 024 Dry Cob Existing No 3315309 5172 0.22 na (Stack Test) Estimate from Other lines 0.57EU 025 Dry Cob Existing No 3315309 5172 1.12 na (Stack Test) Estimate from Other lines 2.90EU 026 Tails Belts Existing No 2486482 6994 0.1 na (Stack Test) 11 2005 Stack Test 0.35EU 027 Tails Belts Existing No 2486482 6994 0.1 na (Stack Test) Estimate from Other lines 0.35EU 028 Tails Belts Existing No 2486482 6994 0.031 na (Stack Test) Estimate from Other lines 0.11EU 029 Tails Belts Existing No 2486482 6994 0.031 na (Stack Test) 7 2010 Stack Test 0.11EU 030 Conc Transfer Bin W Existing No 7045032 5172 0.08 na (Stack Test) 11 2010 Stack Test 0.21EU 031 Conc Transfer Bin E Existing No 7045032 5172 0.093 na (Stack Test) 10 2005 Stack Test 0.24EU 036 Concentrator Section 5 Existing No 123660 1026 0.16 na (Stack Test) March 2011 Stack Test 0.08EU 037 Concentrator Section 6 Existing No 712261 5764 0.16 na (Stack Test) March 2011 Stack Test 0.46EU 038 Concentrator Section 7 Existing No 846752 6323 0.16 na (Stack Test) March 2011 Stack Test 0.51EU 039 Concentrator Section 8 Existing No 971248 6994 0.16 na (Stack Test) March 2011 Stack Test 0.56EU 040 Concentrator Section 9 Existing No 809950 6087 0.16 na (Stack Test) March 2011 Stack Test 0.49EU 041 Concentrator Section 10 Existing No 916497 6691 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 042 Concentrator Section 11 Existing No 789978 5845 0.16 na (Stack Test) March 2011 Stack Test 0.47EU 044 Concentrator Section 101 Existing No 881399 6009 0.16 na (Stack Test) March 2011 Stack Test 0.48EU 045 Concentrator Section 102 Existing No 891334 6639 0.16 na (Stack Test) March 2011 Stack Test 0.53EU 046 Concentrator Section 103 Existing No 899225 6486 0.16 na (Stack Test) March 2011 Stack Test 0.52EU 047 Concentrator Section 104 Existing No 916815 6391 0.16 na (Stack Test) March 2011 Stack Test 0.51EU 048 Concentrator Section 105 Existing No 928241 6534 0.16 na (Stack Test) March 2011 Stack Test 0.52EU 049 Concentrator Section 106 Existing No 952936 6724 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 050 Concentrator Section 107 Existing No 898845 6774 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 051 Concentrator Section 108 Existing No 987756 6867 0.16 na (Stack Test) March 2011 Stack Test 0.55EU 052 Concentrator Section 109 Existing No 905229 6737 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 053 Concentrator Section 110 Existing No 901531 6565 0.16 na (Stack Test) March 2011 Stack Test 0.53EU 097 Hearth Layer Existing No 312483 7611 0.58 na (Stack Test) 9 2009 Stack Test 2.21EU 100 Fce 11 - Hood Exhaust Existing No 1974122 7611 25.8 na (Stack Test) 2 2011 Stack Test 98.18EU 104 Fce 11 - Waste Gas Existing No 1974122 7611 15.6 na (Stack Test) 2 2011 Stack Test 59.37EU 110 Fce 12 - Hood Exhaust Existing No 1931910 7782 19.8 na (Stack Test) 2 2008 Stack Test 77.04EU 114 Fce 12 - Waste Gas Existing No 1931910 7782 7 na (Stack Test) 2 2008 Stack Test 27.24EU 120 Fce 11 Discharge Existing No 1974122 7611 2 na (Stack Test) 6 2006 Stack Test 7.61EU 121 Fce 12 Discharge Existing No 1931910 7782 0.7 na (Stack Test) 12 2009 Stack Test 2.72EU 122 Fce 11 Screening Existing No 1974122 7611 0.96 na (Stack Test) 12 2009 Stack Test 3.65EU 123 Screenhouse - North Existing No 1974122 7611 0.96 na (Stack Test) 12 2009 Stack Test 3.65EU 124 Fce 12 Screening Existing No 1931910 7782 0.96 na (Stack Test) 12 2009 Stack Test 3.74EU 125 Screenhouse - South Existing No 1931910 7782 0.96 na (Stack Test) 12 2009 Stack Test 3.74EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 776913 7181 8.1 na (Stack Test) November 2011 Stack Test 29.08EU 265 Furnace 6 Discharge Existing No 776913 7181 2 na (Stack Test) June 2006 Stack Test 7.18EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 796376 7198 17.1 na (Stack Test) August 2008 Stack Test 61.55EU 635 Furnace 5 Discharge Existing No 796376 7198 0.53 na (Stack Test) January 2011 Stack Test 1.91EU 636 60A to 60B Transfer and 5x12 Screen Existing No 1573288 7181 0.085 90% (lb/ton) (AP-42) w/90% control 6.69FS 010a Conveyor 60A to 40 Existing No 5479320 7782 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.99FS 011a Cconveyor 40 to cooling pile Existing No 1643796 7782 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.30FS 011b Conveyor 41 to 42 Existing No 5479320 7782 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.99FS 012a Wind erosion from cooling pile Existing No 1 8760 944.7 90% (lb/acre) - assume 60% max pile size as annual avg. 0.06FS 013a 160 to 161 Existing No 5479320 7611 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49FS 013b 161 to 62/162 Existing No 5479320 7611 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49FS 013c 62/162 to 63/163 Existing No 5479320 7611 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49FS 013d 63/163 to Bridge Existing No 2739660 7611 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.25FS 013e Bridge to stockpile Existing No 2739660 7611 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49EU 637 60B to 61 New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00EU 638 61 to I New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00EU 639 I to J New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00FS 013f J to stockpile New No 0 0 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00FS 014 Pellet Handling - Boatloading Existing No 5753286 1000 0.0072 80% (lb/ton) - 4 xfers at 0.0018lb/ton ea 4.14FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21 8760 944.7 90% (lb/acre) - assume 60% max pile size as annual avg. 1.00FS 016a FEL Reclaim Existing No 2876643 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.59FS 016b FEL Reclaim to Conveyor Existing No 2876643 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.59FS 016c Conveyor to Conveyor Existing No 2876643 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.59FS 016d Conveyor to 67 Existing No 2876643 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.59FS 016e 67 to 62/162 Existing No 2876643 4400 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.52FS 016f 62/162 to 63/163 Existing No 2876643 4400 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.52FS 016g 63/163 to bins Existing No 5753286 4400 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 1.04FS 016h FEL Reclaim to Conveyor New No 0 0 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00EU 640 Conveyor to 62/162 New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00FS 016k 62/162 to 63/163 Existing No 0 2200 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00FS 016l 63/163 to bins Existing No 0 2200 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00FS 017 Pellet Screening - Yard Existing No 1438322 2800 0.071 90% (lb/ton) (AP-42) 5.11

10

Northshore Mining

PM (TSP) Baseline Actual Emissions

EU EU Description ThroughputTypical Annual



Emissionstons/yr hrs/yr lb PM/hr % ton PM/yr

EU 007 Car Dump W Existing No 8288273 5172 0.15 na (Stack Test) 3 2011 Stack Test 0.39EU 008 Car Dump E Existing No 8288273 5172 1.10 na (Stack Test) 4 2006 Stack Test 2.84EU 009 FC Bins W Existing No 8289105 4893 0.28 na (Stack Test) 4 2006 Stack Test 0.68EU 010 FC Bins E Existing No 8287441 5172 0.29 na (Stack Test) 4 2011 Stack Test 0.75EU 012 Crusher Line 3 Existing No 2851770 4847 0.00 na (Stack Test) 9 2008 Stack Test 0.00EU 013 Crusher Line 2 Existing No 2716922 4854 0.06 na (Stack Test) 7 2007 Stack Test 0.15EU 014 Crusher Line 1 Existing No 2720412 4893 0.09 na (Stack Test) 7 2007 Stack Test 0.22EU 015 FC Conveyors W Existing No 8289105 4893 0.08 na (Stack Test) 10 2005 Stack Test 0.20EU 016 FC Conveyors E Existing No 8287441 5172 0.07 na (Stack Test) 7 2010 Stack Test 0.18EU 017 Crusher Line 101 Existing No 2459679 4591 0.04 na (Stack Test) 5 2011 Stack Test 0.08EU 018 Crusher Line 102 Existing No 3091831 5172 0.03 na (Stack Test) 5 2011 Stack Test 0.09EU 019 Crusher Line 103 Existing No 2735931 5084 0.02 na (Stack Test) 9 2008 Stack Test 0.05EU 021 Dry Cob Existing No 3315309 5172 0.77 na (Stack Test) 10 2005 Stack Test 1.99EU 022 Dry Cob Existing No 3315309 5172 0.08 na (Stack Test) Estimate from Other lines 0.21EU 023 Dry Cob Existing No 3315309 5172 0.08 na (Stack Test) 12 2009 Stack Test 0.21EU 024 Dry Cob Existing No 3315309 5172 0.08 na (Stack Test) Estimate from Other lines 0.21EU 025 Dry Cob Existing No 3315309 5172 0.77 na (Stack Test) Estimate from Other lines 1.99EU 026 Tails Belts Existing No 2486482 6994 0.07 na (Stack Test) 11 2005 Stack Test 0.24EU 027 Tails Belts Existing No 2486482 6994 0.07 na (Stack Test) Estimate from Other lines 0.24EU 028 Tails Belts Existing No 2486482 6994 0.01 na (Stack Test) Estimate from Other lines 0.03EU 029 Tails Belts Existing No 2486482 6994 0.01 na (Stack Test) 7 2010 Stack Test 0.03EU 030 Conc Transfer Bin W Existing No 7045032 5172 0.04 na (Stack Test) 11 2010 Stack Test 0.10EU 031 Conc Transfer Bin E Existing No 7045032 5172 0.039 na (Stack Test) 10 2005 Stack Test 0.10EU 036 Concentrator Section 5 Existing No 123660 1026 0.04 na (Stack Test) March 2011 Stack Test 0.02EU 037 Concentrator Section 6 Existing No 712261 5764 0.04 na (Stack Test) March 2011 Stack Test 0.10EU 038 Concentrator Section 7 Existing No 846752 6323 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 039 Concentrator Section 8 Existing No 971248 6994 0.04 na (Stack Test) March 2011 Stack Test 0.12EU 040 Concentrator Section 9 Existing No 809950 6087 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 041 Concentrator Section 10 Existing No 916497 6691 0.04 na (Stack Test) March 2011 Stack Test 0.12EU 042 Concentrator Section 11 Existing No 789978 5845 0.04 na (Stack Test) March 2011 Stack Test 0.10EU 044 Concentrator Section 101 Existing No 881399 6009 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 045 Concentrator Section 102 Existing No 891334 6639 0.16 na (Stack Test) March 2011 Stack Test 0.53EU 046 Concentrator Section 103 Existing No 899225 6486 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 047 Concentrator Section 104 Existing No 916815 6391 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 048 Concentrator Section 105 Existing No 928241 6534 0.08 na (Stack Test) March 2011 Stack Test 0.25EU 049 Concentrator Section 106 Existing No 952936 6724 0.08 na (Stack Test) March 2011 Stack Test 0.26EU 050 Concentrator Section 107 Existing No 898845 6774 0.08 na (Stack Test) March 2011 Stack Test 0.26EU 051 Concentrator Section 108 Existing No 987756 6867 0.08 na (Stack Test) March 2011 Stack Test 0.26EU 052 Concentrator Section 109 Existing No 905229 6737 0.09 na (Stack Test) March 2011 Stack Test 0.30EU 053 Concentrator Section 110 Existing No 901531 6565 0.08 na (Stack Test) March 2011 Stack Test 0.25EU 097 Hearth Layer Existing No 312483 7611 0.16 na (Stack Test) 9 2009 Stack Test 0.61EU 100 Fce 11 - Hood Exhaust Existing No 1974122 7611 8.1 na (Stack Test) 2 2011 Stack Test 30.82EU 104 Fce 11 - Waste Gas Existing No 1974122 7611 6.6 na (Stack Test) 2 2011 Stack Test 25.12EU 110 Fce 12 - Hood Exhaust Existing No 1931910 7782 3.8 na (Stack Test) 2 2008 Stack Test 14.79EU 114 Fce 12 - Waste Gas Existing No 1931910 7782 1.2 na (Stack Test) 2 2008 Stack Test 4.67EU 120 Fce 11 Discharge Existing No 1974122 7611 1.4 na (Stack Test) 6 2006 Stack Test 5.33EU 121 Fce 12 Discharge Existing No 1931910 7782 0.5 na (Stack Test) 12 2009 Stack Test 1.95EU 122 Fce 11 Screening Existing No 1974122 7611 0.7 na (Stack Test) 12 2009 Stack Test 2.66EU 123 Screenhouse - North Existing No 1974122 7611 0.7 na (Stack Test) 12 2009 Stack Test 2.66EU 124 Fce 12 Screening Existing No 1931910 7782 0.7 na (Stack Test) 12 2009 Stack Test 2.72EU 125 Screenhouse - South Existing No 1931910 7782 0.7 na (Stack Test) 12 2009 Stack Test 2.72EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 776913 7181 1.9 na (Stack Test) November 2011 Stack Test 6.82EU 265 Furnace 6 Discharge Existing No 776913 7181 1.4 na (Stack Test) June 2006 Stack Test 5.03EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 796376 7198 4.2 na (Stack Test) August 2008 Stack Test 15.12EU 635 Furnace 5 Discharge Existing No 796376 7198 0.36 na (Stack Test) January 2011 Stack Test 1.30EU 636 60A to 60B Transfer and 5x12 Screen Existing No 1573288 7181 0.1 90% (lb/ton) (AP-42) w/90% control 7.87FS 010a Conveyor 60A to 40 Existing No 5479320 7782 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.14FS 011a Cconveyor 40 to cooling pile Existing No 1643796 7782 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.64FS 011b Conveyor 41 to 42 Existing No 5479320 7782 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.14FS 012a Wind erosion from cooling pile Existing No 1.2 8760 1889.4 90% (lb/acre) - assume 60% max pile size as annual avg. 0.11FS 013a 160 to 161 Existing No 5479320 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.07FS 013b 161 to 62/162 Existing No 5479320 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.07FS 013c 62/162 to 63/163 Existing No 5479320 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.07FS 013d 63/163 to Bridge Existing No 2739660 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.53FS 013e Bridge to stockpile Existing No 2739660 7611 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.07EU 637 60B to 61 New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00EU 638 61 to I New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00EU 639 I to J New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00FS 013f J to stockpile New No 0 0 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00FS 014 Pellet Handling - Boatloading Existing No 5753286 1000 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.24FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21 8760 1889.4 90% (lb/acre) - assume 60% max pile size as annual avg. 2.00FS 016a FEL Reclaim Existing No 2876643 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.61FS 016b FEL Reclaim to Conveyor Existing No 2876643 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.61FS 016c Conveyor to Conveyor Existing No 2876643 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.61FS 016d Conveyor to 67 Existing No 2876643 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.61FS 016e 67 to 62/162 Existing No 2876643 4400 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.12FS 016f 62/162 to 63/163 Existing No 2876643 4400 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.12FS 016g 63/163 to bins Existing No 5753286 4400 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.24FS 016h FEL Reclaim to Conveyor New No 0 0 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00EU 640 Conveyor to 62/162 New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00FS 016k 62/162 to 63/163 Existing No 0 2200 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00FS 016l 63/163 to bins Existing No 0 2200 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00FS 017 Pellet Screening - Yard Existing No 1438322 2800 0.071 90% (lb/ton) (AP-42) 5.11

11

Northshore Mining

PM-2.5 Baseline Actual Emissions


Existing Unit

NSPSNew




Emissionstons/yr hrs/yr lb PM2.5/hr % ton PM2.5/yr

EU 007 Car Dump E Existing No 8288273 5172 0.0402 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.10EU 008 Car Dump W Existing No 8288273 5172 0.2948 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.76EU 009 FC Bins W Existing No 8289105 4893 0.0750 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.18EU 010 FC Bins E Existing No 8287441 5172 0.0777 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.20EU 012 Crusher Line 3 Existing No 2851770 4847 0.0000 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.00EU 013 Crusher Line 2 Existing No 2716922 4854 0.0161 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04EU 014 Crusher Line 1 Existing No 2720412 4893 0.0241 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 015 FC Conveyors W Existing No 8289105 4893 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.05EU 016 FC Conveyors E Existing No 8287441 5172 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.05EU 017 Crusher Line 101 Existing No 2459679 4591 0.0099 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.02EU 018 Crusher Line 102 Existing No 3091831 5172 0.0088 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.02EU 019 Crusher Line 103 Existing No 2735931 5084 0.0054 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01EU 021 Dry Cob Existing No 3315309 5172 0.2064 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.53EU 022 Dry Cob Existing No 3315309 5172 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 023 Dry Cob Existing No 3315309 5172 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 024 Dry Cob Existing No 3315309 5172 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 025 Dry Cob Existing No 3315309 5172 0.2064 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.53EU 026 Tails Belts Existing No 2486482 6994 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 027 Tails Belts Existing No 2486482 6994 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 028 Tails Belts Existing No 2486482 6994 0.0023 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01EU 029 Tails Belts Existing No 2486482 6994 0.0027 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01EU 030 Conc Transfer Bin W Existing No 7045032 5172 0.0107 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 031 Conc Transfer Bin E Existing No 7045032 5172 0.0105 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 036 Concentrator Section 5 Existing No 123660 1026 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.00EU 037 Concentrator Section 6 Existing No 712261 5764 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 038 Concentrator Section 7 Existing No 846752 6323 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 039 Concentrator Section 8 Existing No 971248 6994 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 040 Concentrator Section 9 Existing No 809950 6087 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 041 Concentrator Section 10 Existing No 916497 6691 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 042 Concentrator Section 11 Existing No 789978 5845 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 044 Concentrator Section 101 Existing No 881399 6009 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 045 Concentrator Section 102 Existing No 891334 6639 0.0429 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.14EU 046 Concentrator Section 103 Existing No 899225 6486 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 047 Concentrator Section 104 Existing No 916815 6391 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 048 Concentrator Section 105 Existing No 928241 6534 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 049 Concentrator Section 106 Existing No 952936 6724 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 050 Concentrator Section 107 Existing No 898845 6774 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 051 Concentrator Section 108 Existing No 987756 6867 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 052 Concentrator Section 109 Existing No 905229 6737 0.0241 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08EU 053 Concentrator Section 110 Existing No 901531 6565 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 097 Hearth Layer Existing No 312483 7611 0.1304 na (Stack Test) PM 2.5 Stack Test F12, 2011 0.50EU 100 Fce 11 - Hood Exhaust Existing No 1974122 7611 6.6015 na (Stack Test) PM 2.5 Stack Test F12, 2011 25.12EU 104 Fce 11 - Waste Gas Existing No 1974122 7611 5.3790 na (Stack Test) PM 2.5 Stack Test F12, 2011 20.47EU 110 Fce 12 - Hood Exhaust Existing No 1931910 7782 3.0970 na (Stack Test) PM 2.5 Stack Test F12, 2011 12.05EU 114 Fce 12 - Waste Gas Existing No 1931910 7782 0.9780 na (Stack Test) PM 2.5 Stack Test F12, 2011 3.81EU 120 Fce 11 Discharge Existing No 1974122 7611 1.1410 na (Stack Test) PM 2.5 Stack Test F12, 2011 4.34EU 121 Fce 12 Discharge Existing No 1931910 7782 0.4075 na (Stack Test) PM 2.5 Stack Test F12, 2011 1.59EU 122 Fce 11 Screening Existing No 1974122 7611 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.17EU 123 Screenhouse - North Existing No 1974122 7611 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.17EU 124 Fce 12 Screening Existing No 1931910 7782 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.22EU 125 Screenhouse - South Existing No 1931910 7782 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.22EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 776913 7181 0.7125 na (Stack Test) PM 2.5 Stack Test F6, 2011 2.56EU 265 Furnace 6 Discharge Existing No 776913 7181 0.5250 na (Stack Test) PM 2.5 Stack Test F6, 2011 1.89EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 796376 7198 1.5750 na (Stack Test) PM 2.5 Stack Test F6, 2011 5.67EU 635 Furnace 5 Discharge Existing No 796376 7198 0.1350 na (Stack Test) PM 2.5 Stack Test F6, 2011 0.49EU 636 60A to 60B Transfer and 5x12 Screen Existing No 1573288 7181 0.0147 90% Ambient filter analysis 1.16FS 010a Conveyor 60A to 40 Existing No 5479320 7782 0.0006 80% Ambient filter analysis 0.31FS 011a Cconveyor 40 to cooling pile Existing No 1643796 7782 0.0006 80% Ambient filter analysis 0.09FS 011b Conveyor 41 to 42 Existing No 5479320 7782 0.0006 80% Ambient filter analysis 0.31FS 012a Wind erosion from cooling pile Existing No 1.2 8760 277.7418 90% Ambient filter analysis 0.02FS 013a 160 to 161 Existing No 5479320 7611 0.0006 90% Ambient filter analysis 0.16FS 013b 161 to 62/162 Existing No 5479320 7611 0.0006 90% Ambient filter analysis 0.16FS 013c 62/162 to 63/163 Existing No 5479320 7611 0.0006 90% Ambient filter analysis 0.16FS 013d 63/163 to Bridge Existing No 2739660 7611 0.0006 90% Ambient filter analysis 0.08FS 013e Bridge to stockpile Existing No 2739660 7611 0.0006 80% Ambient filter analysis 0.16EU 637 60B to 61 New Yes 0 0 0.0006 80% Ambient filter analysis 0.00EU 638 61 to I New Yes 0 0 0.0006 80% Ambient filter analysis 0.00EU 639 I to J New Yes 0 0 0.0006 80% Ambient filter analysis 0.00FS 013f J to stockpile New No 0 0 0.0006 0% Ambient filter analysis 0.00FS 014 Pellet Handling - Boatloading Existing No 5753286 1000 0.0006 80% Ambient filter analysis 0.33FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21.2 8760 277.7418 90% Ambient filter analysis 0.29FS 016a FEL Reclaim Existing No 2876643 4400 0.0006 0% Ambient filter analysis 0.82FS 016b FEL Reclaim to Conveyor Existing No 2876643 4400 0.0006 0% Ambient filter analysis 0.82FS 016c Conveyor to Conveyor Existing No 2876643 4400 0.0006 0% Ambient filter analysis 0.82FS 016d Conveyor to 67 Existing No 2876643 4400 0.0006 0% Ambient filter analysis 0.82FS 016e 67 to 62/162 Existing No 2876643 4400 0.0006 80% Ambient filter analysis 0.16FS 016f 62/162 to 63/163 Existing No 2876643 4400 0.0006 80% Ambient filter analysis 0.16FS 016g 63/163 to bins Existing No 5753286 4400 0.0006 80% Ambient filter analysis 0.33FS 016h FEL Reclaim to Conveyor New No 0 0 0.0006 0% Ambient filter analysis 0.00EU 640 Conveyor to 62/162 New Yes 0 0 0.0006 80% Ambient filter analysis 0.00FS 016k 62/162 to 63/163 Existing No 0 2200 0.0006 80% Ambient filter analysis 0.00FS 016l 63/163 to bins Existing No 0 2200 0.0006 80% Ambient filter analysis 0.00FS 017 Pellet Screening - Yard Existing No 1438322 2800 0.0104 90% Ambient filter analysis 0.75

12

Northshore Mining

SO2 Baseline Actual Emissions


Runtime EFControl

Efficiency EF sourceAnnual

Emissionstons/yr hrs/yr lb SO2/hr % ton SO2/yr

EU 100 Fce 11 - Hood Exhaust 1974121.72 7610.96 1.9 na (Stack Test) 2010 Stack Test 7.23EU 104 Fce 11 - Waste Gas 1974121.72 7610.96 1.9 na (Stack Test) 2010 Stack Test 7.23EU 110 Fce 12 - Hood Exhaust 1931909.8 7781.72 1.9 na (Stack Test) 2010 Stack Test 7.39EU 114 Fce 12 - Waste Gas 1931909.8 7781.72 1.9 na (Stack Test) 2010 Stack Test 7.39EU 262 Furnace 6 Hood Exhaust/Waste Gas 776912.913 7180.98 0.42 na (Stack Test) August 2008 Stack Test 1.51EU 634 Furnace 5 Hood Exhaust/Waste Gas 796375.567 7198.385 0.42 na (Stack Test) August 2008 Stack Test 1.51

NOx Baseline Actual Emissions


Runtime EFControl


Emissionstons/yr hrs/yr lb NOx/hr % ton NOx/yr

EU 100 Fce 11 - Hood Exhaust 1974121.72 7610.96 12 na (Stack Test) July 2006 Stack Test 45.67EU 104 Fce 11 - Waste Gas 1974121.72 7610.96 74 na (Stack Test) July 2010 Stack Test 281.61EU 110 Fce 12 - Hood Exhaust 1931909.8 7781.72 12 na (Stack Test) July 2006 Stack Test 46.69EU 114 Fce 12 - Waste Gas 1931909.8 7781.72 74 na (Stack Test) July 2006 Stack Test 287.92EU 262 Furnace 6 Hood Exhaust/Waste Gas 776912.913 7180.98 28.2 na (Stack Test) December 2005 Stack Test 101.25EU 634 Furnace 5 Hood Exhaust/Waste Gas 796375.567 7198.385 28.2 na (Stack Test) December 2005 Stack Test 101.50

GHG Baseline Actual Emissions


Runtime EFControl


Emissionstons/yr hrs/yr lb CO2e/ton % ton NOx/yr

EU 100 Fce 11 - Hood Exhaust 1974121.72 7610.96 61.91 NA 2012 GHG report for this unit 61,108EU 104 Fce 11 - Waste GasEU 110 Fce 12 - Hood Exhaust 1931909.8 7781.72 61.91 NA 2012 GHG report for this unit 59,802EU 114 Fce 12 - Waste GasEU 262 Furnace 6 Hood Exhaust/Waste Gas 776912.913 7180.98 77.15 NA 2012 GHG report for this unit 29,971EU 634 Furnace 5 Hood Exhaust/Waste Gas 796375.567 7198.385 77.15 NA 2012 GHG report for this unit 30,721

[1] EF = k x 0.0032 x (U/5)^1.3 / (M/2)^1.4 lb/tonSource = "AP-42: Compilation of Air Pollutant Emission Factors", 5th Edn., January 1995, Page 13.2.4-3k = particle size multiplier k for PM=0.74, PM10=0.35, PM2.5=0.053U = mean wind speed (mph) Source: "Climates of the States", Vol. II, Water Information Center, 1974 for International Falls, MN.

9.3 mph (use 1mph inside buildings)M = moisture content (%). Source: Pellet Boat Moistures

1.5 % for Product Pellets[2] Control efficiency (90%) assumed for water spraying plus emission sources located inside a building[3] Control efficiency (80%) assumed for watering

13

Northshore Mining

Northshore MiningProjected Actual Emissions - Low-Silica Pellet Production Project

PM-10 Projected Actual Emissions


Existing Unit

NSPSNew




Emissionstons/yr hrs/yr lb PM10/hr % ton PM10/yr

EU 007 Car Dump E Existing No 8445750 5270 0.15 na (Stack Test) 3 2011 Stack Test 0.40EU 008 Car Dump W Existing No 8445750 5270 1.4 na (Stack Test) 4 2006 Stack Test 3.69EU 009 FC Bins W Existing No 8446598 4986 0.56 na (Stack Test) 4 2006 Stack Test 1.40EU 010 FC Bins E Existing No 8444902 5270 0.29 na (Stack Test) 4 2011 Stack Test 0.76EU 012 Crusher Line 3 Existing No 2905954 4939 0.06 na (Stack Test) 9 2008 Stack Test 0.15EU 013 Crusher Line 2 Existing No 2768544 4946 0.12 na (Stack Test) 7 2007 Stack Test 0.30EU 014 Crusher Line 1 Existing No 2772100 4986 0.25 na (Stack Test) 7 2007 Stack Test 0.62EU 015 FC Conveyors W Existing No 8446598 4986 0.22 na (Stack Test) 10 2005 Stack Test 0.55EU 016 FC Conveyors E Existing No 8444902 5270 0.29 na (Stack Test) 7 2010 Stack Test 0.76EU 017 Crusher Line 101 Existing No 2506413 4679 0.037 na (Stack Test) 5 2011 Stack Test 0.09EU 018 Crusher Line 102 Existing No 3150576 5270 0.033 na (Stack Test) 5 2011 Stack Test 0.09EU 019 Crusher Line 103 Existing No 2787914 5181 0.08 na (Stack Test) 9 2008 Stack Test 0.21EU 021 Dry Cob Existing No 3378300 5270 1.12 na (Stack Test) 10 2005 Stack Test 2.95EU 022 Dry Cob Existing No 3378300 5270 0.22 na (Stack Test) Estimate from Other lines 0.58EU 023 Dry Cob Existing No 3378300 5270 0.22 na (Stack Test) 12 2009 Stack Test 0.58EU 024 Dry Cob Existing No 3378300 5270 0.22 na (Stack Test) Estimate from Other lines 0.58EU 025 Dry Cob Existing No 3378300 5270 1.12 na (Stack Test) Estimate from Other lines 2.95EU 026 Tails Belts Existing No 2533725 7127 0.1 na (Stack Test) 11 2005 Stack Test 0.36EU 027 Tails Belts Existing No 2533725 7127 0.1 na (Stack Test) Estimate from Other lines 0.36EU 028 Tails Belts Existing No 2533725 7127 0.031 na (Stack Test) Estimate from Other lines 0.11EU 029 Tails Belts Existing No 2533725 7127 0.031 na (Stack Test) 7 2010 Stack Test 0.11EU 030 Conc Transfer Bin W Existing No 7178887 5270 0.08 na (Stack Test) 11 2010 Stack Test 0.21EU 031 Conc Transfer Bin E Existing No 7178887 5270 0.093 na (Stack Test) 10 2005 Stack Test 0.25EU 036 Concentrator Section 5 Existing No 126010 1045 0.16 na (Stack Test) March 2011 Stack Test 0.08EU 037 Concentrator Section 6 Existing No 725794 5873 0.16 na (Stack Test) March 2011 Stack Test 0.47EU 038 Concentrator Section 7 Existing No 862841 6444 0.16 na (Stack Test) March 2011 Stack Test 0.52EU 039 Concentrator Section 8 Existing No 989702 7127 0.16 na (Stack Test) March 2011 Stack Test 0.57EU 040 Concentrator Section 9 Existing No 825339 6203 0.16 na (Stack Test) March 2011 Stack Test 0.50EU 041 Concentrator Section 10 Existing No 933911 6818 0.16 na (Stack Test) March 2011 Stack Test 0.55EU 042 Concentrator Section 11 Existing No 804987 5956 0.16 na (Stack Test) March 2011 Stack Test 0.48EU 044 Concentrator Section 101 Existing No 898146 6123 0.16 na (Stack Test) March 2011 Stack Test 0.49EU 045 Concentrator Section 102 Existing No 908269 6766 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 046 Concentrator Section 103 Existing No 916311 6609 0.16 na (Stack Test) March 2011 Stack Test 0.53EU 047 Concentrator Section 104 Existing No 934235 6512 0.16 na (Stack Test) March 2011 Stack Test 0.52EU 048 Concentrator Section 105 Existing No 945877 6659 0.16 na (Stack Test) March 2011 Stack Test 0.53EU 049 Concentrator Section 106 Existing No 971041 6851 0.16 na (Stack Test) March 2011 Stack Test 0.55EU 050 Concentrator Section 107 Existing No 915923 6903 0.16 na (Stack Test) March 2011 Stack Test 0.55EU 051 Concentrator Section 108 Existing No 1006523 6998 0.16 na (Stack Test) March 2011 Stack Test 0.56EU 052 Concentrator Section 109 Existing No 922428 6865 0.16 na (Stack Test) March 2011 Stack Test 0.55EU 053 Concentrator Section 110 Existing No 918660 6690 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 097 Hearth Layer Existing No 290131 7610.96 0.58 na (Stack Test) 9 2009 Stack Test 2.21EU 100 Fce 11 - Hood Exhaust Existing No 1813320 7610.96 25.8 na (Stack Test) 2 2011 Stack Test 98.18EU 104 Fce 11 - Waste Gas Existing No 1813320 7610.96 15.6 na (Stack Test) 2 2011 Stack Test 59.37EU 110 Fce 12 - Hood Exhaust Existing No 1813320 7781.72 19.8 na (Stack Test) 2 2008 Stack Test 77.04EU 114 Fce 12 - Waste Gas Existing No 1813320 7781.72 7 na (Stack Test) 2 2008 Stack Test 27.24EU 120 Fce 11 Discharge Existing No 1813320 7610.96 2 na (Stack Test) 6 2006 Stack Test 7.61EU 121 Fce 12 Discharge Existing No 1813320 7781.72 0.7 na (Stack Test) 12 2009 Stack Test 2.72EU 122 Fce 11 Screening Existing No 1813320 7610.96 0.96 na (Stack Test) 12 2009 Stack Test 3.65EU 123 Screenhouse - North Existing No 1813320 7610.96 0.96 na (Stack Test) 12 2009 Stack Test 3.65EU 124 Fce 12 Screening Existing No 1813320 7781.72 0.96 na (Stack Test) 12 2009 Stack Test 3.74EU 125 Screenhouse - South Existing No 1813320 7781.72 0.96 na (Stack Test) 12 2009 Stack Test 3.74EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 867240 7522.931429 8.1 na (Stack Test) November 2011 Stack Test 30.47EU 265 Furnace 6 Discharge Existing No 867240 7522.931429 2 na (Stack Test) June 2006 Stack Test 7.52EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 867240 7541.165238 17.1 na (Stack Test) August 2008 Stack Test 64.48EU 635 Furnace 5 Discharge Existing No 867240 7541.165238 0.53 na (Stack Test) January 2011 Stack Test 2.00EU 636 60A to 60B Transfer and 5x12 Screen Existing No 0 7180.98 0.085 90% (lb/ton) (AP-42) w/90% control 0.00FS 010a Conveyor 60A to 40 Existing No 3626640 7781.72 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.65FS 011a Cconveyor 40 to cooling pile Existing No 1087992 7781.72 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.20FS 011b Conveyor 41 to 42 Existing No 3626640 7781.72 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.65FS 012a Wind erosion from cooling pile Existing No 1.21 8760 944.7 90% (lb/acre) - assume 60% max pile size as annual avg. 0.06FS 013a 160 to 161 Existing No 3626640 7610.96 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.33FS 013b 161 to 62/162 Existing No 3626640 7610.96 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.33FS 013c 62/162 to 63/163 Existing No 3626640 7610.96 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.33FS 013d 63/163 to Bridge Existing No 2719980 7610.96 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.24FS 013e Bridge to stockpile Existing No 2719980 7610.96 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49EU 637 60B to 61 New Yes 1734480 7522.931429 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.31EU 638 61 to I New Yes 1734480 7522.931429 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.31EU 639 I to J New Yes 1300860 7522.931429 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.23FS 013f J to stockpile New No 1300860 7522.931429 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 1.17FS 014 Pellet Handling - Boatloading Existing No 5629176 1000 0.0072 80% (lb/ton) - 4 xfers at 0.0018lb/ton ea 4.05FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21.2 8760 944.7 90% (lb/acre) - assume 60% max pile size as annual avg. 1.00FS 016a FEL Reclaim Existing No 2719980 2500 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.45FS 016b FEL Reclaim to Conveyor Existing No 2719980 2500 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.45FS 016c Conveyor to Conveyor Existing No 2719980 2500 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.45FS 016d Conveyor to 67 Existing No 2719980 2500 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 2.45FS 016e 67 to 62/162 Existing No 2719980 2500 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49FS 016f 62/162 to 63/163 Existing No 2719980 2500 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.49FS 016g 63/163 to bins Existing No 3626640 2500 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.65FS 016h FEL Reclaim to Conveyor New No 1300860 1900 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 1.17EU 640 Conveyor to 62/162 New Yes 1300860 1900 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.23FS 016k 62/162 to 63/163 Existing No 1300860 1900 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.23FS 016l 63/163 to bins Existing No 1734480 1900 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.31FS 017 Pellet Screening - Yard Existing No 2010420 2800 0.071 90% (lb/ton) (AP-42) 7.14

14

Northshore Mining

PM (TSP) Projected Actual Emissions




Emissionstons/yr hrs/yr lb PM/hr % ton PM/yr

EU 007 Car Dump E Existing No 8445750 5270 0.15 na (Stack Test) 3 2011 Stack Test 0.40EU 008 Car Dump W Existing No 8445750 5270 1.10 na (Stack Test) 4 2006 Stack Test 2.90EU 009 FC Bins W Existing No 8446598 4986 0.28 na (Stack Test) 4 2006 Stack Test 0.70EU 010 FC Bins E Existing No 8444902 5270 0.29 na (Stack Test) 4 2011 Stack Test 0.76EU 012 Crusher Line 3 Existing No 2905954 4939 0.00 na (Stack Test) 9 2008 Stack Test 0.00EU 013 Crusher Line 2 Existing No 2768544 4946 0.06 na (Stack Test) 7 2007 Stack Test 0.15EU 014 Crusher Line 1 Existing No 2772100 4986 0.09 na (Stack Test) 7 2007 Stack Test 0.22EU 015 FC Conveyors W Existing No 8446598 4986 0.08 na (Stack Test) 10 2005 Stack Test 0.20EU 016 FC Conveyors E Existing No 8444902 5270 0.07 na (Stack Test) 7 2010 Stack Test 0.18EU 017 Crusher Line 101 Existing No 2506413 4679 0.04 na (Stack Test) 5 2011 Stack Test 0.09EU 018 Crusher Line 102 Existing No 3150576 5270 0.03 na (Stack Test) 5 2011 Stack Test 0.09EU 019 Crusher Line 103 Existing No 2787914 5181 0.02 na (Stack Test) 9 2008 Stack Test 0.05EU 021 Dry Cob Existing No 3378300 5270 0.77 na (Stack Test) 10 2005 Stack Test 2.03EU 022 Dry Cob Existing No 3378300 5270 0.08 na (Stack Test) Estimate from Other lines 0.21EU 023 Dry Cob Existing No 3378300 5270 0.08 na (Stack Test) 12 2009 Stack Test 0.21EU 024 Dry Cob Existing No 3378300 5270 0.08 na (Stack Test) Estimate from Other lines 0.21EU 025 Dry Cob Existing No 3378300 5270 0.77 na (Stack Test) Estimate from Other lines 2.03EU 026 Tails Belts Existing No 2533725 7127 0.07 na (Stack Test) 11 2005 Stack Test 0.25EU 027 Tails Belts Existing No 2533725 7127 0.07 na (Stack Test) Estimate from Other lines 0.25EU 028 Tails Belts Existing No 2533725 7127 0.01 na (Stack Test) Estimate from Other lines 0.03EU 029 Tails Belts Existing No 2533725 7127 0.01 na (Stack Test) 7 2010 Stack Test 0.04EU 030 Conc Transfer Bin W Existing No 7178887 5270 0.04 na (Stack Test) 11 2010 Stack Test 0.11EU 031 Conc Transfer Bin E Existing No 7178887 5270 0.039 na (Stack Test) 10 2005 Stack Test 0.10EU 036 Concentrator Section 5 Existing No 126010 1045 0.04 na (Stack Test) March 2011 Stack Test 0.02EU 037 Concentrator Section 6 Existing No 725794 5873 0.04 na (Stack Test) March 2011 Stack Test 0.10EU 038 Concentrator Section 7 Existing No 862841 6444 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 039 Concentrator Section 8 Existing No 989702 7127 0.04 na (Stack Test) March 2011 Stack Test 0.12EU 040 Concentrator Section 9 Existing No 825339 6203 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 041 Concentrator Section 10 Existing No 933911 6818 0.04 na (Stack Test) March 2011 Stack Test 0.12EU 042 Concentrator Section 11 Existing No 804987 5956 0.04 na (Stack Test) March 2011 Stack Test 0.10EU 044 Concentrator Section 101 Existing No 898146 6123 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 045 Concentrator Section 102 Existing No 908269 6766 0.16 na (Stack Test) March 2011 Stack Test 0.54EU 046 Concentrator Section 103 Existing No 916311 6609 0.04 na (Stack Test) March 2011 Stack Test 0.12EU 047 Concentrator Section 104 Existing No 934235 6512 0.04 na (Stack Test) March 2011 Stack Test 0.11EU 048 Concentrator Section 105 Existing No 945877 6659 0.08 na (Stack Test) March 2011 Stack Test 0.25EU 049 Concentrator Section 106 Existing No 971041 6851 0.08 na (Stack Test) March 2011 Stack Test 0.26EU 050 Concentrator Section 107 Existing No 915923 6903 0.08 na (Stack Test) March 2011 Stack Test 0.26EU 051 Concentrator Section 108 Existing No 1006523 6998 0.08 na (Stack Test) March 2011 Stack Test 0.27EU 052 Concentrator Section 109 Existing No 922428 6865 0.09 na (Stack Test) March 2011 Stack Test 0.31EU 053 Concentrator Section 110 Existing No 918660 6690 0.08 na (Stack Test) March 2011 Stack Test 0.25EU 097 Hearth Layer Existing No 290131 7611 0.16 na (Stack Test) 9 2009 Stack Test 0.61EU 100 Fce 11 - Hood Exhaust Existing No 1813320 7611 8.1 na (Stack Test) 2 2011 Stack Test 30.82EU 104 Fce 11 - Waste Gas Existing No 1813320 7611 6.6 na (Stack Test) 2 2011 Stack Test 25.12EU 110 Fce 12 - Hood Exhaust Existing No 1813320 7782 3.8 na (Stack Test) 2 2008 Stack Test 14.79EU 114 Fce 12 - Waste Gas Existing No 1813320 7782 1.2 na (Stack Test) 2 2008 Stack Test 4.67EU 120 Fce 11 Discharge Existing No 1813320 7611 1.4 na (Stack Test) 6 2006 Stack Test 5.33EU 121 Fce 12 Discharge Existing No 1813320 7782 0.5 na (Stack Test) 12 2009 Stack Test 1.95EU 122 Fce 11 Screening Existing No 1813320 7611 0.7 na (Stack Test) 12 2009 Stack Test 2.66EU 123 Screenhouse - North Existing No 1813320 7611 0.7 na (Stack Test) 12 2009 Stack Test 2.66EU 124 Fce 12 Screening Existing No 1813320 7782 0.7 na (Stack Test) 12 2009 Stack Test 2.72EU 125 Screenhouse - South Existing No 1813320 7782 0.7 na (Stack Test) 12 2009 Stack Test 2.72EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 867240 7523 1.9 na (Stack Test) November 2011 Stack Test 7.15EU 265 Furnace 6 Discharge Existing No 867240 7523 1.4 na (Stack Test) June 2006 Stack Test 5.27EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 867240 7541 4.2 na (Stack Test) August 2008 Stack Test 15.84EU 635 Furnace 5 Discharge Existing No 867240 7541 0.36 na (Stack Test) January 2011 Stack Test 1.36EU 636 60A to 60B Transfer and 5x12 Screen Existing No 0 7181 0.1 90% (lb/ton) (AP-42) w/90% control 0.00FS 010a Conveyor 60A to 40 Existing No 3626640 7782 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.41FS 011a Cconveyor 40 to cooling pile Existing No 1087992 7782 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.42FS 011b Conveyor 41 to 42 Existing No 3626640 7782 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.41FS 012a Wind erosion from cooling pile Existing No 1.2 8760 1889.4 90% (lb/acre) - assume 60% max pile size as annual avg. 0.11FS 013a 160 to 161 Existing No 3626640 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.71FS 013b 161 to 62/162 Existing No 3626640 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.71FS 013c 62/162 to 63/163 Existing No 3626640 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.71FS 013d 63/163 to Bridge Existing No 2719980 7611 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.53FS 013e Bridge to stockpile Existing No 2719980 7611 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.06EU 637 60B to 61 New Yes 1734480 7523 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.68EU 638 61 to I New Yes 1734480 7523 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.68EU 639 I to J New Yes 1300860 7523 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.51FS 013f J to stockpile New No 1300860 7523 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.54FS 014 Pellet Handling - Boatloading Existing No 5629176 1000 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.20FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21 8760 1889.4 90% (lb/acre) - assume 60% max pile size as annual avg. 2.00FS 016a FEL Reclaim Existing No 2719980 2500 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.30FS 016b FEL Reclaim to Conveyor Existing No 2719980 2500 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.30FS 016c Conveyor to Conveyor Existing No 2719980 2500 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.30FS 016d Conveyor to 67 Existing No 2719980 2500 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 5.30FS 016e 67 to 62/162 Existing No 2719980 2500 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.06FS 016f 62/162 to 63/163 Existing No 2719980 2500 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.06FS 016g 63/163 to bins Existing No 3626640 2500 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.41FS 016h FEL Reclaim to Conveyor New No 1300860 1900 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.54EU 640 Conveyor to 62/162 New Yes 1300860 1900 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.51FS 016k 62/162 to 63/163 Existing No 1300860 1900 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.51FS 016l 63/163 to bins Existing No 1734480 1900 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.68FS 017 Pellet Screening - Yard Existing No 2010420 2800 0.071 90% (lb/ton) (AP-42) 7.14

15

Northshore Mining

PM-2.5 Projected Actual Emissions


Existing Unit

NSPSNew




Emissionstons/yr hrs/yr lb PM2.5/hr % ton PM2.5/yr

EU 007 Car Dump E Existing No 8445750 5270 0.0402 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.11EU 008 Car Dump W Existing No 8445750 5270 0.2948 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.78EU 009 FC Bins W Existing No 8446598 4986 0.0750 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.19EU 010 FC Bins E Existing No 8444902 5270 0.0777 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.20EU 012 Crusher Line 3 Existing No 2905954 4939 0.0000 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.00EU 013 Crusher Line 2 Existing No 2768544 4946 0.0161 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04EU 014 Crusher Line 1 Existing No 2772100 4986 0.0241 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 015 FC Conveyors W Existing No 8446598 4986 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.05EU 016 FC Conveyors E Existing No 8444902 5270 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.05EU 017 Crusher Line 101 Existing No 2506413 4679 0.0099 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.02EU 018 Crusher Line 102 Existing No 3150576 5270 0.0088 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.02EU 019 Crusher Line 103 Existing No 2787914 5181 0.0054 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01EU 021 Dry Cob Existing No 3378300 5270 0.2064 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.54EU 022 Dry Cob Existing No 3378300 5270 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 023 Dry Cob Existing No 3378300 5270 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 024 Dry Cob Existing No 3378300 5270 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06EU 025 Dry Cob Existing No 3378300 5270 0.2064 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.54EU 026 Tails Belts Existing No 2533725 7127 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 027 Tails Belts Existing No 2533725 7127 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 028 Tails Belts Existing No 2533725 7127 0.0023 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01EU 029 Tails Belts Existing No 2533725 7127 0.0027 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01EU 030 Conc Transfer Bin W Existing No 7178887 5270 0.0107 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 031 Conc Transfer Bin E Existing No 7178887 5270 0.0105 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 036 Concentrator Section 5 Existing No 126010 1045 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.00EU 037 Concentrator Section 6 Existing No 725794 5873 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 038 Concentrator Section 7 Existing No 862841 6444 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 039 Concentrator Section 8 Existing No 989702 7127 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 040 Concentrator Section 9 Existing No 825339 6203 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 041 Concentrator Section 10 Existing No 933911 6818 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 042 Concentrator Section 11 Existing No 804987 5956 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 044 Concentrator Section 101 Existing No 898146 6123 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 045 Concentrator Section 102 Existing No 908269 6766 0.0429 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.15EU 046 Concentrator Section 103 Existing No 916311 6609 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 047 Concentrator Section 104 Existing No 934235 6512 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03EU 048 Concentrator Section 105 Existing No 945877 6659 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 049 Concentrator Section 106 Existing No 971041 6851 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 050 Concentrator Section 107 Existing No 915923 6903 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 051 Concentrator Section 108 Existing No 1006523 6998 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 052 Concentrator Section 109 Existing No 922428 6865 0.0241 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08EU 053 Concentrator Section 110 Existing No 918660 6690 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07EU 097 Hearth Layer Existing No 290131 7611 0.1304 na (Stack Test) PM 2.5 Stack Test F12, 2011 0.50EU 100 Fce 11 - Hood Exhaust Existing No 1813320 7611 6.6015 na (Stack Test) PM 2.5 Stack Test F12, 2011 25.12EU 104 Fce 11 - Waste Gas Existing No 1813320 7611 5.3790 na (Stack Test) PM 2.5 Stack Test F12, 2011 20.47EU 110 Fce 12 - Hood Exhaust Existing No 1813320 7782 3.0970 na (Stack Test) PM 2.5 Stack Test F12, 2011 12.05EU 114 Fce 12 - Waste Gas Existing No 1813320 7782 0.9780 na (Stack Test) PM 2.5 Stack Test F12, 2011 3.81EU 120 Fce 11 Discharge Existing No 1813320 7611 1.1410 na (Stack Test) PM 2.5 Stack Test F12, 2011 4.34EU 121 Fce 12 Discharge Existing No 1813320 7782 0.4075 na (Stack Test) PM 2.5 Stack Test F12, 2011 1.59EU 122 Fce 11 Screening Existing No 1813320 7611 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.17EU 123 Screenhouse - North Existing No 1813320 7611 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.17EU 124 Fce 12 Screening Existing No 1813320 7782 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.22EU 125 Screenhouse - South Existing No 1813320 7782 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.22EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 867240 7523 0.7125 na (Stack Test) PM 2.5 Stack Test F6, 2011 2.68EU 265 Furnace 6 Discharge Existing No 867240 7523 0.5250 na (Stack Test) PM 2.5 Stack Test F6, 2011 1.97EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 867240 7541 1.5750 na (Stack Test) PM 2.5 Stack Test F6, 2011 5.94EU 635 Furnace 5 Discharge Existing No 867240 7541 0.1350 na (Stack Test) PM 2.5 Stack Test F6, 2011 0.51EU 636 60A to 60B Transfer and 5x12 Screen Existing No 0 7181 0.0147 90% Ambient filter analysis 0.00FS 010a Conveyor 60A to 40 Existing No 3626640 7782 0.0006 80% Ambient filter analysis 0.21FS 011a Cconveyor 40 to cooling pile Existing No 1087992 7782 0.0006 80% Ambient filter analysis 0.06FS 011b Conveyor 41 to 42 Existing No 3626640 7782 0.0006 80% Ambient filter analysis 0.21FS 012a Wind erosion from cooling pile Existing No 1.2 8760 277.7418 90% Ambient filter analysis 0.02FS 013a 160 to 161 Existing No 3626640 7611 0.0006 90% Ambient filter analysis 0.10FS 013b 161 to 62/162 Existing No 3626640 7611 0.0006 90% Ambient filter analysis 0.10FS 013c 62/162 to 63/163 Existing No 3626640 7611 0.0006 90% Ambient filter analysis 0.10FS 013d 63/163 to Bridge Existing No 2719980 7611 0.0006 90% Ambient filter analysis 0.08FS 013e Bridge to stockpile Existing No 2719980 7611 0.0006 80% Ambient filter analysis 0.16EU 637 60B to 61 New Yes 1734480 7523 0.0006 80% Ambient filter analysis 0.10EU 638 61 to I New Yes 1734480 7523 0.0006 80% Ambient filter analysis 0.10EU 639 I to J New Yes 1300860 7523 0.0006 80% Ambient filter analysis 0.07FS 013f J to stockpile New No 1300860 7523 0.0006 0% Ambient filter analysis 0.37FS 014 Pellet Handling - Boatloading Existing No 5629176 1000 0.0006 80% Ambient filter analysis 0.32FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21.2 8760 277.7418 90% Ambient filter analysis 0.29FS 016a FEL Reclaim Existing No 2719980 2500 0.0006 0% Ambient filter analysis 0.78FS 016b FEL Reclaim to Conveyor Existing No 2719980 2500 0.0006 0% Ambient filter analysis 0.78FS 016c Conveyor to Conveyor Existing No 2719980 2500 0.0006 0% Ambient filter analysis 0.78FS 016d Conveyor to 67 Existing No 2719980 2500 0.0006 0% Ambient filter analysis 0.78FS 016e 67 to 62/162 Existing No 2719980 2500 0.0006 80% Ambient filter analysis 0.16FS 016f 62/162 to 63/163 Existing No 2719980 2500 0.0006 80% Ambient filter analysis 0.16FS 016g 63/163 to bins Existing No 3626640 2500 0.0006 80% Ambient filter analysis 0.21FS 016h FEL Reclaim to Conveyor New No 1300860 1900 0.0006 0% Ambient filter analysis 0.37EU 640 Conveyor to 62/162 New Yes 1300860 1900 0.0006 80% Ambient filter analysis 0.07FS 016k 62/162 to 63/163 Existing No 1300860 1900 0.0006 80% Ambient filter analysis 0.07FS 016l 63/163 to bins Existing No 1734480 1900 0.0006 80% Ambient filter analysis 0.10FS 017 Pellet Screening - Yard Existing No 2010420 2800 0.0104 90% Ambient filter analysis 1.05

16

Northshore Mining

SO2 Projected Actual Emissions


Runtime EFControl


Emissionstons/yr hrs/yr lb SO2/hr % ton SO2/yr

EU 100 Fce 11 - Hood Exhaust 1813320 7610.96 1.9 na (Stack Test) 2010 Stack Test 7.23EU 104 Fce 11 - Waste Gas 1813320 7610.96 1.9 na (Stack Test) 2010 Stack Test 7.23EU 110 Fce 12 - Hood Exhaust 1813320 7781.72 1.9 na (Stack Test) 2010 Stack Test 7.39EU 114 Fce 12 - Waste Gas 1813320 7781.72 1.9 na (Stack Test) 2010 Stack Test 7.39EU 262 Furnace 6 Hood Exhaust/Waste Gas 867240 7522.931429 0.42 na (Stack Test) August 2008 Stack Test 1.58EU 634 Furnace 5 Hood Exhaust/Waste Gas 867240 7541.165238 0.42 na (Stack Test) August 2008 Stack Test 1.58

NOx Projected Actual Emissions


Runtime EFControl


Emissionstons/yr hrs/yr lb NOx/hr % ton NOx/yr

EU 100 Fce 11 - Hood Exhaust 1813320 7610.96 12 na (Stack Test) July 2006 Stack Test 45.67EU 104 Fce 11 - Waste Gas 1813320 7610.96 74 na (Stack Test) July 2010 Stack Test 281.61EU 110 Fce 12 - Hood Exhaust 1813320 7781.72 12 na (Stack Test) July 2006 Stack Test 46.69EU 114 Fce 12 - Waste Gas 1813320 7781.72 74 na (Stack Test) July 2006 Stack Test 287.92EU 262 Furnace 6 Hood Exhaust/Waste Gas 867240 7522.931429 28.2 na (Stack Test) December 2005 Stack Test 106.07EU 634 Furnace 5 Hood Exhaust/Waste Gas 867240 7541.165238 28.2 na (Stack Test) December 2005 Stack Test 106.33

GHG Projected Actual Emissions


Runtime EFControl


Emissionstons/yr hrs/yr lb CO2e/ton % ton NOx/yr

EU 100 Fce 11 - Hood Exhaust 1813320 7610.96 61.91 NA 2012 GHG report for this unit 56,131EU 104 Fce 11 - Waste GasEU 110 Fce 12 - Hood Exhaust 1813320 7781.72 61.91 NA 2012 GHG report for this unit 56,131EU 114 Fce 12 - Waste GasEU 262 Furnace 6 Hood Exhaust/Waste Gas 867240 7522.931429 77.15 NA 2012 GHG report for this unit 33,455EU 634 Furnace 5 Hood Exhaust/Waste Gas 867240 7541.165238 77.15 NA 2012 GHG report for this unit 33,455

[1] EF = k x 0.0032 x (U/5)^1.3 / (M/2)^1.4 lb/tonSource = "AP-42: Compilation of Air Pollutant Emission Factors", 5th Edn., January 1995, Page 13.2.4-3k = particle size multiplier k for PM=0.74, PM10=0.35, PM2.5=0.053U = mean wind speed (mph) Source: Northshore Mining Silver Bay Meteorological Tower 01/01/2011 - 12/31/2013



17

Northshore Mining

Northshore MiningEmissions Existing Units Could Have Accommodated - Low-Silica Pellet Production Project

PM-10 Could Have Accomodated Emissions


Existing Unit

NSPSNew




Emissions

DemandGrowth Margin (CHAE - BAE)

tons/yr hrs/yr lb PM10/hr % ton PM10/yr tons/yr

EU 007 Car Dump E Existing No 8474293 5225 0.15 na (Stack Test) 3 2011 Stack Test 0.39 0.004EU 008 Car Dump W Existing No 8474293 5225 1.4 na (Stack Test) 4 2006 Stack Test 3.66 0.038EU 009 FC Bins W Existing No 8482558 5142 0.56 na (Stack Test) 4 2006 Stack Test 1.44 0.070EU 010 FC Bins E Existing No 8466028 5225 0.29 na (Stack Test) 4 2011 Stack Test 0.76 0.008EU 012 Crusher Line 3 Existing No 2761492 5015 0.06 na (Stack Test) 9 2008 Stack Test 0.15 0.005EU 013 Crusher Line 2 Existing No 2895032 5142 0.12 na (Stack Test) 7 2007 Stack Test 0.31 0.017EU 014 Crusher Line 1 Existing No 2826033 4828 0.25 na (Stack Test) 7 2007 Stack Test 0.60 0.000EU 015 FC Conveyors W Existing No 8482558 5142 0.22 na (Stack Test) 10 2005 Stack Test 0.57 0.027EU 016 FC Conveyors E Existing No 8466028 5225 0.29 na (Stack Test) 7 2010 Stack Test 0.76 0.008EU 017 Crusher Line 101 Existing No 2532858 4849 0.037 na (Stack Test) 5 2011 Stack Test 0.09 0.005EU 018 Crusher Line 102 Existing No 3109386 5225 0.033 na (Stack Test) 5 2011 Stack Test 0.09 0.001EU 019 Crusher Line 103 Existing No 2823784 5164 0.08 na (Stack Test) 9 2008 Stack Test 0.21 0.003EU 021 Dry Cob Existing No 3389717 5225 1.12 na (Stack Test) 10 2005 Stack Test 2.93 0.030EU 022 Dry Cob Existing No 3389717 5225 0.22 na (Stack Test) Estimate from Other lines 0.57 0.006EU 023 Dry Cob Existing No 3389717 5225 0.22 na (Stack Test) 12 2009 Stack Test 0.57 0.006EU 024 Dry Cob Existing No 3389717 5225 0.22 na (Stack Test) Estimate from Other lines 0.57 0.006EU 025 Dry Cob Existing No 3389717 5225 1.12 na (Stack Test) Estimate from Other lines 2.93 0.030EU 026 Tails Belts Existing No 2542288 7893 0.1 na (Stack Test) 11 2005 Stack Test 0.39 0.045EU 027 Tails Belts Existing No 2542288 7893 0.1 na (Stack Test) Estimate from Other lines 0.39 0.045EU 028 Tails Belts Existing No 2542288 7893 0.031 na (Stack Test) Estimate from Other lines 0.12 0.014EU 029 Tails Belts Existing No 2542288 7893 0.031 na (Stack Test) 7 2010 Stack Test 0.12 0.014EU 030 Conc Transfer Bin W Existing No 7203149 5225 0.08 na (Stack Test) 11 2010 Stack Test 0.21 0.002EU 031 Conc Transfer Bin E Existing No 7203149 5225 0.093 na (Stack Test) 10 2005 Stack Test 0.24 0.003EU 036 Concentrator Section 5 Existing No 809964 6785 0.16 na (Stack Test) March 2011 Stack Test 0.54 0.461EU 037 Concentrator Section 6 Existing No 1098008 7679 0.16 na (Stack Test) March 2011 Stack Test 0.61 0.153EU 038 Concentrator Section 7 Existing No 1114282 7695 0.16 na (Stack Test) March 2011 Stack Test 0.62 0.110EU 039 Concentrator Section 8 Existing No 1105702 7815 0.16 na (Stack Test) March 2011 Stack Test 0.63 0.066EU 040 Concentrator Section 9 Existing No 1024910 7728 0.16 na (Stack Test) March 2011 Stack Test 0.62 0.131EU 041 Concentrator Section 10 Existing No 1057264 7518 0.16 na (Stack Test) March 2011 Stack Test 0.60 0.066EU 042 Concentrator Section 11 Existing No 1143617 7715 0.16 na (Stack Test) March 2011 Stack Test 0.62 0.150EU 044 Concentrator Section 101 Existing No 1108908 7697 0.16 na (Stack Test) March 2011 Stack Test 0.62 0.135EU 045 Concentrator Section 102 Existing No 1042131 7601 0.16 na (Stack Test) March 2011 Stack Test 0.61 0.077EU 046 Concentrator Section 103 Existing No 1092263 7759 0.16 na (Stack Test) March 2011 Stack Test 0.62 0.102EU 047 Concentrator Section 104 Existing No 1165092 7893 0.16 na (Stack Test) March 2011 Stack Test 0.63 0.120EU 048 Concentrator Section 105 Existing No 1163236 7831 0.16 na (Stack Test) March 2011 Stack Test 0.63 0.104EU 049 Concentrator Section 106 Existing No 1138431 7657 0.16 na (Stack Test) March 2011 Stack Test 0.61 0.075EU 050 Concentrator Section 107 Existing No 1130337 7716 0.16 na (Stack Test) March 2011 Stack Test 0.62 0.075EU 051 Concentrator Section 108 Existing No 1231455 7825 0.16 na (Stack Test) March 2011 Stack Test 0.63 0.077EU 052 Concentrator Section 109 Existing No 1089938 7684 0.16 na (Stack Test) March 2011 Stack Test 0.61 0.076EU 053 Concentrator Section 110 Existing No 1111201 7887 0.16 na (Stack Test) March 2011 Stack Test 0.63 0.106EU 097 Hearth Layer Existing No 338286 7984.44 0.58 na (Stack Test) 9 2009 Stack Test 2.32 0.108EU 100 Fce 11 - Hood Exhaust Existing No 2117914 7984.44 25.8 na (Stack Test) 2 2011 Stack Test 103.00 4.818EU 104 Fce 11 - Waste Gas Existing No 2117914 7984.44 15.6 na (Stack Test) 2 2011 Stack Test 62.28 2.913EU 110 Fce 12 - Hood Exhaust Existing No 2110657 8003.232 19.8 na (Stack Test) 2 2008 Stack Test 79.23 2.193EU 114 Fce 12 - Waste Gas Existing No 2110657 8003.232 7 na (Stack Test) 2 2008 Stack Test 28.01 0.775EU 120 Fce 11 Discharge Existing No 2117914 7984.44 2 na (Stack Test) 6 2006 Stack Test 7.98 0.373EU 121 Fce 12 Discharge Existing No 2110657 8003.232 0.7 na (Stack Test) 12 2009 Stack Test 2.80 0.078EU 122 Fce 11 Screening Existing No 2117914 7984.44 0.96 na (Stack Test) 12 2009 Stack Test 3.83 0.179EU 123 Screenhouse - North Existing No 2117914 7984.44 0.96 na (Stack Test) 12 2009 Stack Test 3.83 0.179EU 124 Fce 12 Screening Existing No 2110657 8003.232 0.96 na (Stack Test) 12 2009 Stack Test 3.84 0.106EU 125 Screenhouse - South Existing No 2110657 8003.232 0.96 na (Stack Test) 12 2009 Stack Test 3.84 0.106EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 927673 7916.4 8.1 na (Stack Test) November 2011 Stack Test 32.06 2.978EU 265 Furnace 6 Discharge Existing No 927673 7916.4 2 na (Stack Test) June 2006 Stack Test 7.92 0.735EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 896356 7948.368 17.1 na (Stack Test) August 2008 Stack Test 67.96 6.412EU 635 Furnace 5 Discharge Existing No 896356 7948.368 0.53 na (Stack Test) January 2011 Stack Test 2.11 0.199EU 636 60A to 60B Transfer and 5x12 Screen Existing No 1824029 7916.4 0.085 90% (lb/ton) (AP-42) w/90% control 7.75 1.066FS 010a Conveyor 60A to 40 Existing No 6052599 8003.232 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 1.09 0.103FS 011a Cconveyor 40 to cooling pile Existing No 1815780 8003.232 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.33 0.031FS 011b Conveyor 41 to 42 Existing No 6052599 8003.232 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 1.09 0.103FS 012a Wind erosion from cooling pile Existing No 1.21 8760 944.7 90% (lb/acre) - assume 60% max pile size as annual avg. 0.06 0.000FS 013a 160 to 161 Existing No 6052599 7984.44 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.54 0.052FS 013b 161 to 62/162 Existing No 6052599 7984.44 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.54 0.052FS 013c 62/162 to 63/163 Existing No 6052599 7984.44 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.54 0.052FS 013d 63/163 to Bridge Existing No 4539449 7984.44 0.0018 90% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.41 0.162FS 013e Bridge to stockpile Existing No 4539449 7984.44 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.82 0.324EU 637 60B to 61 New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000EU 638 61 to I New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000EU 639 I to J New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000FS 013f J to stockpile New No 0 0 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000FS 014 Pellet Handling - Boatloading Existing No 6355229 1000 0.0072 80% (lb/ton) - 4 xfers at 0.0018lb/ton ea 4.58 0.433FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21.2 8760 944.7 90% (lb/acre) - assume 60% max pile size as annual avg. 1.00 0.000FS 016a FEL Reclaim Existing No 4539449 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 4.09 1.497FS 016b FEL Reclaim to Conveyor Existing No 4539449 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 4.09 1.497FS 016c Conveyor to Conveyor Existing No 4539449 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 4.09 1.497FS 016d Conveyor to 67 Existing No 4539449 4400 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 4.09 1.497FS 016e 67 to 62/162 Existing No 4539449 4400 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.82 0.299FS 016f 62/162 to 63/163 Existing No 4539449 4400 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.82 0.299FS 016g 63/163 to bins Existing No 6355229 4400 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 1.14 0.108FS 016h FEL Reclaim to Conveyor New No 0 0 0.0018 0% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000EU 640 Conveyor to 62/162 New Yes 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000FS 016k 62/162 to 63/163 Existing No 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000FS 016l 63/163 to bins Existing No 0 0 0.0018 80% (lb/ton) - 1 xfers at 0.0018lb/ton ea 0.00 0.000FS 017 Pellet Screening - Yard Existing No 2269725 2800 0.071 90% (lb/ton) (AP-42) 8.06 2.951

18

Northshore Mining

PM (TSP) Could Have Accomodated Emissions




Emissions


tons/yr hrs/yr lb PM/hr % ton PM/yr tons/yr

EU 007 Car Dump E Existing No 8474293 5225 0.15 na (Stack Test) 3 2011 Stack Test 0.39 0.004EU 008 Car Dump W Existing No 8474293 5225 1.10 na (Stack Test) 4 2006 Stack Test 2.87 0.030EU 009 FC Bins W Existing No 8482558 5142 0.28 na (Stack Test) 4 2006 Stack Test 0.72 0.035EU 010 FC Bins E Existing No 8466028 5225 0.29 na (Stack Test) 4 2011 Stack Test 0.76 0.008EU 012 Crusher Line 3 Existing No 2761492 5015 0.00 na (Stack Test) 9 2008 Stack Test 0.00 0.000EU 013 Crusher Line 2 Existing No 2895032 5142 0.06 na (Stack Test) 7 2007 Stack Test 0.15 0.009EU 014 Crusher Line 1 Existing No 2826033 4828 0.09 na (Stack Test) 7 2007 Stack Test 0.22 0.000EU 015 FC Conveyors W Existing No 8482558 5142 0.08 na (Stack Test) 10 2005 Stack Test 0.21 0.010EU 016 FC Conveyors E Existing No 8466028 5225 0.07 na (Stack Test) 7 2010 Stack Test 0.18 0.002EU 017 Crusher Line 101 Existing No 2532858 4849 0.04 na (Stack Test) 5 2011 Stack Test 0.09 0.005EU 018 Crusher Line 102 Existing No 3109386 5225 0.03 na (Stack Test) 5 2011 Stack Test 0.09 0.001EU 019 Crusher Line 103 Existing No 2823784 5164 0.02 na (Stack Test) 9 2008 Stack Test 0.05 0.001EU 021 Dry Cob Existing No 3389717 5225 0.77 na (Stack Test) 10 2005 Stack Test 2.01 0.021EU 022 Dry Cob Existing No 3389717 5225 0.08 na (Stack Test) Estimate from Other lines 0.21 0.002EU 023 Dry Cob Existing No 3389717 5225 0.08 na (Stack Test) 12 2009 Stack Test 0.21 0.002EU 024 Dry Cob Existing No 3389717 5225 0.08 na (Stack Test) Estimate from Other lines 0.21 0.002EU 025 Dry Cob Existing No 3389717 5225 0.77 na (Stack Test) Estimate from Other lines 2.01 0.021EU 026 Tails Belts Existing No 2542288 7893 0.07 na (Stack Test) 11 2005 Stack Test 0.28 0.031EU 027 Tails Belts Existing No 2542288 7893 0.07 na (Stack Test) Estimate from Other lines 0.28 0.031EU 028 Tails Belts Existing No 2542288 7893 0.01 na (Stack Test) Estimate from Other lines 0.03 0.004EU 029 Tails Belts Existing No 2542288 7893 0.01 na (Stack Test) 7 2010 Stack Test 0.04 0.004EU 030 Conc Transfer Bin W Existing No 7203149 5225 0.04 na (Stack Test) 11 2010 Stack Test 0.10 0.001EU 031 Conc Transfer Bin E Existing No 7203149 5225 0.039 na (Stack Test) 10 2005 Stack Test 0.10 0.001EU 036 Concentrator Section 5 Existing No 809964 6785 0.04 na (Stack Test) March 2011 Stack Test 0.12 0.101EU 037 Concentrator Section 6 Existing No 1098008 7679 0.04 na (Stack Test) March 2011 Stack Test 0.13 0.034EU 038 Concentrator Section 7 Existing No 1114282 7695 0.04 na (Stack Test) March 2011 Stack Test 0.13 0.024EU 039 Concentrator Section 8 Existing No 1105702 7815 0.04 na (Stack Test) March 2011 Stack Test 0.14 0.014EU 040 Concentrator Section 9 Existing No 1024910 7728 0.04 na (Stack Test) March 2011 Stack Test 0.14 0.029EU 041 Concentrator Section 10 Existing No 1057264 7518 0.04 na (Stack Test) March 2011 Stack Test 0.13 0.014EU 042 Concentrator Section 11 Existing No 1143617 7715 0.04 na (Stack Test) March 2011 Stack Test 0.14 0.033EU 044 Concentrator Section 101 Existing No 1108908 7697 0.04 na (Stack Test) March 2011 Stack Test 0.13 0.030EU 045 Concentrator Section 102 Existing No 1042131 7601 0.16 na (Stack Test) March 2011 Stack Test 0.61 0.077EU 046 Concentrator Section 103 Existing No 1092263 7759 0.04 na (Stack Test) March 2011 Stack Test 0.14 0.022EU 047 Concentrator Section 104 Existing No 1165092 7893 0.04 na (Stack Test) March 2011 Stack Test 0.14 0.026EU 048 Concentrator Section 105 Existing No 1163236 7831 0.08 na (Stack Test) March 2011 Stack Test 0.30 0.049EU 049 Concentrator Section 106 Existing No 1138431 7657 0.08 na (Stack Test) March 2011 Stack Test 0.29 0.035EU 050 Concentrator Section 107 Existing No 1130337 7716 0.08 na (Stack Test) March 2011 Stack Test 0.29 0.036EU 051 Concentrator Section 108 Existing No 1231455 7825 0.08 na (Stack Test) March 2011 Stack Test 0.30 0.036EU 052 Concentrator Section 109 Existing No 1089938 7684 0.09 na (Stack Test) March 2011 Stack Test 0.35 0.043EU 053 Concentrator Section 110 Existing No 1111201 7887 0.08 na (Stack Test) March 2011 Stack Test 0.30 0.050EU 097 Hearth Layer Existing No 338286 7984 0.16 na (Stack Test) 9 2009 Stack Test 0.64 0.030EU 100 Fce 11 - Hood Exhaust Existing No 2117914 7984 8.1 na (Stack Test) 2 2011 Stack Test 32.34 1.513EU 104 Fce 11 - Waste Gas Existing No 2117914 7984 6.6 na (Stack Test) 2 2011 Stack Test 26.35 1.232EU 110 Fce 12 - Hood Exhaust Existing No 2110657 8003 3.8 na (Stack Test) 2 2008 Stack Test 15.21 0.421EU 114 Fce 12 - Waste Gas Existing No 2110657 8003 1.2 na (Stack Test) 2 2008 Stack Test 4.80 0.133EU 120 Fce 11 Discharge Existing No 2117914 7984 1.4 na (Stack Test) 6 2006 Stack Test 5.59 0.261EU 121 Fce 12 Discharge Existing No 2110657 8003 0.5 na (Stack Test) 12 2009 Stack Test 2.00 0.055EU 122 Fce 11 Screening Existing No 2117914 7984 0.7 na (Stack Test) 12 2009 Stack Test 2.79 0.131EU 123 Screenhouse - North Existing No 2117914 7984 0.7 na (Stack Test) 12 2009 Stack Test 2.79 0.131EU 124 Fce 12 Screening Existing No 2110657 8003 0.7 na (Stack Test) 12 2009 Stack Test 2.80 0.078EU 125 Screenhouse - South Existing No 2110657 8003 0.7 na (Stack Test) 12 2009 Stack Test 2.80 0.078EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 927673 7916 1.9 na (Stack Test) November 2011 Stack Test 7.52 0.699EU 265 Furnace 6 Discharge Existing No 927673 7916 1.4 na (Stack Test) June 2006 Stack Test 5.54 0.515EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 896356 7948 4.2 na (Stack Test) August 2008 Stack Test 16.69 1.575EU 635 Furnace 5 Discharge Existing No 896356 7948 0.36 na (Stack Test) January 2011 Stack Test 1.43 0.135EU 636 60A to 60B Transfer and 5x12 Screen Existing No 1824029 7916 0.1 90% (lb/ton) (AP-42) w/90% control 9.12 1.254FS 010a Conveyor 60A to 40 Existing No 6052599 8003 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.36 0.224FS 011a Cconveyor 40 to cooling pile Existing No 1815780 8003 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.71 0.067FS 011b Conveyor 41 to 42 Existing No 6052599 8003 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.36 0.224FS 012a Wind erosion from cooling pile Existing No 1.2 8760 1889.4 90% (lb/acre) - assume 60% max pile size as annual avg. 0.11 0.000FS 013a 160 to 161 Existing No 6052599 7984 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.18 0.112FS 013b 161 to 62/162 Existing No 6052599 7984 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.18 0.112FS 013c 62/162 to 63/163 Existing No 6052599 7984 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.18 0.112FS 013d 63/163 to Bridge Existing No 4539449 7984 0.0039 90% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.89 0.351FS 013e Bridge to stockpile Existing No 4539449 7984 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.77 0.702EU 637 60B to 61 New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000EU 638 61 to I New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000EU 639 I to J New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000FS 013f J to stockpile New No 0 0 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000FS 014 Pellet Handling - Boatloading Existing No 6355229 1000 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.48 0.235FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21 8760 1889.4 90% (lb/acre) - assume 60% max pile size as annual avg. 2.00 0.000FS 016a FEL Reclaim Existing No 4539449 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 8.85 3.242FS 016b FEL Reclaim to Conveyor Existing No 4539449 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 8.85 3.242FS 016c Conveyor to Conveyor Existing No 4539449 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 8.85 3.242FS 016d Conveyor to 67 Existing No 4539449 4400 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 8.85 3.242FS 016e 67 to 62/162 Existing No 4539449 4400 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.77 0.648FS 016f 62/162 to 63/163 Existing No 4539449 4400 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 1.77 0.648FS 016g 63/163 to bins Existing No 6355229 4400 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 2.48 0.235FS 016h FEL Reclaim to Conveyor New No 0 0 0.0039 0% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000EU 640 Conveyor to 62/162 New Yes 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000FS 016k 62/162 to 63/163 Existing No 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000FS 016l 63/163 to bins Existing No 0 0 0.0039 80% (lb/ton) - 1 xfers at 0.0039lb/ton ea 0.00 0.000FS 017 Pellet Screening - Yard Existing No 2269725 2800 0.071 90% (lb/ton) (AP-42) 8.06 2.951

19

Northshore Mining

PM-2.5 Could Have Accomodated Emissions


Existing Unit

NSPSNew




Emissions


tons/yr hrs/yr lb PM2.5/hr % ton PM2.5/yr tons/yr

EU 007 Car Dump E Existing No 8474293 5225 0.0402 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.11 0.001EU 008 Car Dump W Existing No 8474293 5225 0.2948 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.77 0.008EU 009 FC Bins W Existing No 8482558 5142 0.0750 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.19 0.009EU 010 FC Bins E Existing No 8466028 5225 0.0777 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.20 0.002EU 012 Crusher Line 3 Existing No 2761492 5015 0.0000 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.00 0.000EU 013 Crusher Line 2 Existing No 2895032 5142 0.0161 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.002EU 014 Crusher Line 1 Existing No 2826033 4828 0.0241 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06 0.000EU 015 FC Conveyors W Existing No 8482558 5142 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06 0.003EU 016 FC Conveyors E Existing No 8466028 5225 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.05 0.001EU 017 Crusher Line 101 Existing No 2532858 4849 0.0099 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.02 0.001EU 018 Crusher Line 102 Existing No 3109386 5225 0.0088 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.02 0.000EU 019 Crusher Line 103 Existing No 2823784 5164 0.0054 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01 0.000EU 021 Dry Cob Existing No 3389717 5225 0.2064 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.54 0.006EU 022 Dry Cob Existing No 3389717 5225 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06 0.001EU 023 Dry Cob Existing No 3389717 5225 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06 0.001EU 024 Dry Cob Existing No 3389717 5225 0.0214 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.06 0.001EU 025 Dry Cob Existing No 3389717 5225 0.2064 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.54 0.006EU 026 Tails Belts Existing No 2542288 7893 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07 0.008EU 027 Tails Belts Existing No 2542288 7893 0.0188 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.07 0.008EU 028 Tails Belts Existing No 2542288 7893 0.0023 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01 0.001EU 029 Tails Belts Existing No 2542288 7893 0.0027 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.01 0.001EU 030 Conc Transfer Bin W Existing No 7203149 5225 0.0107 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03 0.000EU 031 Conc Transfer Bin E Existing No 7203149 5225 0.0105 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03 0.000EU 036 Concentrator Section 5 Existing No 809964 6785 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.03 0.027EU 037 Concentrator Section 6 Existing No 1098008 7679 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.009EU 038 Concentrator Section 7 Existing No 1114282 7695 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.006EU 039 Concentrator Section 8 Existing No 1105702 7815 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.004EU 040 Concentrator Section 9 Existing No 1024910 7728 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.008EU 041 Concentrator Section 10 Existing No 1057264 7518 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.004EU 042 Concentrator Section 11 Existing No 1143617 7715 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.009EU 044 Concentrator Section 101 Existing No 1108908 7697 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.008EU 045 Concentrator Section 102 Existing No 1042131 7601 0.0429 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.16 0.021EU 046 Concentrator Section 103 Existing No 1092263 7759 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.006EU 047 Concentrator Section 104 Existing No 1165092 7893 0.0094 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.04 0.007EU 048 Concentrator Section 105 Existing No 1163236 7831 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08 0.013EU 049 Concentrator Section 106 Existing No 1138431 7657 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08 0.010EU 050 Concentrator Section 107 Existing No 1130337 7716 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08 0.010EU 051 Concentrator Section 108 Existing No 1231455 7825 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08 0.010EU 052 Concentrator Section 109 Existing No 1089938 7684 0.0241 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.09 0.011EU 053 Concentrator Section 110 Existing No 1111201 7887 0.0204 na (Stack Test) PM 2.5 Stack Test Dry Cob 0.08 0.013EU 097 Hearth Layer Existing No 338286 7984 0.1304 na (Stack Test) PM 2.5 Stack Test F12, 2011 0.52 0.024EU 100 Fce 11 - Hood Exhaust Existing No 2117914 7984 6.6015 na (Stack Test) PM 2.5 Stack Test F12, 2011 26.35 1.233EU 104 Fce 11 - Waste Gas Existing No 2117914 7984 5.3790 na (Stack Test) PM 2.5 Stack Test F12, 2011 21.47 1.004EU 110 Fce 12 - Hood Exhaust Existing No 2110657 8003 3.0970 na (Stack Test) PM 2.5 Stack Test F12, 2011 12.39 0.343EU 114 Fce 12 - Waste Gas Existing No 2110657 8003 0.9780 na (Stack Test) PM 2.5 Stack Test F12, 2011 3.91 0.108EU 120 Fce 11 Discharge Existing No 2117914 7984 1.1410 na (Stack Test) PM 2.5 Stack Test F12, 2011 4.56 0.213EU 121 Fce 12 Discharge Existing No 2110657 8003 0.4075 na (Stack Test) PM 2.5 Stack Test F12, 2011 1.63 0.045EU 122 Fce 11 Screening Existing No 2117914 7984 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.28 0.107EU 123 Screenhouse - North Existing No 2117914 7984 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.28 0.107EU 124 Fce 12 Screening Existing No 2110657 8003 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.28 0.063EU 125 Screenhouse - South Existing No 2110657 8003 0.5705 na (Stack Test) PM 2.5 Stack Test F12, 2011 2.28 0.063EU 262 Furnace 6 Hood Exhaust/Waste Gas Existing No 927673 7916 0.7125 na (Stack Test) PM 2.5 Stack Test F6, 2011 2.82 0.262EU 265 Furnace 6 Discharge Existing No 927673 7916 0.5250 na (Stack Test) PM 2.5 Stack Test F6, 2011 2.08 0.193EU 634 Furnace 5 Hood Exhaust/Waste Gas Existing No 896356 7948 1.5750 na (Stack Test) PM 2.5 Stack Test F6, 2011 6.26 0.591EU 635 Furnace 5 Discharge Existing No 896356 7948 0.1350 na (Stack Test) PM 2.5 Stack Test F6, 2011 0.54 0.051EU 636 60A to 60B Transfer and 5x12 Screen Existing No 1824029 7916 0.0147 90% Ambient filter analysis 1.34 0.184FS 010a Conveyor 60A to 40 Existing No 6052599 8003 0.0006 80% Ambient filter analysis 0.35 0.033FS 011a Cconveyor 40 to cooling pile Existing No 1815780 8003 0.0006 80% Ambient filter analysis 0.10 0.010FS 011b Conveyor 41 to 42 Existing No 6052599 8003 0.0006 80% Ambient filter analysis 0.35 0.033FS 012a Wind erosion from cooling pile Existing No 1.2 8760 277.7418 90% Ambient filter analysis 0.02 0.000FS 013a 160 to 161 Existing No 6052599 7984 0.0006 90% Ambient filter analysis 0.17 0.016FS 013b 161 to 62/162 Existing No 6052599 7984 0.0006 90% Ambient filter analysis 0.17 0.016FS 013c 62/162 to 63/163 Existing No 6052599 7984 0.0006 90% Ambient filter analysis 0.17 0.016FS 013d 63/163 to Bridge Existing No 4539449 7984 0.0006 90% Ambient filter analysis 0.13 0.052FS 013e Bridge to stockpile Existing No 4539449 7984 0.0006 80% Ambient filter analysis 0.26 0.103EU 637 60B to 61 New Yes 0 0 0.0006 80% Ambient filter analysis 0.00 0.000EU 638 61 to I New Yes 0 0 0.0006 80% Ambient filter analysis 0.00 0.000EU 639 I to J New Yes 0 0 0.0006 80% Ambient filter analysis 0.00 0.000FS 013f J to stockpile New No 0 0 0.0006 0% Ambient filter analysis 0.00 0.000FS 014 Pellet Handling - Boatloading Existing No 6355229 1000 0.0006 80% Ambient filter analysis 0.36 0.035FS 015 Pellet Handling - Wind Erosion from Pile Existing No 21.2 8760 277.7418 90% Ambient filter analysis 0.29 0.000FS 016a FEL Reclaim Existing No 4539449 4400 0.0006 0% Ambient filter analysis 1.30 0.477FS 016b FEL Reclaim to Conveyor Existing No 4539449 4400 0.0006 0% Ambient filter analysis 1.30 0.477FS 016c Conveyor to Conveyor Existing No 4539449 4400 0.0006 0% Ambient filter analysis 1.30 0.477FS 016d Conveyor to 67 Existing No 4539449 4400 0.0006 0% Ambient filter analysis 1.30 0.477FS 016e 67 to 62/162 Existing No 4539449 4400 0.0006 80% Ambient filter analysis 0.26 0.095FS 016f 62/162 to 63/163 Existing No 4539449 4400 0.0006 80% Ambient filter analysis 0.26 0.095FS 016g 63/163 to bins Existing No 6355229 4400 0.0006 80% Ambient filter analysis 0.36 0.035FS 016h FEL Reclaim to Conveyor New No 0 0 0.0006 0% Ambient filter analysis 0.00 0.000EU 640 Conveyor to 62/162 New Yes 0 0 0.0006 80% Ambient filter analysis 0.00 0.000FS 016k 62/162 to 63/163 Existing No 0 0 0.0006 80% Ambient filter analysis 0.00 0.000FS 016l 63/163 to bins Existing No 0 0 0.0006 80% Ambient filter analysis 0.00 0.000FS 017 Pellet Screening - Yard Existing No 2269725 2800 0.0104 90% Ambient filter analysis 1.18 0.434

20

Northshore Mining

SO2 Could Have Accomodated Emissions


Runtime EFControl


Emissions


tons/yr hrs/yr lb SO2/hr % ton SO2/yr tons/yr

EU 100 Fce 11 - Hood Exhaust 2117913.6 7984.44 1.9 na (Stack Test) 2010 Stack Test 7.59 0.35EU 104 Fce 11 - Waste Gas 2117913.6 7984.44 1.9 na (Stack Test) 2010 Stack Test 7.59 0.35EU 110 Fce 12 - Hood Exhaust 2110656.54 8003.232 1.9 na (Stack Test) 2010 Stack Test 7.60 0.21EU 114 Fce 12 - Waste Gas 2110656.54 8003.232 1.9 na (Stack Test) 2010 Stack Test 7.60 0.21EU 262 Furnace 6 Hood Exhaust/Waste Gas 927672.973 7916.4 0.42 na (Stack Test) August 2008 Stack Test 1.66 0.15EU 634 Furnace 5 Hood Exhaust/Waste Gas 896356.207 7948.368 0.42 na (Stack Test) August 2008 Stack Test 1.67 0.16

NOx Could Have Accomodated Emissions


Runtime EFControl


Emissions


tons/yr hrs/yr lb NOx/hr % ton NOx/yr tons/yr

EU 100 Fce 11 - Hood Exhaust 2117913.6 7984.44 12 na (Stack Test) July 2006 Stack Test 47.91 2.24EU 104 Fce 11 - Waste Gas 2117913.6 7984.44 74 na (Stack Test) July 2010 Stack Test 295.42 13.82EU 110 Fce 12 - Hood Exhaust 2110656.54 8003.232 12 na (Stack Test) July 2006 Stack Test 48.02 1.33EU 114 Fce 12 - Waste Gas 2110656.54 8003.232 74 na (Stack Test) July 2006 Stack Test 296.12 8.20EU 262 Furnace 6 Hood Exhaust/Waste Gas 927672.973 7916.4 28.2 na (Stack Test) December 2005 Stack Test 111.62 10.37EU 634 Furnace 5 Hood Exhaust/Waste Gas 896356.207 7948.368 28.2 na (Stack Test) December 2005 Stack Test 112.07 10.57

GHG Could Have Accomodated Emissions


Runtime EFControl


Emissions


tons/yr hrs/yr lb CO2e/ton % ton NOx/yr tons/yr

EU 100 Fce 11 - Hood Exhaust 2117913.6 7984.44 61.91 NA 2012 GHG report for this unit 65,559 4451.03EU 104 Fce 11 - Waste GasEU 110 Fce 12 - Hood Exhaust 2110656.54 8003.232 61.91 NA 2012 GHG report for this unit 65,335 5533.04EU 114 Fce 12 - Waste GasEU 262 Furnace 6 Hood Exhaust/Waste Gas 927672.973 7916.4 77.15 NA 2012 GHG report for this unit 35,787 5815.85EU 634 Furnace 5 Hood Exhaust/Waste Gas 896356.207 7948.368 77.15 NA 2012 GHG report for this unit 34,578 3856.91

[1] EF = k x 0.0032 x (U/5)^1.3 / (M/2)^1.4 lb/tonSource = "AP-42: Compilation of Air Pollutant Emission Factors", 5th Edn., January 1995, Page 13.2.4-3k = particle size multiplier k for PM=0.74, PM10=0.35, PM2.5=0.053U = mean wind speed (mph) Source: Northshore Mining Silver Bay Meteorological Tower 01/01/2011 - 12/31/2013



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Crusher Production Data for Highest 24 Month Scenario in past 10

Highest 24-month rolling average ANNUAL production rate = 5,383,251 tons/year for alTime Frame = November 2010 through October 20122010 Line 4 Line 3

Month HoursScaleTons

AccountingAdj. Tons % Hours Scale Tons

2010 January 0 0 0 401 2280672010 February 0 0 0 #DIV/0! 277 1586502010 March 0 0 0 202 1160572010 April 0 0 0 #DIV/0! 411 2325542010 May 0 0 0 444 2417492010 June 0 0 0 11 45232010 July 0 0 0 #DIV/0! 435 2350172010 August 0 0 0 393 2258732010 September 0 0 0 238 1309862010 October 0 0 0 #DIV/0! 461 2644112010 November 0 0 0 380 2437292010 December 0 0 0 391 2508352011 January 0 0 0 413 2636722011 February 0 0 0 #DIV/0! 293 1664502011 March 0 0 0 382 2199692011 April 0 0 0 #DIV/0! 435 2418192011 May 0 0 0 465 2667142011 June 0 0 0 431 2381322011 July 0 0 0 #DIV/0! 476 2671952011 August 0 0 0 422 2437202011 September 0 0 0 290 1734812011 October 0 0 0 #DIV/0! 472 2728042011 November 0 0 0 482 2643472011 December 0 0 0 423 2384372012 January 0 0 0 333 1881832012 February 0 0 0 #DIV/0! 442 2363302012 March 0 0 0 478 2469892012 April 0 0 0 #DIV/0! 421 2090002012 May 0 0 0 522 2511032012 June 0 0 0 292 1456802012 July 0 0 0 #DIV/0! 305 1412102012 August 0 0 0 229 1289092012 September 0 0 0 466 2612642012 October 0 0 0 #DIV/0! 449 2434242012 November 0 0 0 340 1958782012 December 0 0 0 296 158547

PSD 24-month Average Rate (belt scale values) 4847 2701698Demand Growth Annualized Rate 5015 2618918

years

l furnaces operating.

Line 2 Line 1

Accounting Adj. Tons % Hours Scale Tons


240134 433 242347 255169 298 187622167617 27% 303 166472 175881 24% 460 173736119842 483 278429 287511 376 285080242201 25% 366 201295 209646 30% 360 222285246711 464 257758 263049 9 201459

7529 0 0 0 274 4749238714 20% 403 222485 225985 15% 423 161903234939 297 159228 165619 389 260464143092 432 238897 260976 432 229964271539 27% 437 243346 249906 30% 413 252726242982 455 265929 265114 440 244323250975 338 190852 190958 433 269013276809 408 236315 248089 382 233152202959 23% 274 151343 184538 23% 226 130811234930 409 239129 255393 337 195748259593 26% 406 227144 243840 28% 440 273795272913 479 271777 278094 437 250464247404 460 260935 271095 458 258325279782 26% 450 240273 251591 26% 414 233219265914 386 202133 220540 417 209904213814 293 149778 184600 246 124622287655 25% 458 218839 230753 23% 442 248254271543 501 245383 252062 460 235557257280 463 236381 255061 454 225666197912 105 88689 93274 281 142027240978 24% 367 187381 191066 20% 349 167181264005 513 262710 280809 494 245912218245 29% 496 246593 257501 30% 461 220039264467 514 240025 252799 495 214725151610 322 154618 160912 296 148593147934 17% 441 217594 227955 24% 440 206606131385 440 230093 234512 442 221879262175 464 245416 246272 470 238373260279 29% 268 146849 157017 27% 474 231063210192 536 281029 301566 499 245866167587 458 229577 242667 503 240614

2851770 4854 2578090 2716922 4893 25846262761492 5142 2697878 2895032 4828 2736768

Line 101 Line 102



AccountingAdj. Tons

197549 215 113510 119516 333 177537 186930183555 25% 309 162747 171945 22% 298 157597 166504294378 421 228161 235603 437 245769 253785231506 28% 417 211634 220413 30% 411 245753 255948205594 468 232354 237123 397 225863 230499

7905 6 2929 4875 7 3391 5644164450 17% 417 208879 212165 19% 388 191045 194050270919 433 220111 228946 459 230306 239550251217 467 237829 259809 464 236040 257855259539 29% 431 229913 236111 28% 350 183972 188932243574 316 171667 171141 445 251953 251181269163 428 227696 227823 368 215556 215676244769 341 182970 192086 392 236649 248440159503 23% 304 165156 201381 23% 320 188653 230032209061 429 230273 245935 442 258117 275672293920 27% 441 227174 243872 28% 465 263674 283055256286 466 243278 248933 501 275692 282100268383 446 239445 248768 433 239301 248618244205 27% 499 251970 263839 29% 415 232590 243546229018 442 237214 258815 431 245138 267461153596 216 109544 135012 302 173289 213578261769 23% 409 191193 201602 20% 506 287904 303577241969 411 200815 206281 510 302560 310796243499 463 216527 233638 500 300173 323894149370 360 166333 174933 269 132197 139032170469 22% 191 95471 97349 20% 378 218582 222881262854 149 73564 78632 457 250350 267597229772 27% 505 250703 261793 27% 508 277675 289958226153 485 242632 255545 544 292135 307682154642 101 52536 54675 279 160234 166757216444 23% 492 248338 260163 27% 513 276360 289519226140 500 252644 257496 543 310839 316808239204 383 183641 184281 485 276906 277871247062 28% 405 201420 215366 26% 336 194465 207930263833 308 162013 173852 475 276269 296458254333 298 142795 150937 436 252615 267019

2720412 4591 2331102 2459679 5172 2930496 30918312826033 4849 2425382 2532858 5225 2984054 3109386

Line 103 Line 104

% Hours Scale TonsAccountingAdj. Tons % Hours

ScaleTons

Accounting Adj. Tons %

371 202603 213322 0 0 023% 305 164380 173671 26% 0 0 0 #DIV/0!

430 230076 237580 0 0 030% 442 221117 230290 31% 0 0 0 #DIV/0!

411 213648 218033 0 0 00 0 0 0 0 0

18% 320 170568 173251 19% 0 0 0 #DIV/0!435 248709 258692 0 0 0191 113790 124307 0 0 0

28% 397 204546 210060 23% 0 0 0 #DIV/0!361 185757 185188 0 0 0450 195245 195354 0 0 0380 171523 180069 0 0 0

24% 311 120036 146364 22% 0 0 0 #DIV/0!454 210360 224667 0 0 0

27% 357 139029 149248 23% 0 0 0 #DIV/0!420 209164 214026 0 0 0463 247638 257280 0 0 0

24% 495 264130 276572 30% 0 0 0 #DIV/0!412 227835 248582 0 0 0232 127377 156991 0 0 0

25% 473 261190 275409 25% 0 0 0 #DIV/0!432 235579 241991 0 0 0493 264362 285253 0 0 0347 191733 201646 0 0 0

21% 446 240736 245470 24% 0 0 0 #DIV/0!467 241580 258223 0 0 0

28% 479 247796 258757 25% 0 0 0 #DIV/0!433 214604 226025 0 0 0281 146320 152276 0 0 0

26% 495 259248 271592 25% 0 0 0 #DIV/0!538 288602 294144 0 0 0474 250432 251305 0 0 0

26% 476 257592 275428 27% 0 0 0 #DIV/0!465 245467 263405 0 0 0465 244021 257935 0 0 0

5084 2598934 2735931 0 05164 2770579 2823784 0 0

All Line Totals

HoursBelt Scale Tons

AccountingAdjustedTons

MonthlyAdjustmentFactor %

2050.5 1151686 1212620 105.3%1950.6 983582 1039173 105.7% 25%2349.6 1383572 1428700 103.3%2406.4 1334638 1390004 104.1% 29%2192.8 1372831 1401010 102.1%

297.1 15592 25953 166.5%2385.4 1189897 1208615 101.6% 18%2405.0 1344691 1398666 104.0%2223.7 1187506 1297256 109.2%2488.5 1378914 1416087 102.7% 28%2396.7 1363358 1359180 99.7%2408.8 1349197 1349949 100.1%2316.5 1324281 1390263 105.0%1728.3 922449 1124776 121.9% 23%2452.4 1353596 1445658 106.8%2543.9 1372635 1473528 107.4% 26%2766.8 1517089 1552351 102.3%2690.5 1483776 1541547 103.9%2749.0 1489377 1559536 104.7% 27%2510.3 1365944 1490330 109.1%1578.5 858091 1057592 123.2%2760.4 1480184 1560765 105.4% 24%2796.5 1484241 1524642 102.7%2796.0 1481546 1598626 107.9%1694.4 909162 956167 105.2%2172.1 1145681 1168212 102.0% 22%2557.1 1321105 1412120 106.9%2869.2 1451806 1516027 104.4% 28%2994.9 1455224 1532670 105.3%1572.0 807981 840872 104.1%2685.6 1349356 1413606 104.8% 23%2691.2 1432966 1460484 101.9%2741.9 1456032 1461108 100.3%2407.7 1274813 1363082 106.9% 27%2622.4 1406522 1509307 107.3%2455.4 1268169 1340478 105.7%

29440 15724945 1657654628751 14564054

Concentrator Production Data for Highest 24 Month Scenario in past 10 yea

Highest 24-month rolling average ANNUAL production rate = 5,383,251 tons/year for all furances o

Time Frame = November 2010 through October 2012

East Concentrator

2010 Section 101 Section 102

Month Hours Tons

Accounting Adjusted Tons % Hours Tons


2010 January 643 89078 88233 597 80172 794122010 February 526 77511 76777 22% 490 68021 673772010 March 646 94974 94107 661 90583 897562010 April 546 82808 82076 31% 628 91368 905602010 May 641 94842 93977 484 68496 678712010 June 32 4013 3973 15 2145 21242010 July 533 72028 71356 19% 560 77249 765282010 August 619 89013 88183 632 90078 892382010 September 590 86113 85331 444 63321 627462010 October 594 86912 86128 28% 572 79901 791812010 November 460 67878 67264 635 89473 886642010 December 198 29328 29053 536 75705 749962011 January 248 35725 35386 630 87697 868642011 February 378 54173 53649 17% 508 72020 713232011 March 621 81366 80604 575 81229 804692011 April 523 65325 64716 26% 639 90833 899872011 May 667 90972 90130 693 94694 938182011 June 514 71695 71022 704 97408 964942011 July 661 94903 94016 29% 682 92148 912872011 August 713 97827 96968 624 81517 808012011 September 416 59109 58564 373 49171 487182011 October 701 103651 102677 28% 650 89618 887762011 November 593 88230 87450 626 84574 838262011 December 382 69449 68838 485 65581 650042012 January 109 46718 45760 523 70193 687542012 February 482 72522 71857 20% 532 70907 702562012 March 615 87504 86709 622 84543 837752012 April 598 83626 82851 28% 617 81734 809772012 May 510 79493 78744 278 35586 352512012 June 334 65506 64719 337 43245 427262012 July 533 82265 81475 26% 577 75079 743582012 August 640 88596 87779 550 71173 705172012 September 598 84068 83275 594 77237 765092012 October 525 80038 79291 26% 290 38885 385222012 November 461 73140 72465 618 78035 77315

2012 December 223 58643 58086 500 63683 63079

PSD 24-mo 6009 889984 881399 6639 900125 891334Demand G 7697 1119430 1108908 7601 1052005 1042131

713 704713 704

ars

operating.

Section 103 Section 104

% Hours Tons


Accounting Adjusted Tons % Hours

683 97284 96361 619 86316 85497 44026% 507 71014 70342 26% 427 60371 59799 24% 583

654 93834 92977 731 108873 107879 72529% 636 92539 91722 28% 677 99736 98855 32% 677

678 98718 97818 658 94200 93341 5869 1222 1210 35 4807 4759 0

19% 708 98980 98057 19% 572 80664 79911 18% 482609 87377 86562 564 80670 79918 493643 95264 94399 518 73689 73020 464

27% 619 90566 89750 28% 541 77440 76741 26% 530636 92316 91481 626 89471 88662 619635 91780 90920 570 83072 82293 560595 82260 81479 679 100888 99930 706

23% 202 28712 28434 23% 341 49931 49447 26% 475428 57784 57243 522 74022 73328 634

27% 696 92333 91473 26% 635 91812 90956 21% 521674 90005 89173 309 42240 41849 596589 80448 79693 644 95222 94329 510

27% 718 99462 98533 28% 648 95512 94620 28% 642589 79206 78511 585 86221 85464 530486 64747 64150 454 65641 65036 364

23% 666 92875 92002 24% 673 98866 97937 25% 708473 66549 65961 553 77812 77124 640690 102034 101135 706 102516 101614 426558 74441 72914 534 73103 71604 475

26% 551 78270 77552 26% 288 41744 41361 22% 346440 64047 63465 517 75983 75293 555

26% 314 44893 44477 21% 628 89680 88849 31% 651519 69550 68895 677 98280 97355 555373 55236 54573 328 49436 48843 309

24% 493 71835 71145 26% 455 67843 67191 24% 613671 96135 95249 601 89436 88611 529595 86989 86168 213 29917 29635 607

25% 380 54333 53825 27% 593 83073 82298 23% 498635 85221 84434 660 87131 86326 486

531 72003 71319 555 68959 68304 656

6486 908120 899225 6391 925862 916815 65347759 1101963 1092263 7893 1175830 1165092 7831

718 706 708718 731 725

Section 105 Section 106 Section 107

Tons



Accounting Adjusted Tons

61989 61401 660 88521 87681 656 92571 9169381612 80839 26% 482 65582 64961 25% 324 48158 47702

104435 103481 539 78598 77881 678 92564 9171996627 95773 32% 655 98040 97174 28% 650 95453 9461082578 81825 629 94902 94036 693 100658 99740

0 0 43 6374 6310 0 0 066740 66117 16% 600 92841 91975 21% 367 52006 5152173531 72845 696 106402 105410 709 105646 10466170056 69420 592 90042 89224 331 49630 4918078415 77708 27% 557 80468 79742 26% 608 87030 8624593648 92801 562 80007 79284 671 96532 9565885591 84789 616 86635 85823 609 90377 89530

108740 107707 709 97475 96549 629 91264 9039871744 71050 25% 436 62752 62145 26% 513 72858 7215395580 94685 612 85607 84805 689 94891 9400271680 71012 26% 581 77933 77207 26% 706 94220 9334279990 79250 698 92634 91777 714 92062 9121071055 70388 656 90436 89587 594 77467 7674091623 90766 24% 568 80054 79305 24% 243 31832 3153573050 72408 527 71084 70460 622 79121 7842752193 51712 329 47228 46793 577 57259 56732

101004 100054 25% 703 105485 104494 24% 687 95368 9447285749 84991 599 85686 84929 663 65256 6468060517 59985 653 95123 94285 676 93793 9296769391 67968 464 68116 66719 362 33366 3268249104 48653 23% 513 75876 75180 25% 528 79687 7895680609 79877 557 80014 79287 457 68572 6795089501 88672 28% 594 88969 88144 26% 576 82923 8215578653 77913 540 77261 76534 675 98907 9797645256 44713 360 52747 52114 116 15772 1558291214 90338 24% 643 97534 96597 24% 479 66041 6540677190 76478 542 81420 80669 543 74019 7333685294 84489 589 86652 85834 598 79592 7884166399 65779 25% 396 57888 57348 25% 622 83743 8296165173 64572 660 96469 95578 450 58640 58098

87242 86413 682 96047 95135 464 60963 60384

937389 928241 6724 962309 952936 6774 907461 8988451174391 1163236 7657 1149144 1138431 7716 1140974 1130337

709 714709 714

Section 108 Section 109

% Hours Tons



514 76597 75871 636 86608 85787 73025% 383 56266 55734 26% 592 85676 84865 26% 609

717 113835 112796 677 101850 100920 63132% 690 114017 113010 37% 694 101807 100908 29% 317

624 98752 97851 531 78473 77758 4890 0 0 5 687 680 8

17% 192 28905 28636 5% 672 95065 94178 19% 530142 20009 19823 668 95178 94291 547595 88995 88187 581 78667 77953 644

26% 607 96751 95879 32% 634 88219 87423 26% 534645 100726 99815 624 85816 85039 672606 94858 93969 604 81507 80743 621584 88339 87500 538 70809 70137 578

27% 498 76257 75519 24% 404 57577 57019 23% 497572 85034 84238 676 95831 94934 566

30% 689 101199 100256 28% 657 88194 87372 27% 601655 94609 93734 664 89487 88659 654622 90250 89402 644 86580 85767 527

20% 725 83278 82499 26% 678 92435 91571 26% 587596 88554 87776 606 79317 78620 488361 53760 53265 421 56888 56363 393

23% 686 105412 104421 23% 677 92590 91720 24% 467627 71386 70755 711 94938 94098 686513 74245 73591 711 98160 97296 721514 58222 57028 331 39347 38540 187

22% 485 76611 75909 22% 512 64502 63910 21% 548708 115068 114024 460 64416 63831 656

31% 599 94543 93666 33% 497 68304 67671 26% 586648 100826 99877 562 75215 74507 565

74 11250 11115 299 38277 37818 31819% 614 89844 88981 21% 552 70374 69698 23% 514

688 96711 95819 573 78920 78192 606417 59133 58575 480 70863 70195 660

28% 609 84567 83778 24% 594 87574 86757 29% 432568 76140 75437 567 76389 75684 508

504 70911 70238 548 67618 66976 482

6867 997341 987756 6737 913960 905229 65657825 1242738 1231455 7684 1099984 1089938 7887

725 711 721725 711 730

##### ###### ##### ##### #####

Section 110 Ore Sections Tot

Belt Scale Tons

AccountingAdjustedTons % Hours

Belt Scale Tons


MonthlyAdjustment Factor % Hours

103874 102889 7745 1065751 1055642 99.1% 617989096 88253 31% 6617 929587 920787 99.1% 25% 492292316 91473 8910 1278382 1266707 99.1% 665941909 41539 23% 8552 1245012 1234011 99.1% 29% 616970428 69786 8626 1241863 1230537 99.1% 6014

967 958 251 33409 33075 99.0% 14671083 70420 17% 7625 1046586 1036822 99.1% 17% 521676413 75700 8275 1158632 1147831 99.1% 567991493 90662 8053 1146709 1136296 99.1% 540173957 73291 29% 8798 1244284 1233064 99.1% 28% 579699472 98572 8579 1229782 1218656 99.1% 614987193 86376 8373 1194595 1183402 99.1% 555578203 77460 8638 1217001 1205441 99.1% 589670038 69360 26% 6607 965681 956334 99.0% 24% 425280340 79588 9449 1334750 1322249 99.1% 589681849 81086 27% 9874 1300568 1288444 99.1% 27% 624691707 90858 10177 1345539 1333091 99.1% 632373692 73000 9327 1323725 1311300 99.1% 600483948 83163 24% 9576 1351695 1339062 99.1% 26% 615166146 65566 9491 1279667 1268432 99.1% 588053816 53320 6111 816242 808721 99.1% 417461335 60759 22% 10003 1385507 1372484 99.1% 23% 661892404 91587 9998 1284204 1272850 99.1% 617297205 96349 9720 1372001 1359924 99.1% 596325444 24923 6389 879314 861282 97.9% 405976706 76002 20% 7406 1031310 1021852 99.1% 22% 478394186 93331 9055 1290124 1278410 99.1% 558781515 80760 31% 9312 1304421 1292334 99.1% 28% 565978113 77377 9589 1338345 1325747 99.1% 553042435 41926 5200 727019 718293 98.8% 284870373 69697 24% 8979 1251489 1239467 99.0% 23% 547485678 84888 9423 1294725 1282786 99.1% 594291316 90455 9227 1266827 1254874 99.1% 535157194 56660 26% 8409 1162734 1151882 99.1% 27% 494064994 64394 9822 1309660 1297573 99.1% 5614

60340 59767 8550 1158447 1147447 99.1% 5145

910154 901531 104456 14473632 14333659 657261121842 1111201 109909 14963474 14822827 71922

10177

##### ##### ##### ##### ##### ##### #####

West Concentrator

E. Ore Sec. Tot Month Section 5 Section 6

Tons %



863011 January 0 0703307 26% February 0 0971863 March 0 0914304 30% April 0 0882047 May 0 0

20215 June 0 0735561 17% July 0 0824316 August 0 0787270 September 0 0839659 27% October 0 0895340 November 0 0806045 December 0 0841400 January 0 134 16460 16303616062 24% February 0 374 69893 69216831685 March 0 632 102629 101667855379 26% April 0 706 62370 61789858399 May 0 711 83939 83162834253 June 0 590 71920 71245845195 26% July 0 609 74821 74121802043 August 0 549 64831 64261559812 September 0 294 36379 36044946205 24% October 0 601 70791 70125812585 November 0 589 43305 42922858623 December 0 635 76084 75414558342 January 0 0 0 525 63033 61740685928 23% February 0 0 0 15% 521 64488 63897814942 March 0 0 0 418 52377 51901805687 28% April 0 0 0 0% 693 91656 90807791884 May 0 0 0 706 92681 91808419160 June 0 0 0 346 44370 43837782402 24% July 282 34101 33773 28% 461 59297 58728839278 August 617 73973 73291 530 68011 67384751061 September 628 75526 74814 617 87981 87151693695 26% October 525 66060 65443 57% 284 41384 40998761330 November 623 75695 74997 610 81580 80827

706408 December 479 57698 57150 503 70251 69584

9252703 1026 124830 123660 5764 719349 71226110496125 6785 817509 809964 7679 1108389 1098008

628 711628 711

Section 7 Section 8

Hours Tons



0 0 0 724 96019 95108 7160 0 0 18% 653 87913 87080 32% 5480 0 0 472 60891 60335 6930 0 0 0% 581 78050 77360 26% 5450 0 0 647 85495 84715 6950 0 0 0 0 0 51

40 4794 4750 19% 601 73648 72961 15% 649542 69149 68504 408 52038 51553 526556 74496 73819 528 70001 69365 649685 91464 90639 63% 651 84115 83357 28% 579585 77921 77216 636 81745 81005 408547 70389 69730 668 85859 85054 629580 76619 75891 599 75004 74292 238

21% 390 52612 52103 26% 387 54796 54266 23% 347537 69462 68812 640 89944 89102 678

32% 713 88082 87261 24% 495 68705 68064 24% 611561 57411 56879 566 75541 74842 643312 84862 84065 704 93916 93034 582

27% 323 76922 76204 27% 690 95104 94216 28% 398641 79186 78490 662 92223 91413 434311 36653 36315 448 63190 62607 371

19% 638 80862 80102 22% 679 93851 92969 25% 470638 80814 80099 670 94626 93789 568698 104090 103174 695 95734 94892 507293 57113 55942 593 77721 76127 324

24% 401 45632 45214 22% 469 66452 65843 18% 485513 67461 66848 626 96553 95676 613

29% 564 72432 71761 27% 627 96653 95758 33% 469665 83341 82557 686 103353 102380 654413 51955 51332 433 65011 64231 346

21% 648 82589 81796 23% 604 90207 89340 23% 664451 55260 54750 346 51110 50639 635663 83003 82220 574 84796 83996 521

26% 564 75449 74745 29% 492 69612 68962 26% 577643 81834 81079 586 82817 82052 443

615 82839 82052 132 19161 18979 700

6323 855060 846752 6994 980853 971248 60877695 1124177 1114282 7815 1116210 1105702 7728

713 704 678713 724 716

Section 9 Section 10 Section 11

Tons




89972 89119 0 0 0 127 16748 1658970929 70257 28% 147 20271 20079 13% 346 47167 4672093537 92682 621 87050 86255 464 65041 6444774760 74099 30% 681 98768 97895 35% 575 79130 7843195773 94899 661 93703 92848 609 84846 84072

6177 6116 55 7017 6947 0 0 083034 82259 18% 644 84911 84119 21% 475 64638 6403567576 66946 575 75555 74851 546 69999 6934685007 84235 541 78812 78097 379 51123 5065867764 67153 24% 623 91333 90509 31% 465 69949 6931853674 53189 558 83581 82825 242 37521 3718287393 86574 610 88124 87298 365 56785 5625333628 33308 538 74352 73645 652 99539 9859447254 46797 19% 409 57353 56798 22% 450 67711 6705693259 92386 686 96177 95276 379 51593 5110981132 80376 33% 477 64922 64317 27% 626 79977 7923286046 85250 687 97025 96128 686 87179 8637281720 80953 689 96819 95910 445 60236 5967057728 57189 25% 691 95034 94146 29% 714 106889 10589057598 57092 637 86133 85377 689 97654 9679649651 49193 363 49973 49513 150 20586 2039662189 61605 23% 437 59017 58463 22% 560 72592 7191069575 68960 672 97458 96596 689 85842 8508370958 70334 580 82485 81759 642 84026 8328746086 45141 337 47388 46416 258 29631 2902465227 64629 24% 574 80515 79777 22% 173 23067 2285581961 81217 636 86352 85568 662 90478 8965762694 62114 27% 604 80108 79366 29% 695 95190 9430884734 83936 696 91514 90652 653 90839 8998444806 44269 465 62260 61513 349 39456 3898289320 88462 26% 508 68252 67597 23% 338 45321 4488584562 83783 530 70854 70201 371 51677 5120067360 66725 446 60141 59573 426 56958 5642177142 76422 24% 551 74982 74282 25% 475 64411 6380957684 57152 657 87587 86779 647 81133 80384

94559 93661 512 68014 67368 464 59519 58954

817849 809950 6691 925409 916497 5845 797579 7899781034343 1024910 7518 1066689 1057264 7715 1154406 1143617

696 714696 714

Concentrate Load

Section 12 (Flux) W. Ore Sec. Tot Month Conc. Load

% Hours Tons % Hours Tons % Tons

59 3170 1567 202739 January 1761819% 55 3054 26% 1695 226279 84% February 21138

71 3678 2250 306518 March 3512436% 69 3531 28% 2383 330708 103% April 45796

65 3305 2611 359816 May 462196 212 105 13194 June 0

21% 51 2260 16% 2409 311025 68% July 061 3331 2597 334316 August 056 3083 2652 359438 September 0

25% 69 3857 29% 3002 404625 113% October 068 3941 2429 334441 November 2260 3519 2819 388550 December 2264 3647 2742 375601 January 0

27% 48 2906 24% 2355 349619 23% February 064 3628 3552 503064 March 0

24% 85 4647 25% 3628 445188 27% April 6478 4183 3853 487140 May 072 3690 3323 489472 June 914


20% 83 4419 24% 3385 439302 22% October 3584889 4837 3826 471619 November 4094196 5278 3757 513378 December 712763 3384 2330 320972 January 4741

15% 73 3745 29% 2623 345382 21% February 522578 4433 3468 475181 March 9202

38% 68 3908 33% 3653 498734 28% April 1796481 4358 4059 546462 May 3062333 1817 2352 307859 June 21039


28% 56 2848 28% 3469 469039 28% October 902578 4468 4208 548330 November 14217

65 3843 3405 452039 December 13156

812 43601 38730 52209291068 57007 45448 5921962

9999

dout Limestone Hauling

dout Total Limestone Haul Length 1 miles

% % unpaved road 35%Tons hauled per load 45 tons per loadTotal Limestone Hauled 41372.89 short tons

23%Total VMT 1839 miles

77% Total VMT - unpaved roads 644 unpaved milesAverage Speed 10 mphHours of Operation 184 hours

0%

0%

Total Limestone Hauled 55818.96 short tons7%

Total VMT 2481 miles0% Total VMT - unpaved roads 868 unpaved miles

Average Speed 10 mphHours of Operation 248 hours

9%

84%

Total Limestone Hauled 42800.26 short tons12%

Total VMT 1902 miles30% Total VMT - unpaved roads 666 unpaved miles

Average Speed 10 mphHours of Operation 190 hours

40%

18%

Pellet Plant Production Data for Highest 24 Month Scenario in past 10 years

2010 Furnace #5

Month HoursProductionTons Pell

AccountingAdj. Pell Tons % Gas (mcf) Btu S.T Bent

2010 January 0 0 0 0 0 02010 February 0 0 0 28% 0 0 02010 March 0 0 0 0 0 02010 April 0 0 0 0% 0 0 02010 May 0 0 0 0 0 02010 June 0 0 0 0 0 02010 July 0 0 0 0% 0 0 02010 August 0 0 0 1 1000000 02010 September 580 59645 61603 35458 3.55E+10 4712010 October 664 71951 70229 72% 40679 4.07E+10 6202010 November 600 68092 68437 37501 3.75E+10 5632010 December 710 79470 79814 44704 4.47E+10 6552011 January 655 74955 75343 42330 4.23E+10 5812011 February 496 55415 55849 25% 31646 3.16E+10 499

2011 March 624 70146 70763 39432 3.94E+10 5442011 April 659 71757 72328 28% 41992 4.2E+10 6462011 May 701 80574 81623 45175 4.52E+10 8092011 June 686 76841 78801 44605 4.46E+10 6652011 July 544 58316 60462 25% 35672 3.57E+10 4532011 August 602 62047 63450 41829 4.18E+10 5672011 September 392 41904 43412 27619 2.76E+10 3612011 October 679 76509 77923 23% 46331 4.63E+10 7072011 November 605 65923 66800 40930 4.09E+10 6222011 December 658 67940 62858 42670 4.27E+10 6092012 January 507 53943 47398 33984 3.4E+10 4752012 February 569 61707 74335 25% 37864 3.79E+10 5912012 March 597 65799 72540 40483 4.05E+10 6122012 April 505 53971 54794 27% 32768 3.28E+10 4182012 May 685 73128 74806 44428 4.44E+10 5782012 June 285 27688 21686 19670 1.97E+10 1922012 July 610 60024 73785 23% 39984 4E+10 5272012 August 736 75319 82996 48404 4.84E+10 6352012 September 610 64184 65615 40881 4.09E+10 4772012 October 682 69409 66932 25% 44808 4.48E+10 5522012 November 705 44606 40987 45838 4.58E+10 5272012 December 598 63881 62947 38422 3.84E+10 433

Totals 7089 713659 467534 4.68E+11Totals (S. Ton) 799298 6017.924% 14%

PSD 24-mo 7198 777531 796376Demand G 7948 870199 896356

736736

Furnace #6

% HoursProductionTons Pell

AccountingAdj. Pell Tons % Gas (mcf) Btu S.T Bent %

0 0 0 0 0 028% 178 16958 17152 18% 12225 1.22E+10 84 12%

709 74017 74684 47852 4.79E+10 5400% 686 71807 73154 42% 46613 4.66E+10 611 37%

692 73575 76575 47144 4.71E+10 6670 0 0 0 0 0

0% 606 69450 71835 29% 43369 4.34E+10 557 24%677 78716 80967 49134 4.91E+10 588380 41478 42840 26414 2.64E+10 266

72% 698 -59190 -57773 12% 51170 5.12E+10 525 27%697 77658 78052 48109 4.81E+10 524674 75394 75720 47278 4.73E+10 486673 74785 75172 47418 4.74E+10 388

24% 453 50122 50515 22% 31672 3.17E+10 354 24%

670 75175 75836 49325 4.93E+10 45928% 698 76486 77095 30% 51043 5.1E+10 570 28%

727 81929 82995 52269 5.23E+10 658618 67943 69676 44903 4.49E+10 514

24% 669 75236 78004 28% 49064 4.91E+10 517 26%651 74021 75695 48046 4.8E+10 549345 37270 38611 25762 2.58E+10 294

24% 456 47938 48824 19% 34672 3.47E+10 434 22%595 63515 64360 41917 4.19E+10 586725 44648 41309 49543 4.95E+10 675476 53482 46993 33129 3.31E+10 403

25% 523 55481 66835 25% 36498 3.65E+10 477 26%691 77913 85896 49369 4.94E+10 592

27% 595 64539 65523 26% 43168 4.32E+10 402 28%549 54050 55290 38399 3.84E+10 388313 31056 24324 22496 2.25E+10 220

23% 544 51759 63625 21% 39012 3.9E+10 328 21%733 74747 82366 52776 5.28E+10 490684 72229 73839 49692 4.97E+10 420

26% 603 59390 57270 27% 43306 4.33E+10 443 25%681 71680 65865 48322 4.83E+10 398730 75849 74740 52175 5.22E+10 393

7123 742175 508342 5.08E+11831236 4956

15%

7181 758383 7769137916 884833 927673

733733

Furnace #12

HoursProductionTons Pell

AccountingAdj. Pell Tons % Gas (mcf) Btu S.T Bent % Hours

738 189802 193583 100452 1E+11 1765 739660 163167 165036 28% 88353 8.84E+10 1557 27% 576737 189713 191422 99455 9.95E+10 1937 728690 172140 175369 28% 91946 9.19E+10 1609 30% 709700 177756 185003 92249 9.22E+10 1782 713

1 23 51 210 2.1E+08 1 24666 163660 169279 19% 92348 9.23E+10 1500 19% 691741 189998 195431 101045 1.01E+11 1804 722660 161429 166729 88397 8.84E+10 1405 675600 150543 146939 25% 79889 7.99E+10 1297 24% 680694 174596 175481 89182 8.92E+10 1627 686721 177470 178237 91086 9.11E+10 1570 628720 183492 184442 91703 9.17E+10 1743 720484 125870 126857 24% 64620 6.46E+10 1296 29% 543

679 169260 170749 85997 8.6E+10 1791 719714 178206 179625 27% 91769 9.18E+10 1823 27% 712726 190359 192837 93591 9.36E+10 2036 635689 175207 179675 86024 8.6E+10 1644 680721 187676 194582 26% 89939 8.99E+10 1907 24% 702624 156307 159842 78258 7.83E+10 1445 718464 117818 122059 61926 6.19E+10 1041 401731 186023 189460 23% 100751 1.01E+11 1742 20% 733683 170837 173111 93601 9.36E+10 1470 694716 182019 168405 96474 9.65E+10 2924 718542 126747 111368 66018 6.6E+10 1118 610295 75842 91363 21% 41456 4.15E+10 1016 24% 582573 141380 155865 77192 7.72E+10 1818 620703 180818 183575 28% 94029 9.4E+10 1629 35% 699671 171565 175502 91249 9.12E+10 902 725689 169850 133031 92465 9.25E+10 892 430352 85399 104978 23% 46933 4.69E+10 464 19% 651642 150001 165290 87000 8.7E+10 954 638694 178198 182171 90894 9.09E+10 862 683695 171435 165317 28% 90146 9.01E+10 1022 22% 637613 149951 137786 80394 8.04E+10 845 701697 167053 164611 89394 8.94E+10 887 542

7167 1768239 947170 9.47E+11 75161980427.7 12409

35%

7611 1913188 1931910 77828003 2055877 2110657 7984

731 733741 739

Furnace #11 Total all Fu

ProductionTons Pell

AccountingAdj. Pell Tons % Gas (mcf) Btu S.T Bent % Hours Tons Pell

192273 196103 96817 9.68E+10 2050 1478 382075143137 144777 26% 75219 7.52E+10 1529 25% 1414 323262184193 185853 94335 9.43E+10 1976 2174 447923180636 184024 29% 91623 9.16E+10 1957 30% 2085 424583181510 188910 91690 9.17E+10 2011 2105 432841

5167 11352 6012 6.01E+09 61 24 5190173547 179506 19% 95896 9.59E+10 2062 20% 1963 406657182225 187436 96756 9.68E+10 1876 2140 450939166064 171516 90558 9.06E+10 1638 2295 428616173844 169682 27% 92381 9.24E+10 1640 25% 2643 337148173632 174512 90226 9.02E+10 1750 2678 493978154120 154786 79495 7.95E+10 1414 2733 486454183461 184410 91751 9.18E+10 1799 2769 516693136878 137951 25% 73793 7.38E+10 1412 25% 1976 368285

182352 183956 92349 9.23E+10 1674 2691 496933180944 182384 26% 92339 9.23E+10 1775 26% 2784 507393160662 162753 82873 8.29E+10 1743 2789 513524169833 174164 87545 8.75E+10 1671 2674 489824176811 183317 26% 92413 9.24E+10 1652 26% 2636 498039177886 181909 92074 9.21E+10 1807 2594 470261

99675 103263 52514 5.25E+10 1030 1602 296667181778 185137 23% 92651 9.27E+10 1669 22% 2600 492248172740 175039 89246 8.92E+10 1689 2578 473015182185 168558 92701 9.27E+10 1688 2816 476792149512 131370 78573 7.86E+10 1258 2136 383684142487 171647 23% 74397 7.44E+10 1326 22% 1969 335517152550 168180 79879 7.99E+10 1411 2480 437642177589 180296 28% 88887 8.89E+10 1473 28% 2502 476917177914 181997 90765 9.08E+10 1676 2630 476657101820 79748 53744 5.37E+10 933 1718 330414154657 190114 22% 81721 8.17E+10 1571 23% 2157 351839154303 170030 77520 7.75E+10 1391 2749 454370168840 172604 84038 8.4E+10 1632 2670 483451155671 150115 27% 79209 7.92E+10 1369 27% 2616 455905170065 156268 85844 8.58E+10 1419 2700 436302126747 124894 66018 6.6E+10 1118 2568 433530

3247040

1832155 940595 9.41E+11 28894 50562282052013.6 16578 5662975

36% 100%Avg Hrs - 4 furnaces: 7224

1934150 1974122 29772 53832512076548 2117914 30416 5580284

281628162816

Rolling AnnualAvg Production short tons

rnaces Soda Ash U


MonthlyAdjustment Factor % Gas (mcf) Btu S.T Bent % Tons Soda

389686 102.0% 197269 1.97E+11 3815 - 446326965 101.1% 26% 175797 1.76E+11 3170 25% - 74451959 100.9% 241642 2.42E+11 4453 - 416432547 101.9% 28% 230182 2.3E+11 4177 29% - 391450488 104.1% 231083 2.31E+11 4459 - 322

11403 219.7% 6222 6.22E+09 62 - 0420620 103.4% 19% 231613 2.32E+11 4118 19% - 171463834 102.9% 246936 2.47E+11 4269 - 232442688 103.3% 240827 2.41E+11 3780 - 197329077 97.6% 27% 264119 2.64E+11 4082 27% - 252496482 100.5% 265018 2.65E+11 4463 - 265488557 100.4% 262563 2.63E+11 4125 - 421519367 100.5% 273202 2.73E+11 4511 - 148371172 100.8% 24% 201731 2.02E+11 3561 26% - 193

501305 100.9% 267103 2.67E+11 4468 - 415511432 100.8% 27% 277143 2.77E+11 4814 27% - 257520208 101.3% 273908 2.74E+11 5246 - 292502316 102.6% 263077 2.63E+11 4494 - 190516365 103.7% 26% 267088 2.67E+11 4530 25% - 300480895 102.3% 260207 2.6E+11 4368 - 84307345 103.6% 167821 1.68E+11 2726 - 161501344 101.8% 23% 274405 2.74E+11 4552 22% - 92479311 101.3% 265694 2.66E+11 4367 - 109441130 92.5% 281388 2.81E+11 5896 - 450337128 87.9% 211704 2.12E+11 3254 - 400000404181 120.5% 23% 190215 1.9E+11 3411 24% - 484598482481 110.2% 246923 2.47E+11 4433 - 724670484188 101.5% 28% 258852 2.59E+11 3922 30% - 580000487596 102.3% 264841 2.65E+11 3544 - 689000258789 78.3% 188375 1.88E+11 2238 - 199330432503 122.9% 22% 207650 2.08E+11 2891 22% - 442015500682 110.2% 265700 2.66E+11 3470 5,296,455 605000494229 102.2% 265505 2.66E+11 3391 5,323,873 424764439634 96.4% 27% 257469 2.57E+11 3387 25% 5,383,251 479961400907 91.9% 260398 2.6E+11 3190 5,354,413 200000427192 98.5% 246009 2.46E+11 2831 5,327,951 800750

2863641 2.86E+1239961 6030088100%

54793205618246

Unloaded

Ash

30%

35%

13%

22%

29%

##### ##### ##### ##### ##### ##### ##### #####36%

21%

13%

28%

33%

21%

18% Highest 24-month rolling average ANNUAL production rate = 5,383,251 tons/year for all furaTime Frame = November 2010 through October 2012

2012 GHG Reporting Analysis

NG (scf)

NGCarbonContent NG MW

GreenTaconitePellets (mtons)

GreenTaconitePellets (stons)

GreenTaconiteCarbonContent

ProductTaconitePellets(mtons)

Line 5 510,750,000 0.74 16.74 1,001,532 1,103,999 0.0016 769,177 Line 6 471,465,000 0.74 16.74 924,491 1,019,075 0.0016 710,009 Line 11 946,832,000 0.74 16.74 2,353,801 2,594,618 0.0016 1,807,719Line 12 985,479,000 0.74 16.74 2,449,879 2,700,526 0.0016 1,881,507

ProductTaconitePellets(stons)

ProductTaconiteCarbonContent

CollectedMaterial(mtons)

CollectedMaterial(stons)

CollectedMaterialCarbonContent

MVCFactor(scf/lb-mole)

CO2(stons)

CH4(lb/scf)

N2O(lb/scf)

847,871 0.0008 232,355 256,128 0.0020 379.48 32,678 2.25E-06 2.25E-07782,650 0.0008 214,482 236,425 0.0020 379.48 30,165 2.25E-06 2.25E-07

1,992,667 0.0008 546,082 601,951 0.0020 379.48 61,627 2.25E-06 2.25E-072,074,004 0.0008 568,372 626,522 0.0020 379.48 64,142 2.25E-06 2.25E-07

CO2e(stons)

CO2e(lb/tonProduct)

32,708 77.1530,192 77.1561,682 61.9164,200 61.91


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PE

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7729

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PE

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Act

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PE

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PE

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PE

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PE

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PE

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Act

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7729

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114

PE

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Act

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PE

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Act

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PE

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Act

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PE

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104

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105

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7729

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106

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107

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108

Act

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Act

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51S

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8P

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Add

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7713

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PE

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57S

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58S

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7718

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59S

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MINNESOTA POLLUTION CONTROL AGENCYAIR QUALITY520 LAFAYETTE ROADST. PAUL, MN 55155-4194

COMPLIANCE PLAN CD-01Facility Name: Northshore Mining - Silver Bay


17 Dec, 2014 09:52Page 1 of 88

Subject Item: Total Facility

NC/CA

Type Citation Requirement

CD hdr SOURCE-SPECIFIC REQUIREMENTS1.0

CD Minn. R. 7007.0800, subp. 2 The Permittee is authorized to operate EU643, EU644, EU645, EU646, FS013f,and FS016h within 18 months after permit issuance of Permit No. 07500003-010.The units shall meet all the requirements of this permit.

2.0

CD Minn. R. 7007.0800, subp. 2 Permit Appendices: This permit contains appendices as listed in the permit Table ofContents. The Permittee shall comply with all requirements contained in theAppendices.

Modeling parameters in Appendix E: Modeling Information are included forreference only as described elsewhere in Table A.

3.0

CD Minn. R. 7007.0502 The deadline for the Permittee to comply with the applicable requirements of Minn.R. 7007.0502 is December 30, 2018. The Permittee shall submit a MercuryReduction Plan by December 30, 2018, for approval and inclusion in a permit orother enforceable document. The units listed in GP001 and GP014 are subject tothis requirement.

4.0

CD Minn. Stat. Section 116.07, subd.4a; Minn. R. 7007.0100; Minn. R.7007.0800, subp. 2; Minn. R.7011.0150; Minn. R. 7009.0020

Comply with the Fugitive Control Plan for the Silver Bay Facility: Follow the actionsand recordkeeping specified in the plan. The plan may be amended with theCommissioner's approval. If the Commissioner determines the Permittee is out ofcompliance with Minn. R. 7011.0150, or the fugitive control plan, then the Permitteemay be required to amend the fugitive control plan. Note that the required fugitivedust control actions during Mile Post 7 tailings basin area operations, found inAppendix B of this permit, are a special set of requirements for this permit, which isexcluded from the fugitive control plan for the Silver Bay Facility.

5.0

CD Minn. R. ch. 4410 EIS Required. The Permittee is prohibited from initiating construction of anyproposed commercial scale ITmk3 plant at the Silver Bay facility and the PeterMitchell mine until an Environmental Impact Statement (EIS) under Minn. R.chapter 4410 has been prepared for the proposed commercial scale ITmk3 plant,the EIS process under Minn. R. chapter 4410 has been completed and anyapplicable regulatory permitting process has been completed in regard toconstruction initiation.

6.0

CD Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000;Minn. Stat. Section 116.07, subds.4a & 9; Minn. R. 7007.0100, subp.7(A), 7(L), & 7(M); Minn. R.7007.0800, subps. 1, 2 & 4; Minn.R. 7009.0010-7009.0080

The parameters used in modeling for permit number 07500003-003 are listed inAppendix E of this permit. The parameters describe the operation of the facility atmaximum permitted capacity.

For any changes that affect any modeled parameter or emission rate documentedin Appendix E, or are an addition to information documented in Appendix E, aRemodeling Submittal requirement is triggered. This includes changes that do notrequire a permit amendment as well as changes that require any type of permitamendment.

7.0

CD Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000

The parameters used in CO modeling for permit number 07500003-009 are listed inAppendix G of this permit. The parameters describe the operation of the facility atmaximum permitted capacity. The purpose of listing the parameters in the appendixis to provide a benchmark for future changes.

8.0


Remodeling Submittal: The Permittee must submit to the MPCA for approval anyrevisions of these parameters and must wait for a written approval before makingsuch changes (see introduction for Table B of this permit for MPCA mailinginformation). For changes that don't require a moderate or major amendment,written approval of the modeling may be given before permit issuance; however,the approval applies only to the modeling and not to any other changes. Theinformation submitted must include, for stack and vent sources, source emissionrate, location, height, diameters, exit velocity, exit temperature, discharge direction,use of rain caps or rain hats, and, if applicable, locations and dimensions of nearbybuildings. For non-stack/vent sources, this includes the source emission rate,location, size and shape, release height, and, if applicable, any emission ratescalars, and the initial lateral dimensions and initial vertical dimensions andadjacent building heights.

9.0




17 Dec, 2014 09:52Page 2 of 88


The plume dispersion characteristics due to the revisions of the information mustbe equivalent to or better than the dispersion characteristics modeled in the mostrecent air quality impacts analysis. The Permittee shall demonstrate thisequivalency in the proposal. If the information does not demonstrate equivalent orbetter dispersion characteristics, or if a conclusion cannot readily be made aboutthe dispersion, the Permittee must submit full remodeling.

For changes that do not require a permit amendment or require a minor permitamendment, the proposal must be submitted as soon as practicable, but no lessthan 60 days before beginning actual construction on the stack or associatedemission unit.

For changes that require a permit amendment other than a minor amendment,the proposal must be submitted with the permit application.

10.0

CD Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000;Minn. Stat. Section 116.07, subds.4a & 9; Minn. R. 7009.0020; Minn.R. 7011.0150; Minn. R.7007.0100; Minn. R. 7007.0800,subps. 2 & 4

For any future re-modeling (or new modeling) subject to 40 CFR Section 52.21(Prevention of Significant Deterioration, PSD) or Minn. R. ch. 7009 (MinnesotaAmbient Air Quality Standards), the Permittee shall follow all applicable rules orregulations.

11.0

CD 40 CFR 63.7480 to 63.7585;Tables to Subpart DDDDD of 40CFR 63; 40 CFR 63, subp. A;Minn. R. 7011.7000

Comply with Subpart DDDDD - National Emission Standards for Hazardous AirPollutants: Industrial, Commercial, and Institutional Boilers and Process Heaters:a. Submit an Initial Notification not later than May 31, 2013 or within 120 calendar days after a boiler or process heater becomes subject to Subpart DDDDD, whichever is later.b. For an existing affected source, comply with applicable requirements no later than, January 31, 2016;c. For a new affected source with an initial startup date on or before January 31,2016, comply with applicable requirements by January 31, 2016;d. For a new affected source with an initial startup date after January 31, 2016, comply with requirements upon initial startup.Also comply with applicable requirements of 40 CFR 63, General Provisions.

12.0

CD Minn. R. 7007.0800, subp. 2 With respect to fibers, the air quality standards at or beyond the property line of theSilver Bay facility to which the Permittee shall adhere, consistent with thedetermination of the Minnesota Supreme Court, are:

a. Fibers in the ambient air shall be below a medically significant level;b. The ambient air shall contain no more fibers than that level ordinarily found in the ambient air of a control city such as St. Paul;c. The fibers in the ambient air shall be maintained below a level which is injurious to human health or welfare in violation of Minn. Stat. Sec. 116.06 (3); andd. Such other standards which now or in the future may be applied to the Permittee's fiber emissions.

The MPCA recognizes that the above fiber level standards or measurementsapplicable to fiber emissions emanating from the Permittee's operations are to bedetermined in the future to a degree which approaches reliable scientific andmedical precision.

13.0

CD Minn. R. 7007.0800, subp. 2 The control city standard set forth in paragraph (b) was found by the federal courtsto be based on a reasonable medical theory. Any future fiber level standardsapplied pursuant to paragraphs (a), (c) and (d) must likewise be based on areasonable medical theory.

"Fibers," for the purpose of this permit, are defined as chrysotile and amphibolemineral particles with 3-to-1 or greater aspect ratios.

14.0

CD Minn. R. 7007.0800, subps. 4(D),14, & 16(J)

Daily Visible Emission Checklists for the O&M Plan: All stacks equipped with drycontrol equipment must appear individually in at least one of the Daily VisibleEmission Checklists. Observations and observation dates, weather conditioncodes, whether and what corrective action(s) had been taken, and observer's IDmust be included in the checklists. Appendix C provides explanations for thechecklists and an example checklist.

Note that fabric filters (baghouses) that are equipped with MPCA-approved brokenbag detectors are not subject to daily visible emission inspection.

15.0




17 Dec, 2014 09:52Page 3 of 88

CD Minn. R. 7007.0800, subps. 4(D),14, & 16(J)

Check visible emissions from GP 003 through GP 013, SV 005, SV 043, and SV097 once daily when in operation during daylight hours. Use the daily visibleemission checklists in the O&M Plan (see Appendix C for detail) as a means toindicate when appropriate corrective actions in the O&M Plan should be taken.

16.0

CD Minn. R. 7007.0800, subps. 4(D),14, & 16(J)

Daily Visible Emission Checklists for the Fugitive Control Plan at the Silver BayFacility: FS 001 through FS 017 and FS 019 must appear individually in at leastone of the Daily Visible Emission Checklists. Observations and observation dates,weather condition codes, whether and what corrective action(s) had been taken,and observer's ID must be included in the checklists. Appendix C providesexplanations for the checklists.

17.0

CD Minn. R. 7007.0800, subps. 4(D),14, & 16(J)

Observe fugitive dust sources FS 001 through FS 017 and FS 019 once dailyduring daylight hours. Use the daily visible emission checklist(s) in the fugitive dustcontrol plan (see Appendix C for detail) as a means to indicate when appropriatecorrective actions in the fugitive control plan are taken.

18.0

CD Minn. R. 7007.0800, subps. 4(D),14, & 16(J)

Visible Emissions Training: The Permittee shall (1) ensure that one plant employeeobtains an initial EPA Method 9 certification and be recertified every three years or(2) employ a similarly certified contractor. This person will train other plantemployees to perform the daily visible emission check as detailed in the O&M Planand Fugitive Control Plan.

19.0

CD Minn. R. 7007.0800, subps. 4(D) &16(J)

Ambient Air Quality Monitoring: The Permittee shall continue to operate TSP andPM-10 ambient air quality monitors at the existing sites, in accordance with theMPCA approved ambient monitoring plans and MPCA Exhibit M. The Permitteeshall continue to operate fiber ambient air monitors at Stations 1 (Beaver Bay) and7 (Silver Bay) at a monitoring frequency of one sample per 21 days, while meetingother requirements in the existing, MPCA approved ambient monitoring plans andMPCA Exhibit M.

20.0

S/A Minn. R. 7007.0800, subps. 4(D) &16(J)

Ambient Air Monitoring Report: due 45 days after end of each calendar quarterstarting 07/14/2006 to provide ambient air quality data on TSP and PM10 tocompare with ambient air quality standards. If ambient PM10 measurements aregreater than 145 micrograms/cubic meter, the Permittee shall submit, along withthe quarterly ambient air monitoring report, an analysis of such instances and adescription of any corrective action(s) taken.

21.0

CD hdr DETERMINING IF A PROJECT/MODIFICATION IS SUBJECT TO NSR22.0

CD Title I Condition: 40 CFR Section52.21(r)(6); Minn. R. 7007.3000;Minn. R. 7007.0800, subp. 2

Reasonable Possibility - Pellet Handling Modification. The Pellet HandlingModification triggers the monitoring, recordkeeping and reporting requirements asdefined in 40 CFR Section 52.21(r)(6) and detailed below. This requirement effectsEUs 007-010, 012-19, 021-031, 036-042, 044-053, 097, 100, 104, 110, 114,120-125, 262, 265, 634-636, and 643-646, and FSs: 010a, 011a-b, 012a, 013a-f,014, 015, 016a-l, and 017.

The following language may also apply to other changes at the facility where theremay be a reasonable possibility that a significant emissions increase may occur.

23.0


These requirements apply if a reasonable possibility (RP) as defined in 40 CFRSection 52.21(r)(6)(vi) exists that a proposed project, analyzed using theactual-to-projected-actual (ATPA) test (either by itself or as part of the hybrid test atSection 52.21(a)(2)(iv)(f)) and found to not be part of a major modification, mayresult in a significant emissions increase (SEI). If the ATPA test is not used for theproject, or if there is no RP that the proposed project could result in a SEI, theserequirements do not apply to that project. The Permittee is only subject to thePreconstruction Documentation requirement for a project where a RP occurs onlywithin the meaning of Section 52.21(r)(6)(vi)(b).

Even though a particular modification is not subject to New Source Review (NSR),or where there isn't a RP that a proposed project could result in a SEI, a permitamendment, recordkeeping, or notification may still be required by Minn. R.7007.1150 - 7007.1500.

24.0




17 Dec, 2014 09:52Page 4 of 88

CD Title I Condition: 40 CFR Section52.21(r)(6); Minn. R. 7007.3000;Minn. R. 7007.1200, subp. 4;Minn. R. 7007.0800, subps. 4 & 5

Preconstruction Documentation -- Before beginning actual construction on aproject, the Permittee shall document the following:

1. Project description2. Identification of any emission unit (EU) whose emissions of an NSR pollutantcould be affected3. Pre-change potential emissions of any affected existing EU, and the projectedpost-change potential emissions of any affected existing or new EU.4. A description of the applicability test used to determine that the project is not amajor modification for any regulated NSR pollutant, including the baseline actualemissions, the projected actual emissions, the amount of emissions excluded dueto increases not associated with the modification and that the EU could haveaccommodated during the baseline period, an explanation of why the amountswere excluded, and any creditable contemporaneous increases and decreases thatwere considered in the determination.

The Permittee shall maintain records of this documentation.

25.0

CD Title I Condition: 40 CFR Section52.21(r)(6); Minn. R. 7007.3000;Minn. R. 7007.0800, subps. 4 & 5

The Permittee shall monitor the actual emissions of any regulated NSR pollutantthat could increase as a result of the project and that were analyzed using theATPA test, and the potential emissions of any regulated NSR pollutant that couldincrease as a result of the project and that were analyzed using potential emissionsin the hybrid test. The Permittee shall calculate and maintain a record of the sum ofthe actual and potential (if the hybrid test was used in the analysis) emissions of theregulated pollutant, in tons per year on a calendar year basis, for a period of 5years following resumption of regular operations after the change, or for a period of10 years following resumption of regular operations after the change if the projectincreases the design capacity of or potential to emit of any unit associated with theproject.

26.0

CD Title I Condition: 40 CFR Section52.21(r)(6); Minn. R. 7007.3000;Minn. R. 7007.0800, subps. 4 & 5

The Permittee must submit a report to the Agency if the annual summed (actual,plus potential if used in hybrid test) emissions differ from the preconstructionprojection and exceed the baseline actual emissions by a significant amount aslisted at 40 CFR Section 52.21(b)(23). Such report shall be submitted to theAgency within 60 days after the end of the year in which the exceedances occur.The report shall contain:

a. The name and ID number of the facility, and the name and telephone number ofthe facility contact personb. The annual emissions (actual, plus potential if any part of the project wasanalyzed using the hybrid test) for each pollutant for which the preconstructionprojection and significant emissions increase are exceeded.c. Any other information, such as an explanation as to why the summed emissionsdiffer from the preconstruction projection.

27.0

CD hdr OPERATIONAL REQUIREMENTS28.0

CD Minn. Stat. Section 116.07, subds.4a & 9; Minn. R. 7007.0100, subp.7(A), 7(L), & 7(M); Minn. R.7007.0800, subps. 1, 2 & 4; Minn.R. 7009.0010-7009.0080

The Permittee shall comply with National Primary and Secondary Ambient AirQuality Standards, 40 CFR pt. 50, and the Minnesota Ambient Air QualityStandards, Minn. R. 7009.0010 to 7009.0080. Compliance shall be demonstratedupon written request by the MPCA.

29.0

CD Minn. R. 7011.0020 Circumvention: Do not install or use a device or means that conceals or dilutesemissions, which would otherwise violate a federal or state air pollution control rule,without reducing the total amount of pollutant emitted.

30.0

CD Minn. R. 7007.0800, subp. 2;Minn. R. 7007.0800, subp. 16(J)

Air Pollution Control Equipment: Operate all pollution control equipment wheneverthe corresponding process equipment and emission units are operated.

31.0

CD Minn. R. 7007.0800 subps. 14 and16(J)

Operation and Maintenance Plan: Retain at the stationary source an operation andmaintenance plan for all air pollution control equipment. At a minimum, the O & Mplan shall identify all air pollution control equipment and control practices and shallinclude a preventative maintenance program for the equipment and practices, adescription of (the minimum but not necessarily the only) corrective actions to betaken to restore the equipment and practices to proper operation to meet applicablepermit conditions, a description of the employee training program for properoperation and maintenance of the control equipment and practices, and the recordskept to demonstrate plan implementation.

32.0




17 Dec, 2014 09:52Page 5 of 88

CD Minn. R. 7019.1000, subp. 4 Operation Changes: In any shutdown, breakdown, or deviation the Permittee shallimmediately take all practical steps to modify operations to reduce the emission ofany regulated air pollutant. The Commissioner may require feasible and practicalmodifications in the operation to reduce emissions of air pollutants. No emissionsunits that have an unreasonable shutdown or breakdown frequency of process orcontrol equipment shall be permitted to operate.

33.0

CD Minn. R. 7011.0150 Fugitive Emissions: Do not cause or permit the handling, use, transporting, orstorage of any material in a manner which may allow avoidable amounts ofparticulate matter to become airborne. Comply with all other requirements listed inMinn. R. 7011.0150.

34.0

CD Minn. R. 7030.0010 - 7030.0080 Noise: The Permittee shall comply with the noise standards set forth in Minn. R.7030.0010 to 7030.0080 at all times during the operation of any emission units.This is a state only requirement and is not enforceable by the EPA Administrator orcitizens under the Clean Air Act.

35.0

CD Minn. R. 7007.0800, subp. 9(A) Inspections: The Permittee shall comply with the inspection procedures andrequirements as found in Minn. R. 7007.0800, subp. 9(A).

36.0

CD Minn. R. 7007.0800, subp. 16 The Permittee shall comply with the General Conditions listed in Minn. R.7007.0800, subp. 16.

37.0

CD hdr PERFORMANCE TESTING38.0

CD Minn. R. ch. 7017 Performance Testing: Conduct all performance tests in accordance with Minn. R.ch. 7017 unless otherwise noted in Tables A, B, and/or C.

39.0

CD Minn. R. 7017.2018; Minn. R.7017.2030, subps. 1-4, Minn. R.7017.2035, subps. 1-2

Performance Test Notifications and Submittals:

Performance Tests are due as outlined in Table A of the permit.See Table B for additional testing requirements.

Performance Test Notification (written): due 30 days before each Performance TestPerformance Test Plan: due 30 days before each Performance TestPerformance Test Pre-test Meeting: due 7 days before each Performance TestPerformance Test Report: due 45 days after each Performance TestPerformance Test Report - Microfiche Copy: due 105 days after each PerformanceTest

The Notification, Test Plan, and Test Report may be submitted in an alternativeformat as allowed by Minn. R. 7017.2018.

40.0

CD Minn. R. 7017.2025, subp. 3 Limits set as a result of a performance test (conducted before or after permitissuance) apply until superseded as stated in the MPCA's Notice of Complianceletter granting preliminary approval. Preliminary approval is based on formal reviewof a subsequent performance test on the same unit as specified by Minn. R.7017.2025, subp. 3. The limit is final upon issuance of a permit amendmentincorporating the change.

41.0

CD hdr MONITORING REQUIREMENTS42.0

CD Minn. R. 7007.0800, subp. 4(D) Monitoring Equipment Calibration - The Permittee shall either:

1. Calibrate or replace required monitoring equipment every 12 months; or2. Calibrate at the frequency stated in the manufacturer's specifications.

For each monitor, the Permittee shall maintain a record of all calibrations, includingthe date conducted, and any corrective action that resulted. The Permittee shallinclude the calibration frequencies, procedures, and manufacturer's specifications(if applicable) in the Operations and Maintenance Plan. Any requirements applyingto continuous emission monitors are listed separately in this permit.

43.0

CD Minn. R. 7007.0800, subp. 4(D) Operation of Monitoring Equipment: Unless otherwise noted in Tables A, B, and/orC, monitoring a process or control equipment connected to that process is notnecessary during periods when the process is shutdown, or during checks of themonitoring systems, such as calibration checks and zero and span adjustments. Ifmonitoring records are required, they should reflect any such periods of processshutdown or checks of the monitoring system.

44.0

CD hdr RECORDKEEPING REQUIREMENTS45.0




17 Dec, 2014 09:52Page 6 of 88

CD Minn. R. 7007.0800, subp. 5(C) Recordkeeping: Retain all records at the stationary source, unless otherwisespecified within this permit, for a period of five (5) years from the date of monitoring,sample, measurement, or report. Records which must be retained at this locationinclude all calibration and maintenance records, all original recordings forcontinuous monitoring instrumentation, and copies of all reports required by thepermit. Records must conform to the requirements listed in Minn. R. 7007.0800,subp. 5(A).

46.0

CD Minn. R. 7007.0800, subp. 5(B) Recordkeeping: Maintain records describing any insignificant modifications (asrequired by Minn. R. 7007.1250, subp. 3) or changes contravening permit terms (asrequired by Minn. R. 7007.1350, subp. 2), including records of the emissionsresulting from those changes.

47.0

CD Minn. R. 7007.1200, subp. 4 If the Permittee determines that no permit amendment or notification is requiredprior to making a change, the Permittee must retain records of all calculationsrequired under Minn. R. 7007.1200. For expiring permits, these records shall bekept for a period of five years from the date the change was made or until permitreissuance, whichever is longer. The records shall be kept at the stationary sourcefor the current calendar year of operation and may be kept at the stationary sourceor office of the stationary source for all other years. The records may be maintainedin either electronic or paper format.

48.0

CD hdr CONTRACTORS49.0

CD Minn. R. 7007.0800, subps. 2, 4and 5

Contractors: The Permittee shall retain records on site of all contractors allowed onsite that include any crushers, screens and conveyors. The Permittee shall alsoretain records on site of all contractors whose operations would require an AirEmission Permit from the MPCA. The records shall include the contractor'scompany name, MPCA air emissions permit number, short description of activitiesundertaken by the contractor, estimate of emissions or materials handled and thedates the contractor was on site. The record shall be updated at least monthly.

The Permittee shall evaluate if the activities of any contractor required NSRpermitting prior to the contractor performing such activities. If a contractor has itsown permit, but it is determined that the contractor is under the common control ofthe taconite plant then the contractor's permit does not shield the taconite plant orthe contractor from the NSR & Part 70 modification regulations or enforcementactions.

50.0

CD hdr REPORTING/SUBMITTALS51.0

CD Minn. R. 7019.1000, subp. 3 Shutdown Notifications: Notify the Commissioner at least 24 hours in advance of aplanned shutdown of any control equipment or process equipment if the shutdownwould cause any increase in the emissions of any regulated air pollutant. If theowner or operator does not have advance knowledge of the shutdown, notificationshall be made to the Commissioner as soon as possible after the shutdown.However, notification is not required in the circumstances outlined in Items A, Band C of Minn. R. 7019.1000, subp. 3.

At the time of notification, the owner or operator shall inform the Commissioner ofthe cause of the shutdown and the estimated duration. The owner or operator shallnotify the Commissioner when the shutdown is over.

52.0

CD Minn. R. 7019.1000, subp. 2 Breakdown Notifications: Notify the Commissioner within 24 hours of a breakdownof more than one hour duration of any control equipment or process equipment ifthe breakdown causes any increase in the emissions of any regulated air pollutant.The 24-hour time period starts when the breakdown was discovered or reasonablyshould have been discovered by the owner or operator. However, notification is notrequired in the circumstances outlined in Items A, B and C of Minn. R. 7019.1000,subp. 2.

At the time of notification or as soon as possible thereafter, the owner or operatorshall inform the Commissioner of the cause of the breakdown and the estimatedduration. The owner or operator shall notify the Commissioner when the breakdownis over.

53.0

CD Minn. R. 7019.1000, subp. 1 Notification of Deviations Endangering Human Health or the Environment: As soonas possible after discovery, notify the Commissioner or the state duty officer, eitherorally or by facsimile, of any deviation from permit conditions which could endangerhuman health or the environment.

54.0




17 Dec, 2014 09:52Page 7 of 88

CD Minn. R. 7019.1000, subp. 1 Notification of Deviations Endangering Human Health or the Environment Report:Within 2 working days of discovery, notify the Commissioner in writing of anydeviation from permit conditions which could endanger human health or theenvironment. Include the following information in this written description:1. the cause of the deviation;2. the exact dates of the period of the deviation, if the deviation has been corrected;3. whether or not the deviation has been corrected;4. the anticipated time by which the deviation is expected to be corrected, if not yetcorrected; and5. steps taken or planned to reduce, eliminate, and prevent reoccurrence of thedeviation.

55.0

S/A Minn. R. 7007.0800, subp. 6(A)(2) Semiannual Deviations Report: due 30 days after end of each calendar half-yearstarting 07/14/2006 . The first semiannual report submitted by the Permittee shallcover the calendar half-year in which the permit is issued. The first report of eachcalendar year covers January 1 - June 30. The second report of each calendar yearcovers July 1 - December 31. If no deviations have occurred, the Permittee shallsubmit the report stating no deviations.

56.0

CD Minn. R. 7007.1150 - 7007.1500 Application for Permit Amendment: If a permit amendment is needed, submit anapplication in accordance with the requirements of Minn. R. 7007.1150 throughMinn. R. 7007.1500. Submittal dates vary, depending on the type of amendmentneeded.

57.0

S/A Minn. R. 7007.0400, subp. 2 Application for Permit Reissuance: due 180 days before expiration of ExistingPermit

58.0

CD Minn. R. 7007.1400, subp. 1(H) Extension Requests: The Permittee may apply for an Administrative Amendment toextend a deadline in a permit by no more than 120 days, provided the proposeddeadline extension meets the requirements of Minn. R. 7007.1400, subp. 1(H).Performance testing deadlines from the General Provisions of 40 CFR pt. 60 andpt. 63 are examples of deadlines for which the MPCA does not have authority togrant extensions and therefore do not meet the requirements of Minn. R.7007.1400, subp. 1(H).

59.0

S/A Minn. R. 7007.0800, subp. 6 (C) Compliance Certification: due 31 days after end of each calendar year starting07/14/2006 (for the previous calendar year). The Permittee shall submit this on aform approved by the Commissioner, both to the Commissioner and to the US EPAregional office in Chicago. This report covers all deviations experienced during thecalendar year.

60.0

CD Minn. R. 7019.3000 - 7019.3100 Emission Inventory Report: due on or before April 1 of each calendar year followingpermit issuance, to be submitted on a form approved by the Commissioner.

61.0

CD Minn. R. 7002.0005 - 7002.0095 Emission Fees: due 30 days after receipt of an MPCA bill.62.0




17 Dec, 2014 09:52Page 8 of 88

Subject Item: GP 001 Power Boilers


CE 002 Fabric Filter - High Temperature, i.e., T>250 Degrees F







NC/CA


CD 40 CFR Section 52.21(r)(2) andMinn. R. 7007.3000

The Permittee is authorized to construct the following equipment: Low NitrogenOxide Burners with Overfire Air Systems for EU 001 and EU 002. The constructionauthorization expires if construction does not commence within 18 months afterreceipt of such approval by Air Emissions Permit No. 07500003-009, if constructionis discontinued for a period of 18 months or more, or if construction is notcompleted within a reasonable time.

1.0


CD To avoid classification as anaffected source under 40 CFRSection 72.6; Minn. R. 7007.0800,subp. 2

For each unit in GP 001 to not be an affected unit subject to the requirements of theFederal Acid Rain Program, 40 CFR Section 72.6(b)(4)(i), each unit in GP 001 shallretain the cogeneration qualifying facility status, as per the Public Utility RegulatoryPolicies Act of 1978; and shall be restricted in supplying electricity to any utilitypower distribution system to, on a three-year rolling average basis:

1) less than or equal to one-third of its potential electrical output capacity; and2) less than or equal to 219,000 MWe-hrs actual electric output (on a gross basis).

3.0

CD Title I Condition: To avoidclassification as an affectedsource under 40 CFR Section63.9982; Minn. R. 7007.0800,subp. 2

For each unit in GP 001 to not be an affected unit subject to the requirements of theNational Emission Standards for Hazardous Air Pollutants for Coal and Oil-FiredElectric Utility Steam Generating Units, 40 CFR pt. 63, subp. UUUUU, each unit inGP 001 shall cogenerate both electrical and useful thermal/mechanical energy fromthe same primary energy source; and shall be restricted in supplying electricity toany utility power distribution system to, on a 12-month rolling average basis:

1) less than or equal to one third of its potential electric output capacity; and2) less than or equal to 25 megawatts electric (MWe) output.

4.0

CD Title I Condition: To avoidclassification as a majormodification under 40 CFRSection 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800,subps. 2 and 14

The Permittee shall maintain and operate the control equipment at all times thatany emission unit controlled by the equipment is in operation. The Permittee shalldocument periods of non-operation of the control equipment.

5.0

CD hdr CONTROL EQUIPMENT REQUIREMENTS6.0

CD Minn. R. 7007.0800, subp. 14 The Permittee shall operate and maintain the fabric filter in accordance with theOperation and Maintenance (O & M) Plan. The Permittee shall keep copies of theO & M Plan available onsite for use by staff and MPCA staff.

7.0

CD Title I Condition: To avoidclassification as a majormodification under 40 CFRSection 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800,subps. 2 and 14

Pressure Drop: within the prescribed range according to the manufacturer'sspecifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3based on the values recorded during the most recent MPCA-approved performancetest where compliance was demonstrated. The new range shall be implementedupon receipt of the Notice of Compliance letter granting preliminary approval. Therange is final upon issuance of a permit amendment incorporating the change. ThePermittee shall record the pressure drop at least once every 24 hours.

8.0

CD hdr MONITORING AND RECORDKEEPING REQUIREMENTS9.0




17 Dec, 2014 09:52Page 9 of 88

CD Title I Condition: To avoidclassification as an affectedsource under 40 CFR Section63.9982; To avoid classification asan affected source under 40 CFRSection 72.6; Minn. R. 7007.0800,subp. 4; Minn. R. 7007.0800,subp. 5

Data Collection: The Permittee shall maintain a continuous hard copy readout orcomputer disk file of the generation of electricity, steam use, and the sale ofelectricity from each boiler. The generation of electricity, steam use, and sale ofelectricity shall be calculated and recorded at least once every hour.

10.0


Daily Monitoring: The Permittee shall verify the operation of the monitoringequipment at least once each operating day to verify that it is working andrecording properly. The Permittee shall maintain a written or electronic record of thedaily verifications.

11.0


Monitoring Equipment: The Permittee shall install and maintain the necessarymonitoring equipment for measuring and recording generation of electricity, steamuse, and the sale of electricity. The monitoring equipment must be installed, in use,and properly maintained when the monitored boilers are in operation.

12.0

CD hdr PERFORMANCE TESTING REQUIREMENTS13.0

S/A Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000;Minn. R. 7017.2020, subp. 1

Performance Test: due 1,080 days after 07/22/2004 and every three yearsthereafter to measure PM/PM10 emissions from one stack on a rotating basis inGP 001.

14.0


Performance Test: due before 06/26/2014 and every five years thereafter tomeasure SO2 emissions from one stack on a rotating basis in GP 001.

15.0

CD hdr CONTINUOUS OPACITY MONITORING (COM)16.0

CD Minn. R. 7017.1000, subp. 1;Minn. R. 7007.0800, subp. 2

Continuous Opacity Monitoring: The Permittee shall use CM 001 for SV 001 andCM 008 for SV 002 to measure opacity.

17.0

CD Minn. R. 7007.0800, subp. 2 Continuous Operation: Except for system startups, shutdowns, breakdowns,repairs, calibration checks, and zero and span adjustments, the Permittee shalloperate CM 001 continuously when venting exhaust gas from EU 001 throughSV 001, and operate CM 008 continuously when venting exhaust gas fromEU 002 through SV 002.

18.0

CD Minn. R. 7017.1000 Daily Calibration Drift (CD) Check: The CD shall be quantified and recorded at zero(low-level) and upscale (high-level) opacity at least once daily. CM 001 and CM008 must be adjusted whenever the calibration drift exceeds twice the specificationof PS-1 of 40 CFR 60, Appendix B.

19.0

S/A Minn. R. 7019.2000 Excess Emissions/Downtime Reports (EER's): due 30 days after end of eachcalendar quarter starting 07/14/2006 . (Submit Deviations Reporting Form DRF-1as amended). The EER shall indicate all periods of monitor bypass and all periodsof exceedances of the limit including exceedances allowed by an applicablestandard, i.e. during startup, shutdown, and malfunctions.

20.0

S/A Minn. R. 7007.0800, subp. 2 COMS Calibration Error Audit: due before half-year starting 07/14/2006 . Conductthree point calibration error audits at least 3 months apart but no greater than 8months apart. Filter values used shall correspond to approximately 11%, 20%, and37% opacity.

21.0

CD Minn. R. 7007.0800, subp. 2 COMS Monitoring Data: The Permittee shall reduce all COMS data to 6-minuteaverages. Opacity averages shall be calculated from all equally spacedconsecutive 10-second (or shorter) data points in the 6-minute averaging period.

22.0

CD Minn. R. 7007.0800, subp. 5 Recordkeeping: The Permittee must retain records of all COMS monitoring dataand support information for a period of five years from the date of the monitoringsample, measurement, or report. Records shall be kept at the source.

23.0

CD hdr SO2 EMISSION MONITORING REQUIREMENTS24.0




17 Dec, 2014 09:52Page 10 of 88

CD Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000;Minn. R. 7007.0800, subp. 2


25.0


Fuel Usage & Sulfur Dioxide Emission Rate Monitoring: By the fifteenth day ofeach calendar month, the Permittee shall collect recorded fuel usage rate (U, intons) for the previous calendar month, calculate and record (at the time ofcalculation) the sulfur dioxide emission for the previous month as follows:

E = U * S * 2

where:

E = SO2 emissions in tons for the previous month,U = Tons of coal used for the previous month,S = percent by weight of sulfur in coal, based on most current supplier certification,2 = molar ratio of sulfur dioxide to sulfur

This method of Fuel Usage & sulfur Dioxide Emission Rate Monitoring may bechanged by the MPCA, upon a written notification from the Permittee that the sulfurcontent in the coal exceeded 0.50%.

26.0

S/A Minn. R. 7007.0800, subp. 4(B) Notification: due 14 days after Fuel Supplier Certification or Fuel Sulfur Analysisindicated fuel sulfur in a shipment exceeded 0.50% by weight.

27.0

S/A Minn. R. 7007.0800, subp. 6C Notification of compliance status: due 30 days after Discovery of Deviation ofApplicability status for any Emission Unit of GP 001. This one-time notification isrequired in the event that the unit has become an affected unit subject to therequirements of the federal Acid Rain Program.

28.0




17 Dec, 2014 09:52Page 11 of 88

Subject Item: GP 002 Process Boilers

Associated Items: EU 003 Process Boiler 1 - Boiler

EU 004 Process Boiler 2 - Boiler

SV 003 Process Boiler #1 & #2

NC/CA


CD hdr POLLUTANT LIMITS1.0

LIMIT Minn. R. 7011.0510, subp. 1 Total Particulate Matter: less than or equal to 0.6 lbs/million Btu heat input . Thislimit applies individually to both EU 003 and EU 004.

2.0

LIMIT Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000

PM < 10 micron: less than or equal to 0.024 lbs/million Btu heat input . This limitapplies individually to both EU 003 and EU 004.

3.0

LIMIT Minn. R. 7011.0510, subp. 1 Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when burning oil.This limit applies individually to both EU 003 and EU 004.

4.0

CD Title I Condition: 40 CFR Section52.21(k); Minn. R. 7007.3000

The Permittee shall restrict the sulfur content of any grade of commercial fuel oil sothat SO2 emission does not exceed 0.21 lb SO2/million BTU. This limit appliesindividually to both EU 003 and EU 004. This Title I Condition is more stringentthan the limit prescribed by Minn. R. 7011.0510, subp. 1 which also applies.

5.0

LIMIT Minn. R. 7011.0510, subp. 2 Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. This limit applies individually to bothEU 003 and EU 004.

6.0


CD Minn. R. 7007.0800, subp. 2 Fuel Limits: The Permittee shall combust only natural gas or distillate fuel oil in thisgroup.

8.0

S/A Minn. R. 7007.0800, subp. 2 Notification: due 30 days after Resuming Operation of Process Boilers 1 and 2.The Permittee shall do an applicability determination before resuming operation. Ifa permit action is required, the Permittee shall apply for and receive the appropriateauthorization before resuming operation.

9.0



Initial Performance Test: due 180 days after Resuming Operation to measure SO2emission from one process boiler, when it is fired with distillate fuel oil. ThePermittee shall also sample and analyze the fuel for sulfur content, heating value,and density.

11.0


Initial Performance Test: due 180 days after Resuming Operation to measure PMand PM10 emission and Opacity from either EU 003 or EU 004.

12.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after Initial Performance Test. The plan shallspecify a testing frequency for this group on a rotating basis, based on the test dataand MPCA guidance. Future performance tests based on one-year (12 months),36 months, and 60 months intervals, or as applicable, shall be required uponwritten approval of the MPCA.

13.0

CD hdr SO2 EMISSION MONITORING REQUIREMENTS14.0



15.0




17 Dec, 2014 09:52Page 12 of 88

Subject Item: GP 003 Crude Ore Rail Car Unloading







NC/CA





2.0


Total Particulate Matter: less than or equal to 0.0025 grains/dry standard cubic foot. This limit applies individually to both EU 007 and EU 008. This is more stringentthan the limit prescribed by 40 CFR Section 60.382(a)(1) which also applies.

3.0

LIMIT 40 CFR Section 60.382(a)(1);Minn. R. 7011.2700

Total Particulate Matter: less than or equal to 0.022 grains/dry standard cubic foot(0.05 grams/dry standard cubic meter). This limit applies individually to both EU007 and EU 008.

4.0


Opacity: less than or equal to 7 percent opacity . This limit applies individually toboth EU 007 and EU 008.

5.0

LIMIT 40 CFR Section 60.382(b); Minn.R. 7011.2700

Opacity: less than or equal to 10 percent opacity for any process fugitive emissions.This limit applies individually to both EU 007 and EU 008.

6.0

CD hdr POLLUTION CONTROL EQUIPMENT REQUIREMENTS7.0

CD Minn. R. 7007.0800, subps. 2 &14


8.0



Performance Test: due 1,800 days after 07/22/2004 and every five years thereafterto measure PM/PM10 emissions from one stack on a rotating basis in GP 003.

10.0

CD Minn. R. 7007.0800, subp. 2 NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS:TACONITE ORE PROCESSING (40 CFR Part 63 Subpart RRRRR, commonlyreferred to as the Taconite MACT Requirements)


11.0

LIMIT 40 CFR Section 63.9590(a);40CFR Section 63.9621(b); Minn. R.7011.8030


12.0

CD 40 CFR Section 63.9620(e); Minn.R. 7011.8030


13.0

S/A 40 CFR Section 63.9630(a); Minn.R. 7011.8030



14.0




17 Dec, 2014 09:52Page 13 of 88

CD 40 CFR Section 63.9634(d); Minn.R. 7011.8030


15.0




17 Dec, 2014 09:52Page 14 of 88

Subject Item: GP 004 Crushed Ore Storage







NC/CA





2.0



3.0

LIMIT Minn. R. 7011.0710, subp. 1(A) Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limitapplies individually to both EU 009 and EU 010.

4.0

LIMIT Minn. R. 7011.0710, subp. 1(B) Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. An exceedance of this opacitystandard occurs whenever any one-hour period contains two or more six-minuteperiods during which the average opacity exceeds 20%, or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60%. This limit applies individually to both EU 009 and EU 010.

5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0



Initial Performance Test: due before 04/15/2006 to measure PM and PM10emissions from one stack in GP 004.

9.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after 04/13/2006. The plan shall specify atesting frequency for this group on a rotating basis, based on the test data andMPCA guidance. Future performance tests based on one-year (12 months), 36months, and 60 months intervals, or as applicable, shall be required upon writtenapproval of the MPCA.

10.0



11.0



12.0



13.0




17 Dec, 2014 09:52Page 15 of 88




14.0



15.0




17 Dec, 2014 09:52Page 16 of 88

Subject Item: GP 005 Tertiary Crushing

























NC/CA



LIMIT Title I Condition: 40 CFR Sections52.21(k)&(j) (BACT); Minn. R.7007.3000


2.0

LIMIT Title I Condition: 40 CFR Sections52.21(k)&(j) (BACT); Minn. R.7007.3000


3.0

LIMIT Minn. R. 7011.0710, subp. 1(A) Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limitapplies individually to each unit in this group.

4.0

LIMIT Minn. R. 7011.0710, subp. 1(B) Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. An exceedance of this opacitystandard occurs whenever any one-hour period contains two or more six-minuteperiods during which the average opacity exceeds 20%, or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60%. This limit applies individually to each unit in this group.

5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0





17 Dec, 2014 09:52Page 17 of 88

S/A Title I Condition: 40 CFR Section52.21(k), and (j) (BACT); Minn. R.7007.3000; Minn. R. 7017.2020,subp. 1

Performance Test: due before end of each calendar year starting 07/14/2006 tomeasure PM and PM10 emissions from two stacks on a rotating basis in this group.The performance testing frequency may be relaxed from two per year to two perthree years according to the following conditions:

a. The Permittee has demonstrated three (3) consecutive years that the PM or PM10 emission limit has not been exceeded; andb. The performance test result shall not be greater than 90% of the limit.

If a subsequent performance test result is greater than 90% of the PM or PM10emission limit, then the testing frequency shall revert back to the original yearlybasis until subsequent yearly testing produces three consecutive annualperformance test results which satisfy the criteria listed above; at that time, thetesting may again be two per three years.

9.0



10.0



11.0



12.0


Performance Test: due before end of each calendar 60 months starting 12/31/2011to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(b)(1) - (3) and 40 CFR pt. 63, subp. RRRRR,Table 1 todemonstrate compliance with Taconite NESHAP ore crushing limitations.

The first performance test after initial compliance demonstration in the five calendaryear period was completed on 10/17/2012.

13.0



14.0




17 Dec, 2014 09:52Page 18 of 88

Subject Item: GP 006 Crushed Ore Conveying







NC/CA





2.0



3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0




9.0

S/A Minn. R. 7017.2020, subp. 1 Initial Performance Test: due before 12/15/2005 to measure opacity from one stackin this group.

10.0


11.0



12.0



13.0




17 Dec, 2014 09:52Page 19 of 88



14.0



The first performance test in the five calendar year period after initial compliancedemonstration is due before 12/31/2015.

15.0



16.0




17 Dec, 2014 09:52Page 20 of 88

Subject Item: GP 007 Dry Cobbing & Conveying
















NC/CA





2.0



3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0




9.0


Initial Performance Test: due before 02/15/2008 to measure PM and PM10emissions from another stack in this group.

10.0


11.0


12.0




17 Dec, 2014 09:52Page 21 of 88



13.0



14.0



15.0



The first performance test in the five calendar year after initial compliancedemonstration period was completed on 04/29/2014.

16.0



17.0




17 Dec, 2014 09:52Page 22 of 88

Subject Item: GP 008 Coarse Tails Handling









SV 026 Tails Belts

SV 027 Tails Belts

SV 028 Tails Belts

SV 029 Tails Belts

NC/CA





2.0


Total Particulate Matter: less than or equal to 0.0025 grains/dry standard cubic foot. This limit applies indidivually to each unit in this group. This is more stringent thanthe limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies.

3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0




9.0


10.0


11.0



12.0




17 Dec, 2014 09:52Page 23 of 88



13.0



14.0




15.0



16.0




17 Dec, 2014 09:52Page 24 of 88

Subject Item: GP 009 Concentrator Bins - W or E; with Cartridge Collectors







NC/CA





2.0



3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0

CD Minn. R. 7007.0800, subps. 4, 5 &14

Gas Stream Pressure Drop: Monitor and record individually for each CE at leastonce every day when in operation. The pressure drop shall be greater than or equalto 1.0 inches of water. Once the operating range is established it becomes anenforceable part of this permit. A deviation from the established range shall triggera corrective action as detailed in the O&M plan.

8.0




10.0


11.0


12.0



13.0




17 Dec, 2014 09:52Page 25 of 88



14.0



15.0




16.0



17.0




17 Dec, 2014 09:52Page 26 of 88

Subject Item: GP 010 Concentrator Bins















































17 Dec, 2014 09:52Page 27 of 88


















NC/CA



LIMIT Title I Condition: 40 CFR Section52.21(k), and (j) (BACT); Minn. R.7007.3000

PM < 10 micron: less than or equal to 0.0030 grains/dry standard cubic foot . Thislimit applies individually to each unit in this group. This limit shall apply individuallyto all operating concentrator lines after 12/31/2006. Prior to that time, up to fourconcentrators from the Group of EU 042 and EU 044-052, may be subject to adifferent limit of less than or equal to 0.063 grains/dry standard cubic foot, unlessmore than two concentrators from the group of EU 033-041 are operating.

2.0


Total Particulate Matter: less than or equal to 0.0030 grains/dry standard cubic foot. This limit applies individually to each unit in this group and is more stringent thanthe limit prescribed by Minn. R. 7011.0710, subp. 1(A) which also applies. This limitshall apply individually to all operating concentrator lines after 12/31/2006. Prior tothat time, up to four concentrators from the Group of EU 042 and EU 044-052, maybe subject to a different limit of less than or equal to 0.063 grains/dry standardcubic foot, unless more than two concentrators from the group of EU 033-041 areoperating.

3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 2 &14


7.0

CD Minn. R. 7007.0800, subps. 4, 5 &14

Gas Stream Pressure Drop: Upon installation of monitoring equipment, monitor andrecord individually for each fabric filter at least once every day when in operation.Once the operating range is established it becomes an enforceable part of thispermit. A deviation from the established range shall trigger a corrective action asdetailed in the O&M plan.

8.0




17 Dec, 2014 09:52Page 28 of 88



Initial Performance Test: due before 04/15/2006 to measure PM and PM10emissions from one stack in this group equipped with a fabric filter.

10.0


11.0


12.0



13.0



14.0



15.0


Performance Test: due before end of each calendar 60 months starting 12/31/2010to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(c)(1) - (3) and 40 CFR pt. 63, subp. RRRRR,Table 1 todemonstrate compliance with Taconite NESHAP ore crushing limitations.


16.0



17.0




17 Dec, 2014 09:52Page 29 of 88

Subject Item: GP 012 Additive Handling & Storage - West (by SV locations)
















NC/CA





2.0



3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 4, 5 &14


7.0

CD Minn. R. 7007.0800, subps. 4, 5 &14

Gas Stream Pressure Drop: Upon installation of monitoring equipment, monitor andrecord individually for each CE at least once every day when in operation. Thedifferential pressure shall be greater than or equal to 1 inches water column. Oncethe operating range is established it becomes an enforceable part of this permit. Adeviation from the established range shall trigger a corrective action as detailed inthe O&M plan. (Note these baghouses are shaker style units that do not employ acleaning cycle pulse for bag cleaning.)

8.0




10.0

S/A Minn. R. 7017.2020, subp. 1 Performance Test: due 1,800 days after 01/31/2005 and every five years thereafterto measure opacity from two stacks on a rotating basis in the pool of GP 012 andGP 013.

11.0




17 Dec, 2014 09:52Page 30 of 88

Subject Item: GP 013 Additive Handling & Storage - East (by SV locations)















EU 083 East Additive Unload - Material Handling Equipment

EU 084 East Additive Unload, Supplemental - Material Handling Equipment







SV 083 Bentonite Unloading Collector

SV 084 Supplemental Ben Unload Col

NC/CA





2.0



3.0


4.0


5.0


CD Minn. R. 7007.0800, subps. 4, 5 &14


7.0




17 Dec, 2014 09:52Page 31 of 88

CD Minn. R. 7007.0800, subps. 4, 5 &14

Gas Stream Pressure Drop: Upon installation of monitoring equipment, monitor andrecord individually for each CE at least once every day when in operation. Thedifferential pressure shall be greater than or equal to 0.1 inches water column.Once the operating range is established it becomes an enforceable part of thispermit. A deviation from the established range shall trigger a corrective action asdetailed in the O&M plan. (Note these baghouses are shaker style units that do notemploy a cleaning cycle pulse for bag cleaning.)

8.0




10.0

S/A Minn. R. 7017.2020, subp. 1 Performance Test: due 1,800 days after 01/31/2005 and every five years thereafterto measure opacity from two stacks on a rotating basis in the pool of GP 012 andGP 013.

11.0




17 Dec, 2014 09:52Page 32 of 88

Subject Item: GP 014 Pellet Indurating Furnaces




































SV 266 Fce 5 HE-WG #501;#502;#503

SV 267 Fce 5 HE-WG #501;#502;#503

SV 268 Fce 5 HE-WG #501;#502;#503









17 Dec, 2014 09:52Page 33 of 88

Associated Items: SV 275 Fce 6 HE-WG Bypass

NC/CA




PM < 10 micron: less than or equal to 0.020 grains/dry standard cubic foot for EU100 and EU 110 individually.

2.0


PM < 10 micron: less than or equal to 0.01 grains/dry standard cubic foot for EU104, EU 114, EU 262 and EU 634 individually.

3.0


PM < 10 micron: less than or equal to 0.18 lbs/million Btu heat input for EU 634individually.

4.0


Total Particulate Matter: less than or equal to 0.020 grains/dry standard cubic footfor EU 100 and EU 110 individually. This is more stringent than the limit prescribedby Minn. R. 7011.0610, subp. 1(A) which also applies.

5.0


Total Particulate Matter: less than or equal to 0.01 grains/dry standard cubic foot forEU 104, EU 114, EU 262, and EU 634 individually. This is more stringent than thelimit prescribed by Minn. R. 7011.0610, subp. 1(A) which also applies.

6.0


Total Particulate Matter: less than or equal to 0.18 lbs/million Btu heat input for EU634 individually. This is more stringent than the limit prescribed by Minn. R.7011.0610, subp. 1(A) which also applies.

7.0

LIMIT Minn. R. 7011.0610, subp. 1(A) Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limitapplies individually to each SV in this group except the bypass stacks.

8.0

LIMIT Minn. R. 7011.0610, subp. 1(B) Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60% opacity. An exceedance of this opacity standardoccurs whenever any one-hour period contains two or more 6-minute periodsduring which the average opacity exceeds 20%, or whenever any one-hour periodcontains one or more 6-minute periods during which the average opacity exceeds60%. This limit applies individually to each SV in this group except the bypassstacks.

9.0



10.0



11.0

LIMIT Title I Condition: 40 CFR Section52.21(k) and (j) (BACT); Minn. R.7007.3000


12.0

LIMIT Title I Condition: 40 CFR Section52.21(k) and (j) (BACT); Minn. R.7007.3000

Sulfur Dioxide: less than or equal to 0.072 lbs/million Btu heat input for EU 634individually when burning natural gas. This is more stringent than the limitprescribed by Minn. R. 7011.0610, subp. 2(B)(1) which also applies.

13.0

LIMIT Minn. R. 7011.0610, subp. 2(B)(1) Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when theindurating furnace is fired with a liquid fossil fuel. This limit applies individually toeach furnace in this group.

14.0

LIMIT Title I Condition: 40 CFR Section52.21(j) (BACT); Minn. R.7007.3000

Nitrogen Oxides: less than or equal to 40 parts per million for EU 634 individually.15.0

LIMIT Title I Condition: 40 CFR Section52.21(j) (BACT) limits; Minn. R.7007.3000

Nitrogen Oxides: less than or equal to 46 lbs/hour for EU 634 individually.16.0


CD Minn. R. 7007.0800, subp. 14 Wet ESP Requirement: The Permittee shall operate all wet electrostaticprecipitators associated with each furnace and, for each Wet ESP, with at least oneand no fewer than the same number of electric fields on as during the most recentperformance test that has shown compliance with the PM and PM10 emission limitsfor this group.

18.0




17 Dec, 2014 09:52Page 34 of 88

CD Minn. R. 7007.0800, subps. 4, 5 &14

Wet ESP Requirement: Monitor and record whether the electric field is on for eachCE once every 24 hours when in operation. Monitor and record primary amperage,primary voltage, and inlet gas temperature for each CE once every 24 hours whenin operation.

19.0

CD Minn. R. 7007.0800, subps. 4, 5 &14

Water Flow Rate: Monitor and record the water flow rate to each CE once every 24hours when in operation. The water flow rate shall be greater than or equal to 145gallons/minute. Once the operating range is established it becomes anenforceable part of this permit. A deviation from the established range shall triggera corrective action as detailed in the O&M plan.

20.0

CD Minn. R. 7007.0800, subp. 5 Bypass Event Record Keeping: the Permittee shall record and maintain records ofthe time, date, duration, cause, and corrective action of wet ESP bypass events.

21.0

CD hdr MONITORING REQUIREMENTS22.0

CD Title I Condition: 40 CFR Section52.21(j): (BACT); Minn. R.7007.3000; Minn. R. 7017.1006

Emissions Monitoring: The owner or operator shall install and operate a NOxContinuous Emission Monitoring System (CEMS) to measure NOx emissionsfrom EU 634. One NOx monitor shall be installed on each stack (SV 266, SV 267,and SV 268).

23.0

CD Title I Condition: 40 CFR Section52.21(j): (BACT); Minn. R.7007.3000; Minn. R. 7017.1006

Emissions Monitoring: The owner or operator shall install and operate an offgasflow monitoring system to measure offgas flow from EU 634. One flow meter shallbe installed on each stack (SV 266, SV 267, and SV 268).

(This is needed to determine the mass of emissions from the concentrationmeasurements.)

24.0

S/A Title I Condition: 40 CFR Section52.21(j): (BACT); Minn. R.7007.3000; Minn. R. 7017.1006

Initial Startup of the Monitor: due 180 days after Initial Startup of Furnace 5. As ofthis date, each of the NOx monitors and flow meters shall be installed andoperational.

25.0



Initial Performance Test: due 180 days after Initial Startup to measure PM, PM10,and SO2 emissions from Furnace 5. Sampling shall be performed for at least onestack and the gas flow rate shall be determined for all stacks except the bypassstacks.

27.0


Performance Test: due before 08/28/2014 and every three years thereafter tomeasure PM and PM10 emissions from two furnaces (on a rotating basis, one fromFurnaces 11 and 12 and the other from Furnaces 5 and 6) in this group. PM andPM10 sampling shall be performed for at least two stacks for Furnace 11 orFurnace 12, and for at least one stack for Furnace 5 or Furnace 6. Gas flow rateshall be determined for all stacks of each furnace except the bypass stacks.

28.0


Performance Test: due 60 days after Startup with fuel oil followed by 500 hours ofuse of fuel oil at any furnace, to measure SO2 emissions. Sampling shall beperformed for at least two stack for Furnace 11 or Furnace 12, and for at least onestack for Furnace 5 or Furnace 6. Gas flow rate shall be determined for all stacks ofeach furnace except the bypass stacks.

29.0


Notification: due 15 days after Startup with fuel oil followed by 500 hours of use offuel oil at any furnace.

30.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after Initial Performance Test for SO2emissions from Furnace 5. The plan shall specify a testing frequency for this groupon a rotating basis, based on the test data and MPCA guidance. Futureperformance tests based on one-year (12 months), 36 months, and 60 monthsintervals, or as applicable, shall be required upon written approval of the MPCA.

31.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after Initial Performance Test for SO2emissions while burning fuel oil for any furnace (EU100, EU110, EU262, orEU634). The plan shall specify a testing frequency for this group on a rotatingbasis, based on the test data and MPCA guidance. Future performance testsbased on one-year (12 months), 36 months, and 60 months intervals, or asapplicable, shall be required upon written approval of the MPCA.

32.0



33.0




17 Dec, 2014 09:52Page 35 of 88

LIMIT 40 CFR Section 63.9590(a);40CFR Section 63.9621(c); Minn. R.7011.8030

Total Particulate Matter: less than or equal to 0.01 grains/dry standard cubic footusing a 6-hour Average and on the basis of a flow-weighted mean concentrationusing test methods and procedures consistent with 40 CFR Section 63.9621(c)(1) -(3) and Table 1. For each indurating source, the Permittee shall determine theflow-weighted mean concentration of particulate matter emissions from all emissionunits in each affected source following the procedures in 40 CFR Section63.9620(b)and 63.9621(c).

34.0

S/A 40 CFR Section 63.9630(b); Minn.R. 7011.8030






35.0






36.0







37.0




17 Dec, 2014 09:52Page 36 of 88







38.0







39.0







40.0




17 Dec, 2014 09:52Page 37 of 88







41.0







42.0







43.0




17 Dec, 2014 09:52Page 38 of 88







44.0







45.0







46.0

LIMIT 40 CFR Section 63.9590(b)(4); 40CFR Section 63.9622(d); Minn. R.7011.8030


47.0




48.0




17 Dec, 2014 09:52Page 39 of 88



49.0



50.0




51.0



52.0



53.0




54.0



55.0


Water flow rate: greater than or equal to 144 gallons/hour using 24-hour BlockAverage for CE104 (EU104/SV104). This limit is established following theprocedures in 40 CFR Section 63.9622.

56.0




57.0



58.0



59.0




60.0



61.0



62.0




63.0



64.0



65.0




17 Dec, 2014 09:52Page 40 of 88




66.0



67.0



68.0




69.0



70.0



71.0




72.0



73.0



74.0




75.0



76.0



77.0




78.0



79.0



80.0




81.0



82.0




17 Dec, 2014 09:52Page 41 of 88



83.0




84.0



85.0



86.0




87.0



88.0



89.0




90.0



91.0



92.0




93.0



94.0

CD 40 CFR Section 63.9622(d); Minn.R. 7011.8030;

The Permittee shall establish site-specific operating limits according to the followingprocedures:1. Using the CPMS required in 40 CFR Section 63.9631(e), measure and recordthe secondary voltage, water flow rate, and stack outlet temperature every 15minutes during each run of the particulate matter performance test.2. For each individual test run, calculate and record the average value forsecondary voltage, and water flow rate. Operating limits are established as thelowest average value for each operating parameter corresponding to any of thethree test runs.3. For each individual test run, calculate and record the average value of stackoutlet temperature. The limit is established as the maximum average value forstack outlet temperature corresponding to any of the three test runs.

95.0


Install, operate, and maintain each CPMS according to the requirements in 40 CFRSection 63.9632(b)-(e) and monitor the daily average secondary voltage, dailyaverage stack outlet temperature, and daily average water flow rate according tothe requirements in 40 CFR Section 63.9633.

96.0




17 Dec, 2014 09:52Page 42 of 88

CD 40 CFR Section 63.9634(h); Minn.R. 7011.8030

The Permittee shall demonstrate continuous compliance by:1. Maintaining the daily average secondary voltage and daily average water flowrate for each field at or above the minimum levels established during the initial orsubsequent performance test. 2. Operating and maintaining each CPMS accordingto 40 CFR section 63.9632(b) and recording all the information needed todocument conformance with these requirements. 3. Collecting and reducingmonitoring data for secondary voltage, stack outlet temperature and water flow rateaccording to 40 CFR section 63.9632(c) and recording all the information needed todocument conformance with these requirements.4. If the daily average secondary voltage for each field is below the operating limitsestablished for a corresponding emission unit or group of similar emission units, thePermittee shall then follow the corrective action procedures in 40 CFR Section63.9634(j).

97.0




17 Dec, 2014 09:52Page 43 of 88

Subject Item: GP 015 Furnace Discharge of Finished Pellets

Associated Items: CE 120 Rotoclone

CE 121 Rotoclone

CE 265 Rotoclone










NC/CA




PM < 10 micron: less than or equal to 0.011 grains/dry standard cubic foot for SV120 and SV 121 individually.

2.0



3.0

LIMIT Title I Condition: 40 CFR Section52.21(k) & (j) (BACT); Minn. R.7007.3000


4.0


Total Particulate Matter: less than or equal to 0.011 grains/dry standard cubic footfor SV 120 and SV 121 individually. This is more stringent than the limit prescribedby Minn. R. 7011.0710, subp. 1(A) which also applies.

5.0

LIMIT Title I Condition: 40 CFR Section52.21(k)&(j) (BACT); Minn. R.7007.3000


6.0

LIMIT Title I Condition: 40 CFR Section52.21(k) & (j) (BACT); Minn. R.7007.3000


7.0


8.0


9.0





17 Dec, 2014 09:52Page 44 of 88

CD Minn. R. 7007.0800, subps. 4, 5 &14

Gas Stream Pressure drop: Upon installation of monitoring equipment, monitor andrecord individually for each CE at least once every day when in operation. Once theoperating range is established it becomes an enforceable part of this permit. Adeviation from the established range shall trigger a corrective action as detailed inthe O&M plan.

This requirement of gas stream pressure drop may be replaced with a requirementof monitoring the associated fan motor amperage, if MPCA approves supportingfield data submitted by the Permittee for such replacement. Such field data shallbe developed during Initial Performance Testing for at least one rotoclonecontrolled stack each of GP 015 and GP 016. In the interim before the MPCAapproval, the Permittee shall perform both gas stream pressure drop monitoringand fan motor amperage monitoring to initiate the supporting field datadevelopment.

11.0

CD Minn. R. 7007.0800, subps. 4, 5 &14

Liquid Flow Rate: Upon installation of monitoring equipment, monitor and recordindividually the scrubbing liquid flow rate to CE 274 at least once every day when inoperation. Once the operating range is established it becomes an enforceable partof this permit. A deviation from the established range shall trigger a correctiveaction as detailed in the O&M plan.

12.0


S/A Title I Condition: 40 CFR Section52.21(k)&(j) (BACT); Minn. R.7007.3000; Minn. R. 7017.2020,subp. 1

Initial Performance Test: due 180 days after Resuming Operation to measure PMand PM10 from SV 269.

14.0


Performance Test: due 180 days after Resuming Operation of any emission unit inGP 015, to measure PM and PM10 emissions from one stack in this group otherthan SV 269. The presently required 3-year testing frequency for this group wouldrequire testing again by 6/15/2012 unless a new testing frequency is established.

15.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after 11/17/2005. The Plan shall specify atesting frequency for this group on a rotating basis, based on the test data andMPCA guidance. Future performance tests based on one-year (12 months), 36months, and 60 months intervals, or as applicable, shall be required upon writtenapproval of the MPCA.

16.0



17.0

LIMIT 40 CFR Section 63.9590(a); 40CFR Section 63.9621(b); Minn. R.7011.8030

Total Particulate Matter: less than or equal to 0.008 grains/dry standard cubic footusing 6-hour average and on the basis of a flow-weighted mean concentrationusing test methods and procedures consistent with 40 CFR Section 63.9621(b)(1) -(3) and Table 1. For each finished pellet handling source, the Permittee shalldetermine the flow-weighted mean concentration of particulate matter emissionsfrom all emission units in each affected source following the procedures in 40 CFRSection 63.9620(c) and 63.9621(b).

18.0

S/A 40 CFR Section 63.9630(c); Minn.R. 7011.8030

Performance Test: due before end of each calendar 60 months starting 12/31/2011to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(b)(1) - (3) and 40 CFR pt. 63, subp. RRRRR, Table 1 todemonstrate compliance with Taconite NESHAP finished pellet handling limitations.


19.0

LIMIT 40 CFR Section 63.9590(b)(1); 40CFR Section 63.9622(a); Minn. R.7011.8030

Water flow rate: greater than or equal to 144 gallons/minute using 24-hour BlockAverage . This limit is established following the procedures in 40 CFR Section63.9622.

20.0


Pressure Drop: greater than or equal to 8.8 inches of water column using 24-hourBlock Average measured across the wet scrubber. This limit is establishedfollowing the procedures in 40 CFR Section 63.9622.

21.0




17 Dec, 2014 09:52Page 45 of 88

CD 40 CFR Section 63.9622(a)(1)-(2);Minn. R. 7011.8030


22.0

CD 40 CFR Section 63.9622(a)(3);Minn. R. 7011.8030


23.0

CD 40 CFR Section 63.9631(b); Minn.R. 7011.8030


24.0



25.0



26.0




17 Dec, 2014 09:52Page 46 of 88

Subject Item: GP 016 Pellet Screening (indoor - product & hearth layer)


CE 122 Rotoclone

CE 123 Rotoclone

CE 124 Rotoclone

CE 125 Rotoclone






SV 097 Hearth Layer





NC/CA





2.0


PM < 10 micron: less than or equal to 0.011 grains/dry standard cubic foot for EU122 - 124 individually.

3.0



4.0



5.0


Total Particulate Matter: less than or equal to 0.011 grains/dry standard cubic footfor EU 122 - 124 individually. This is more stringent than the limit as prescribed by40 CFR Section 60.382(a)(1) which also applies.

6.0



7.0


Total Particulate Matter: less than or equal to 0.05 grams/dry standard cubic meter(0.022 grains/dry standard cubic foot) of exhaust gas on and after the date onwhich the performance test required is completed. This limit applies individually toeach unit in this group.

8.0


Opacity: less than or equal to 7 percent opacity for SV 097.9.0


CD 40 CFR Section 60.384(a); 40CFR Section 60.385(b); Minn. R.7011.2700

Gas Stream Pressure Drop: Install, calibrate, maintain, and operate a monitoringdevice for each CE in this group for the continuous measurement and recording ofthe change in pressure of the gas stream through the CE. The monitoring devicemust be certified by the manufacturer to be accurate within 250 Pascals (1 inchwater) gauge pressure, plus or minus; and must be calibrated on an annual basis inaccordance with manufacturer's instructions.

11.0


On SV 097, Hearth Layer, maintain differential pressure across filter as follows:Pressure Drop: greater than or equal to 3.0 inches of water column and less than orequal to 10.0 inches of water column

12.0




17 Dec, 2014 09:52Page 47 of 88

CD 40 CFR Section 60.384(a); 40CFR Section 60.385(b); Minn. R.7011.2700

Fan Motor Amperage: Install, calibrate, maintain, and operate a monitoring devicefor each CE in this group, except CE 097, for the continuous measurement andrecording of the fan motor amperage draw on the CE. This alternative monitoringparameter is approved for this group as per a November 30, 2004, letter from U.S.EPA to Northshore Mining. By no later than September 18, 2006, establish theoperating range and submit it in an updated O&M plan. Once submitted, it shallbecome an enforceable part of this permit. A deviation from the established rangeshall trigger a corrective action as detailed in the O&M plan.

13.0

CD Minn. R. 7007.0800, subps. 2 &14


14.0



Performance Test: due 120 days after Resuming Operation of EU 097 and everyfive years thereafter to measure PM and PM10 emissions from SV 097.

16.0


Performance Test: due 120 days after Resuming Operation of any emission unit inGP 016, to measure PM and PM10 emissions from one stack in this group otherthan SV 097.

17.0



18.0


Total Particulate Matter: less than or equal to 0.008 grains/dry standard cubic footusing 24-hour Block Average using 6-hour average and on the basis of aflow-weighted mean concentration using test methods and procedures consistentwith 40 CFR Section 63.9621(b)(1) - (3) and Table 1. For each finished pellethandling source, the Permittee shall determine the flow-weighted meanconcentration of particulate matter emissions from all emission units in eachaffected source following the procedures in 40 CFR Section 63.9620(c) and63.9621(b).

19.0

S/A 40 CFR Section 63.9630(c); Minn.R. 7011.8030

Performance Test: due before end of each calendar 60 months starting 12/31/2013to measure particulate matter consistent with test methods and procedures in 40CFR Section 63.9621(b)(1) - (3) and 40 CFR pt.63, subp. RRRRR, Table 1 todemonstrate compliance with Taconite NESHAP finished pellet handling limitations.

The first performance test in the five calendar year period after initial compliancedemonstration applying to CE 123, CE 124, CE 125, and CE 126 was completedon 09/23/2014.The first performance test in the five calendar year period after initial compliancedemonstration applying to CE 097 was completed on 08/11/2014.

20.0


Water flow rate: greater than or equal to 130 gallons/minute using 24-hour BlockAverage . This limit applies to CE122, CE123, CE124 and CE125 individually. Thislimit is established following the procedures in 40 CFR Section 63.9622.

21.0


Pressure Drop: greater than or equal to 7.0 inches of water column using 24-hourBlock Average measured across the wet scrubber. This limit applies to CE122,CE123, CE124 and CE125 individually. This limit is established following theprocedures in 40 CFR Section 63.9622.

22.0



23.0



24.0



25.0




17 Dec, 2014 09:52Page 48 of 88



26.0



27.0




17 Dec, 2014 09:52Page 49 of 88

Subject Item: GP 019 Concentrate Loadout Operations

Associated Items: CE 205 6% or Greater Moisture Content






EU 637 Concentrate Loadout Conveyor - Conveyor

EU 638 Concentrate Elevating Conveyor - Conveyor

EU 639 Concentrate Transfer Conveyor - Conveyor

EU 640 Concentrate Shuttle Conveyor - Conveyor



NC/CA




Opacity: less than or equal to 10 percent opacity for any Process FugitiveEmissions.

2.0


S/A 40 CFR Section 60.7(a)(3); Minn.R. 7019.0100, subp. 1

Notification of the Actual Date of Initial Startup: due 15 days after Initial Startup foremission units (beyond EU 637) in GP 019 (Concentrate Loadout Operations).

4.0


S/A 40 CFR Section 60.385(a) & (b);Minn. R. 7011.2700

Initial Performance Test: due 60 days after achieving maximum capacity, but nolater than 180 days after Initial Startup, to measure Process Fugitive Emissionsfrom emission units (beyond EU 637) in GP 019.

6.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after Initial Performance Test. The plan shallspecify a testing frequency for this group on a rotating basis, based on the test dataand MPCA guidance. Future performance tests based on one-year (12 months),36 months, and 60 months intervals, or as applicable, shall be required uponwritten approval of the MPCA.

7.0




17 Dec, 2014 09:52Page 50 of 88

Subject Item: GP 020 Taconite MACT - All Affected Sources















































17 Dec, 2014 09:52Page 51 of 88












CE 120 Rotoclone

CE 121 Rotoclone

CE 122 Rotoclone

CE 123 Rotoclone

CE 124 Rotoclone

CE 125 Rotoclone




CE 265 Rotoclone



























17 Dec, 2014 09:52Page 52 of 88

Associated Items: EU 023 Dry Cobbing - West Center - Separation Equipment















































17 Dec, 2014 09:52Page 53 of 88

Associated Items: EU 643 60 Conveyor - Conveyor

EU 644 I Conveyor - Conveyor

EU 645 J Conveyor - Conveyor

EU 646 New Conveyor - Conveyor




















SV 026 Tails Belts

SV 027 Tails Belts

SV 028 Tails Belts

SV 029 Tails Belts





















17 Dec, 2014 09:52Page 54 of 88






SV 097 Hearth Layer





















SV 266 Fce 5 HE-WG #501;#502;#503

SV 267 Fce 5 HE-WG #501;#502;#503

SV 268 Fce 5 HE-WG #501;#502;#503









NC/CA



The requirements of the Taconite MACT apply individually to each unit in this groupunless otherwise stated. Additional information regarding compliance with SubpartRRRRR is presented in GP 003 � 010 and GP 014 � 016.

1.0




17 Dec, 2014 09:52Page 55 of 88

CD 40 CFR Section 63.9591; 40 CFRSection 63.9624; 40 CFR Section63.9635; Minn. R. 7011.8030

The Permittee shall prepare a fugitive dust emissions control plan in accordancewith the requirements in 40 CFR Section 63.9591.

The Permittee shall prepare, and at all times operate according to, the fugitive dustcontrol plan that describes the measures that will be put in place to control fugitivedust emissions from stockpiles, material transfer points, plant roadways, tailingsbasin, pellet loading areas, and yard areas.

2.0

CD 40 CFR Section 63.9591(b); 40CFR Section 63.9624(b); Minn. R.7011.8030

A copy of the Fugitive Dust Emissions Control Plan shall be submitted for approvalto the Administrator on or before the applicable compliance date for the affectedsource as specified in 40 CFR Section 63.9583.

3.0

CD 40 CFR Section 63.9591(c); Minn.R. 7011.8030

The Permittee may use an existing fugitive dust emissions control plan provided itmeets the following requirements:1. The plans satisfies the requirements of 40 CFR Section 63.9591(a).2. The plan describes the current measures to control fugitive dust emissionsources.3. The plan has been approved as part of a State implementation plan or title Vpermit.

4.0

CD 40 CFR Section 63.9591(d); 40CFR Section 63.9635(b); Minn. R.7011.8030

The Permittee shall maintain a current copy of the fugitive dust emissions controlplan onsite, and it shall be available for inspection upon request. The Permitteeshall keep the plan for the life of the affected source or until the affected source isno longer subject to the requirements of this subpart.

5.0

CD 40 CFR Section 63.9600(a); Minn.R. 7011.8030

At all times, including periods of startup, shutdown and malfunction, the Permitteeshall operate and maintain the emission unit(s) subject to 40 CFR pt. 63, subp.RRRRR, including air pollution control and monitoring equipment, in a mannerconsistent with good air pollution control practices for minimizing emissions at leastto the levels required by 40 CFR Section 63.6(e)(1)(i).

6.0

CD 40 CFR Section 63.9600(b); 40CFR Section 63.9625(a) and (b);40 CFR Section 63.9636(b); Minn.R. 7011.8030

Operation and Maintenance Plan: Prepare, and at all times operate according to, awritten operation and maintenance (O&M) plan for each control device used forcompliance with any particulate matter emission limit in 40 CFR pt. 63, subp.RRRRR, Table 1 and to meet the requirement of each indurating furnace subject togood combustion practices (GCP). The O&M Plan shall contain the followingcomponents:1. Preventative maintenance for each control device;2. Corrective action procedures for bag leak detection systems;3. Corrective action procedures for continuous parametric monitoring systems(CPMS) for air pollution control devices except baghouses; and4. Good combustion practices for each indurating furnace.The permittee shall maintain a current copy of the O&M Plan onsite, and it must beavailable for inspection upon request.

7.0

CD 40 CFR Section 63.9600(b)(1);Minn. R. 7011.8030

Preventative maintenance for each control device includes a preventativemaintenance schedule that is consistent with the manufacturer�s instructions forroutine and long-term maintenance.

8.0


CPMS corrective action procedures for all air pollution control devices exceptbaghouses: In the event that an established operating limit for an air pollutioncontrol device is exceeded, except for a baghouse, the Permittee shall initiatecorrective action to determine the cause of the operating limit exceedance andcomplete the corrective action within 10 calendar days. The corrective actionprocedures shall be consistent with the installation, operation, and maintenanceprocedures listing in the site-specific CPMS monitoring plan in accordance with 40CFR Section 63.9632(b).

9.0


Good combustion practices for indurating furnaces: Identify and implement a set ofsite-specific GCP for each type of indurating furnace at the facility. These GCPshould correspond to standard operating procedures for maintaining proper andefficient combustion within each indurating furnace. GCP include, but are notlimited to, the actions listed in 40 CFR Section 63.6900(b)(3)(i)-(v).

10.0


The Permittee shall be in compliance with the requirements in paragraphs (1)through (6) at all times, except during periods of startup, shutdown, and malfunctionas defined in 40 CFR Section 63.2.1. The emission limitations in 40 CFR Section 63.9590.2. The work practice standards in 40 CFR Section 63.9591.3. The operation and maintenance requirements in 40 CFR Section 63.9600. 4.The notification requirements in 40 CFR Section 63.9640. 5. The reportingrequirements in 40 CFR Section 63.9641.6. The recordkeeping requirements in 40 CFR Section 63.9642.

11.0




17 Dec, 2014 09:52Page 56 of 88


During the period between the compliance date specified for the affected source in40 CFR Section 63.9583 and the date upon which continuous monitoring systemshave been installed and certified and any applicable operating limits have been set,the Permittee shall maintain a log detailing the operation and maintenance of theprocess and emissions control equipment. This includes the daily monitoring andrecordkeeping of air pollution control device operating parameters as specified in40 CFR Section 63.9590(b).

12.0


The Permittee shall develop a written startup, shutdown, and malfunction planaccording to the provisions in 40 CFR Section 63.6(e)(3).

13.0


Performance test methods and other procedures: The Permittee shall conduct eachperformance test according to the requirements in section 40 CFR Section63.7(e)(1) and 40 CFR Section 63.9621(b) and (c) for purposes of Taconite MACT.

14.0

CD 40 CFR Section 63.9622(f); Minn.R. 7011.8030

Operating limits may be changed for any air pollution control device as long as youmeet the requirements in paragraphs (f)(1) through (3) of this section.1. Submit a written notification to the Commissioner of your request to conduct anew performance test to revise the operating limit.2. Conduct a performance test to demonstrate compliance with the applicableemission limitation in Table 1 to this subpart.3. Establish revised operating limits according to the applicable procedures inparagraphs (a) through (e) of 40 CFR Section 63.9622.

15.0

CD 40 CFR Section 63.9625(d); 40CFR Section 63.9632(b); Minn. R.7011.8030

For each CPMS required by 40 CFR Section 63.9631, the Permittee shall developand make available for inspection upon request a site-specific monitoring plan thataddress the following requirements:1. Installation of the CPMS sampling probe or other interface at a measurementlocation relative to each affected emission unit such that the measurement isrepresentative of control of the exhaust emissions (e.g., on or downstream of thelast control device).2. Performance and equipment specifications for the sample interface, theparametric signal analyzer, and the data collection and reduction system.3. Performance evaluation procedures and acceptance criteria (e.g., calibrations).4. Ongoing operation and maintenance procedures in accordance with the generalrequirements of 40 CFR Section 63.8(c)(1), (3), (4)(ii), (7), and (8).5. Ongoing data quality assurance procedures in accordance with 40 CFR Section63.8(d).(continued below)

16.0

CD 40 CFR Section 63.9625(d); 40CFR Section 63.9632(b); Minn. R.7011.8030 (continued)

6. Ongoing recordkeeping and reporting procedures in accordance with 40 CFRSection 63.10(c), (e)(1), and (e)(2)(i).7. Corrective action procedures to be followed in the event an air pollution controldevice, except for a baghouse, exceeds an established operating limit as requiredin 40 CFR Section 63.9600(b)(3).

17.0


Unless otherwise specified, each CPMS shall meet the following requirements:1. Each CPMS shall complete a minimum of one cycle of operation for eachsuccessive 15-minute period and shall have valid data for at least 95 percent ofevery daily averaging period.2. Each CPMS shall determine and record the daily average of all recordedreadings.

18.0


The Permittee shall conduct a performance evaluation of each CPMS inaccordance with the site-specific monitoring plan.

19.0


The Permittee shall operate and maintain the CPMS in continuous operationaccording to the site-specific monitoring plan.

20.0

CD 40 CFR Section 63.9633; Minn. R.7011.8030

General Monitoring Requirements: except for monitoring malfunctions, associatedrepairs, and required quality assurance (calibrations, zero/span checks, etc.),monitoring shall be continuous at all times when the source is operating. ThePermittee shall not use data collected during malfunctions, repairs, and QA/QC tofulfill a data availability requirement or to assess compliance. The Permittee shalluse all the data collected during all other periods in assessing compliance.

21.0

CD 40 CFR Section 63.9634(j); 40CFR Section 63.9641(e); Minn. R.7011.8030

If the daily average operating parameter value for an emission unit or group ofsimilar emission units does not meet the corresponding established operating limit,the Permittee must then follow the following procedures:(continued below)

22.0




17 Dec, 2014 09:52Page 57 of 88

CD 40 CFR Section 63.9634(j); 40CFR Section 63.9641(e); Minn. R.7011.8030 (continued)

1. The Permittee must initiate and complete initial corrective action within 10calendar days and demonstrate that the initial corrective action was successful.During any period of corrective action, the Permittee must continue to monitor andrecord all required operating parameters for equipment that remains in operation.After 10 calendar days, measure and record the daily average operating parametervalue for the emission unit or group of similar emission units on which correctiveaction was taken. After the initial corrective action, if the daily average operatingparameter value for the emission unit or group of similar emission units meets theoperating limit established for the corresponding unit or group, then the correctiveaction was successful and the emission unit or group of similar emission units is incompliance with established operating limits and no reportable deviation occurred.

23.0


2. If the initial corrective action required in (1) was not successful, then thePermittee must complete additional corrective action within 10 calendar days anddemonstrate that the subsequent corrective action was successful. During anyperiod of corrective action, you must continue to monitor and record all requiredoperating parameters for equipment that remains in operation. After the second setof 10 calendar days allowed to implement corrective action, the Permittee mustagain measure and record the daily average operating parameter value for theemission unit or group of similar emission units. If the daily average operatingparameter value for the emission unit or group of similar emission units meets theoperating limit established for the corresponding unit or group, then the correctiveaction was successful and the emission unit or group of similar emission units is incompliance with established operating limits and no reportable deviation occurred.(continued below)

24.0


3. If the second attempt at corrective action required in paragraph (2) was notsuccessful, then the Permittee must repeat the procedures until the correctiveaction is successful. If the third attempt at corrective action is unsuccessful, thePermittee must conduct another performance test in accordance with theprocedures in 40 CFR section 63.9622(f) and report to the Commissioner as adeviation the third unsuccessful attempt at corrective action.4. After the third unsuccessful attempt at corrective action, the Permittee shallsubmit the written report required in (3) within 5 calendar days after the thirdunsuccessful attempt at corrective action. This report must notify the Commissionerthat a deviation has occurred and document the types of corrective measures takento address the problem that resulted in the deviation of established operatingparameters and the resulting operating limits.

25.0


The Permittee shall:1. Perform preventative maintenance for each control device in accordance with 40CFR section 63.9600(b)(1) and record all information needed to documentconformance with these requirements.2. Initiate and complete corrective actions for a bag leak detection system alarm inaccordance with 40 CFR section 63.9600(b)(2) and record all the informationneeded to document conformance with these requirements.3. Initiate and complete corrective actions for a CPMS when an establishedoperating limit for an air pollution control device, except for a baghouse, isexceeded in accordance with 40 CFR Section 63.9600(b)(3) and record allinformation needed to document conformance with these requirements.4. Implement and maintain site-specific GCP for each indurating furnace inaccordance with 40 CFR Section 63.9600(b)(4) and record all information neededto document conformance with these requirements.

26.0

CD 40 CFR Section 63.9637(a), and(b); Minn. R. 7011.8030

Deviations. The Permittee shall report each instance in which an emission limitationwas not met. This includes periods of startup, shutdown, and malfunction.The Permittee shall report each instance in which a work practice standard in 40CFR section 63.9591 was not met. The Permittee must report each instance inwhich an applicable operation and maintenance requirement in 40 CFR section63.9600 was not met. These deviations must be reported in accordance with therequirements in 40 CFR section 63.9641.

Deviations that occur during a period of startup, shutdown, or malfunction are notviolations if you demonstrate to the Commissioner�s satisfaction that you wereoperating in accordance with 40 CFR Section 63.6(e)(1).

27.0




17 Dec, 2014 09:52Page 58 of 88

CD 40 CFR Section 63.9641(a) and(b); 40 CFR Section 63.10(d)(5)(i);Minn. R. 7011.8030

Semiannual Compliance Report: due 30 days after end of each calendar half-yearfollowing Permit Issuance.

The facility shall submit semi-annual compliance reports for the Taconite MACT.The report covering the period from January 1 through June 30 is due on July 30.The report covering the period from July 1 through December 31 is due on January30. The report shall contain the information required by 40 CFR Section63.9641(b)(1)-(8).

This report may be submitted in conjunction with the startup, shutdown andmalfunction report required by 40 CFR Section 63.10(d)(5)(i).

28.0

CD 40 CFR Section 63.9641(c); 40CFR Section 63.10(d)(5)(ii); 40CFR Section 63.6(e)(3)(iv); Minn.R. 7011.8030; Minn. R.7019.0100, subp. 2

Immediate startup, shutdown, and malfunction report. Any time an action taken bythe Permittee during a startup or shutdown or malfunction (that caused the sourceto exceed any applicable emission limitation in the relevant emission standards),that is not consistent with the procedures specified in the affected source's SSMPlan, the Permittee shall report the actions taken for that event within 2 workingdays after commencing the actions followed by a letter within 7 working days afterthe end of the event. The reports must be in accordance with 40 CFR Section63.10(d)(5)(ii). The report shall include: (1) Certification of accuracy of report by aresponsible official; (2) Explanation of circumstances of the event; (3) Reasons fornot following the SSM Plan; (4) Description of all excess emissions and/or CPMSmonitoring exceedences which have occurred; and (5) Actions taken to minimizeemissions in conformance with 40 CFR Section 63.6(e)(1)(i).

29.0


Part 70 monitoring report. The Permittee shall report all deviations as defined in thissubpart in the semiannual monitoring report required by 40 CFR 70.6(a)(3)(iii)(A) or40 CFR 71.6(a)(3)(iii)(A). If you submit a compliance report for an affected sourcealong with, or as part of, the semiannual monitoring report required by 40 CFR70.6(a)(3)(iii)(A) or 40 CFR 71.6(a)(3)(iii)(A), and the compliance report includes allthe required information concerning deviations from any emission limitation oroperation and maintenance requirement in this subpart, submission of thecompliance report satisfies any obligation to report the same deviations in thesemiannual monitoring report. However, submission of a compliance report doesnot otherwise affect any obligation you may have to report deviations from permitrequirements for an affected source to your permitting authority.

30.0

CD 40 CFR Section 63.9642(a) and(c); Minn. R. 7011.8030

Recordkeeping. The Permittee shall keep the following records: 1. A copy of eachnotification and report that you submitted to comply with 40 CFR part 63, subpartRRRRR 2. The records in 40 CFR section 63.6(e)(3)(iii) through (v) related tostartup, shutdown, and malfunction. 3. Records of performance tests andperformance evaluations as required in 40 CFR section 63.10(b)(2)(viii). 4.Records required by 40 CFR Sections 63.9634 through 63.9636 to showcontinuous compliance with each applicable emission limitation, work practicestandard, and operation and maintenance requirement.

31.0


Bag leak detection system corrective action procedures: In the event a bag leakdetection system alarm is triggered, the Permittee shall initiate corrective action todetermine the cause of the alarm within 1 hour of the alarm, initiate correctiveaction to correct the cause of the problem within 24 hours of the alarm, andcomplete the corrective action as soon as practicable. Corrective actions mayinclude, but are not limited to the actions listed in 40 CFR Section63.9600(b)(2)(i)-(vi).

32.0


Install, operate, and maintain a bag leak detection system to monitor the relativechange in particulate matter loadings according to the requirements in 40 CFRSection 63.9632(a), and conduct inspections at their specified frequenciesaccording to the following requirements:1. Monitor the pressure drop across each baghouse cell each day to ensurepressure drop is within the normal operating range.2. Confirm that dust is being removed from hoppers through weekly visualinspections or other means of ensuring the proper functioning of removalmechanisms.3. Check the compressed air supply of pulse-jet baghouses each day.4. Monitor cleaning cycles to ensure proper operation using an appropriatemethodology.5. Check bag cleaning mechanisms for proper functioning through monthly visualinspections or equivalent means.6. Make monthly visual checks of bag tension on reverse air and shaker-typebaghouses.7. Confirm the physical integrity of the baghouse through quarterly visual in

33.0




17 Dec, 2014 09:52Page 59 of 88


Bag Leak Detection System Requirements: Each negative or positive pressurebaghouse equipped with a stack used for compliance with the Taconite MACT shallmeet the following requirements:1. The system shall be certified by the manufacturer to be capable of detectingemissions of particulate matter at concentrations of 10 milligrams per actual cubicmeter (0.0044 grains per actual cubic foot) or less.2. The system shall provide output of relative changes in particulate matter loadings3. The system shall be equipped with an alarm that will sound when an increase inrelative particulate loadings is detected over the alarm level set point establishedaccording to paragraph (a)(4) of this section. The alarm shall be located such that itcan be heard by the appropriate plant personnel.

34.0


Bag Leak Detection System Monitoring Plan: For each baghouse used forcompliance with the Taconite MACT, develop and implement a Bag Leak DetectionSystem Monitoring Plan. The plan shall be submitted to MPCA for approval. Theplan shall describe: 1. Installation of the bag leak detection system; 2. Initial andperiodic adjustment of the bag leak detection system including how the alarmset-point will be established. 3. Operation of the bag leak detection systemincluding quality assurance procedures. 4. How the bag leak detection system willbe maintained including a routine maintenance schedule and spare parts inventorylist.5. How the bag leak detection system output shall be recorded and stored.

35.0


To make the initial adjustment of the system, establish the baseline output byadjusting the sensitivity (range) and the averaging period of the device. Then,establish the alarm set points and the alarm delay time (if applicable). Following initial adjustment, do not adjust averaging period, alarm set point, oralarm delay time, without approval from the Commissioner except as provided for inparagraph (a)(6)(i) of this section. 1. Once per quarter, you may adjust thesensitivity of the bag leak detection system to account for seasonal effects,including temperature and humidity, according to the procedures identified in thesite-specific monitoring plan required under paragraph (a)(4) of this section.

Where multiple detectors are required, the system's instrumentation and alarm maybe shared among detectors.

The bag leak detector sensor must be installed downstream of the baghouse andupstream of any wet scrubber.

36.0

CD hdr PT. 63, SUBP. A GENERAL REQUIREMENTS37.0

CD 40 CFR Section 63.4(b); Minn. R.7011.7000

Circumvention. The Permittee shall not build, erect, install, or use any article,machine, equipment, or process to conceal an emission that would otherwiseconstitute noncompliance with a relevant standard. Such concealment includes, butis not limited to:1. The use of diluents to achieve compliance with a relevant standard based on theconcentration of a pollutant in the effluent discharged to the atmosphere.

38.0

CD 40 CFR Section 63.5(b)(6); Minn.R. 7011.7000

After the effective date of any relevant standard promulgated under 40 CFR pt. 63,equipment added (or a process change) to an affected source that is within thescope of the definition of affected source under the relevant standard shall beconsidered part of the affected source and subject to all provisions of the relevantstandard established for that affected source.

39.0

CD 40 CFR Section 63.6(e)(1)(i);Minn. R. 7011.7000

Proper Operation and Maintenance. At all times, including periods of startup,shutdown, and malfunction, the Permittee shall operate and maintain the emissionunit subject to the MACT standard and any associated air pollution controlequipment and monitoring equipment, in a manner consistent with safety and goodair pollution control practices for minimizing emissions.

40.0

CD 40 CFR Section 63.6(e)(1)(ii);Minn. R. 7011.7000

Malfunctions shall be corrected as soon as practicable after their occurrence.41.0

CD 40 CFR Section 63.6(e)(3)(i), 40CFR Section 63.8(c)(1)(iii); Minn.R. 7011.7000

Startup, shutdown, and malfunction plan (SSMP). The Permittee shall develop awritten SSMP that describes, in detail, procedures for operating and maintainingthe source during periods of startup, shutdown, and malfunction; and a program ofcorrective action for malfunctioning process, air pollution control, and monitoringequipment used to comply with the relevant standard. The plan requirements arefurther described in 40 CFR Section 63.6(e)(3)(i).

42.0




17 Dec, 2014 09:52Page 60 of 88

CD 40 CFR Section 63.6(e)(3)(iii) ;Minn. R. 7011.7000

When actions taken by Permittee during a startup or shutdown (and the startup orshutdown causes the source to exceed any applicable emission limitation), ormalfunction (including actions taken to correct a malfunction) are consistent withthe procedures specified in the affected source's SSMP, the Permittee shall keeprecords which demonstrate that the procedures specified in the SSMP werefollowed and describes the actions taken for that event.

43.0

CD 40 CFR Section 63.6(e)(3)(iv) ;Minn. R. 7011.7000

If an action taken by the Permittee during a startup, shutdown, or malfunction(including an action taken to correct a malfunction) is not consistent with theprocedures specified in the affected source's SSMP, and the source exceeds anyapplicable emission limitation in the relevant emission standard, then the Permitteeshall record the actions taken for that event and shall report such actions asspecified in 40 CFR Section 63.10(d)(5).

44.0

CD 40 CFR Section 63.6(e)(3)(v);Minn. R. 7011.7000

The Permittee shall maintain at the affected source a current SSMP and shall makethe plan available upon request for inspection and copying by the Commissionerand the Administrator. In addition, if the SSMP is subsequently revised, thePermittee shall maintain at the affected source each previous (i.e., superseded)version of the SSMP, and shall make each such previous version available forinspection and copying for a period of 5 years after revision of the SSMP.

45.0

CD 40 CFR Section 63.6(e)(3)(vi );Minn. R. 7011.7000

To satisfy the requirements of this section to develop a SSMP, the Permittee mayuse a standard operating procedures (SOP) manual, or other plan, provided thealternative plans meet all the requirements and are made available for inspection orsubmission.

46.0

CD 40 CFR Section 63.6(e)(3)(vii) ;Minn. R. 7011.7000

The Commissioner or the Administrator may require that a Permittee makechanges to the SSMP. Revisions to the SSMP will be required if the plan:1) Does not address a startup, shutdown, or malfunction event that has occurred;2) Fails to provide for the operation of the source (including associated air pollutioncontrol and monitoring equipment) during a startup, shutdown, or malfunction eventin a manner consistent with the general duty to minimize emissions established by40 CFR Section 63.6(e)(1)(i);3) Does not provide adequate procedures for correcting malfunctioning processand/or air pollution control and monitoring equipment as quickly as practicable; or4) Includes an event that does not meet the definition of startup, shutdown, ormalfunction listed in 40 CFR Section 63.2.

47.0

CD 40 CFR Section 63.6(e)(3)(viii);Minn. R. 7011.7000

The Permittee may periodically revise the SSMP as necessary to satisfy therequirements of 40 CFR subp. A or to reflect changes in equipment or proceduresat the affected source. Each such revision to a SSMP shall be reported in thesemiannual report required by 40 CFR Section 63.10(d)(5). If the SSMP fails toaddress or inadequately addresses an event that meets the characteristics of amalfunction but was not included in the SSMP, the Permittee shall revise the SSMPwithin 45 days after the event in accordance with 40 CFR Section 63.6(e)(3)(viii).

48.0

CD 40 CFR Section 63.6(e)(3)(ix);Minn. R. 7011.7000

Any revisions made to the SSMP shall not be deemed to constitute permit revisionsunder 40 CFR pt. 70 or pt. 71 and elements of the SSMP shall not be consideredan applicable requirement as defined by p.t 70 or pt. 71.

49.0

CD 40 CFR Section 63.6(f)(1); Minn.R. 7011.7000

Applicability. The non-opacity emission standards set forth in 40 CFR Section63.6(f)(1)-(3) shall apply at all times except during periods of startup, shutdown,and malfunction, and as otherwise specified in 40 CFR pt. 63, subp. RRRRR.

50.0


Methods for determining compliance will be, in part, based on the results ofperformance tests, conformance with operation and maintenance requirements,review of records, and inspection of the source as specified in 40 CFR Section63.6(f)(2).The Permittee many use the results of performance testing conducted previously ifit meets the requirements of 40 CFR Section 63.6(f)(iii).

51.0


Finding of compliance. The Commissioner or the Administrator will make a findingconcerning an affected source's compliance with a non-opacity emission standardupon obtaining all the compliance information required by the relevant standard andother information available to the Commissioner or the Administrator pursuant to 40CFR Section 63.6(e)(1)(i).

52.0

CD 40 CFR Section 63.7(b); 40 CFRSection 63.9(e); Minn. R.7017.2015; Minn. R. 7019.0100

Notification of performance test.1) The Permittee shall notify the Commissioner and the Administrator of theirintention to conduct a performance test at least 60 calendar days before theperformance test is initially scheduled to begin.2) In the event the Permittee is unable to conduct the performance test on the datespecified due to unforeseeable circumstances, the Permittee shall notify theCommissioner and the Administrator as soon as practicable and without delay priorto the scheduled performance test date and specify the date when the performancetest is rescheduled.

53.0




17 Dec, 2014 09:52Page 61 of 88

CD 40 CFR Section 63.7(c)(2); Minn.R. 7017.2015

Submission of site-specific test plan. Before conducting a required performancetest, the Permittee shall develop and, if requested by the Commissioner or theAdministrator, shall submit a site-specific test plan for approval in accordance withthe requirements of 40 CFR Section 63.7(c)(2).

54.0

CD 40 CFR Section 63.7(c)(3); Minn.R. 7017.2015

Approval of site-specific test plan. The Administrator will notify the Permittee ofapproval or intention to deny approval of the site-specific test plan (if review of thesite-specific test plan is requested) within 30 calendar days after receipt of theoriginal plan and within 30 calendar days after receipt of any supplementaryinformation.

55.0

CD 40 CFR Section 63.7(d); Minn. R.7017.2015

Performance testing facilities. The Permittee, at the request of the Commissioner orthe Administrator, shall provide performance testing facilities as specified in 40CFR Section 63.7(d).

56.0

CD 40 CFR Section 63.7(e)(1)-(2);Minn. R. 7017.2015

Conduct of performance tests.1) Performance tests shall be conducted under conditions based on representativeperformance (i.e., performance based on normal operating conditions) of theaffected source. Operations during periods of startup, shutdown, and malfunctionshall not constitute representative conditions for the purpose of a performance test,nor shall emissions in excess of the relevant standard during periods of startup,shutdown, and malfunction be considered a violation of the relevant standardsunless a determination of noncompliance is made under Section 63.6(e).2) Performance tests shall be conducted and data shall be reduced in accordancewith the test methods and procedures set forth in 40 CFR Section 63.7(e), in eachrelevant standard, and, if required, in applicable appendices of 40 CFR parts 51,60, 61. The Commissioner has delegation to approve a minor or intermediatemodification to a reference method or specified monitoring procedure as allowed forin 40 CFR

57.0

CD 40 CFR Section 63.7(e)(3); Minn.R. 7017.2015

Unless otherwise specified in a relevant standard or test method, eachperformance test shall consist of three separate runs using the applicable testmethod. Each run shall be conducted for the time and under the conditionsspecified in the relevant standard. For the purpose of determining compliance witha relevant standard, the arithmetic mean of the results of the three runs shall apply,unless otherwise approved in accordance with provisions of 40 CFR Section63.7(e)(3).

58.0

CD 40 CFR Section 63.7(g); Minn. R.7017.2015

Data analysis, recordkeeping, and reporting. Unless otherwise specified in arelevant standard or test method, or as otherwise approved by the Commissioneror Administrator in writing, results of a performance test shall include the analysis ofsamples, determination of emissions, and raw data. A performance test is�completed� when field sample collection is terminated. The Permittee shall reportthe results of the performance test to the Commissioner or Administrator before theclose of business on the 60th day following the completion of the performance test,unless specified otherwise in a relevant standard or as approved otherwise inwriting. The results of the performance test shall be submitted as part of thenotification of compliance status required under 40 CFR Section 63.9(h) to theappropriate permitting authority.

59.0

CD 40 CFR Section 63.8(a)(2); Minn.R. 7017.1010

All CMS required under relevant standards shall be subject to the provisions of 40CFR Section 63.8 upon promulgation of performance specifications for CMS asspecified in the relevant standard or otherwise by the Administrator.

60.0


Conduct of monitoring. Monitoring shall be conducted as set forth in 40 CFRSection 63.8(b)(1).

61.0


When the emissions from two or more affected sources are combined before beingreleased to the atmosphere, the Permittee may install an applicable CMS for eachemission stream or for the combined emissions streams, provided the monitoring issufficient to demonstrate compliance with the relevant standard unless otherwisestated in 40 CFR Section 63.8(b)(2).

62.0

CD 40 CFR Section 63.8(c)(1)-(3),and (7)-(8); Minn. R. 7017.1010

Operation and maintenance of continuous monitoring systems. The Permittee shallmaintain and operate each CMS in a manner consistent with good air pollutioncontrol practices.1) The Permittee shall keep the necessary parts for routine repairs of the affectedCMS equipment readily available.2) The Permittee shall ensure the read out, or other indication of operation, fromany CMS required for compliance with the emission standard is readily accessibleon site for operational control or inspection.3) All CMS shall be installed, operational, and the data verified prior to or inconjunction with conducting performance tests. Verification of operational statusshall, at a minimum, include completion of the manufacturer's written specificationsor recommendations for installation, operation, and calibration of the system.(continued below)

63.0




17 Dec, 2014 09:52Page 62 of 88

CD 40 CFR Section 63.8(c)(1)-(3),and (7)-(8); Minn. R. 7017.1010(continued)

4) A CMS is out of control if:i) The zero (low-level), mid-level (if applicable), or high-level calibration drift (CD)exceeds two times the applicable CD specification in the applicable performancespecification or in the relevant standard; orii) The CMS fails a performance test audit (e.g., cylinder gas audit), relativeaccuracy audit, relative accuracy test audit, or linearity test audit; or5) The Permittee shall submit all information concerning out-of-control periods,including start and end dates and hours and descriptions of corrective actionstaken, in the excess emissions and continuous monitoring system performancereport.

64.0

CD 40 CFR Section 63.8(c)(7)(ii);Minn. R. 7017.1010

When the CMS is out of control, the Permittee shall take the necessary correctiveaction and shall repeat all necessary tests which indicate that the system is out ofcontrol until the performance requirements are below the applicable limits. Thebeginning of the out-of-control period is the hour the Permittee conducts aperformance check (e.g., calibration drift) that indicates an exceedance of theperformance requirements established under this part. The end of the out-of-controlperiod is the hour following the completion of corrective action and successfuldemonstration that the system is within the allowable limits. During the period theCMS is out of control, recorded data shall not be used in data averages andcalculations, or to meet any data availability requirement.

65.0

CD 40 CFR Section 63.8(d); Minn. R.7017.1010

The Permittee shall develop and implement a CMS quality control program. As partof the quality control program, the Permittee shall develop and submit to theCommissioner or Administrator for approval upon request a site-specificperformance evaluation test plan for the CMS performance evaluation required in40 CFR Section 63.8(e)(3)(i). Each quality control program shall include, at aminimum, a written protocol that describes procedures for each of the followingoperations:i) Initial and any subsequent calibration of the CMS;ii) Determination and adjustment of the calibration drift of the CMS;iii) Preventive maintenance of the CMS, including spare parts inventory;iv) Data recording, calculations, and reporting;v) Accuracy audit procedures, including sampling and analysis methods; andvi) Program of corrective action for a malfunctioning CMS.(continued below)

66.0

CD 40 CFR Section 63.8(d); Minn. R.7017.1010 (continued)

The Permittee shall keep these written procedures on record for the life of theaffected source, to be made available for inspection, upon request. The Permitteeshall keep previous versions of the performance evaluation plan on record to bemade available for inspection upon request, for a period of 5 years after eachrevision to the plan. Written procedures may be incorporated into the SSMP toavoid duplication of planning and recordkeeping efforts.

67.0

CD 40 CFR Section 63.8(e); Minn. R.7017.1010

Performance evaluation of continuous monitoring systems

1) When required by a relevant standard, and at any other time the Administratormay require, the Permittee shall conduct a performance evaluation of the CMSaccording to the applicable specifications and procedures described in 40 CFRSection 63.8(e) or in the relevant standard.

2) Reporting performance evaluation results. The Permittee shall furnish theCommissioner and the Administrator a copy of a written report of the results of theperformance evaluation simultaneously with the results of the performance test orwithin 60 days of completion of the performance evaluation if no test is required,unless otherwise specified in a relevant standard.

68.0

CD 40 CFR Section 63.8(g); Minn. R.7017.1010

Reduction of monitoring data. The Permittee shall reduce the monitoring data asspecified in 40 CFR Section 63.8(g)(1)-(4).

69.0

CD 40 CFR Section 63.9(g), 40 CFRSection 63.8(e), 40 CFR Section63.10(e)(2); Minn. R. 7017.1010,Minn. R. 7019.0100

Additional notification requirements for sources with CMS. The Permittee shallsubmit to the Commissioner and the Administrator written notification as follows:1) A notification of the date the CMS performance evaluation under 40 CFR Section63.8(e) is scheduled to begin, submitted simultaneously with the notification of theperformance test date required under 40 CFR Section 63.7(b). If no performancetest is required, or if the requirement to conduct a performance test has beenwaived, the Permittee shall notify the Commissioner and the Administrator in writingof the date of the performance evaluation at least 60 calendar days before theevaluation is scheduled to begin;(continued below)

70.0




17 Dec, 2014 09:52Page 63 of 88

CD 40 CFR Section 63.9(g), 40 CFRSection 63.8(e), 40 CFR Section63.10(e)(2); Minn. R. 7017.1010,Minn. R. 7019.0100 (continued)

2) A notification that the criterion necessary to continue use of an alternative torelative accuracy testing, as provided by 40 CFR Section 63.8(f)(6), has beenexceeded. The notification shall be delivered or postmarked no later than 10 daysafter the occurrence of such exceedance, and it shall include a description of thenature and cause of the increased emissions.

71.0

CD 40 CFR Section 63.9(h); Minn. R.7019.0100

Notification of compliance status.Each time a notification of compliance status is required under 40 CFR pt. 63,subp. A, the Permittee shall submit to the Commissioner a notification ofcompliance status containing the information required by 40 CFR Section 63.9(h),signed by the responsible official who shall certify its accuracy, attesting to whetherthe source has complied with the relevant standard.The notification shall be sent by the 60th day following the completion of therelevant compliance demonstration activity specified in the relevant standard.

72.0

CD 40 CFR Section 63.9(j); Minn. R.7019.0100

Notification. Any change in the information already provided under 40 CFR Section63.9 shall be provided to the Commissioner and the Administrator in writing within15 calendar days after the change.

73.0

CD 40 CFR Section 63.10(a); Minn. R.7019.0100

The Permittee shall submit reports to the Commissioner and shall send a copy ofeach report to the Administrator.

74.0

CD 40 CFR Section 63.10(b)(1); Minn.R. 7019.0100, subp. 2(B)

Recordkeeping. The Permittee shall maintain files of all information (including allreports and notifications) required by 40 CFR pt. 63 in a form suitable and readilyavailable for expeditious inspection and review. The files shall be retained for atleast 5 years following the date of each occurrence, measurement, maintenance,corrective action, report, or record. At a minimum, the most recent 2 years of datashall be retained on site.

75.0

CD 40 CFR Section 63.10(b)(2); Minn.R. 7019.0100, subp. 2(B)

The Permittee shall maintain, at a minimum, the following records:1) the occurrence and duration of each startup or shutdown, when the startup orshutdown causes the source to exceed any applicable emission limitation in therelevant emission standard;2) the occurrence and duration of each malfunction of the process equipment or ofthe air pollution control equipment and monitoring equipment;3) all maintenance performed on the pollution control equipment;4) actions taken during periods of startup or shutdown when the source exceededapplicable emission limitations in a relevant standard and when such actions aredifferent from the procedures specified in the affected source's startup, shutdown,and malfunction plan (SSMP).(continued below)

76.0

CD 40 CFR Section 63.10(b)(2); Minn.R. 7019.0100, subp. 2(B)(continued)

5) actions taken during periods of malfunction (including corrective actions torestore malfunction process and air pollution control and monitoring equipment toits normal or usual manner of operation) when the actions taken are different fromthe procedures specified in the SSMP;6) all information necessary to demonstrate conformance with the affected source'sSSMP and actions taken in accordance with SSMP;7) each period during which a continuous monitoring system (CMS) ismalfunctioning or inoperative;8) all required measurements needed to demonstrate compliance with a relevantstandard;9) all results of performance test, CMS performance evaluations,10) all measurements as may be necessary to determine the conditions ofperformance tests and performance evaluations;11) all CMS calibration checks;12) all adjustments and maintenance performed on CMS;(continued below)

77.0

CD 40 CFR Section 63.10(b)(2); Minn.R. 7019.0100, subp. 2(B)(continued)

13) any information demonstrating whether a source is meeting the requirementsfor a waiver of record keeping or reporting requirements under this part;14) all documents supporting initial notifications and notifications of compliancestatus.

78.0

CD 40 CFR Section 63.10(d)(5)(i);Minn. R. 7019.0100

Periodic startup, shutdown, and malfunction reports. If actions taken by a Permitteeduring a startup or shutdown (and the startup or shutdown causes the source toexceed any applicable emission limitation in the relevant emission standards), ormalfunction of an affected source (including actions taken to correct a malfunction)are consistent with the procedures specified in the source's startup, shutdown, andmalfunction plan, the Permittee shall state such information in a startup, shutdown,and malfunction report.Actions taken to minimize emissions during such startups, shutdowns, andmalfunctions shall be summarized in the report and may be done in checklist form.(continued below)

79.0




17 Dec, 2014 09:52Page 64 of 88

CD 40 CFR Section 63.10(d)(5)(i);Minn. R. 7019.0100 (continued)

Such a report shall also include the number, duration, and a brief description foreach type of malfunction which occurred during the reporting period and whichcaused or may have caused any applicable emission limitation to be exceeded.Reports shall only be required if a startup or shutdown caused the source toexceed any applicable emission limitation, or if a malfunction occurred during thereporting period. The startup, shutdown, and malfunction report shall consist of aletter, containing the name, title, and signature of the Permittee who is certifying itsaccuracy, that shall be submitted to the Commissioner and the Administratorsemiannually.

80.0

CD 40 CFR Section 63.10(d)(5)(i);Minn. R. 7019.0100

Startup, shutdown, and malfunction report: due 30 days following the end of eachcalendar half year. The Permittee may submit this simultaneously with the excessemissions and continuous monitoring system performance (or other) reports. ThePermittee may request approval to reduce the frequency of reporting following theprocedures specified in 40 CFR Section 63.10(e)(3).

81.0

CD 40 CFR Section 63.10(d)(5)(ii);Minn. R. 7019.0100, subp. 2(B)

Immediate startup, shutdown, and malfunction reports. Notwithstanding theallowance to reduce the frequency of reporting for periodic startup, shutdown, andmalfunction reports, any time an action taken by a Permittee during a startup orshutdown that caused the source to exceed any applicable emission limitation inthe relevant emission standards, or malfunction is not consistent with theprocedures specified in the affected source's SSMP, the Permittee shall report theactions taken for that event within 2 working days after commencing actionsinconsistent with the plan followed by a letter within 7 working days after the end ofthe event.(continued below)

82.0

CD 40 CFR Section 63.10(d)(5)(ii);Minn. R. 7019.0100, subp. 2(B)(continued)

The immediate report required under this paragraph (d)(5)(ii) shall consist of atelephone call (or facsimile (FAX) transmission) to the Commissioner and theAdministrator within 2 working days after commencing actions inconsistent with theplan, and it shall be followed by a letter, delivered or postmarked within 7 workingdays after the end of the event. The report shall contain the information specified in40 CFR Section 63.10(d)(5)(ii).

83.0

CD 40 CFR Section 63.10(e)(3)(i)-(iv);Minn. R. 7019.0100

Excess emissions and continuous monitoring system performance report andsummary report. Excess emissions and parameter monitoring exceedances aredefined in relevant standards. The Permittee shall submit an excess emissions andcontinuous monitoring system performance report and/or a summary report to theCommissioner and the Administrator semiannually except when more frequentreporting is specifically required by a relevant standard or a reduction in frequencyis approved pursuant to 40 CFR Section 63.10(e)(3).

84.0

CD 40 CFR Section 63.10(e)(3)(v);Minn. R. 7019.0100

Content and submittal dates for excess emissions and monitoring systemperformance reports. All excess emissions and monitoring system performancereports and all summary reports, if required, shall be delivered or postmarked bythe 30th day following the end of each calendar half. Written reports of excessemissions or exceedances of process or control system parameters shall includeall the information required in 40 CFR Section 63.10(c)(5)- (c)(13), in 40 CFRSection 63.8(c)(7) and 40 CFR Section 63.8(c)(8), and in the relevant standard,and they shall contain the name, title, and signature of the responsible official whois certifying the accuracy of the report. When no excess emissions or exceedancesof a parameter have occurred, or a CMS has not been inoperative, out of control,repaired, or adjusted, such information shall be stated in the report.

85.0

CD 40 CFR Section 63.10(e)(3)(vi);Minn. R. 7019.0100

Summary report. One summary report shall be submitted for the hazardous airpollutants monitored at each affected source (unless the relevant standardspecifies that more than one summary report is required. The summary report shallbe entitled �Summary Report�Gaseous and Opacity Excess Emission andContinuous Monitoring System Performance� and shall contain the informationspecified in 40 CFR Section 63.10(e)(3)(vi).

86.0

CD 40 CFR Section 63.10(e)(3)(vii);Minn. R. 7019.0100

If the total duration of excess emissions or process or control system parameterexceedances for the reporting period is 1 percent or greater of the total operatingtime for the reporting period, or the total CMS downtime for the reporting period is 5percent or greater of the total operating time for the reporting period, both thesummary report and the excess emissions and continuous monitoring systemperformance report shall be submitted.

87.0




17 Dec, 2014 09:52Page 65 of 88




CE 281 Overfire Air




NC/CA


S/A Minn. R. 7007.0800, subp. 2 Notification of the Actual Date of Initial Startup: due 15 days after Initial Startup ofEU 001 following completion of modfications authorized for EU 001 by AirEmissions Permit No. 07500003-009.

1.0

S/A Minn. R. 7007.0800, subp. 2 Notification of the Date Construction Began: due 30 days after Start OfConstruction of the modifications authorized for EU 001 by Air Emissions PermitNo. 07500003-009.

2.0


LIMIT Minn. R. 7011.0510, subp. 1 Total Particulate Matter: less than or equal to 0.6 lbs/million Btu heat input .4.0


PM < 10 micron: less than or equal to 0.036 grains/dry standard cubic foot .5.0

LIMIT Minn. R. 7011.0510, subp. 2 Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity.

6.0

LIMIT Minn. R. 7011.0510, subp. 1 Sulfur Dioxide: less than or equal to 4.0 lbs/million Btu heat input when burningcoal.

7.0

LIMIT Minn. R. 7011.0510, subp. 1 Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when burningdistillate fuel oil.

8.0



9.0



10.0



11.0



12.0


Sulfur Dioxide: less than or equal to 0.5 lbs/million Btu heat input when burningdistillate fuel oil. The Permittee shall restrict the sulfur content of any grade ofcommercial fuel oil so that emissions of SO2 do not exceed this threshold. ThisTitle 1 condition is more stringent than the limit prescribed by Minn. R. 7011.0510,subp. 1 which also applies.

13.0

LIMIT Title I Condition: 40 CFR Section52.21(j); Minn. R. 7007.3000

Carbon Monoxide: less than or equal to 0.042 lbs/million Btu heat input .14.0

LIMIT Title I Condition: 40 CFR Section52.21(k); Title I Condition: 40 CFRSection 52.21(j); Minn. R.7007.3000

Carbon Monoxide: less than or equal to 21.54 lbs/hour .15.0





17 Dec, 2014 09:52Page 66 of 88

CD Minn. R. 7007.0800, subp. 2 Fuel Limits: The Permittee shall combust only natural gas, distillate fuel oil, or coalfor this unit.

17.0

CD Title I Condition: 40 CFR Section52.21(j); Minn. R. 7007.3000




(continued below)

18.0






(continued below)

19.0




20.0


The Permittee must complete an initial tune-up no later than January 31, 2016.21.0



22.0


S/A Title I Condition: 40 CFR Section52.21(k); Title I Condition: 40 CFRSection 52.21(j); Minn. R.7007.3000; Minn. R. 7017.2020,subp. 1


24.0

S/A Minn. R. 7017.2020, subp. 1;Minn. R. 7005.0100, subp. 35a



25.0




17 Dec, 2014 09:52Page 67 of 88

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after Initial Performance Test for COemissions from EU 001. The plan shall specify a testing frequency based on thetest data and MPCA guidance. Future performance tests based on 12-month,36-month, or 60-month intervals, or as applicable, shall be required upon writtenapproval of the MPCA.

26.0




17 Dec, 2014 09:52Page 68 of 88




CE 283 Overfire Air




NC/CA


S/A Minn. R. 7007.0800, subp. 2 Notification of the Actual Date of Initial Startup: due 15 days after Initial Startup ofEU 002 following completion of modfications authorized for EU 002 by AirEmissions Permit No. 07500003-009.

1.0

S/A Minn. R. 7007.0800, subp. 2 Notification of the Date Construction Began: due 30 days after Start OfConstruction of the modifications authorized for EU 002 by Air Emissions PermitNo. 07500003-009.

2.0


LIMIT Minn. R. 7011.0510, subp. 1 Total Particulate Matter: less than or equal to 0.6 lbs/million Btu heat input .4.0



LIMIT Minn. R. 7011.0510, subp. 2 Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity.

6.0

LIMIT Minn. R. 7011.0510, subp. 1 Sulfur Dioxide: less than or equal to 4.0 lbs/million Btu heat input when burningcoal.

7.0



8.0



9.0



10.0



11.0

LIMIT Title I Condition: 40 CFR Section52.21(j); Minn. R. 7007.3000

Carbon Monoxide: less than or equal to 0.062 lbs/million Btu heat input .12.0

LIMIT Title I Condition: 40 CFR Section52.21(k); Title I Condition: 40 CFRSection 52.21(j); Minn. R.7007.3000

Carbon Monoxide: less than or equal to 47.81 lbs/hour .13.0


CD Minn. R. 7007.0800, subp. 2 Fuel Limits: The Permittee shall combust only natural gas or coal for this unit.15.0




17 Dec, 2014 09:52Page 69 of 88





(continued below)

16.0






(continued below)

17.0




18.0


The Permittee must complete an initial tune-up no later than January 31, 2016.19.0



20.0


S/A Title I Condition: 40 CFR Section52.21(k); Title I Condition: 40 CFRSection 52.21(j); Minn. R.7007.3000; Minn. R. 7017.2020,subp. 1


22.0

S/A Minn. R. 7017.2020, subp. 1;Minn. R. 7005.0100, subp. 35a



23.0

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after Initial Performance Test for COemissions from EU 002. The plan shall specify a testing frequency based on thetest data and MPCA guidance. Future performance tests based on 12-month,36-month, or 60-month intervals, or as applicable, shall be required upon writtenapproval of the MPCA.

24.0




17 Dec, 2014 09:52Page 70 of 88

Subject Item: EU 005 Coal Transfer & Coal Bunkers - Conveyor

Associated Items: SV 005 Coal Transfer & Bunkers

NC/CA







3.0

LIMIT Minn. R. 7011.0710, subp. 1(A) Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735.

4.0

LIMIT Minn. R. 7011.0710, subp. 1(B) Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60% opacity. An exceedance of this opacity standardoccurs whenever any one-hour period contains two or more 6-minute periodsduring which the average opacity exceeds 20%, or whenever any one-hour periodcontains one or more 6-minute periods during which the average opacity exceeds60%.

5.0


CD Minn. R. 7007.0800, subps. 4, 5 &14

Process monitoring: the visual emissions observer in the facility staff shall checkstack visible emissions (opacity) once daily using a Daily Visible EmissionChecklist.

7.0


CD Minn. R. 7011.0075, subp. 2 The Permittee shall maintain each piece of control equipment according to themanufacturer's specification, shall conduct inspections, and maintaindocumentation of those actions as required by Minn. R. 7011.0075, subp. 2(A) to2(I).

9.0

LIMIT Minn. R. 7007.0800, subps. 2 and14; Minn. R. 7017.2025, subp. 3

Pressure Drop: greater than or equal to 1.0 inches of water column and less than orequal to 6.0 inches of water column as determined during the June 7, 2011performance test, unless a new range is set pursuant to Minn. R. 7017.2025, subp.3 based on the values recorded during the most recent MPCA-approvedperformance test where compliance was demonstrated. The new range shall beimplemented upon receipt of the Notice of Compliance letter granting preliminaryapproval. The range is final upon issuance of a permit amendment incorporatingthe change. The Permittee shall record the pressure drop at least once every 24hours when in operation.

10.0

CD Minn. R. 7007.0800, subps. 4 and5

Recordkeeping of Pressure Drop. The Permittee shall record the time and date ofeach pressure drop reading and whether or not the recorded pressure drop waswithin the range specified in this permit.

11.0

CD Minn. R. 7007.0800, subps. 4, 5,and 14

Corrective Actions: The Permittee shall take corrective action as soon as possible ifany of the following occur:- visible emissions are observed;- the recorded pressure drop is outside the required operating range; or- the fabric filter or any of its components are found during the inspections to needrepair.Corrective actions shall return the pressure drop to within the permitted range,eliminate visible emissions, and/or include completion of necessary repairsidentified during the inspection, as applicable. Corrective actions include, but arenot limited to, those outlined in the O & M Plan for the fabric filter. The Permitteeshall keep a record of the type and date of any corrective action taken for eachfilter.

12.0



Initial Performance Test: due before 12/15/2005 to measure PM and PM10emissions.

14.0

S/A Minn. R. 7017.2020, subp. 1 Initial Performance Test: due before 12/15/2005 to measure opacity.15.0




17 Dec, 2014 09:52Page 71 of 88

S/A Minn. R. 7017.2020, subp. 1 Testing Frequency Plan: due 60 days after 10/12/2005. The plan shall specify atesting frequency based on the test data and MPCA guidance. Future performancetests based on one-year (12 months), 36 months, and 60 months intervals, or asapplicable, shall be required upon written approval of the MPCA.

16.0




17 Dec, 2014 09:52Page 72 of 88

Subject Item: EU 043 West Storage Bin #12 - Silo/Bin

Associated Items: CE 043 Multiple Cyclone w/o Fly Ash Reinjection - Most Multiclones


NC/CA







3.0

LIMIT Minn. R. 7011.0710, subp. 1(A) Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic foot ofexhaust gas unless required to further reduce emissions to comply with the lessstringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735.

4.0

LIMIT Minn. R. 7011.0710, subp. 1(B) Opacity: less than or equal to 20 percent opacity except for one six-minute periodper hour of not more than 60 percent opacity. An exceedance of this opacitystandard occurs whenever any one-hour period contains two or more six-minuteperiods during which the average opacity exceeds 20%, or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60%.

5.0


CD Minn. R. 7007.0800, subps. 4, 5 &14

Process monitoring: the visual emissions observer in the facility staff shall checkstack visible emissions (opacity) once daily using one or more Daily VisibleEmission Checklists.

7.0




17 Dec, 2014 09:52Page 73 of 88

Subject Item: EU 636 60A to 60B transfer and 5x12 screen - Screens

NC/CA




Opacity: less than or equal to 10 percent opacity for any Process FugitiveEmission. Note that, due to lack of a stack/vent associated with any indoorconveyor transfer point in EU 636, PM and Opacity limits specified in 40 CFR60.382(a) are not given for EU 636.

2.0




17 Dec, 2014 09:52Page 74 of 88

Subject Item: EU 643 60 Conveyor - Conveyor



NC/CA


LIMIT Title I Condition: To avoidclassification as majormodification under 40 CFRSection 52.21 and Minn. R.7007.3000; Minn. R. 7007.0800,subp. 2


1.0

CD hdr NSPS SUBP. LL REQUIREMENTS2.0



3.0

CD 40 CFR Section 60.11(c); Minn. R.7017.2015


4.0

S/A 40 CFR Section 60.384(a); 60CFR Section 60.8(a); Minn. R.7011.2700


5.0

CD hdr MONITORING, RECORDKEEPING, AND REPORTING REQUIREMENTS6.0

CD Minn. R. 7007.0800, subp. 4 Visible Emissions: The Permittee shall check EU643 at a location in whichemissions from EU643 would be expected to vent to the atmosphere once eachday of operation for any visible emissions from the conveyor transfer points duringdaylight hours while the unit is conveying taconite pellets.


7.0

CD Minn. R. 7007.0800, subp. 5 Recordkeeping: The Permittee shall keep a record of all visible emission checks,the date and time of the visible emissions check, whether or not any visibleemissions were observed and of any corrective actions taken.

8.0

CD Minn. R. 7007.0800, subp. 4 Monitoring: the Permittee shall perform monthly periodic inspections to check thatwater is flowing to discharge spray nozzles in the wet suppression system. ThePermittee shall initiate corrective action within 24 hours and complete correctiveaction as expediently as practical if the Permittee finds that water is not flowingproperly during an inspection of the water spray nozzles. The Permittee shallrecord each inspection of the water spray nozzles, including the date of eachinspection and any corrective actions taken.

9.0



10.0



11.0




17 Dec, 2014 09:52Page 75 of 88

Subject Item: EU 644 I Conveyor - Conveyor



NC/CA




1.0




3.0



4.0



5.0




7.0


8.0


9.0



10.0



11.0




17 Dec, 2014 09:52Page 76 of 88

Subject Item: EU 645 J Conveyor - Conveyor



NC/CA




1.0




3.0



4.0



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Subject Item: EU 646 New Conveyor - Conveyor



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Subject Item: FS 013 Pellet handling - pellet discharged from bridge to yard: 64 to yard - Material Handling/Transfer/Storage

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CD Minn. R. 7007.0800, subp. 2 The requirements listed below apply to FS013f (conveyor transfer pile).1.0



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LIMIT Minn. R. 7011.0110 Opacity: less than or equal to 10 percent3.0

CD Minn. R. 7007.0800, subp. 4 Visible Emissions: The Permittee shall check FS013f for any visible emissions onceeach day of operation during daylight hours.

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Subject Item: FS 016 Pellet reclaiming - (EU B2, B4, B5, B6 in Barr 97): Loader to H1, Loader to H2, H1 to 67, H2 to 67, 67 to

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CD Minn. R. 7007.0800, subp. 2 The requirements listed below apply to FS016h (front end loader activity).1.0



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LIMIT Minn. R. 7011.0110 Opacity: less than or equal to 10 percent3.0

CD Minn. R. 7007.0800, subp. 4 Visible Emissions: The Permittee shall check FS016h and FS016i for any visibleemissions once each day of operation during daylight hours.

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SV 266 Fce 5 HE-WG #501;#502;#503

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CD Minn. R. 7017.1040, subp. 1 Installation Notification: due 60 days before installing the continuous emissionsmonitoring system. The notification shall include plans and drawings of the system.

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S/A Minn. R. 7017.1050, subp. 1 CEM Certification Test: due 120 days after Resuming Operation of Furnace 5.Follow the Performance Specifications listed in 40 CFR pt. 60, Appendix B.


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CD Minn. R. 7017.1060, subps. 1-3;Minn. R. 7017.1080, subps. 1-4


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CD Minn. R. 7017.1170, subp. 3 CEMS Daily Calibration Drift (CD) Test: The CD shall be quantified and recorded atzero (low-level) and upscale (high-level) gas concentrations at least once daily.The CEMS shall be adjusted whenever the CD exceeds twice the specification of40 CFR pt. 60, Appendix B. 40 CFR pt. 60, Appendix F, shall be used to determineout-of-control periods for CEMS. Follow the procedures in 40 CFR pt. 60, AppendixF.

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S/A Minn. R. 7017.1170, subp. 4 Cylinder Gas Audit: due before end of each calendar half-year starting 12/29/2010,except that a CGA is not required during any calendar half year in which a RATAwas performed. The CGAs shall be conducted at least three months apart but nomore than eight months apart. A CGA shall be conducted according to theprocedures in 40 CFR pt. 60, Appendix F, Section 5.1.2. If the monitored emissionunit was operated for less than 24 hours during the calendar half year, a CGA is notrequired for that calendar half year.

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S/A Minn. R. 7017.1180, subp. 1 Cylinder Gas Audit (CGA) Results Summary: due 30 days after end of eachcalendar quarter starting 07/14/2006 in which a CGA was conducted.

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S/A Minn. R. 7017.1170, subp. 5 CEMS Relative Accuracy Test Audit (RATA): due before end of each calendar yearstarting 12/29/2010. A RATA is not required in any calendar year if a RATAconducted in the previous year demonstrated a relative accuracy value of less than15 percent or if the associated emissions unit operated less than 48 hours duringthe calendar year. If the exception is used, the next RATA shall be conductedduring the first half of the following calendar year. RATAs shall be conducted atleast 3 months apart and according to 40 CFR pt. 60, Appendix F, Section 5.1.1.

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CD Minn. R. 7017.1180, subp. 2 Relative Accuracy Test Audit (RATA) Notification: due 30 days before CEMSRelative Accuracy Test Audit (RATA).

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S/A Minn. R. 7017.1180, subp. 3 Relative Accuracy Test Audit (RATA) Results Summary: due 30 days after end ofeach calendar quarter starting 07/14/2006 in which a RATA was conducted.

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S/A Minn. R. 7017.1110, subps. 1 & 2 Excess Emissions/Downtime Reports (EER's): due 30 days after end of eachcalendar quarter starting 12/29/2010. Submit Deviations Reporting Form DRF-1 asamended. The EER shall indicate all periods of monitor bypass and all periods ofexceedances of the limit including exceedances allowed by an applicable standard,i.e. during startup, shutdown, and malfunctions. The EER must be submitted even ifthere were no excess emissions, downtime or bypasses during the quarter.

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CD Minn. R. 7017.1090, subp. 1 Continuous Operation: CEMS must be operated and data recorded during allperiods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A CEMS must not be bypassed except in emergencies where failure tobypass would endanger human health, safety, or plant equipment.


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CD Minn. R. 7007.1130 Recordkeeping: The owner or operator must retain records of all CEMS monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

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CD Minn. R. 7017.1170, subp. 2 QA Plan: Develop and implement a written quality assurance plan that coverseach CEMS. The plan shall be on site and available for inspection within 30 daysafter monitor certification. The plan shall contain all of the information required by40 CFR 60, App. F, section 3.

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SV 266 Fce 5 HE-WG #501;#502;#503

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CD Minn. R. 7017.1040, subp. 1 Installation Notification: due 60 days before installing the flow monitoring system.The notification shall include plans and drawings of the system.

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CD Minn. R. 7017.1050, subp. 1 Flow Meter Certification Test: due 120 days after Resuming Operation of Furnace 5.Follow the Performance Specifications listed in 40 CFR pt. 60, Appendix B.


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CD Minn. R. 7017.1170, subp. 3 Flow Meter Daily Calibration Drift (CD) Test: The CD shall be quantified andrecorded at low and high flow rate at least once daily. The flow meter shall beadjusted whenever the CD exceeds twice the specification of 40 CFR pt. 60,Appendix B. 40 CFR pt. 60, Appendix F, shall be used to determine out-of-controlperiods for CEMS. Follow the procedures in 40 CFR pt. 60, Appendix F.

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CD Minn. R. 7017.1170, subp. 5 Flow Meter Relative Accuracy Test Audit (RATA): due before end of each calendaryear starting 12/29/2010. A RATA is not required in any calendar year if a RATAconducted in the previous year demonstrated a relative accuracy value of less than15 percent or if the associated emissions unit operated less than 48 hours duringthe calendar year. If the exception is used, the next RATA shall be conductedduring the first half of the following calendar year. RATAs shall be conducted atleast 3 months apart and according to 40 CFR pt. 60, Appendix F, Section 5.1.1.

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CD Minn. R. 7017.1180, subp. 2 Flow Meter Relative Accuracy Test Audit (RATA) Notification: due 30 days beforeFlow Meter Relative Accuracy Test Audit (RATA).

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CD Minn. R. 7017.1090, subp. 1 Continuous Operation: The flow meter must be operated and data recorded duringall periods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A flow meter must not be bypassed except in emergencies where failureto bypass would endanger human health, safety, or plant equipment.


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CD Minn. R. 7007.1130 Recordkeeping: The owner or operator must retain records of all flow monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

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CD Minn. R. 7017.1170, subp. 2 QA Plan: Develop and implement a written quality assurance plan that coverseach flow meter. The plan shall be on site and available for inspection within30 days after initial flow meter RATA. The plan shall contain all of the informationrequired by 40 CFR 60, App. F, section 3.

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Points Calculator

Points Calculator

1) AQ Facility ID No.: 07500003 Total Points 252) Facility Name: Northshore Mining Company3) Small business? y/n? n4) DQ Numbers (including all rolled) : 48895) Date of each Application Received: 8/4/20146) Final Permit No. 07500003-0107) Permit Staff Cindy Schafer8) "Work completed" in which .xls file (i.e. unit 2b, unit 1a, biofuels)?

TotalApplication Type DQ No. Qty. Points Points DetailsAdministrative Amendment 1 0Minor Amendment 4 0Applicability Request 10 0Moderate Amendment 4889 1 15 15Major Amendment 25 0Individual State Permit (not reissuance) 50 0Individual Part 70 Permit (not reissuance) 75 0

Additional PointsModeling Review 15 0

BACT Review 15 0LAER Review 15 0CAIR/Part 75 CEM analysis 10 0NSPS Review 4889 1 10 10 Subp. LLNESHAP Review 10 0Case-by-case MACT Review 20 0Netting 10 0Limits to remain below threshold 10 0Plantwide Applicability Limit (PAL) 20 0AERA review 15 0Variance request under 7000.7000 35 0Confidentiality request under 7000.1300 2 0EAW reviewPart 4410.4300, subparts 18, item A; and 29 15 0Part 4410.4300, subparts 8, items A & B; 10, items A to C; 16, items A & D; 17, items A to C & E to G; and 18, items B & C

35 0

Part 4410.4300, subparts 4; 5 items A & B; 13; 15; 16, items B & C; and 17 item D

70 0

Add'l Points 10

NOTES:

(DQ DQ#)

air emission permit no. 07500003-010 is issued to cliffs

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