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Sheet PageFacility Data 1-3Summary Criteria Pollutants 4Summary PM and Toxic Air Contaminants 5-6Operating Schedule 7Summary of Composition of Materials 8Mine Pit 9-11Ore Storage 12-14Haul Truck Travel 15-17TMF-WR 18-21Ore Handling and Processing 22-25Reagents 26-27Mercury Retort and Refining Furnace 28Space Heaters 29Emergency Generators 30Fire Pump 31Michigan PM and NSPS Limits Evaluation 32Air Dispersion Model Inputs - Criteria Pollutants 33-34Metals 227 (1)(a) 35Combustion 227 (1)(a) 36Air Dispersion Model Inputs - TACs 37Air Deposition Model Inputs Data 38Particle Size 39-42Pit Backfill 43-47

Highlights indicate revisions March 2019 Comment Response

Table of Contents

Client: Aquila Resources, Inc. Project ID.: 17A021Project:

Prepared by: CED1 Date: 02/26/19Checked by: AKM Date: 03/19/19

Back 40 Project - Menominee County, Michigan

PW_IE\Documents\Clients\Aquila Resources\0017A021\10000 Reports\Air Permit Amendment Response\Appendix A - Air Emissions Inventory REV 03-19.xlsx i

Facility Data

Overall Mine Production Oxide Plant Milling ProductionOre and waste rock production over life of mine -see Mine Plan 2018 Maximum Throughput in Year 4 292,000 tonne/yr 321,875 ton/yearLife of mine in years 7 years Daily Maximum Throughput 800 tonne/day 882 ton/dayaverage (actual) operating days 2555 days Hourly Maximum throughput 33.3 tonne/hr 37 ton/hr

Secondary breaking (5% by Rock Breaker) 1.7 tonne/hr 1.8 ton/hrAverage annual operations 365 d/y

Specific Data Description Flotation Plant Milling ProductionMaximum Throughput in Year 4 1,460,000 tonne/yr 1,609,373 ton/yearDaily MaximumThroughput 4,000 tonne/day 4,409 ton/day

Waste rock Metric Units Comments English Units Hourly Maximum Throughput 167 tonne/hr 184 ton/hr8 tonne/hr 9 ton/hr

maximum WR excavation in Year 4 13,750,000 tonne/year 15,156,763 ton/yearoperating schedule 365 day/yr Crushing/Conveying operates 7 day/wk

24 hr/day 2 shifts/day12 hr/shift24 hr/day

90% Plant Availability365 day/yr

Stockpile Closing Inventory - Year 4maximum WR excavation rate Year 4 37,671 tonne/day 41,525 ton/day Mine Plan 2018 Stockpile 1 Flotation 2,636,000 tonnes

1569.6 tonne/hr 1,730 ton/hr Mine Plan 2018 Stockpile 5 Flotation 5,989,000 tonnesStockpile 6 Oxide 7,368,000 tonnes

emulsion factor 0.3 0.6 lb emulsion/ton rock blast

Flotation Ore Mine Excavation

maximum flotation ore rate in year 4 1,896,000 tonne/year (Drilling, blasting, hauling) 2,089,980 ton/year Mine Plan 2018operating schedule 365 day/yr

24 hr/day

maximum ore rate in year 4 5,195 tonne/day (Drilling, blasting, hauling) 5,726 ton/day Mine Plan 2018 Concentrate Production (Maximum year)216.4 tonne/hr 239 ton/hr Copper Concentrate in Year 4 14,400 tonne/yr 39 tonne/day 1.6 tonne/hr

Oxide Ore Mine Excavation 15,873 ton/yr 43 ton/day 1.8 ton/hrLead Concentrate in Year 4 3,400 tonne/yr 9 tonne/day 0.4 tonne/hr

maximum oxide ore rate in year 4 301,000 tonne/yr 331,795 ton/yr Mine Plan 2018 3,748 ton/yr 10 ton/day 0.4 ton/hr825 tonne/day 909 ton/day Zinc Concentrate in Year 4 166,300 tonne/yr 456 tonne/day 19.0 tonne/hr34.4 tonne/hr 37.9 ton/hr 183,314 ton/yr 502 ton/day 20.9 ton/hr

Dore (Au + Ag) 455,427 ouncesOre emulsion factor 0.30 kg emulsion/tonne rock blast 0.6 lb emulsion/ton rock blast

Equipment SpecificationsGenerators 2

Ore moisture content - oxide ore 5 % Lycopodium, 2015. Caterpillar CAT 3512C diesel generators (2) 1500 kWOre moisture content - flotation ore 5 % Lycopodium, 2015. Fire Pump 1Waste rock moisture content 5 % Inferred from ore information Mercury Retort 1Average wind speed: 2.7 m/s ERM, 2012 6.1 mph Refining Furnace 1

References:Aquila Designed Pit Excavation Schedule, 2015. Mine pit road length - JOW 8/25/15 2842 m = 1.8 miles Note 3ERM 2012. Quarterly Air Quality and Meteorological Monitoring program Data Report. Environmental Baseline Study Back Forty Joint Venture Menominee County, Michigan . 8 quarters from July 14, 2007 to July 31, 2009.Lycopodium. Moisture content of oxide ore and sulfide ores provided in 5042 Back Forty - Water Balances for Permitting, Rev. A , June 29, 2015.

Notes:1. Basis: experience from similar projects.2. Storage Pile (SP) volume = 1/3*base x ht at bulk density of 1.6 tonne/m3 (PEA T 17.1, 17.2) h= 3 x Mass/(density x base area)

kg emulsion/tonne rock blast (National Instrument 43-101 Technical Report)

Secondary Breaking (5% by Rock Breaker)




PW_IE\Documents\Clients\Aquila Resources\0017A021\10000 Reports\Air Permit Amendment Response\Appendix A - Air Emissions Inventory REV 03-19.xlsx

Facility Data




Year 4 SPs:M - Avg tonnes

presentbase

length - m base width - more density tonne/m3 calculated height m Production Schedule for Year 4

Type 1HG main 162000 110 145 1.6 19 FS - Basecase DesignType 1LG main (assumed on West pad, as 57000 60 100 1.6 18Type 5 Tuff (LG) 499000 110 85 1.6 100 Ore Excavation unitsType 6 HG oxide 3000 80 80 1.6 1 Flotation ore 1896 000 tonnesType 6 LG oxide 611000 110 200 1.6 52 Oxide ore 530 000 tonnes

Total Ore 2426 000 tonnes

Waste Rock ExcavationTotal Expit 13750 000 tonnes

Miscellaneous NotesOnline Conversion http://www.onlineconversion.com/ Milling units

tonne (t)= 1000 kg Flotation ore 1460 000 tonneskg= 2.2 lb tonne= 1000 kg Oxide ore 290 000 tonnes

m3= 35.315 ft3 tonne= 1.10231 ton Total Ore 1750 000 tonnesm3= 1.31 yd3 kg= 2.2 lb

megawatt= 3.412 mmBtu/hr m3= 35.315 ft3 Tailings unitskilowatt= 1.3405 hp m3= 1.31 yd3 Flotation tails 1312 000 tonnes

mph= 0.44704 m/s Oxide tails 290 000 tonnesNOx 40 tpy Total Tailings 1602 000 tonnesCO 100 tpy

SOx 40 tpy Stockpile Closing Inventory unitsPM 25 tpy Stockpile 1 Flot 2636 000 tonnes

PM-10 15 tpy Stockpile 5 flot 5989 000 tonnesVOC 40 tpy Stockpile 6 Oxide 7368 000 tonnes

Pb 0.6 tpy Total Stockpile 15993 000 tonnes

Standard conditions: 70 deg F, 29.93 " Hg absoluteConcentrate ProductionMain Cu Conc 14.4 000 tonnesTotal Pb Conc 3.4 000 tonnesTotal Zn Conc 166.3 000 tonnes

3. Mine pit road length calculated using CAD tools. The maximum distance of 2842 meters was estimated by tracking the centerline of the mine pit haul road from the surface to the bottom of the pit.


Facility Data

Reagent Usage 1

Reagent Use (tonnes/yr) tonne/day tonne/hour tons/yr tonne/year tonne/hour tons/yr2

Xanthate (SIPX) 270 0.74 0.03 297 248 0.03 272297 272

MIBC (frother) 540 1.48 0.06 594 495 0.06 545594 545

Lime 51,324 141 5.9 56,456 47,047 5.37 51,752

hydrated lime 56,456 51,752

Sodium Cyanide 1,777 5 0.2 1,955 1,629 0.19 1,7921,955 1,792

Aeroflot Promoter (AP 3418A) 534 1 0.1 587 490 0.06 538587 538

Zinc Sulfate 1,415 4 0.2 1,557 1,297 0.15 1,4271,557 1,427

Copper Sulfate 2,796 8 0.3 3,076 1,350 0.15 1,4853,076 1,485

Polyacrimide 862 2 0.1 948 790 0.09 869

AN-926 VHM Polyacrylamide flocculant 948 869

Diatomaceous Earth 447 1.224 0.051 492 410 0.05 451492

Borax 3.4 0.009 0.0004 3.7 3.1 0.0004 3.43.7

Lead Nitrate 66 0.2 0.01 73 61 0.01 6773 67

Zinc Dust 266 0.7 0.03 293 244 0.03 268293 75

Sodium Metabisulfate 3,504 9.6 0.40 3,854 3,212 0.37 3,5333,854 3,533

silica 62 0.2 0.01 68 57 0.01 6368 63

Miscellaneous Regents of negligible consumption, <25 lbs on site at any time.Sodium Hydroxide (NaOH)

Litharge (PbO)Carbon (flour)

Potassium Nitrate (KNO3)Sodium Carbonate (Na2co3)

Borax Glass (Na2B4O7)Calcium Fluoride (CaF2)

Diatomaceous Earth

1. Reagent data provided in Plant Consummable Cost Summary , February, 2018 as operations cost estimate for reagent use. Usage in tonnes per year was determined by dividing the total cost per each reagent item by the cost per tonne for each item.

Maximum Use1 Actual use





Facility Data

Vehicle Information

Weight and PayloadsWeight -

tonnePayload -

tonneVolume

m3

Average Travel Weight tonne 1

Average Travel

Weight ton 1 Basis

payload material service description Notes:

Hydraulic front shovel (Cat 6018) 183.0 18.0 10.00 192.0 100% pit 14% ore muck blasted ore 1. half operations loaded, half empty.86% wr muck blasted wr 2. density calculations for payloads

Drills 100% pit 14% ore drill bulk density of waste rock (t/m3)= 2.08 Ref. a86% wr drill SG of WR (bank)= 2.70 Ref. a

Haul truck (Basis: Cat 777G) 164.6 91.0 64.00 210.1 231.6 75% pit Ore/WR Haul from pit to storage locations SG of ore (bank) = 3.40 Ref. bcalculated bulk density of ore (t/m3)= 2.62 calculated based on proportion

dry bulk density of tailings (t/m3)= 2.30 used in TMF designWheel loader - Cat 990H 79.0 15.0 9.20 86.5 95.3 10% pit 100% ore ore loading in pit estimated bulk density of soils (g/cm3) = 1.33 Ref. c

90% plant 100% ore ore loading at storage piles estimated bulk density of concentrate (g/cm3) = 1.90 Ref. dTrackdozer CAT D8T 40.0 60% pit Ore/WR material management in pit 1 tonne = 1.10231 ton

40% WR Storage 100% wr material management in TWRMFGrader CAT 140M3 20.2 70% pit Ore/WR grades roadways as needed 4. Assume that reagent transport has the same constraints as concentrate transportation.

Referencesa Golder - MJV 8.18.15, geotechnical properties design basis table

Water Cart 20kl b Personal conversation, Eric Quigley development of ore excavation schedule, July 2015. (JSL/MCC)c U.S. Department of Agriculture Natural Resources Conservation Service, Soil Quality Indicators publication on typical bulk density of soils.

Concentrate Transport Truck 3 73.0 48.0 97.0 106.9 100% Mill 100% Conc't Transport Concentrate off-site d Typical bulk density for copper concentrate, Macawber Engineering.

Reagent Transport Truck 4 73.0 48.0 97.0 106.9 100% Mill100% Reagent Transport Reagents on-site

Mining operations rely on a variety of vehicles for hauling and managing large quantities of materials. Example vehicle basis are from Caterpillar. Vehicle trips contributing to emissions in order of contribution: haul truck for ore and waste rock; wheel loaders and shovels for managing materials in the pit and stockpiles; track dozers for surface management; loaders for loading haul trucks.

3. Assume concentrate will be transported off-site using bulk product haul truck. Typical tare weight for product haul truck is expected to be 50 tons, with payload capacity of 48 tons. This payload weight was used to be in compliance with Michigan weight limits during certain winter months.


Summary Criteria Pollutants

Maximum Controlled Facility Emissions for Criteria Pollutants1 Estimated Actual Facility Emissions for Criteria Pollutants0.36 0.13 0.04

Criteria Pollutant Emissions in ton/year Criteria Pollutant Emissions in ton/yearStack Emission Source NOx SO2 CO VOC Lead PM PM10 PM2.5 NOx SO2 CO VOC Lead PM PM10 PM2.5

Stack EmissionsSV-01A Flotation Ore Primary Crushing 2.13E-03 0.08 0.03 0.01 1.95E-03 0.07 0.03 0.01SV-01B Flotation Ore Mill Feed Transfer System 0.02 0.01 0.003 0.02 0.01 0.00SV-02A Oxide Ore Primary Crushing 6.17E-04 0.013 0.005 0.002 5.66E-04 0.01 0.00 0.00SV-02B Oxide Ore Secondary/Tertiary Crushing 0.24 0.09 0.026 0.22 0.08 0.02SV-02C Oxide Ore Mill Feed Transfer System 0.005 0.002 0.0005 0.00 0.00 0.00SV-03 Mercury RetortSV-04 Refinery Furnace 0.159 0.133 0.096 0.00 0.000 0.00 0.00 0.159 0.133 0.096SV-05 Lime Silo (reagent) 0.03 0.01 0.003 0.03 0.01 0.00SV-06A Emergency Generator A 6.07 0.006 0.53 0.13 0.03 0.03 0.03 3.06 0.003 0.27 0.067 0.017 0.017 0.017SV-06B Emergency Generator B 6.07 0.006 0.53 0.13 0.03 0.03 0.03 3.06 0.003 0.27 0.067 0.017 0.017 0.017SV-07 Space Heaters LPG Boilers 1.42 0.009 0.82 0.11 0.08 0.08 0.08 1.06 0.007 0.61 0.082 0.057 0.057 0.057SV-08 Fire Pump Engine 0.54 0.04 0.12 0.04 0.04 0.04 0.04 0.54 0.04 0.12 0.04 0.04 0.04 0.04

Total Stack Emissions 14.09 0.06 2.00 0.42 0.00 0.7 0.5 0.3 7.72 0.05 1.27 0.26 0.00 0.6 0.4 0.3

Fugitive EmissionsMine Pit Fugitive Emissions 44.83 5.27 176.66 1.97E-02 44.88 13.93 1.32 44.83 5.27 176.66 1.81E-02 42.33 13.38 1.26 Drill 1.38 0.70 0.21 1.38 0.70 0.21 Blast 44.83 5.27 176.66 12.81 6.66 0.38 44.83 5.27 176.66 12.81 6.66 0.38 Material Handling 2.97 1.40 0.21 2.72 1.29 0.20 Vehicle Travel 27.73 5.16 0.52 25.42 4.73 0.47

Ore Storage Piles and Transfer 2.87E-01 13.01 4.03 0.92 2.63E-01 11.93 3.69 0.84 Wind Erosion - Storage Pile A 6.16 1.85 0.55 6.16 1.85 0.55 Wind Erosion - Storage Pile B 1.50 0.45 0.14 1.50 0.45 0.14 Material Handling (at Store Piles & ROM) 2.26 1.07 0.16 2.07 0.98 0.15 Haul Truck & FE Loader Travel 3.09 0.66 0.07 2.83 0.61 0.06

Ore Handling and Processing 9.50E-03 0.36 0.13 0.04 8.71E-03 0.33 0.12 0.04 Flotation Ore Primary Crushing 0.15 0.06 0.02 0.14 0.05 0.02 Flotation Ore Mill Feed System 0.05 0.02 0.01 0.05 0.02 0.01 Mill Feed to SAG Mill 0.00 0.00 0.00 0.00 0.00 0.00 Oxide Ore Primary Crushing 0.03 0.01 0.00 0.03 0.01 0.00 Oxide Ore Secondary/Tertiary Crushing 0.05 0.02 0.01 0.04 0.02 0.00 Oxide Ore Mill Transfer System 0.01 0.00 0.00 0.01 0.00 0.00 Oxide Ore Ball Mill Transfer 0.05 0.02 0.01 0.05 0.02 0.00

Concentrate Packaging 0.018 0.007 0.002 0.02 0.01 0.00

Tailings and Waste Rock Management 6.42E-03 22.4 6.7 1.2 5.89E-03 21.0 6.2 1.1 Wind Erosion - TMF 5.64 1.69 0.51 5.64 1.69 0.51 Material Transfer and WR Plcmnt 16.72 4.96 0.65 15.32 4.55 0.60

On-Site Truck Travel 3 1.64E-04 45.22 9.67 0.97 1.50E-04 38.00 8.13 0.81

Reagent - Material Handling 0.015 0.016 0.008 0.003 0.014 0.007 0.002

Total Fugitive Emissions 44.83 5.27 176.66 0.02 0.32 125.85 34.43 4.41 44.83 5.27 176.66 0.00 0.30 113.56 31.58 4.06

Maximum Controlled Facility Emissions 1 58.92 5.33 178.66 0.43 0.33 126.58 34.89 4.73

Potential to Emit 2 14.09 0.06 2.00 0.42 0.003 0.73 0.46 0.32





Summary Criteria Pollutants




Notes:1. Maximum controlled facility emissions are all site emissions (including fugitive emissions) after applying collection and control efficiencies based on maximum operating schedule. Normal/actual emissions are based on the normal/actual operating schedule. 2. Potential to Emit (PTE) for this facility is the stack emissions with no fugitives. 40 CFR 60 Subpart LL (NSPS) for metallic minerals processing is applicable to this facility. This NSPS (metallic mining) was developed after 1980 and since this facility is not subject to federal Maximum Achievable Control Technology (MACT) standards, fugitive dust is not part of PTE. PTE is based on controlled emissions since operation of emission control equipment will be a legally enforceable requirement of the operation. PTE for hazardous air pollutants (HAPs) is based on both stack and fugitive emissions per R 336.1116 (m).3. On-Site Road emissions include fugitive emissions from surface roadway travel, no tailpipe emissions. It includes:

- Ore Trucks Unpaved Road to Storage Piles - Waste Rock Truck transporting waste rock to North Waste Rock Facility - Waste Rock Truck transporting waste rock to South Waste Rock Facility - Waste Rock Truck transporting waste rock to Tailings Management Facility (for berm construction) - Concentrate Truck transporting combined Concentrates on Unpaved Road from Concentrate Handling Facility to East Mine Entrance Gate


Summary PM and Toxic Air Contaminants

ore

waste rocktailscopper concentratezinc concentratelead concentratesoil

Maximum Controlled Facility Emissions for PM and Toxic Air Contaminants (lb/hr)Actual Emissions (lb/year & ton/year) Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Cerium Chromium Cobalt Copper Iron Lead Lithium Magnesium Manganese 7 Mercury Molybdenum Nickel Phosphorus Selenium Silver Strontium Sulfur Thallium Tin Yttrium Zinc

Al Sb As Ba Be Cd Ca Ce Cr Co Cu Fe Pb Li Mg Mn Hg Mo Ni P Se Ag Sr S Tl Sn Y Znore 7.66 0.0183 0.297 0.048 0.001 0.064 1.594 0 0.064 0.002 0.664 18.79 2.9 0.003 1.2 0.1 0.0153 0.012 0.003 3.81E-02 0.001 0.031 0.016 28.8 0.002 0.004 0.001 17.9

waste rock (wr) 0 0.00067 0.02213 0.07315 0.00000 0.00033 0 0.006 0.002 0.0005 0.008 0 0.02 0.00 0.00 0.00 0.0001 0.0002 0.0004 0.00E+00 0.0001 0.0002 0.009 2.32 0.0003 0.0005 0.0022 0.13tails 0 0.0004 0.1470 0.0110 0.0000 0.0019 0 0.002 0.001 0.0003 0.785 0 0.06 0.00 0.00 0.00 0.000 0.003 0.003 0.00E+00 0.000 0.002 0.004 39.10 0.0002 0.0005 0.001 0.34

Cu conc. 0.03 0.0752 0.0266 0.005 0.00005 0.0153 0.1 0.0005 0.0150 0.0003 30.2000 30 3.35 0.00 0.03 0.01 0.01 0.00 0.01 0.01 0.00 0.04 0.00 29.90 0.00 0.05 0.00 2.53Zn conc. 0.040 0.00259 0.02100 0.00500 0.00005 0.32800 0.190 0.0002 0.0050 0.0001 0.6170 10.8 0.27 0.0002 0.02 0.14 0.04 0.002 0.003 0.01 0.004 0.01 0.0003 24.60 0.0002 0.0019 0.0001 56.10Pb conc. 0.040 0.24000 0.08000 0.00500 0.00005 0.32800 0.190 0.0005 0.0150 0.0003 10.0000 30.0 38.70 0.0002 0.03 0.14 0.04 0.003 0.010 0.01 0.004 0.08 0.0003 29.90 0.0010 0.0535 0.0002 4.86

PM PM10 PM2.5 soil 0.573 0 0.00019 0.00331 0 0 0 0 0.00112 0.00029 0.00045 1.18 0.0004 0.0000 0.1030 0.0228 8.90E-07 0.0000 0.0008 0.0340 0.0000 0.0000 0.0000 0.0045 0.0000 0.0000 0.0000 0.0018

Mine Pit Fugitive Emissions (EUFUGITIVE)(Maximum 1-hr)11 1 Drilling - ore (fugitive) 0.087 0.044 0.013 lb/hr ore 6.64E-03 1.59E-05 2.58E-04 4.14E-05 9.85E-07 5.54E-05 1.38E-03 0.00E+00 5.54E-05 1.75E-06 5.76E-04 1.63E-02 2.56E-03 2.63E-06 1.08E-03 3.70E-05 1.33E-05 1.06E-05 3.03E-06 3.30E-05 6.59E-07 2.69E-05 1.41E-05 2.49E-02 2.10E-06 3.63E-06 1.20E-06 1.56E-02

1 Drilling - waste rock (fugitive) 0.543 0.277 0.081 lb/hr wr 0.00E+00 3.65E-06 1.20E-04 3.97E-04 0.00E+00 1.81E-06 0.00E+00 3.35E-05 1.04E-05 2.71E-06 4.31E-05 0.00E+00 1.07E-04 0.00E+00 0.00E+00 0.00E+00 5.79E-07 9.04E-07 2.31E-06 0.00E+00 3.59E-07 9.23E-07 4.73E-05 1.26E-02 1.78E-06 2.69E-06 1.21E-05 6.87E-04hr/yr 4380

(Average 1-hr) 1 Drilling - ore (fugitive) 0.043 0.022 0.007 lb/hr ore 3.32E-03 7.96E-06 1.29E-04 2.07E-05 4.93E-07 2.77E-05 6.91E-04 0.00E+00 2.77E-05 8.76E-07 2.88E-04 8.15E-03 1.28E-03 1.32E-06 5.41E-04 3.63E-05 6.64E-06 5.28E-06 1.51E-06 1.65E-05 3.29E-07 1.34E-05 7.04E-06 1.25E-02 1.05E-06 1.82E-06 5.98E-07 7.78E-031 Drilling - waste rock (fugitive) 0.271 0.138 0.041 lb/hr wr 0.00E+00 1.82E-06 6.01E-05 1.99E-04 0.00E+00 9.05E-07 0.00E+00 1.67E-05 5.18E-06 1.36E-06 2.15E-05 0.00E+00 5.34E-05 0.00E+00 0.00E+00 0.00E+00 2.89E-07 4.52E-07 1.16E-06 0.00E+00 1.79E-07 4.61E-07 2.37E-05 6.31E-03 8.88E-07 1.35E-06 6.07E-06 3.43E-04

(Average 1-hr) 2 Blasting - ore (fugitive) 0.4 0.2 0.012 lb/hr ore 3.09E-02 7.39E-05 1.20E-03 1.92E-04 4.58E-06 2.57E-04 6.42E-03 0.00E+00 2.57E-04 8.14E-06 2.68E-03 7.57E-02 1.19E-02 1.22E-05 5.03E-03 1.75E-04 6.17E-05 4.90E-05 1.41E-05 1.53E-04 3.06E-06 1.25E-04 6.54E-05 1.16E-01 9.77E-06 1.69E-05 5.56E-06 7.23E-022 Blasting waste rock (fugitive) 2.5 1.3 0.076 lb/hr wr 0.00E+00 1.69E-05 5.58E-04 1.84E-03 0.00E+00 8.41E-06 0.00E+00 1.56E-04 4.81E-05 1.26E-05 2.00E-04 0.00E+00 4.96E-04 0.00E+00 0.00E+00 0.00E+00 2.69E-06 4.20E-06 1.07E-05 0.00E+00 1.67E-06 4.29E-06 2.20E-04 5.86E-02 8.25E-06 1.25E-05 5.64E-05 3.19E-03

hr/yr 365

(10% of Maximum 1-hr)10 2 Blasting - ore (fugitive) 0.97 0.50 0.03 lb/hr ore 7.41E-02 1.77E-04 2.88E-03 4.61E-04 1.10E-05 6.18E-04 1.54E-02 0.00E+00 6.18E-04 1.95E-05 6.42E-03 1.82E-01 2.85E-02 2.93E-05 1.21E-02 8.09E-04 1.48E-04 1.18E-04 3.38E-05 3.68E-04 7.35E-06 3.00E-04 1.57E-04 2.78E-01 2.35E-05 4.05E-05 1.33E-05 1.73E-012 Blasting waste rock (fugitive) 6.05 3.15 0.18 lb/hr wr 0.00E+00 4.07E-05 1.34E-03 4.43E-03 0.00E+00 2.02E-05 0.00E+00 3.73E-04 1.15E-04 3.02E-05 4.80E-04 0.00E+00 1.19E-03 0.00E+00 0.00E+00 0.00E+00 6.45E-06 1.01E-05 2.58E-05 0.00E+00 4.00E-06 1.03E-05 5.28E-04 1.41E-01 1.98E-05 3.00E-05 1.35E-04 7.66E-03

(Maximum 1-hr)11 2 Blasting - ore (fugitive) 9.7 5.0 lb/hr ore 7.41E-01 1.77E-03 2.88E-02 4.61E-03 1.10E-04 6.18E-03 1.54E-01 0.00E+00 6.18E-03 1.95E-04 6.42E-02 1.82E+00 2.85E-01 2.93E-04 1.21E-01 8.09E-03 1.48E-03 1.18E-03 3.38E-04 3.68E-03 7.35E-05 3.00E-03 1.57E-03 2.78E+00 2.35E-04 4.05E-04 1.33E-04 1.73E+002 Blasting waste rock (fugitive) 60.5 31.5 lb/hr wr 0.00E+00 4.07E-04 1.34E-02 4.43E-02 0.00E+00 2.02E-04 0.00E+00 3.73E-03 1.15E-03 3.02E-04 4.80E-03 0.00E+00 1.19E-02 0.00E+00 0.00E+00 0.00E+00 6.45E-05 1.01E-04 2.58E-04 0.00E+00 4.00E-05 1.03E-04 5.28E-03 1.41E+00 1.98E-04 3.00E-04 1.35E-03 7.66E-02

3 Material Handling - ore (fugitive) 0.093 0.044 0.007 lb/hr ore 7.16E-03 1.71E-05 2.78E-04 4.46E-05 1.06E-06 5.97E-05 1.49E-03 0.00E+00 5.97E-05 1.89E-06 6.20E-04 1.76E-02 2.75E-03 2.83E-06 1.17E-03 3.70E-05 1.43E-05 1.14E-05 3.26E-06 3.56E-05 7.10E-07 2.89E-05 1.52E-05 2.69E-02 2.27E-06 3.91E-06 1.29E-06 1.68E-023 Mat'l Handling - waste rock (fugitive) 0.585 0.277 0.042 lb/hr wr 0.00E+00 3.93E-06 1.29E-04 4.28E-04 0.00E+00 1.95E-06 0.00E+00 3.61E-05 1.12E-05 2.92E-06 4.64E-05 0.00E+00 1.15E-04 0.00E+00 0.00E+00 0.00E+00 6.24E-07 9.74E-07 2.49E-06 0.00E+00 3.87E-07 9.94E-07 5.10E-05 1.36E-02 1.91E-06 2.90E-06 1.31E-05 7.40E-04

hr/yr 80304 Vehicle Travel - ore (fugitive) 0.9 0.2 0.02 lb/hr soil 5.00E-03 0.00E+00 1.66E-06 2.89E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 9.77E-06 2.53E-06 3.92E-06 1.03E-02 3.23E-06 0.00E+00 8.98E-04 3.70E-05 7.76E-09 0.00E+00 6.63E-06 2.97E-04 0.00E+00 2.01E-08 0.00E+00 3.88E-05 0.00E+00 0.00E+00 0.00E+00 1.60E-05

4 Vehicle Travel - waste rock (fugitive) 5.5 1.0 0.1 lb/hr soil 3.13E-02 0.00E+00 1.04E-05 1.81E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.11E-05 1.58E-05 2.46E-05 6.44E-02 2.02E-05 0.00E+00 5.62E-03 2.32E-04 4.86E-08 0.00E+00 4.15E-05 1.86E-03 0.00E+00 1.26E-07 0.00E+00 2.43E-04 0.00E+00 0.00E+00 0.00E+00 9.99E-05hr/yr 8030

Total Mine Pit Emissions (fugitive)(include Average 1-hr drilling emissions and 10% of Max 1-hr

blasting) 14.3 5.3 0.42 lb/hr 1.21E-01 2.49E-04 4.82E-03 5.79E-03 1.25E-05 7.28E-04 1.76E-02 4.26E-04 9.08E-04 7.52E-05 7.91E-03 2.82E-01 3.39E-02 3.35E-05 2.03E-02 1.15E-03 1.76E-04 1.46E-04 1.16E-04 2.57E-03 1.30E-05 3.54E-04 7.81E-04 4.78E-01 4.94E-05 8.05E-05 1.70E-04 2.07E-01(include Average 1-hr blasting and drilling emissions) 10.9 3.5 0.40 lb/hr 7.76E-02 1.22E-04 2.36E-03 2.94E-03 6.13E-06 3.56E-04 8.60E-03 2.08E-04 4.80E-04 4.61E-05 3.88E-03 1.76E-01 1.66E-02 1.64E-05 1.33E-02 5.17E-04 8.63E-05 7.13E-05 8.13E-05 2.36E-03 6.33E-06 1.73E-04 3.82E-04 2.34E-01 2.41E-05 3.93E-05 8.29E-05 1.01E-01(include Average 1-hr blasting and drilling emissions) 30.05 7.0 0.89 <--ton/yr - actual --> 1.95E-01 1.44E-04 2.83E-03 4.07E-03 7.26E-06 4.21E-04 1.02E-02 2.47E-04 7.69E-04 1.07E-04 4.67E-03 4.20E-01 1.97E-02 1.94E-05 3.41E-02 1.34E-03 1.02E-04 8.43E-05 2.32E-04 8.88E-03 7.49E-06 2.05E-04 4.52E-04 2.78E-01 2.86E-05 4.66E-05 9.81E-05 1.20E-01

lb per year toxics - actual 3.89E+02 0.3 5.7 8.1 0.0 0.8 20.4 0.5 1.5 0.2 9.3 839.8 39.4 0.0 68.3 2.7 0.2 0.2 0.5 17.8 0.0 0.4 0.9 555.4 0.1 0.1 0.2 240.1

Ore Storage Piles and Transfer (EUFUGITIVE)1 wind erosion east ore storage pad 1.41 0.42 0.13 lb/hr ore 1.08E-01 2.58E-04 4.18E-03 6.71E-04 1.60E-05 8.98E-04 2.24E-02 0.00E+00 8.99E-04 2.84E-05 9.34E-03 2.64E-01 4.15E-02 4.27E-05 1.76E-02 3.53E-04 2.15E-04 1.71E-04 4.91E-05 5.36E-04 1.07E-05 4.36E-04 2.28E-04 4.05E-01 3.41E-05 5.89E-05 1.94E-05 2.52E-01

hr/yr 87601 wind erosion west ore storage pad 0.34 0.10 0.03 lb/hr ore 2.62E-02 6.28E-05 1.02E-03 1.63E-04 3.89E-06 2.19E-04 5.46E-03 0.00E+00 2.19E-04 6.92E-06 2.27E-03 6.44E-02 1.01E-02 1.04E-05 4.27E-03 8.60E-05 5.25E-05 4.17E-05 1.20E-05 1.30E-04 2.60E-06 1.06E-04 5.56E-05 9.85E-02 8.31E-06 1.43E-05 4.72E-06 6.14E-02

hr/yr 87602 material handling at east & west storage pads 0.33 0.16 0.024 lb/hr ore 2.52E-02 6.03E-05 9.78E-04 1.57E-04 3.74E-06 2.10E-04 5.24E-03 0.00E+00 2.10E-04 6.64E-06 2.18E-03 6.18E-02 9.69E-03 9.97E-06 4.10E-03 1.30E-04 5.04E-05 4.00E-05 1.15E-05 1.25E-04 2.50E-06 1.02E-04 5.34E-05 9.46E-02 7.98E-06 1.38E-05 4.54E-06 5.90E-02

hr/yr 80303 material handling at ROM 0.19 0.09 0.01 lb/hr ore 1.44E-02 3.44E-05 5.58E-04 8.94E-05 2.13E-06 1.20E-04 2.99E-03 0.00E+00 1.20E-04 3.79E-06 1.24E-03 3.52E-02 5.52E-03 5.69E-06 2.34E-03 7.42E-05 2.87E-05 2.28E-05 6.54E-06 7.14E-05 1.42E-06 5.81E-05 3.04E-05 5.39E-02 4.55E-06 7.85E-06 2.59E-06 3.36E-02

hr/yr 80304. Haul Truck & FE loader at Store Pads & ROM These two vehicle traffic emissions are inclued in Haul Truck Travel calcs below (rows 105, 107)

Total Ore Pile Emissions (fugitive) 2.27 0.77 0.19 lb/hr 1.73E-01 4.16E-04 6.74E-03 1.08E-03 2.57E-05 1.45E-03 3.61E-02 0.00E+00 1.45E-03 4.57E-05 1.50E-02 4.26E-01 6.68E-02 6.87E-05 2.83E-02 6.43E-04 3.47E-04 2.76E-04 7.91E-05 8.63E-04 1.72E-05 7.02E-04 3.68E-04 6.52E-01 5.50E-05 9.49E-05 3.13E-05 4.06E-019.73 3.28 0.84 ton/yr - actual 7.45E-01 1.79E-03 2.90E-02 4.64E-03 1.11E-04 6.22E-03 1.55E-01 0.00E+00 6.22E-03 1.97E-04 6.46E-02 1.83E+00 2.87E-01 2.95E-04 1.21E-01 2.74E-03 1.49E-03 1.18E-03 3.40E-04 3.71E-03 7.40E-05 3.02E-03 1.58E-03 2.80E+00 2.36E-04 4.08E-04 1.34E-04 1.75E+00

lb per year toxics - actual 1.49E+03 3.6 57.9 9.3 0.22 12.4 310.2 0.0 12.4 0.4 129.3 3657.9 573.7 0.6 243.0 5.5 3.0 2.4 0.7 7.4 0.1 6.0 3.2 5599.6 0.5 0.8 0.3 3491.5

Ore Handling and Processing1 Flotation Ore Primary Crushing (SV-01A) 0.018 0.01 0.002 lb/hr ore 1.38E-03 3.30E-06 5.35E-05 8.58E-06 2.04E-07 1.15E-05 2.87E-04 0.00E+00 1.15E-05 3.63E-07 1.19E-04 3.38E-03 5.30E-04 5.46E-07 2.24E-04 5.72E-06 2.75E-06 2.19E-06 6.28E-07 6.85E-06 1.37E-07 5.57E-06 2.92E-06 5.17E-03 4.36E-07 7.53E-07 2.48E-07 3.23E-03

hr/yr 8030

2 Flotation Ore Mill Feed Transfer System (SV-01B) 0.005 0.002 0.0006 lb/hr ore 3.99E-04 9.57E-07 1.55E-05 2.49E-06 5.93E-08 3.33E-06 8.31E-05 0.00E+00 3.33E-06 1.05E-07 3.46E-05 9.80E-04 1.54E-04 1.58E-07 6.51E-05 1.60E-06 7.99E-07 6.34E-07 1.82E-07 1.99E-06 3.96E-08 1.62E-06 8.46E-07 1.50E-03 1.27E-07 2.18E-07 7.20E-08 9.35E-04hr/yr 8030

3 Oxide Ore Primary Crushing (SV-02A) 0.003 0.001 0.0004 lb/hr ore 2.35E-04 5.64E-07 9.14E-06 1.47E-06 3.49E-08 1.96E-06 4.90E-05 0.00E+00 1.96E-06 6.21E-08 2.04E-05 5.78E-04 9.06E-05 9.33E-08 3.84E-05 9.84E-07 4.71E-07 3.74E-07 1.07E-07 1.17E-06 2.34E-08 9.52E-07 4.99E-07 8.84E-04 7.46E-08 1.29E-07 4.24E-08 5.51E-048030

4 Oxide Ore Secondary/Tertiary Crushing (SV-02B) 0.054 0.020 0.006 lb/hr ore 4.16E-03 9.95E-06 1.61E-04 2.59E-05 6.16E-07 3.47E-05 8.65E-04 0.00E+00 3.47E-05 1.10E-06 3.60E-04 1.02E-02 1.60E-03 1.65E-06 6.77E-04 1.67E-05 8.31E-06 6.60E-06 1.89E-06 2.07E-05 4.12E-07 1.68E-05 8.81E-06 1.56E-02 1.32E-06 2.27E-06 7.48E-07 9.73E-038030

5 Oxide Ore Mill Feed Transfer System (SV-02C) 0.001 0.0004 0.0001 lb/hr ore 8.08E-05 1.93E-07 3.14E-06 5.03E-07 1.20E-08 6.74E-07 1.68E-05 0.00E+00 6.74E-07 2.13E-08 7.00E-06 1.98E-04 3.11E-05 3.20E-08 1.32E-05 3.24E-07 1.62E-07 1.28E-07 3.68E-08 4.01E-07 8.01E-09 3.27E-07 1.71E-07 3.03E-04 2.56E-08 4.42E-08 1.45E-08 1.89E-048030

6 Crushing fugitive emission totals (fugitive) 0.0782 0.0291 0.0087 lb/hr ore 5.99E-03 1.43E-05 2.33E-04 3.73E-05 8.88E-07 4.99E-05 1.25E-03 0.00E+00 4.99E-05 1.58E-06 5.19E-04 1.47E-02 2.30E-03 2.37E-06 9.76E-04 2.43E-05 1.20E-05 9.51E-06 2.73E-06 2.98E-05 5.94E-07 2.42E-05 1.27E-05 2.25E-02 1.90E-06 3.27E-06 1.08E-06 1.40E-02EUCPFUGITUVE hr/yr 8030

7 Flotation Plant Copper Concentrate Packaging Operations (fugitive) 0.000 0.0001 0.0000 lb/hr Cu conc. 9.78E-08 2.45E-07 8.68E-08 1.63E-08 1.63E-10 4.99E-08 3.26E-07 1.66E-09 4.89E-08 9.78E-10 9.85E-05 9.78E-05 1.09E-05 6.52E-10 9.78E-08 8.37E-09 1.73E-08 9.98E-09 3.29E-08 3.26E-08 6.52E-09 1.16E-07 9.78E-10 9.75E-05 3.13E-09 1.74E-07 6.52E-10 8.25E-06

EUCONCPACKAGING hr/yr 80307 Flotation Plant Zn Concentrate Packaging

Operations (fugitive) 0.004 0.001 0.0004 lb/hr Zn conc. 1.51E-06 9.76E-08 7.91E-07 1.88E-07 1.88E-09 1.24E-05 7.16E-06 6.03E-09 1.88E-07 3.77E-09 2.32E-05 4.07E-04 1.02E-05 7.53E-09 7.53E-07 1.86E-06 1.39E-06 6.97E-08 1.28E-07 3.77E-07 1.51E-07 2.01E-07 1.13E-08 9.27E-04 9.04E-09 7.16E-08 3.77E-09 2.11E-03EUCONCPACKAGING hr/yr 8030

7 Flotation Plant Pb Concentrate Packaging Operations (fugitive) 0.0001 0.0000 0.0000 lb/hr Pb conc. 4.24E-08 2.54E-07 8.47E-08 5.29E-09 5.29E-11 3.47E-07 2.01E-07 5.40E-10 1.59E-08 3.18E-10 1.06E-05 3.18E-05 4.10E-05 2.12E-10 3.18E-08 5.24E-08 3.92E-08 3.24E-09 1.07E-08 1.06E-08 4.24E-09 8.31E-08 3.18E-10 3.17E-05 1.02E-09 5.67E-08 2.12E-10 5.15E-06

EUCONCPACKAGING hr/yr 8030

Total stack emissions associated 0.08 0.03 0.009 lb/hr 6.25E-03 1.50E-05 2.43E-04 3.89E-05 9.27E-07 5.21E-05 1.30E-03 0.00E+00 5.21E-05 1.65E-06 5.42E-04 1.53E-02 2.40E-03 2.48E-06 1.02E-03 2.54E-05 1.25E-05 9.92E-06 2.85E-06 3.11E-05 6.20E-07 2.53E-05 1.32E-05 2.35E-02 1.98E-06 3.42E-06 1.13E-06 1.46E-02with Ore Handling and Processing 0.3 0.1 0.0 ton/yr - actual 2.51E-02 6.01E-05 9.74E-04 1.56E-04 3.72E-06 2.09E-04 5.22E-03 0.00E+00 2.09E-04 6.61E-06 2.18E-03 6.15E-02 9.65E-03 9.94E-06 4.09E-03 1.02E-04 5.02E-05 3.98E-05 1.14E-05 1.25E-04 2.49E-06 1.01E-04 5.32E-05 9.42E-02 7.95E-06 1.37E-05 4.52E-06 5.87E-02

Total fugitive emissions associated 0.08 0.03 0.01 lb/hr 5.99E-03 1.49E-05 2.33E-04 3.75E-05 8.90E-07 6.27E-05 1.25E-03 8.23E-09 5.02E-05 1.58E-06 6.51E-04 1.52E-02 2.37E-03 2.38E-06 9.76E-04 2.62E-05 1.34E-05 9.59E-06 2.90E-06 3.02E-05 7.55E-07 2.46E-05 1.27E-05 2.35E-02 1.91E-06 3.58E-06 1.08E-06 1.61E-02with Ore Handling and Processing 0.3 0.1 0.0 ton/yr - actual 2.40E-02 6.00E-05 9.37E-04 1.51E-04 3.57E-06 2.52E-04 5.03E-03 3.30E-08 2.02E-04 6.36E-06 2.62E-03 6.11E-02 9.50E-03 9.56E-06 3.92E-03 1.05E-04 5.39E-05 3.85E-05 1.16E-05 1.21E-04 3.03E-06 9.88E-05 5.10E-05 9.45E-02 7.67E-06 1.44E-05 4.35E-06 6.48E-02

lb per year toxics - actual 4.91E-02 1.20E-04 1.91E-03 3.07E-04 7.30E-06 4.61E-04 1.03E-02 3.30E-08 4.11E-04 1.30E-05 4.79E-03 1.23E-01 1.92E-02 1.95E-05 8.01E-03 2.07E-04 1.04E-04 7.84E-05 2.31E-05 2.46E-04 5.52E-06 2.00E-04 1.04E-04 1.89E-01 1.56E-05 2.81E-05 8.87E-06 1.24E-01

Tailings and Waste Rock Management (EUTMFWR)1 Wind Erosion TMF (fugitive) 1.29 0.39 0.12 lb/hr tails 0.00E+00 5.12E-06 1.89E-03 1.41E-04 0.00E+00 2.41E-05 0.00E+00 1.96E-05 1.29E-05 3.22E-06 1.01E-02 0.00E+00 7.78E-04 0.00E+00 0.00E+00 0.00E+00 1.49E-06 4.12E-05 3.22E-05 0.00E+00 1.29E-06 3.02E-05 4.96E-05 5.04E-01 3.09E-06 6.44E-06 8.89E-06 4.34E-03

hr/yr 87605.64 1.69 0.51 ton/yr - actual 0.00E+00 2.24E-05 8.30E-03 6.18E-04 0.00E+00 1.06E-04 0.00E+00 8.58E-05 5.64E-05 1.41E-05 4.43E-02 0.00E+00 3.41E-03 0.00E+00 0.00E+00 0.00E+00 6.52E-06 1.81E-04 1.41E-04 0.00E+00 5.64E-06 1.32E-04 2.17E-04 2.21E+00 1.35E-05 2.82E-05 3.89E-05 1.90E-02

lb per year toxics - actual 0.00E+00 4.48E-02 1.66E+01 1.24E+00 0.00E+00 2.11E-01 0.00E+00 1.72E-01 1.13E-01 2.82E-02 8.86E+01 0.00E+00 6.82E+00 0.00E+00 0.00E+00 0.00E+00 1.30E-02 3.61E-01 2.82E-01 0.00E+00 1.13E-02 2.64E-01 4.35E-01 4.41E+03 2.71E-02 5.64E-02 7.79E-02 3.80E+012 Material Transfer and Placement of Waste Rock 1.16 0.55 0.08 lb/hr wr 0.00E+00 7.77E-06 2.56E-04 8.46E-04 0.00E+00 3.86E-06 0.00E+00 7.14E-05 2.21E-05 5.78E-06 9.17E-05 0.00E+00 2.27E-04 0.00E+00 0.00E+00 0.00E+00 1.23E-06 1.93E-06 4.92E-06 0.00E+00 7.65E-07 1.97E-06 1.01E-04 2.69E-02 3.78E-06 5.73E-06 2.58E-05 1.46E-03

(fugitive) hr/yr 80303 Vehicle Travel on Waste Rock (fugitive) 1.84 0.34 0.03 lb/hr wr 0.00E+00 1.24E-05 4.08E-04 1.35E-03 0.00E+00 6.15E-06 0.00E+00 1.14E-04 3.52E-05 9.22E-06 1.46E-04 0.00E+00 3.63E-04 0.00E+00 0.00E+00 0.00E+00 1.97E-06 3.07E-06 7.85E-06 0.00E+00 1.22E-06 3.14E-06 1.61E-04 4.29E-02 6.03E-06 9.14E-06 4.12E-05 2.33E-03

hr/yr 80304. TMF Waste Rock Placement & Travel 0.82 0.24 0.03 lb/hr wr 0.00E+00 5.48E-06 1.81E-04 5.97E-04 0.00E+00 2.72E-06 0.00E+00 5.03E-05 1.56E-05 4.08E-06 6.47E-05 0.00E+00 1.61E-04 0.00E+00 0.00E+00 0.00E+00 8.70E-07 1.36E-06 3.47E-06 0.00E+00 5.40E-07 1.39E-06 7.11E-05 1.90E-02 2.67E-06 4.04E-06 1.82E-05 1.03E-03

(fugitive) hr/yr 8030Total Waste Rock Placement & Travel Emissions (2-

4) (fugitive) 3.8 1.1 0.1 lb/hr 0.00E+00 2.56E-05 8.44E-04 2.79E-03 0.00E+00 1.27E-05 0.00E+00 2.36E-04 7.28E-05 1.91E-05 3.03E-04 0.00E+00 7.51E-04 0.00E+00 0.00E+00 0.00E+00 4.07E-06 6.36E-06 1.63E-05 0.00E+00 2.52E-06 6.49E-06 3.33E-04 8.87E-02 1.25E-05 1.89E-05 8.53E-05 4.83E-0315.3 4.5 0.6 ton/yr - actual 0.00E+00 1.03E-04 3.39E-03 1.12E-02 0.00E+00 5.11E-05 0.00E+00 9.46E-04 2.92E-04 7.66E-05 1.22E-03 0.00E+00 3.01E-03 0.00E+00 0.00E+00 0.00E+00 1.63E-05 2.55E-05 6.52E-05 0.00E+00 1.01E-05 2.61E-05 1.34E-03 3.56E-01 5.01E-05 7.60E-05 3.43E-04 1.94E-02

lb per year toxics - actual 0.00E+00 2.06E-01 6.78E+00 2.24E+01 0.00E+00 1.02E-01 0.00E+00 1.89E+00 5.85E-01 1.53E-01 2.43E+00 0.00E+00 6.03E+00 0.00E+00 0.00E+00 0.00E+00 3.27E-02 5.11E-02 1.30E-01 0.00E+00 2.03E-02 5.21E-02 2.67E+00 7.12E+02 1.00E-01 1.52E-01 6.85E-01 3.88E+01





Summary PM and Toxic Air Contaminants

ore

waste rocktailscopper concentratezinc concentratelead concentratesoil

Maximum Controlled Facility Emissions for PM and Toxic Air Contaminants (lb/hr)Actual Emissions (lb/year & ton/year) Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Cerium Chromium Cobalt Copper Iron Lead Lithium Magnesium Manganese 7 Mercury Molybdenum Nickel Phosphorus Selenium Silver Strontium Sulfur Thallium Tin Yttrium Zinc

Al Sb As Ba Be Cd Ca Ce Cr Co Cu Fe Pb Li Mg Mn Hg Mo Ni P Se Ag Sr S Tl Sn Y Zn




Haul Truck Travel (EUHAULROADS)1 Haul Trucks (ore) to Storage Piles (fugitive) 1.37 0.29 0.029 lb/hr soil 7.84E-03 0.00E+00 2.60E-06 4.53E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.53E-05 3.97E-06 6.15E-06 1.61E-02 5.06E-06 0.00E+00 1.41E-03 6.67E-05 1.22E-08 0.00E+00 1.04E-05 4.65E-04 0.00E+00 3.15E-08 0.00E+00 6.09E-05 0.00E+00 0.00E+00 0.00E+00 2.50E-05

hr/yr 8030

2 Haul Trucks (waste rock) to NWRF (fugitive) 6.11 1.31 0.13 lb/hr soil 3.50E-02 0.00E+00 1.16E-05 2.02E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.84E-05 1.77E-05 2.75E-05 7.20E-02 2.26E-05 0.00E+00 6.29E-03 2.98E-04 5.43E-08 0.00E+00 4.64E-05 2.08E-03 0.00E+00 1.40E-07 0.00E+00 2.72E-04 0.00E+00 0.00E+00 0.00E+00 1.12E-04hr/yr 8030

3 Haul Trucks (waste rock) to SWRF 1.19 0.26 0.03 lb/hr soil 6.84E-03 0.00E+00 2.27E-06 3.95E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.34E-05 3.46E-06 5.37E-06 1.41E-02 4.42E-06 0.00E+00 1.23E-03 5.82E-05 1.06E-08 0.00E+00 9.07E-06 4.06E-04 0.00E+00 2.74E-08 0.00E+00 5.31E-05 0.00E+00 0.00E+00 0.00E+00 2.18E-05(fugitive) hr/yr 8030

4 Haul Trucks (wr) to TMF 1.42 0.30 0.03 lb/hr soil 8.16E-03 0.00E+00 2.71E-06 4.72E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.60E-05 4.13E-06 6.41E-06 1.68E-02 5.27E-06 0.00E+00 1.47E-03 6.95E-05 1.27E-08 0.00E+00 1.08E-05 4.84E-04 0.00E+00 3.28E-08 0.00E+00 6.34E-05 0.00E+00 0.00E+00 0.00E+00 2.61E-05(fugitive) 8030

5 Conc't Trucks Mill to Main Gate 0.23 0.05 0.005 lb/hr soil 1.34E-03 0.00E+00 4.44E-07 7.73E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.62E-06 6.77E-07 1.05E-06 2.76E-03 8.64E-07 0.00E+00 2.41E-04 1.14E-05 2.08E-09 0.00E+00 1.78E-06 7.94E-05 0.00E+00 5.37E-09 0.00E+00 1.04E-05 0.00E+00 0.00E+00 0.00E+00 4.27E-06(fugitive) hr/yr 8030

Haul Truck Travel from Ore Storage Pads to ROM 0.61 0.13 0.01 lb/hr soil 3.48E-03 0.00E+00 1.15E-06 2.01E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.80E-06 1.76E-06 2.73E-06 7.16E-03 2.25E-06 0.00E+00 6.25E-04 2.96E-05 5.40E-09 0.00E+00 4.61E-06 2.06E-04 0.00E+00 1.40E-08 0.00E+00 2.70E-05 0.00E+00 0.00E+00 0.00E+00 1.11E-05(fugitive) hr/yr 8030

End Loader from ROM to Ore Crusher Feed Hopper 0.10 0.02 0.00 lb/hr soil 5.66E-04 0.00E+00 1.88E-07 3.27E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.11E-06 2.87E-07 4.45E-07 1.17E-03 3.66E-07 0.00E+00 1.02E-04 4.82E-06 8.79E-10 0.00E+00 7.51E-07 3.36E-05 0.00E+00 2.27E-09 0.00E+00 4.40E-06 0.00E+00 0.00E+00 0.00E+00 1.81E-06(fugitive) hr/yr 8030

Total Haul Truck Travel Emissions (fugitive) 11.0 2.4 0.2 lb/hr soil 6.32E-02 0.00E+00 2.10E-05 3.65E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.24E-04 3.20E-05 4.96E-05 1.30E-01 4.08E-05 0.00E+00 1.14E-02 5.38E-04 9.82E-08 0.00E+00 8.38E-05 3.75E-03 0.00E+00 2.54E-07 0.00E+00 4.91E-04 0.00E+00 0.00E+00 0.00E+00 2.02E-0444.3 9.5 0.9 ton/yr - actual 2.54E-01 0.00E+00 8.41E-05 1.47E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.96E-04 1.28E-04 1.99E-04 5.23E-01 1.64E-04 0.00E+00 4.56E-02 2.16E-03 3.94E-07 0.00E+00 3.37E-04 1.51E-02 0.00E+00 1.02E-06 0.00E+00 1.97E-03 0.00E+00 0.00E+00 0.00E+00 8.10E-04

lb per year toxics - actual 5.08E+02 0.00E+00 1.68E-01 2.93E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 9.92E-01 2.57E-01 3.99E-01 1.05E+03 3.28E-01 0.00E+00 9.12E+01 4.32E+00 7.88E-04 0.00E+00 6.73E-01 3.01E+01 0.00E+00 2.04E-03 0.00E+00 3.94E+00 0.00E+00 0.00E+00 0.00E+00 1.62E+00

Mercury Retort (SV-03) 7.13E-05 7.13E-05 7.13E-05 lb/hr 7.13E-05EUHGRETORT hr/yr 1200

lb per year toxics - actual 8.55E-02

Total TACs8 Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Cerium Chromium Cobalt Copper Iron Lead Lithium Magnesium Manganese Mercury Molybdenum Nickel Phosphorus Selenium Silver Strontium Sulfur Thallium Tin Yttrium Zinc2.13.E-01 lb/hr (Average 1-hr)9 total lb/hr 3.27E-01 5.98E-04 1.23E-02 7.39E-03 3.37E-05 1.95E-03 4.73E-02 4.64E-04 2.24E-03 1.49E-04 3.06E-02 7.62E-01 8.97E-02 9.00E-05 5.49E-02 1.75E-03 5.36E-04 4.14E-04 2.98E-04 7.03E-03 2.87E-05 9.62E-04 1.16E-03 1.53E+00 9.86E-05 1.67E-04 2.11E-04 5.48E-01

1521 lb/year decimal format lb/hr 0.327 0.00060 0.012 0.007 0.00003 0.002 0.047 0.000 0.002 0.0001 0.031 0.762 0.090 0.00009 0.055 0.002 5.36E-04 0.0004 0.0003 0.007 0.0000 0.0010 0.001 1.526 0.0001 0.0002 0.0002 0.5480.8 ton/year (10% of Maximum 1-hr)10 total lb/hr 3.70E-01 7.25E-04 1.48E-02 1.02E-02 4.01E-05 2.33E-03 5.62E-02 6.81E-04 2.67E-03 1.78E-04 3.46E-02 8.68E-01 1.07E-01 1.07E-04 6.19E-02 2.38E-03 6.26E-04 4.88E-04 3.33E-04 7.25E-03 3.54E-05 1.14E-03 1.56E-03 1.77E+00 1.24E-04 2.08E-04 2.97E-04 6.53E-01

(Maximum 1-hr)11 total lb/hr 1.04E+00 2.69E-03 5.27E-02 5.42E-02 1.39E-04 8.07E-03 1.95E-01 4.04E-03 9.27E-03 6.26E-04 9.67E-02 2.50E+00 3.74E-01 3.71E-04 1.71E-01 9.67E-03 2.02E-03 1.64E-03 8.69E-04 1.06E-02 1.37E-04 3.93E-03 7.72E-03 5.54E+00 5.13E-04 8.42E-04 1.63E-03 2.28E+00lb per year toxics - actual 2388 4 87 44 2.E-01 14 331 3 16 1 230 5543 626 1 402 12 3 3 2 55 0 7 7 11285 1 1 1 3810

TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TAC TACFederal HAPS: marked as HAP HAP HAP HAP HAP HAP HAP HAP HAP HAP HAP HAP

Criteria Pollutant marked as CRIT CRIT

PM PM10 PM2.5 actual hrsRefining Furnace (SV-04) 0.27 0.221 0.161 lb/hr

EUREFINFURNACE hr/yr 1200Fire Pump (SV-08) 6 0.15 0.15 0.15 lb/hr

EUFIREPUMP hr/yr 500Emergency Generators (SV-06a/b) 6 0.13 0.13 0.13 lb/hr - each

EUGENERATORS hr/yr 500Space Heaters - LPG Boilers (SV-07) 6 0.026 0.026 0.026 lb/hr

EUSPACEHEATERS 5840Reagents

Lime Silo (SV-05) 0.006 0.002 0.001 lb/hrEULIMESILO hr/yr 8760

Reagent Material Handling (fugitive) 0.004 0.002 0.0006 lb/hr(exempt) hr/yr 8030

Stack Emissions - Total 0.80 0.70 0.62 lb/hr0.7 0.4 0.3 ton/yr

Notes:1. Maximum facility emissions are all site emissions (including fugitive emissions) after applying collection and control efficiencies.2. Mill operations, including activities at both the oxide and sulfide plants (between the loading of fine ore into the ball mill and the concentrate filter press) are performed in a wet state or slurry, and as such, no particulate matter is generated. 3. Roadway emissions only include fugitive emissions from surface roadway travel. 4. Potential to Emit (PTE) for this facility is the stack emissions with no fugitives. The New Source Performance Standards (NSPS) for metallic minerals processing is applicable to this facility This NSPS (metallic mining) was developed after 1980 and since this facility is not subject to federal Maximum Achievable Control Technology (MACT) standards, fugitive dust is not part of PTE. PTE is based on controlled emissions since operation of emission control equipment will be a legally enforceable requirement of the operation. PTE for hazardous air pollutants (HAPs) is based on both stack and fugitive emissions per R 336.1116 (m).6. Toxics from combustion appear on sheets for these emissions units.

8. The TACs totals do not include calcium, iron, sulfur or zinc.7. Calculation of manganese TAC emissions is based on Note 29 in the MDEQ Table 2 List of Screening Levels. Note 29 states that the ITSL for manganese is most appropriately applied to PM10-Mn rather than TSP-Mn data. Therefore, all TAC calculations for Mn were based on PM-10 data.


Operating Schedule

Maximum & Average Operating Schedule of Emission UnitsAssociated Stack EmissionsStack Emission Unit hr/day day/yr hr/yr Fugitive Emissions hr/day day/yr hr/yrFlotation Ore Processing Circuit

SV-01A EUFLOTCRUSH feed hopper, primary crusher 24 365 8760 Maximum EUFUGITIVES Mining and ore transfer Mine Pit Fugitive Emissions

SV-01B EUFLOTFEEDCONVEYORSmill & reclaim feed conveyors Drill 12 365 4380 Max & Normal22 365 8030 Normal 2 Blast 1 365 365 Max & Normal

Material Handling 24 365 8760 MaximumOxide Ore Processing Circuit Vehicle Travel 24 365 8760 Maximum

SV-02A EUOXIDECRUSH feed hopper, primary crusher 24 365 8760 Maximum Material Handling & Vehicle Travel 22 365 8030 Normal

SV-02B EUOXIDE2CRUSH secondary and tertirary crushers

SV-02C EUOXIDEFEEDCONVEYORmill & reclaim feed conveyors 22 365 8030 Normal 2 Storage Piles

Material Handling 24 365 8760 MaximumMiscellaneous Support Equipment 22 365 8030 NormalSV-03 EUHGRETORT Mercury Retort 10 120 1200 Max & Normal Vehicle Travel 24 365 8760 Maximum

22 365 8030 NormalSV-04 EUREFINFURNACE Refinery Furnace 10 120 1200 Max & Normal

SV-05 EULIMESILO Lime Silo (reagent) 24 365 8760 Max & Normal EUCPFUGITIVES crushing plant building - fugitives Crushing Plant fugitive emissions 24 365 8760 Maximum

22 365 8030 Normal

SV-06A EUGENERATORS Emergency Generator A testing and as needed, max 500 Max EUCONCPACKAGING Cu, Pb, and Zn concentrate

packaging Concentrate Packaging 24 365 8760 Maximum

SV-06B Emergency Generator B testing and as needed, max 500 Max 22 365 8030 Normal

Each generator 3 126 Normal EUTMFWR tailings and waste rock management TMF

Wind Erosion 24 365 8760 Max & Normal

SV-07 EUSPACEHEATERS 5 HVAC Air Handling 1 24 243 5840 Max Material Transfer and WR Placement 24 365 8760 Maximum

24 183 4380 Normal Vehicle Travel on WR 24 365 8760 Maximum

22 365 8030 Normal

SV-08 EUFIREPUMP Fire Pump testing and as needed,

max500

Max & NormalEUHAULROADS roadway emissions - fugitives Haul Truck Travel 24 365 8760 Maximum

22 365 8030 NormalNotes EUREAGENTS 24 365 8760 Maximum(1) HVAC heating system is for space heating and runs 8 months each year (if needed). 22 365 8030 Normal(2) Average operations for the processing plant are based on 90% availability for 22 hours/day. (3) Actual operating hours based on estimates provided by Lycopodium.

Material Handling, Travel & WR Placement

Reagent /Material Handling





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Summary of Composition of All Materials

orewaste rocktailscopper concentratezinc concentratelead concentratesoil

Al Sb As Ba Be Cd Ca Ce Cr Co Cu Fe Pb Li Mg Mn Hg Mo Ni P Se Ag Sr S Tl Sn Y ZnAluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Cerium Chromium Cobalt Copper Iron Lead Lithium Magnesium Manganese Mercury Molybdenum Nickel Phosphorus Selenium Silver Strontium Sulfur Thallium Tin Yttrium Zinc

Year 4 wt% 7.6586 0.0183 0.2975 0.0477 0.0011 0.0639 1.5936 -- 0.0639 0.0020 0.6640 18.7892 2.9470 0.0030 1.2480 0.0837 0.0153 0.0122 0.0035 0.0381 0.0008 0.0310 0.0162 28.7633 0.0024 0.0042 0.0014 17.9346


Year 4 wt% --- 0.000672 0.022127 0.073149 --- 0.000333 --- 0.006171 0.001908 0.000500 0.007931 --- 0.019672 --- --- --- 0.000107 0.000167 0.000426 --- 0.000066 0.000170 0.008718 2.323695 0.000327 0.000496 0.002235 0.1265


Year 4 wt% --- 0.000397 0.147000 0.010950 --- 0.001870 --- 0.001520 0.001000 0.000250 0.785000 --- 0.060400 --- --- --- 0.000116 0.003200 0.002500 --- 0.000100 0.002340 0.003850 39.10 0.000240 0.000500 0.000690 0.337000


wt% 0.030000 0.075200 0.026600 0.005000 0.000050 0.015300 0.100000 0.000510 0.015000 0.000300 30.20 30.000000 3.350000 0.000200 0.030000 0.007000 0.005300 0.003060 0.010100 0.010000 0.002000 0.035500 0.000300 29.900000 0.000960 0.053500 0.000200 2.530000


wt% 0.040000 0.002590 0.021000 0.005000 0.000050 0.328000 0.190000 0.000160 0.005000 0.000100 0.617000 10.800000 0.271000 0.000200 0.020000 0.135000 0.037000 0.001850 0.003400 0.010000 0.004000 0.005340 0.000300 24.600000 0.000240 0.001900 0.000100 56.10


wt% 0.040000 0.240000 0.080000 0.005000 0.000050 0.328000 0.190000 0.000510 0.015000 0.000300 10.000000 30.000000 38.700000 0.000200 0.030000 0.135000 0.037000 0.003060 0.010100 0.010000 0.004000 0.078500 0.000300 29.900000 0.000960 0.053500 0.000200 4.86


wt% 0.573000 0.000000 0.000190 0.003310 0.000000 0.000000 -- -- 0.001120 0.000290 0.000450 1.180000 0.000370 -- 0.103000 0.022800 0.000001 -- 0.000760 0.034000 0.000000 0.000002 -- 0.004450 -- -- -- 0.001830


wt% --- 0.0000147 0.000437 0.042215 --- 0.000050 --- 0.003637 0.004308 0.001045 0.003916 --- 0.001117 --- --- --- 0.00000226 0.000161 0.001894 --- 0.0000454 0.000050 0.010967 0.010000 0.000050 0.000100 0.001606 0.003204

Use this chart for maximum emissions of Year 4

weight % all unitsAluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Cerium Chromium Cobalt Copper Iron Lead Lithium Magnesium Manganese Mercury Molybdenum Nickel Phosphorus Selenium Silver Strontium Sulfur Thallium Tin Yttrium Zinc

Al Sb As Ba Be Cd Ca Ce Cr Co Cu Fe Pb Li Mg Mn Hg Mo Ni P Se Ag Sr S Tl Sn Y ZnYear 4 ore 7.659 0.018 0.297 0.048 0.001 0.064 1.594 -- 0.064 0.002 0.664 18.789 2.947 0.003 1.248 0.084 0.015 0.012 0.003 0.038 0.001 0.031 0.016 28.763 0.002 0.004 0.001 17.935Year 4 waste rock --- 0.000672 0.022127 0.073149 --- 0.000333 --- 0.006171 0.001908 0.000500 0.007931 --- 0.019672 --- --- --- 0.000107 0.000167 0.000426 --- 0.000066 0.000170 0.008718 2.323695 0.000327 0.000496 0.002235 0.126544Year 4 tails --- 0.000397 0.147000 0.010950 --- 0.001870 --- 0.001520 0.001000 0.000250 0.785000 --- 0.060400 --- --- --- 0.000116 0.003200 0.002500 --- 0.000100 0.002340 0.003850 39.100000 0.000240 0.000500 0.000690 0.337000

Cu conc. 0.030000 0.075200 0.026600 0.005000 0.000050 0.015300 0.100000 0.000510 0.015000 0.000300 30.200000 30.000000 3.350000 0.000200 0.030000 0.007000 0.005300 0.003060 0.010100 0.010000 0.002000 0.035500 0.000300 29.900000 0.000960 0.053500 0.000200 2.530000Zn conc. 0.040000 0.002590 0.021000 0.005000 0.000050 0.328000 0.190000 0.000160 0.005000 0.000100 0.617000 10.800000 0.271000 0.000200 0.020000 0.135000 0.037000 0.001850 0.003400 0.010000 0.004000 0.005340 0.000300 24.600000 0.000240 0.001900 0.000100 56.100000Pb conc. 0.040000 0.240000 0.080000 0.005000 0.000050 0.328000 0.190000 0.000510 0.015000 0.000300 10.000000 30.000000 38.700000 0.000200 0.030000 0.135000 0.037000 0.003060 0.010100 0.010000 0.004000 0.078500 0.000300 29.900000 0.000960 0.053500 0.000200 4.860000

soil 0.573000 0.000000 0.000190 0.003310 0.000000 0.000000 -- -- 0.001120 0.000290 0.000450 1.180000 0.000370 -- 0.103000 0.022800 0.000001 -- 0.000760 0.034000 0.000000 0.000002 -- 0.004450 -- -- -- 0.001830

Parameter

Table 7 - Surficial Soil Composition

Parameter

Overburden Composition

Parameter

Table 6 - Lead Concentrate Composition

Table 1 - Ore Composition by Year

Parameter

Table 2 - Waste Rock Composition by Year

Parameter

Table 3 - Tails Composition By Year

Parameter

Table 4 - Bulk Copper Concentrate Concentration

Parameter

Table 5 - Zinc Concentrate Composition

Parameter





Mine Pit

Mine Pit Emissions

Mine pit emissions are comprised from the following activities:1 drill2 blast3 material handling4 vehicle travel

1 DrillingBased on AP-42, Table 11.19.2-2 Emission Factors for Crushed Stone Processing OperationsAdditional particle size ratios are based on AP-42 Appendix B.2 Generalized Particle Size Distributions

Emissions Emissions EmissionsPM PM-10 PM-2.5

E factor 0.00008 lb/ton processed AP-42 11.19.2-2 Efactor1 0.51 0.15 Particle size proportion 1

0.00016 0.00008 2.35E-05 Adjusted E Factor - lb/ton processed5,726 5,726 5,726 tons flotation ore throughput per day 2

0.075 0.038 0.011 Flotation Ore emissions lb/hr 3

0.898 0.458 0.135 Flotation Ore emissions lb/day Maximum Controlled Emissions0.164 0.084 0.025 Flotation Ore emissions ton/yr Drilling:

909 909 909 tons oxide ore throughput per day 2 Emissions Emissions Emissions0.012 0.006 0.002 Oxide Ore emissions lb/hr3 PM PM-10 PM-2.50.143 0.073 0.021 Oxide Ore emissions lb/day 0.09 0.04 0.013 lb/hr PM ore 0.026 0.013 0.004 Oxide Ore emissions ton/yr 0.04 0.02 0.007 lb/hr Ore (daily) 5

41,525 41,525 41,525 tons waste rock throughput per day 4 0.19 0.10 0.03 ton/yr PM ore0.54 0.28 0.08 Waste Rock emissions lb/hr3 0.54 0.28 0.08 lb/hr PM WR 6.51 3.32 0.98 Waste Rock emissions lb/day 0.27 0.14 0.04 lb/hr WR (daily) 5

1.19 0.61 0.18 Waste Rock emissions ton/yr 1.19 0.61 0.18 ton/yr PM WR0.63 0.32 0.09 total lb/hr ore + WR1.38 0.70 0.21 total ton/yr PM ore + WR

1 AP-42 Appendix B.2, page B.2-13 notes PM10 as 51% of uncontrolled emissions therefore, PM total is approximately 2 times PM10.As a proportion of PM total, PM2.5 is approx.imately 15% of PM and 30% of PM-10 (0.15/.51 * 100).2 Ore throughput from mining is based on maximum year 4.3 Assume drilling takes place over a 12 hour shift, 365 day/yr. Drilling hours per year are: 4380 hr/yr4 Waste rock throughput is based on maximum year 4. 12 hr/day

2 Blasting PM Emissions

Based on AP-42, Chapter 11.9 Western Surface Coal Mining Bench height: 18 m(Best fit for this estimate) drill hole spacing: 5 m

Emission factor equation from Table 11.9-1 hole depth: 7.5 mfor Blasting lb PM/blast

Blasting reference0.52 = PM10 factor Table 11.9-1

0.03 = PM2.5 factor Table 11.9-1

Where: E is emissions factor Area A is estimated by the volume of ore and waste rockArea Calculation

Area is estimated from blasted volume per day divided by the drill hole depth (7.5 m) 7,449,364 m3From mine plan: tonne/m3 m3/yr 7.5 m depth of blast

Flotation Ore excavated year 4: 1,896,000 tonne 2.62 723,869 993,248 m2 blasted per yearOxide Ore excavated in year 4: 301,000 tonne 2.62 114,918 29,291 ft2 area at 7.5 m deep per dayWaste rock excavated year 4: 13,750,000 tonne 2.08 6,610,577 A= 29,291 ft2 daily blast area

7,449,364


E factor 70.2 36.5 2.1 lb/blast (represents lb/day, as factor is based on total blast area per day)1 1 1 hr/day Operating days per year: 365

70.2 36.5 2.11 lb/hr Blasting hours per year: 365 hr/yr2.9 1.5 0.09 lb/hr (daily) 1 blasting pm is portioned according to the ratio: 0.14 ore

12.81 6.66 0.38 ton/yr 0.86 waste rock

5 Short-term emissions of PM, PM10, and PM2.5 from drilling have been converted to a 12-hr average hourly rate to reflect the fact they only occur during a 12-hr period each day. Where these pollutants are modeled on a basis longer than 12-hr (e.g. 24-hr or annual basis) this 24-hr average (daily) value better reflects operations for use in evaluating dispersion modeling impacts. Also see footnote 3 above.

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m

E A= 0 000014 1 5. ( ) .

E APM101 5052 0 000014= ( . )( . )( ) .

1.52.5 (0.03)(0.000014)( )PME A=





https://spinternetdev.dot.state.oh.us/Divisions/ConstructionMgt/OnlineDocs/2009MOP/200%20Earthwork/208/208%20Rock%20Blasting.htm














Mine Pit




Blasting - Additional Pollutants

Emulsion Powder Factor 0.30 kg emulsion/tonne rock blast 0.6 lb emulsion/ton rock blast

AP-42 Section 13.3 Explosives Detonation Table 13.3-1 version: 2/80 (reformatted 1/95)

ANFO maximum emissions - Based on maximum production rate of 48,160 tons per day of waste rock + ore (max Year 4); see Data Sheet

Blasting:Maximum daily production rate: 48,160 ton/day Emissions Emissions Emissions Emissions Emissions EmissionsMaximum operating days/year 365 day/yr NOx SOx CO PM PM-10 PM-2.5Average annual blasting rate: 17,578,538 ton/yr blasted rock 0.40 0.21 0.012 lb/hr PM ore (Average 1-hr) Emulsion Powder Factor 0.60 lb emulsion/ton rock blast 0.97 0.50 0.03 lb/hr PM ore (10% of Maximum 1-hr) Annual emulsion usage 10,547,123 lb emulsion/yr 9.7 5.0 0.3 lb/hr PM ore (Maximum 1-hr)

1.76 0.92 0.053 ton/yr PM ore (Average 1-hr) NOx SOx CO 2.52 1.31 0.076 lb/hr PM WR (Average 1-hr)

AP-42 factor lb emissions/ton ANFO 17 2 67 6.05 3.15 0.18 lb/hr PM WR (10% of Maximum 1-hr) Emissions (lb/yr) 89651 10547 353329 60.5 31.5 1.8 lb/hr PM WR (Maximum 1-hr) Emissions (lb/hr) 245.6 28.9 968.0 11.04 5.74 0.33 ton/yr PM WR (Average 1-hr)

Annualized Hourly Emissions (lb/hr) 2 10.2 1.2Emissions (tpy) 44.8 5.3 176.7 10.2 1.2 968.0 2.92 1.52 0.09 total lb/hr ore + WR

This blasting rate supports the maximum production rate during Year 4. 44.8 5.3 176.7 12.81 6.66 0.38 total ton/yr PM ore + WR

2 Short-term emissions of NO2 and SOx from blasting have been annualized to reflect the fact they are intermittent emissions that only occur when a blast occurs. Blasts are expected to occur approximately once per day.

3 Material Handling

Estimating material transfer emissions using - AP-42 13.2.4 Eq. (1) Transfer to ore pile & handling mat'l pile

E= emission factor:

k=particle size multiplier (dimensionless)U= mean wind speed (mph) 3.0 Reduced average wind speed (from 6.1 mph aboveground) in the pit due to the natural sheltering provided by the geometry.M= material moisture content (%) Oxide ore M=5%; sulfide ore M=5%; waste rock M=5% See Data Sheet

1 year: 365 day/year, 24 hr/day = 8760 hr/yr8030 hr/yr (Normal/Actual)

Oxide Ore throughput: 37.9 ton/hrE E E k k k U M Emissions Emissions Emissions

PM PM-10 PM-2.5 PM * PM-10 PM-2.5 PM PM-10 PM-2.5lb/ton lb/ton lb/ton unitless unitless unitless miles/hr % lb/hr lb/hr lb/hr

0.0003 0.0002 0.00002 0.74 0.35 0.053 3.00 5 0.01 0.01 0.0009

Flotation Ore throughput: 238.6 ton/hrE E E k k k U M Emissions Emissions Emissions Material Handling - Maximum

PM PM-10 PM-2.5 PM * PM-10 PM-2.5 PM PM-10 PM-2.5 Emissions Emissions Emissionslb/ton lb/ton lb/ton unitless unitless unitless miles/hr % lb/hr lb/hr lb/hr PM PM-10 PM-2.5

0.0003 0.0002 0.00002 0.74 0.35 0.053 3.00 5 0.08 0.04 0.006 0.09 0.04 0.0067 lb/hr PM ore 0.41 0.19 0.03 ton/yr PM ore0.58 0.28 0.04 lb/hr PM WR

Waste Rock throughput: 1730 ton/hr 2.56 1.21 0.18 ton/yr PM WRE E E k k k U M Emissions Emissions Emissions 0.68 0.32 0.049 total lb/hr ore + WR

PM PM-10 PM-2.5 PM * PM-10 PM-2.5 PM PM-10 PM-2.5 2.97 1.40 0.21 total ton/yr PM ore + WRlb/ton lb/ton lb/ton unitless unitless unitless miles/hr % lb/hr lb/hr lb/hr

0.0003 0.0002 0.00002 0.74 0.35 0.053 3.00 5 0.58 0.28 0.04

Total Emission Rate from Material Handling: 0.68 0.32 0.05 lb/hr2.97 1.40 0.21 ton/year

* Assume PM is represented by k factor for PM-30.

1 Short-term emissions of PM, PM10, and PM2.5 from blasting have been converted to a 24-hr average hourly rate to reflect the fact they are intermittent emissions that only occur when a blast occurs. Blasts are expected to occur approximately once per day. These pollutants are modeled on a 24-hr basis, not a 1-hr basis, thus this 24-hr average value better reflects operations for use in evaluating 24-hr dispersion modeling impacts.

E k U M lb ton=

( . ) / ( / ). .

0 00325 2

1 3 1 4


Mine Pit




4 Vehicle TravelUnpaved Road Emission Factor Calculations

AP-42 Chapter 13.2.2 Unpaved Roads 11/06

lb/VMT Equation (1a)

(dimensionless) Equation (2)

Where:E= size specific emissions factor calculated for each vehicle (lb/VMT)k= empirical constant selected from Table 13.2.2-2 (for industrial roads) (lb/VMT)

a & b= empirical constants selected from Table 13.2.2-2 (for industrial roads)

Constant PM* PM-10 PM-2.5k (lb/VMT) 4.9 1.5 0.15

a 0.7 0.9 0.9b 0.45 0.45 0.45

*Assumes PM is represented by PM-30s= surface material silt content (%)

s= 1

W= "fleet" average weight of vehicle (tons) CAT 777G truck W = 210.10 tonne (see data sheet)

231.6 ton Used for both ore and waste rock. Round-trip weight calculated from average of tare and rated loaded weight

P= number of days/year with 0.01 in precipitation, selected from AP-42 Figure 13.2.2-1P= 150

VMT= vehicle miles traveled per year, calculated separately for each vehicle fleet

Precipitation factor= 0.59 Based on equation (2) and P=135Control from

CE = 90% from roadway watering programCE = 50% from limiting truck speed to 15 mph

E factor E factor E factorPM PM-10 PM-2.5

controlled emission factor lb/VMT lb/VMT lb/VMTE haul truck traffic= 0.18 0.03 0.003 lb/VMT =E x Factor precip x CE road watering x CE limiting speed

Vehicle Mile Travelled:Based on material moved and the CAT 777G haul truck capacity:

Flotation/Oxide Ore transport 2,421,775 ton ore transport to Storage Piles (using Year 4 max)91 tonne/truck

100.3 ton/truck24,143 truck trip/year trucks ore

Waste rock transport 15,156,763 ton waste rock transport to Waste Rock Storage (using Year 4 max)100.3 ton/truck

151,099 truck trip/year trucks waste rockRound trip

175,242 total truck trips per year round trip into pit to edge of pit m miles (see Note 2)VMT per round trip 1.77 total road length to pit bottom (See Note 1): 2842 3.53 Vehicle Emissions

VMT 309,466 miles travelled per year average round trip: 1421 1.77 Emissions Emissions Emissions distance from pit floor at elevation to top of pit: 120 0.15 PM PM-10 PM-2.5

VMT per trip: 1.77 0.9 0.2 0.02 lb/hr from ore haulingEmissions: Emissions Emissions Emissions 5.5 1.0 0.10 lb/hr from waste rock hauling

Vehicle Travel PM PM-10 PM-2.5 6.3 1.2 0.1 lb/hr total haulingEmissions= 6.3 1.2 0.1 lb/hr based on a 24 hour day 8760 hr/yr maximum 27.7 5.2 0.5 ton/yr hauling

55453 10327 1033 lb/yr 8030 hr/yr normal/actual27.7 5.2 0.5 ton/yr

Mine Pit Emissions SummaryVehicle Emissions PartitioningThe composition of the mine pit floor (and therefore the dust generated from truck traffic) is estimated by applying the proportion of ore excavated to waste rock excavated. Emissions Emissions Emissions Emissions Emissions Emissions

proportion: PM PM-10 PM-2.5 PM PM-10 PM-2.5Flotation/Oxide Ore excavated: 2,421,775 ton/yr 0.14 ore 10.6 3.3 0.3 10.0 3.2 0.3 lb/hr

Waste Rock excavated: 15,156,763 ton/yr 0.86 waste rock 44.9 13.9 1.3 42.3 13.4 1.3 ton/yr

Notes:1. Mine pit road length calculated using CAD tools. The maximum distance of 2842 meters was estimated by tracking the centerline of the mine pit haul road from the surface to the bottom of the pit. Information provided by J. Whitstone on 8/25/15 to A. Martin. 2. The conversion factor for meters to miles = 2842 meters * 0.000621371 = 1.76 miles * 2 = 3.53 miles. Conversion is also 2842 meters / 1609.344498 = 1.76 miles * 2 = 3.53 miles.

Assume coarse material in pit area

Normal/ActualMaximum

% silt content of aggregate mat'l used for site roads (Assumes regular road maintenance such as grading & replacing with fresh mat'l.)

E k s Wa b

=

×

12 3

( )[ ]Factor Pprecip = −365 365/


Ore Storage

Ore Storage Pile Handling and TransportSurface Storage Pile emissions are comprised from the following activities:1. Wind Erosion from Collective Storage Piles2. Material handling at Ore Storage Pads3. Material Handling at ROM area.4. Vehicle travel - return ore to run of mine area and start of flotation and oxide ore crushing circuits.

1. Wind Erosion (Ore Storage Pile)

Approximate Dimensions (ft)1

Surface Area (ft2)1 Acres

Approximate Dimensions (ft)1

Surface Area (ft2)1 Acres

2,300 by 250 ft 575,000 13.20 700 by 200 ft 140,000 3.21

1 One square meter = 10.764 square feet

TSP = 1 1% passing Ratio to TSP*

< 10 µm = 0.30 0.30< 2.5 µm = 0.090 0.090*Assume TSP represents PMtotal (PM)

EPA-450/3-88-008 Control of Open Fugitive lb/day Dust Sources, Equation (4-9)

A - exposed ore acreage for Storage Pile A = 13.2 Based on approximate size of aggregate storage piles at East Ore Storage Pad. A - exposed tailings acreage for Storage Pile B = 3.2 Based on approximate size of aggregate storage piles at West Ore Storage Pad. PM PM-10 PM-2.5 PM PM-10 PM-2.5

k - particle size multiplier 1 = 1 0.30 0.090 k - particle size multiplier 1 = 1 0.30 0.090D - number of days/year in storage pile= 365 D - number of days/year in storage pile= 365

s - silt content %= 4 s - silt content %= 4

P - days/year with >0.01" precipitation= 150 P - days/year with >0.01" precipitation= 150

f - % time wind is >12 mph at mean pile height= 9.25 f - % time wind is >12 mph at mean pile height= 9.25

8760 8760

Wind Erosion Emissions - West Ore Storage PadEmissions Emissions Emissions Emissions Emissions Emissions

PM PM-10 PM-2.5 PM PM-10 PM-2.533.76 10.13 3.0 lb/day 8.22 2.47 0.7 lb/day

1.41 0.42 0.127 lb/hr 0.34 0.10 0.031 lb/hr6.16 1.85 0.55 ton/yr 1.50 0.45 0.14 ton/yr

Calc 12. Material Handling Activities - Ore Storage Pads Control Transfer to ore pile & handling mat'l pile - AP-42 13.2.4 Eq. (1)

Process E factor E factor E factor Efficiency Emissions Emissions Emissionsthroughput PM PM-10 PM-2.5 % PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton (See Note 4) lb/hr lb/hr lb/hr E factor referenceOxide Ore E= emission factorIncoming truck dump to oxide storage piles 37.9 0.0009 0.0004 0.0001 50% 0.016 7.62E-03 1.15E-03 13.2.4 Equation (1), see Calc 1 k=particle size multiplier (dimensionless)Manage ore within storage piles 37.9 0.0009 0.0004 0.0001 50% 0.016 7.62E-03 1.15E-03 13.2.4 Equation (1), see Calc 1 U= mean wind speed (mph)Load Haul Truck with Ore (See Note 1) 36.7 0.0009 0.0004 0.0001 50% 0.016 7.39E-03 1.12E-03 13.2.4 Equation (1), see Calc 1 M= material moisture content oxide ore (%) U= 6.1 mph See Data Sheet

Material handling emissions Oxide Ore 0.04782 0.02262 0.00343 lb/hr 8,760 8,760 8,760 hr/yr 2 Oxide Ore

Oxide ore emissions: 419 198 30 lb/yr E E E k k k U MPM PM-10 PM-2.5 PM * PM-10 PM-2.5

Flotation Ore lb/ton lb/ton lb/ton unitless unitless unitless miles/hr %Incoming truck dump to flotation storage piles 238.6 0.0009 0.0004 0.0001 50% 0.101 4.80E-02 7.26E-03 13.2.4 Equation (1), see Calc 1 0.0009 0.0004 0.0001 0.74 0.35 0.053 6.1 5Manage ore within storage piles 238.6 0.0009 0.0004 0.0001 50% 0.101 4.80E-02 7.26E-03 13.2.4 Equation (1), see Calc 1Load Haul Truck with Ore (See Note 1) 183.7 0.0009 0.0004 0.0001 50% 0.078 3.69E-02 5.59E-03 13.2.4 Equation (1), see Calc 1

Material handling emissions Flotation Ore: 0.281 0.133 0.020 lb/hr Flotation Ore8,760 8,760 8,760 hr/yr 2 E E E k k k U M

Flotation Ore emissions: 2,461 1,164 176 lb/yr PM PM-10 PM-2.5 PM * PM-10 PM-2.5lb/ton lb/ton lb/ton unitless unitless unitless miles/hr %

Total material handling of ore emissions: 0.329 0.156 0.024 lb/hr 0.0009 0.0004 0.0001 0.74 0.35 0.053 6.1 5 *Assumes k factor for PM is represented by PM-30 Storage Pad Material handlingAllocation to East Ore Storage Pad 3 0.235 0.111 0.017 lb/hr PM PM-10 PM-2.5

Allocation to West Ore Storage Pad 3 0.094 0.044 0.007 lb/hr 0.0478 0.0226 0.0034 lb/hr from oxide ore1.44 0.68 0.10 ton/yr 0.28 0.13 0.020 lb/hr from flotation ore

Allocation to East Ore Storage Pad 3 1.03 0.49 0.07 ton/yr 0.33 0.16 0.024 lb/hr from oxide and flotation oresAllocation to West Ore Storage Pad 3 0.41 0.19 0.03 ton/yr 1.44 0.68 0.103 ton/yr oxide and flotation ores

Based on particle size analysis by Orica, "Prediction of Fragment Size Distribution at Hudbay Minerals (Michigan), April 2012."Based on precipitation map in AP-42, Section 13.2.2, Unpaved Roads, Figure 13.2.2-1. Interpolate days of precipitation from contours.

Based on Table 3-2 wind frequency data in 10-15 mph range (percent) from on-site meteorological data over two-year period (eight quarters of data). From ERM Quarterly Air Quality and Meteorological Monitoring Program Data Report (July 2007 through June 2009)

Hours of operation per year


Hours of operation per year

Wind Erosion Emissions - East Ore Storage Pad

East Ore Storage Pad Dimensions and Characteristics

Particle Size Ratios: Golder Associates, 2018. Feasibility Design of Tailings and Waste Rock Management Facilities, March 2018. Particle distribution table in Appendix C for main tails and oxide master composition. Used highest percentage from oxide particle distribution to be conservative.

Based on particle size analysis by Orica, "Prediction of Fragment Size Distribution at Hudbay Minerals (Michigan), April 2012."Based on precipitation map in AP-42, Section 13.2.2, Unpaved Roads, Figure 13.2.2-1. Interpolate days of precipitation from contours.

West Ore Storage Pad Dimensions and Characteristics

E k U M lb ton=

( . ) / ( / ). .

0 00325 2

1 3 1 4




Emissions kA P s f=

−

17 365235 15 15

..


Ore Storage




Notes:1. Total material brought to storage piles represents maximum yearly production from mine for Year 4. Total material loaded into trucks for return to respective crusher represents maximum amount of material to be processed at the mill in Year 4.

2. Annual emissions consider 365 days *24 hrs per day for Storage Pile activity. 8760 hours/year8030 hours/year

Calc 13. Material Handling Activities - ROM Area Control Transfer to ore pile & handling mat'l pile - AP-42 13.2.4 Eq. (1)

Process E factor E factor E factor Efficiency Emissions Emissions Emissionsthroughput PM PM-10 PM-2.5 % PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton (See Note 4) lb/hr lb/hr lb/hr E factor referenceOxide Ore E= emission factor

Off-load Truck at Run-of-Mine Oxide Ore Storage Area 36.7 0.0009 0.0004 0.0001 50% 0.016 7.39E-03 1.12E-03 13.2.4 Equation (1), see Calc 1 M= Pb % oxide ore See Data SheetManage ore within ROM 36.7 0.0009 0.0004 0.0001 50% 0.016 7.39E-03 1.12E-03 13.2.4 Equation (1), see Calc 1 M= 0 % flotation ore See Data Sheet

Material handling emissions Oxide Ore 0.03124 0.01478 0.00224 lb/hr 8,760 8,760 8,760 hr/yr 2 Oxide Ore

Oxide ore emissions: 274 129 20 lb/yr E E E k k k U MPM PM-10 PM-2.5 PM * PM-10 PM-2.5

Flotation Ore lb/ton lb/ton lb/ton unitless unitless unitless miles/hr %Off-load Truck at Run-of-Mine Flotation Ore Storage Area 183.7 0.0009 0.0004 0.0001 50% 0.078 3.69E-02 5.59E-03 13.2.4 Equation (1), see Calc 1 0.0009 0.0004 0.0001 0.74 0.35 0.053 6.1 5 Material handling - ROMManage ore within ROM 183.7 0.0009 0.0004 0.0001 50% 0.078 3.69E-02 5.59E-03 13.2.4 Equation (1), see Calc 1 PM PM-10 PM-2.5

Material handling emissions Flotation Ore: 0.15620 0.07388 0.01119 lb/hr Flotation Ore 0.1874 0.0887 0.0134 lb/hr from oxide ore and flotation ore8,760 8,760 8,760 hr/yr 2 E E E k k k U M 0.82 0.39 0.06 ton/yr oxide and flotation ores

Flotation Ore emissions: 1,368 647 98 lb/yr PM PM-10 PM-2.5 PM * PM-10 PM-2.5lb/ton lb/ton lb/ton unitless unitless unitless miles/hr %

Total material handling of ore emissions - ROM area: 0.187 0.089 0.013 lb/hr 0.0009 0.0004 0.0001 0.74 0.35 0.053 6.1 5 *Assumes k factor for PM is represented by PM-300.82 0.39 0.06 ton/yr

Notes:1. Total material brought to storage piles represents maximum yearly production from mine for Year 4. Total material loaded into trucks for return to respective crusher represents maximum amount of material to be processed at the mill in Year 4.

2. Annual emissions consider 365 days *24 hrs per day for Storage Pile activity. 8760 hours/year3. Control efficiency accounts for measures described in the fugitive dust control plan, such as reduced drop heights 8030 hours/year

4. Vehicle TravelUnpaved roadway maximum emissions and potential to emit are based on the maximum overall production rate of the facility and the number of vehicles and trips required to handle this capacity. Based on AP-42 13.2.1 Unpaved Roads (11/06), itis used to estimate unpaved road PM, PM10, and PM2.5 emissions. The precipitation factor (factorprecip) is applied to vehicle emissions to account for the inherent control provided by the natural mitigation of rainfall and other precipitation. Additional controls are added to account for the road watering program and limitations on truck speeds. For the air permit application and to assess the worst case situation for maximum air emissions from vehicle travel, it will be assumed that all oreis first brought to one of the surface storage piles. It will also be assumed that all haul trucks must travel to the ore pile at the furthest distance from the pit, which is just south of the North Waste Rock Facility. All ore is then returned to the Run-of-Mine intermediate storage area just north of the ore crushing circuits. A front end loader will then transfer ore to the coarse ore bin, which is the beginning of each ore crushing circuit.

Haul Truck Transfer from Storage Pile to Run-of-Mine (ROM) Pile for Ore Crushing Circuit

Haul Truck Cat 777G lb/VMT Equation (1a) - for industrial roads


Where:E= emissions factor calculated for each vehicle in lb/VMTk= particle size multiplier selected from Table 13.2.2-2 for industrial roads, in lb/VMT

a & b = empirical constants selected from Table 13.2.2-2 for industrial roads.s= surface material silt content (%)

W= mean weight of vehicle (tons) = 231.6 tonsP= number of days/year with 0.01 in precipitation, selected from AP-42 Figure 13.2.2-1P= 150 days

Precipitation Factor = 0.59 Based on equation (2) and P = 150feet per mile = 5280

Control fromCE = 90% from roadway watering programCE = 50% from limiting truck speed to 15 mph

4. The 50% control efficiency factor was added to account for additional work practice measures that will be utilized at the ore storage pads and the relatively large particle size of the incoming ore material. As described in Section 4 of the Fugitive Dust Control Plan, these measures include use of concrete barriers around storage piles, situating ore storage areas in defined areas of the ore blending areas, and minimizing drop heights for both trucks and loaders that handle the material.

4. The 50% control efficiency factor was added to account for additional work practice measures that will be utilized at the ROM area and the relatively large particle size of the incoming ore material. As described in Section 4 of the Fugitive Dust Control Plan, these measures include use of concrete barriers around storage piles, situating ore storage areas in defined areas of the ore blending areas, and minimizing drop heights for both trucks and loaders that handle the material.

3. For air dispersion modeling, a portion of ore material handling has been allocated to the East Ore Storage Pad and a portion allocated to the West Ore Storage Pad. For simplicity, the total throughput of ore in Year 4 has been allocated by the number of storage piles in each area. There will be a total of 7 piles; 5 in the East location and 2 in the West location. Therefore, the allocation is 5/7 in the East location and 2/7 in the West location.

E k s Wa b

=

×

12 3


E k U M lb ton=

( . ) / ( / ). .

0 00325 2

1 3 1 4


Ore Storage




E k s W Circuit1 Payload2 material circuits VMT total totallb/VMT lb/VMT % ton a b feet ton ton/hr per hr3,4 per hr lb/hr ton/yr

PM total * 0.29 4.9 2 231.6 0.7 0.45 5000 100.1 220 2.2 2.1 0.61 2.659PM 10 0.06 1.5 2 231.6 0.9 0.45 5000 100.1 220 2.2 2.1 0.13 0.569PM2.5 0.006 0.15 2 231.6 0.9 0.45 5000 100.1 220 2.2 2.1 0.013 0.057

Notes *Assumes k factor for PM is represented by PM-301. One circuit is the distance from stockpile to crusher feed hopper, return to stockpile. 2. Payload weight is for haul truck. 3. based on daily perspective4. added 10%

Front End Loader from Run-of-Mine (ROM) Storage to Ore Crushing Circuit Feed Hopper

Front End Loader CAT 990H lb/VMT Equation (1a) - for industrial roads


Where:E= emissions factor calculated for each vehicle in lb/VMTk= particle size multiplier selected from Table 13.2.2-2 for industrial roads, in lb/VMT

a & b = empirical constants selected from Table 13.2.2-2 for industrial roads.s= surface material silt content (%)

W= mean weight of vehicle (tons) = 95.3 tonsP= number of days/year with 0.01 in precipitation, selected from AP-42 Figure 13.2.2-1P= 150 days

Precipitation Factor = 0.59 Based on equation (2) and P = 150feet per mile = 5280

Control fromCE = 90% from roadway watering programCE = 50% from limiting truck speed to 15 mph

Haul Truck and FE Loader Travelfrom Storage Pads to Rom to Ore Crusher Feed HopperEmissions Emissions Emissions

E k s W Circuit1 Payload2 material circuits VMT total total PM PM-10 PM-2.5lb/VMT lb/VMT % ton a b feet ton ton/hr per hr3,4 per hr lb/hr ton/yr 0.71 0.15 0.015 lb/hr

PM total * 0.20 4.9 2 95.3 0.7 0.45 200 16.5 220 13.4 0.5 0.10 0.433 3.09 0.66 0.066 ton/yrPM 10 0.04 1.5 2 95.3 0.9 0.45 200 16.5 220 13.4 0.5 0.02 0.093PM2.5 0.004 0.15 2 95.3 0.9 0.45 200 16.5 220 13.4 0.5 0.002 0.009

*Assumes k factor for PM is represented by PM-30 Wind Erosion Storage Piles A & B, Material Handling, Surface Storage Pile Haul & FE Travel Summary

Notes Emissions Emissions Emissions Emissions Emissions Emissions1. One circuit is the distance from ROM stockpile to crusher feed hopper, return to stockpile. PM PM-10 PM-2.5 PM PM-10 PM-2.52. Payload weight is for FE Loader. 2.97 0.92 0.21 2.72 0.84 0.19 lb/hr3. based on daily perspective 13.01 4.03 0.92 11.93 3.69 0.84 ton/yr4. added 10%

Emission Factor for the CAT 777G Haul Truck Estimated Distance

Maximum Normal/Actual

Emission Factor for the CAT 990H Front End Loader Estimated Distance

Emissions

Emissions

E k s Wa b

=

×

12 3



Site Haul Truck Travel

On-Site Roadway Fugitive Dust Emissions due to Vehicle TravelRoadway dust emissions are comprised from the following sources:

1 Ore Trucks Unpaved Road

2 Waste Rock Trucks Unpaved Road Waste rock will be transported to either the North Waste Rock Facility or South Waste Rock Facility. A portion of the waste rock will be used for construction of the berm at the Tailings Management Facility. Haul truck travel for each storage location is addressed separately.

3. Concentrate Shipment Truck - Unpaved Road Concentrate will be loaded into Product Haul Trucks at the Concentrate Handling building and transported off-site. 4. Reagent Shipment Truck - Unpaved Road Reagents will be delivered in trucks from off-site sources.

Haul truck areas are shown on Figure 3-1. Maximum emissions and potential to emit are based on the maximum overall production rate of the facility (Year 4 for both ore and waste rock production).Unpaved road emissions are based on AP-42 Chapter 13.2.2 (11/06).The precipitation factor is applied to vehicle emissions to account for the inherent control and natural mitigation of rainfall and other precipitation.

Vehicle and Trip Information Vehicle Trip DescriptionOre trucks from mine pit to Storage Pile Locations Assume all ore trucks travel from entrance of mine pit access point east along south end of TMF to middle of Ore Stockpile area.

Waste rock trucks from mine pit to North Waste Rock Facility Assume all waste rock trucks travel from pit access point and then along haul road south of TMF and then to middle of North Waste Rock Facility.Waste rock trucks from mine pit to South Waste Rock Facility Assume all waste rock trucks travel from mine pit access point to middle of South Waste Rock Facility.

Waste rock trucks from mine pit to TMF Assume all waste rock trucks travel from mine pit access point east to middle of TMF. Assume all concentrate trucks travel from concentrate building to east plant entrance. Assume all Reagent trucks travel from east plant entrance to the lime silo.

Unpaved Road Emission Factor CalculationsAP-42 Chapter 13.2.2 Unpaved Roads 11/06






a 0.7 0.9 0.9b 0.45 0.45 0.45

*Assumes PM is represented by PM-30

s= surface material silt content (%)s= 2 % silt content of aggregate mat'l used for site roads (Assumes regular road

maintenance such as grading & replacing with fresh mat'l.)

W= "fleet" average weight of vehicle (tons) - varies for each vehicle "fleet"W Ore haul truck= 231.60 ton Round-trip weight calculated from average of tare and rated loaded weight

W Waste rock haul truck= 231.60 ton Round-trip weight calculated from average of tare and rated loaded weightPayload Wt. Ore Haul Truck = 100.31 tons

Payload Wt. WR Haul Truck = 100.31 tonsW Concentrate Truck = 106.92 tons

Payload Wt. Concentrate Truck = 52.91 tonsW Reagent Truck = 106.92 tons

Payload Wt. Reagent Truck = 52.91 tons



Precipitation factor= 0.59 Based on equation (2) and P=150

PM PM-10 PM-2.5E Ore truck traffic= 5.82 1.25 0.12 lb/VMT

E Waste rock truck traffic= 5.82 1.25 0.12 lb/VMTE Concentrate truck traffic = 4.11 0.88 0.09 lb/VMT

E Reagent truck traffic = 4.11 0.88 0.09 lb/VMT

This estimate addresses haul truck travel from the mine pit to storage locations on-site. Ore will be transported to one of several intermediate Storage Piles.

Reagent trucks from Plant Entrance to Reagent Storage FacilityConcentrate trucks from Concentrate Handling Facility to Plant

𝐸𝐸 = 𝑘𝑘 𝑠𝑠/12 𝑎𝑎 × 𝑊𝑊/3 𝑏𝑏










Vehicle Miles Traveled (VMT) (Based on Year 4 for ore and waste rock)

1 Ore Trucks Unpaved Road to Storage PilesVMT ore truck = 9,000 ft (round trip distance on unpaved road between pit and average distance to Storage Piles)

5,280 feet/mile2,421,775 ton/yr ore to process (maximum in Year 4)

100.3 ton/truck24,143 trucks/year 24 hr/day delivery@365 day/yr = 8,760 Maximum hr/year

VMT ore truck = 41,153 miles/yr unpaved 22 hr/day delivery@365 day/yr 8030 Average hr/year4.70 miles/hr

2 Waste Rock Truck transporting waste rock to North Waste Rock Facility

VMT waste rock truck = 12,000 ft (round trip distance on unpaved road between pit and North Waste Rock Facility - approximate middle)5,280 feet/mile

15,156,763 ton/yr total waste rock to remove (maximum in Year 4)8,108,868 ton/yr estimated waste rock to North Waste Rock Facility (Note 1)

100.3 ton/truck80,838 trucks/year 24 hr/day delivery@365 day/yr 8,760 Maximum hr/year

VMT waste rock truck = 183,723 miles/yr unpaved 22 hr/day delivery@365 day/yr 8030 Average hr/year20.97 miles/hr

3 Waste Rock Truck transporting waste rock to South Waste Rock Facility

VMT waste rock truck = 5,000 ft (round trip distance on unpaved road between pit and South Waste Rock Facility - approximate middle)5,280 feet/mile

15,156,763 ton/yr total waste rock to remove (maximum in Year 4)3,804,347 ton/yr estimated waste rock to South Waste Rock Facility (Note 1)



4 Waste Rock Truck transporting waste rock to Tailings Management Facility (for berm construction)

VMT waste rock truck = 7,000 ft (round trip distance on unpaved road between pit and Tailings Management Facility - approximate middle)5,280 feet/mile

15,156,763 ton/yr total waste rock to remove (maximum in Year 4)3,243,547 ton/yr estimated waste rock to TMF (Note 1)



Note 1:

VMT Conc't Truck = 13,700 ft (round trip distance on between concentrate facility and east mine entrance gate)5,280 feet/mile

202,935 ton/yr total concentrate (Cu + Pb + Zn) to transport (maximum Cu, Pb, and Zn conc't in Year 4)52.9 payload ton/truck

3,836 trucks/year 24 hr/day delivery@365 day/yr 8,760 Maximum hr/yearVMT Conc't Truck = 9,953 miles/yr unpaved 22 hr/day delivery@365 day/yr 8030 Average hr/year

1.14 miles/hr

VMT Reagent Truck = 13,700 ft (round trip distance on between Reagent storage and east mine entrance gate)5,280 feet/mile

13,162 ton/yr total reagents to transport (maximum annual throughput)52.9 payload ton/truck249 trucks/year 24 hr/day delivery@365 day/yr 8,760 Maximum hr/year

VMT Reagent Truck = 646 miles/yr unpaved 22 hr/day delivery@365 day/yr 8030 Average hr/year0.07 miles/hr

Emissions from Ore, Waste Rock, and ConcentrateTrucks transporting Materials On-site Emissions from Waste Rock Truck Transport

5 Concentrate Truck transporting combined Concentrates on Unpaved Road from Concentrate Handling Facility to West Mine Entrance Gate at River Road (Alternate Option)

According to information provided by Aquila, waste rock will be distributed to three facilitiess: North Waste Rock Facility (NWRF), South Waste Rock Facility, and Tailings Management Facility or TMF (for berm construction). The proportions will be as follows: Based on a maximum of 15,156,763 tons per year, 53.5% will go to the NWRF, 25.1% will go to the SWRF, and 21.4% will be transferred to the TMF for berm construction. These conversions are included in the ton/yr calculations.

6 Reagent Truck transporting Reagents on Unpaved Road from West Mine Entrance Gate to Reagent storage, e.g. lime silo (Alternate Option)

Emissions E VMT CE= −( )( )( %)1






1 Ore Trucks Unpaved Road to Storage Piles 2 Waste Rock Trucks transporting waste rock to North Waste Rock FacilityUnpaved vehicle miles traveled, VMT 41,153 VMT/yr

4.70 VMT/hr Unpaved vehicle miles traveled, VMT 183,723 VMT/yr 20.97 VMT/hr

CE= 90% from roadway watering program CE= 90% from roadway watering programCE= 50% from limiting truck speed to 15 mph CE= 50% from limiting truck speed to 15 mph

Emissions Emissions Emissions Emissions Emissions EmissionsPM PM-10 PM-2.5 PM PM-10 PM-2.5

Unpaved Road Emission Factor EF 5.82 1.25 0.12 lb/VMT Unpaved Road Emission Factor EF 5.82 1.25 0.12 lb/VMTEmissions 1.37 0.29 0.03 lb/hr Emissions 6.11 1.31 0.13 lb/hrEmissions 11,979 2,563 256 lb/yr Emissions 53,480 11,441 1,144 lb/yr

3 Waste Rock Trucks transporting waste rock to South Waste Rock Facility 4 Waste Rock Trucks transporting waste rock to TMF

Unpaved vehicle miles traveled, VMT 35,915 VMT/yr Unpaved vehicle miles traveled, VMT 42,870 VMT/yr 4.10 VMT/hr 4.89 VMT/hr



Unpaved Road Emission Factor EF 5.82 1.25 0.12 lb/VMT Unpaved Road Emission Factor EF 5.82 1.25 0.12 lb/VMTEmissions 1.19 0.26 0.03 lb/hr Emissions 1.42 0.30 0.03 lb/hrEmissions 10,454 2,236 224 lb/yr Emissions 12,479 2,670 267 lb/yr

Emissions from Product Haul Trucks transporting concentrate from Concentrate Facility to West Mine Facility Entrance at River Road (Alternate Option)

5 Concentrate Truck transporting combined Cu, Pb & Zn Concentrate on Unpaved Road from Mill to West Mine Facility Entrance at River Road (Alternate Option) Roadway Fugitive Dust Truck Travel Summary

Unpaved vehicle miles traveled, VMT = 9,953 VMT/year Emissions Emissions Emissions Emissions Emissions Emissions1.14 VMT/hour PM PM-10 PM-2.5 PM PM-10 PM-2.5

CE= 90% from roadway watering and sweeping program 10.32 2.21 0.22 9.46 2.02 0.20 lb/hrCE= 50% from limiting truck speed to 15 mph 45.2 9.7 1.0 38.00 8.13 0.81 ton/yr


Unpaved Road Emission Factor EF 4.11 0.88 0.09 lb/VMTEmissions 0.23 0.05 0.005 lb/hrEmissions 2,046 438 44 lb/yr

Emissions from Haul Trucks transporting Reagents from West Mine Facility Entrance at River Road to reagent storage (Alternate Option)

6 Truck transporting combined reagents on Unpaved Road from West Mine Facility Entrance at River Road

Unpaved vehicle miles traveled, VMT = 646 VMT/year0.07 VMT/hour

CE= 90% from roadway watering and sweeping programCE= 50% from limiting truck speed to 15 mph


Unpaved Road Emission Factor EF 4.11 0.88 0.09 lb/VMTEmissions 0.02 0.003 0.0003 lb/hrEmissions 133 28 3 lb/yr

Maximum Normal/Actual


TMF-WR

Tailings and Waste Rock Management - Wind Erosion and Material Transfer

Emissions are comprised from the following activities:1. Wind erosion from Tailings Management Facility (TMF)2. Material transfer and placement of waste rock at the North and South Waste Rock facilities and TMF3. Vehicle travel on waste rock

General DescriptionTailings will be deposited in the Tailings Management Facility (TMF) on the central portion of the facility (Figure 3-2). Both oxide and flotation mill tailings will be deposited together into the TMF. The TMF will be constructed in lifts. The berm for the tailings impoundment portion will be constructed of waste rock from the pit. Tailings will be pumped from the mills in a water-saturated state (approximately 80% solids) and the tailings will be generally covered with water in the TMF. Drying may occur in inactive sections of the tailings impoundment, however it is anticipated that a crust layer will form over the dried portions of the tailings area. While no particulate emissions will occur in active tailings areas due to the high moisture content as the material is pumped into the basin, some particulate emission may occur in inactive areas due to wind erosion. It is estimated that at maximum, approximately 112,500 square meters of exposed tailings beach would be present at Stage 4 of the TMF. To be conservative, wind erosion will be estimated based on this area.

1. Wind Erosion (tails )

Exposed Tailings Surface Area

(Not covered in water) (m2)1

Tailings Surface Area (ft2) Acres

112,500 1,210,950 27.80

1 One square meter = 10.764 square feet

TSP = 1 1% passing Ratio to TSP*

< 10 µm = 0.30 0.30< 2.5 µm = 0.090 0.090*Assume TSP represents Pmtotal (PM)

EPA-450/3-88-008 Control of Open Fugitive lb/day Dust Sources, Equation (4-9)

A - exposed tailings acreage for TMF= 27.8 largest exposure in Stage 5PM PM-10 PM-2.5

k - particle size multiplier 1 = 1 0.30 0.090D - number of days/year in storage pile= 365

s - silt content %= 87

P - days/year with >0.01" precipitation= 150

f - % time wind is >12 mph at mean pile height= 9.25

Apply control efficiency to reflect crust layer formation on tailings: 98%

8760


30.93 9.28 2.8 lb/day1.29 0.39 0.116 lb/hr5.64 1.69 0.51 ton/yr

Wind erosion (waste rock)Blasted waste rock from the pit will be loaded into haul trucks, transported to the TMF, and unloaded in a location of ongoing berm/tailings basin construction. Small particles in the materialmay be part of dust generated in material handling (2. Material Transfer of Waste Rock) or will quickly settle out. Therefore, once the waste rock has been placed, the silt content becomes negligible. Given the wind erosion calculation is based partially on the percent silt in the material, wind erosion of the waste rock in the berm of the TWF is considered negligible.


Particle Size Ratios: Golder Associates, 2018. Feasibility Design of Tailings and Waste Rock Management Facilities, March 2018 . Particle distribution table in Appendix C for main tails and oxide master composition. Used highest percentage from oxide particle distribution to be conservative.

Based on Particle Distribution Table for tailings in Golder Associates report Trade-Off Evaluation - Feasibility Design of Tailings and Waste Rock Management Facilities, March 2018 .

Based on precipitation map in AP-42, Section 13.2.2, Unpaved Roads, Figure 13.2.2-1. Interpolate days of precipitation from contours.

TMF Dimensions and Characteristics

Assume 98% control due to formation of crust layer on exposed tailings area and remaining moisture in material. Exposure to wind erosion is also reduced by placing tailings in layers between waste rock layers and is below surface of a berm formed by waste rock materials. Hours of operation per year

Wind Erosion Emissions - TMF

Emissions kA P s f=

−

17 365235 15 15

..





TMF-WRClient: Aquila Resources, Inc. Project ID.: 17A021Project:



2. Material Transfer and placement of Waste Rock at North Waste Rock Facility (NWRF), South Waste Rock Facility (SWRF), and TMF. Two activities are estimated here: unloading of waste rock from the haul truck; and placement in the berm/basin of the NWRF, SWRF, and TMF. Both operations are estimated using AP-42 Ch. 13.2.4. The two activities are combined in the estimate in this section.

Calc 1AP-42 13.2.4 Eq. (1)

E= emission factor

k=particle size multiplier (dimensionless)= 0.74 PM *Assumes k factor for PM is represented by PM-30k=particle size multiplier (dimensionless)= 0.35 PM-10k=particle size multiplier (dimensionless)= 0.053 PM-2.5

U= mean wind speed (mph)= 6.1 mph (average wind speed over 8 quarters of data from ERM M= material moisture content (%)= 5 Waste rock moisture content

Days per year= 365 dayhours per day= 24 hrs

Total Waste Rock Production 2 15,156,763 ton/yearWaste Rock Transferred to NWRF = 8,108,868 ton/year Waste Rock Transferred to SWRF = 3,804,347 ton/year Waste Rock transferred to TMF: 3,243,547 ton/year

NWRF: SWRF: TMF:

Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions EmissionsPM PM-10 PM-2.5 PM PM-10 PM-2.5 PM PM-10 PM-2.5

Emission factor 0.0009 0.0004 0.00006 lb/ton Emission Factor 0.0009 0.0004 0.00006 lb/ton Emission Factor 0.0009 0.0004 0.00006 lb/ton0.787 0.372 0.056 lb/hr 0.369 0.175 0.026 lb/hour 0.315 0.149 0.023 lb/hour

3.4 1.6 0.2 ton/yr3 1.6 0.8 0.12 ton/year 1.4 0.7 0.10 ton/yearNotes:

2. This represents maximum waste rock excavation in Year 4. Therefore, this is representative of the largest annual production of waste rock over the life of the mine. 3. Number of hours/year is 8030 hours. This is based on waste rock production occuring in mine at 365 days/year, 22 hours per day.

1. Particle size multipliers estimated from data collected for tailings material. Data are in Particle Distribution Table for tailings in Golder Associates report Trade-Off Evaluation - Tailings and Waste Rock Management Alternatives , August 2010.

E = k (0.0032) (U/5) 1.3 / (M/2) 1.4





3. Vehicle Travel on Waste Rock

AP-42 Chapter 13.2.2 Unaved Roads 11/06 lb/VMT Equation (1a)





a 0.7 0.9 0.9b 0.45 0.45 0.45


s= surface material silt content (%)s= 1 % silt content for waste rock materials (Assumes relatively large pieces of material)

W Waste rock haul truck= 231.60 ton Round-trip weight calculated from average of tare and rated loaded weight


VMT= vehicle miles traveled per year, calculated separately for each vehicle fleetPrecipitation factor= 0.59 Based on equation (2) and P=135

PM PM-10 PM-2.5E Waste rock truck traffic= 3.58 0.67 0.07 lb/VMT

NWRF: SWRF:

VMT waste rock truck = 2000 feet VMT waste rock truck = 2000 feet

2 round trip factor 2 round trip factor4000 feet round trip 4000 feet round trip5280 feet per mile Days per year= 365 day 5280 feet per mile Days per year= 365 day0.76 miles per trip hours per day= 24 hrs 0.76 miles per trip hours per day= 24 hrs

8760 hr/yr maximum 8760 hr/yr maximum8,108,868 ton/yr waste rock to transport 8030 hr/yr normal/actual 3,804,347 ton/yr waste rock to transport 8030 hr/yr normal/actual

100.1 ton/truck 100.1 ton/truck81,008 truck trips /year 38,006 truck trips /year

VMT waste rock truck = 61,370 VMT/yr VMT waste rock truck = 28,792 VMT/yr 7.01 VMT/hr 3.29 VMT/hr



Unpaved Road Emission Factor EF 3.58 0.67 0.07 lb/VMT Unpaved Road Emission Factor EF 3.58 0.67 0.07 lb/VMTEmissions 1.3 0.234 0.023 lb/hr Emissions 0.59 0.110 0.011 lb/hrEmissions 5.5 1.0 0.10 ton/yr Emissions 2.6 0.480 0.048 ton/yr

From Year 4 waste rock production and Figure 3-2, distance from entrance of SWRF to center of facility (given some trips will be longer and some shorter)

From Year 4 waste rock production and Figure 3-2, distance from entrance of NWRF to center of facility (given some trips will be longer and some shorter).

E k s Wa b

=

×

12 3

Eext = E [(365 - P) / 365]





TMF:VMT waste rock truck = 2000 feet From Year 4 waste rock production and Figure 3-2, distance from entrance of TMF to center of facility (given some trips will be longer and some shorter).

2 round trip factor4000 feet round trip5280 feet per mile Days per year= 365 day0.76 miles per trip hours per day= 24 hrs

8760 hr/yr maximum3,243,547 ton/yr waste rock to transport 8030 hr/yr normal/actual

100.3 ton/truck32,336 truck trips /year

VMT waste rock truck = 24,497 VMT/yr 2.80 VMT/hr

CE= 90% from roadway watering programCE= 50% from limiting truck speed to 15 mph


Unpaved Road Emission Factor EF 3.58 0.67 0.07 lb/VMTEmissions 0.501 0.093 0.009 lb/hrEmissions 2.2 0.4 0.04 ton/yr

Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions EmissionsPM PM-10 PM-2.5 PM PM-10 PM-2.5 PM PM-10 PM-2.5 PM PM-10 PM-2.5

2.04 0.61 0.08 0.96 0.28 0.04 0.82 0.24 0.03 1.29 0.39 0.116 lb/hr8.95 2.65 0.35 4.20 1.25 0.16 3.57 1.06 0.14 5.64 1.69 0.51 ton/yr

Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions EmissionsPM PM-10 PM-2.5 PM PM-10 PM-2.5 PM PM-10 PM-2.5 PM PM-10 PM-2.5

1.87 0.56 0.07 0.88 0.26 0.03 0.75 0.22 0.03 1.29 0.39 0.116 lb/hr8.20 2.43 0.32 3.85 1.14 0.15 3.28 0.97 0.13 5.64 1.69 0.51 ton/yr

Normal/Actual

Maximum Maximum Maximum Maximum

Normal/Actual Normal/Actual Normal/Actual

Wind Erosion at TMF

NWRF Waste Rock Placement & Travel

NWRF Waste Rock Placement & Travel

Wind Erosion

TMF Waste Rock Placement & Travel

TMF Waste Rock Placement & Travel

SWRF Waste Rock Placement & Travel

SWRF Waste Rock Placement & Travel


Ore Handling and Processing

Ore handling and processing emissions are comprised from the following activities:1 Flotation Ore Feed Hopper and Primary Crushing (stack)2 Flotation Ore Mill Feed Transfer System (stack)3 Oxide Ore Feed Hopper and Primary Crushing (stack)4 Oxide Ore Secondary and Tertiary Crushing (stack)5 Oxide Ore Mill Feed Transfer System (stack)6 Crushing fugitive emissions (fugitive)7 Flotation Plant Concentrate Packaging Operations (fugitive)

Ore Handling and ProcessingCapture Control Control

1 Flotation Ore Feed Hopper and Primary Crushing (stack) Process E factor E factor E-Factor Efficiency Efficiency Efficiency Emissions Emissions Emissions(Vented to DC-01A and SV-01A) thru-put PM PM-10 PM-2.5 4 % note 2b % note 2c,d % note 2a PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton capture PC equip indoor lb/hr lb/hr (lb/hr) Efactor Reference1 Transfer from truck to Feed hopper ( See Note 1) 0.003 0.0011 0.00033 0.000 0.000 0.0000 11.19.2-2 Conveyor transfer, uncontrolled2 Feed hopper to Vibrating grizzly feeder 184 0.003 0.0011 0.00033 95% 99.5% 0.003 0.001 0.0003 11.19.2-2 Conveyor transfer, uncontrolled3 Vibrating grizzly feeder to Jaw crusher chute (oversize material) 123 0.003 0.0011 0.00033 95% 99.5% 0.002 0.001 0.0002 11.19.2-2 Conveyor transfer, uncontrolled4 Rock breaker 3 (See Note 1) 0.0054 0.0024 0.00072 0.0000 0.0000 0.00000 11.19.2-2 Tertiary Crushing, uncontrolled 5 Vibrating grizzly feeder to By-pass chute (undersize material) 61 0.003 0.0011 0.00033 95% 99.5% 0.001 0.0003 0.0001 11.19.2-2 Conveyor transfer, uncontrolled6 By-pass chute to Flotation Transfer conveyor 61 0.003 0.0011 0.00033 95% 99.5% 0.001 0.0003 0.0001 11.19.2-2 Conveyor transfer, uncontrolled7 Jaw crusher chute to Jaw crusher 123 0.003 0.0011 0.00033 95% 99.5% 0.002 0.001 0.0002 11.19.2-2 Conveyor transfer, uncontrolled8 Jaw crusher 123 0.0054 0.0024 0.00072 95% 99.5% 0.003 0.001 0.0004 11.19.2-2 Tertiary Crushing, uncontrolled9 Jaw crusher to Discharge 123 0.003 0.0011 0.00033 95% 99.5% 0.002 0.001 0.0002 11.19.2-2 Conveyor transfer, uncontrolled

10 Jaw Crusher Discharge Chute to Flotation Transfer Conveyor 184 0.003 0.0011 0.00033 95% 99.5% 0.003 0.001 0.0003 11.19.2-2 Conveyor transfer, uncontrolled11 Flotation Transfer Conveyor to Flotation Coarse Ore Stockpile Conveyor 184 0.003 0.0011 0.00033 95% 99.5% 0.003 0.001 0.0003 11.19.2-2 Conveyor transfer, uncontrolled

Note 1 - This is fugitive emission and not captured by control device. Emissions are included below for Item No. 6. Point Source Emissions vented to DC-01A and SV-01A 0.018 0.007 0.002 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

158 60 18 lb/yr0.08 0.03 0.01 ton/yr

Not Captured Control Control 2 Flotation Ore Mill Feed Transfer System (stack) Process E factor E factor E-Factor by Hood Efficiency Efficiency Emissions Emissions Emissions(Vented to DC-01B and SV-01B) thru-put PM PM-10 PM-2.5 4 % note 2f % note 2c,d % note 2a PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton fugitive PC equip covered lb/hr lb/hr (lb/hr) Efactor Reference12 Flotation Ore Stockpile Conveyor to Coarse Ore Stockpile (See Note 1) 0.003 0.0011 0.00033 0.000 0.000 0.000 11.19.2-2 Conveyor transfer, uncontrolled13 Coarse Ore Stockpile to Reclaim Feeders 183 0.003 0.0011 0.00033 95% 99.5% 0.003 0.001 0.0003 11.19.2-2 Conveyor transfer, uncontrolled14 Reclaim Feeders to Mill Feed Conveyor 183 0.003 0.0011 0.00033 95% 99.5% 0.003 0.001 0.000 11.19.2-2 Conveyor transfer, uncontrolled15 Mill Feed Conveyor to SAG Mill (See Note 1) 0.003 0.0011 0.00033 0.000 0.000 0.0000 11.19.2-2 Conveyor transfer, uncontrolled

Note 1 - This is fugitive emission and not captured by control device. Emissions are included below for Item No. 6. Point Source Emissions vented to DC-01B and SV-01B 0.005 0.002 0.0006 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

46 17 5 lb/yr 0.02 0.01 0.003 ton/yr

Loca

tion

(Not

e 0)









Capture Control Control 3 Oxide Ore Feed Hopper and Primary Crushing (stack) Process E factor E factor E-Factor Efficiency Efficiency Efficiency Emissions Emissions Emissions(Vented to DC-02A and SV-02A) thru-put PM PM-10 PM-2.5 4 % note 2b % note 2c,d % note 2a PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton capture PC equip indoor lb/hr lb/hr (lb/hr) Efactor Reference16 Transfer from truck to Feed hopper (See Note 1) 0.003 0.0011 0.00033 0.000000 0.000000 0.000000 11.19.2-2 Conveyor transfer, uncontrolled17 Feed hopper to Vibrating grizzly feeder 37 0.003 0.0011 0.00033 95% 99.5% 0.0005236 0.000192 0.000058 11.19.2-2 Conveyor transfer, uncontrolled18 Vibrating grizzly feeder to Jaw crusher chute (oversize material) 25 0.003 0.0011 0.00033 95% 99.5% 0.000350 0.000128 0.000038 11.19.2-2 Conveyor transfer, uncontrolled19 Rock breaker 3 (See Note 1) 0.0054 0.0024 0.00072 0.000000 0.000000 0.000000 11.19.2-2 Tertiary Crushing, uncontrolled20 Vibrating grizzly feeder to By-pass chute (undersize material) 12 0.003 0.0011 0.00033 95% 99.5% 0.000174 0.000064 0.000019 11.19.2-2 Conveyor transfer, uncontrolled21 By-pass chute to Oxide Transfer Conveyor 12 0.003 0.0011 0.00033 95% 99.5% 0.000174 0.000064 0.000019 11.19.2-2 Conveyor transfer, uncontrolled22 Jaw crusher chute to Jaw crusher 25 0.003 0.0011 0.00033 95% 99.5% 0.000350 0.000128 0.000038 11.19.2-2 Conveyor transfer, uncontrolled23 Jaw crusher 25 0.0054 0.0024 0.00072 95% 99.5% 0.000630 0.000280 0.000084 11.19.2-2 Tertiary Crushing, uncontrolled 24 Jaw crusher to Discharge Chute 25 0.003 0.0011 0.00033 95% 99.5% 0.000350 0.000128 0.000038 11.19.2-2 Conveyor transfer, uncontrolled25 Jaw Crusher Discharge Chute to Oxide Transfer Conveyor 37 0.0030 0.00110 0.000330 95% 99.5% 0.0005236 0.000192 0.0000576 11.19.2-2 Conveyor transfer, uncontrolled

Note 1 - This is fugitive emission and not captured by control device. Emissions are included below for Item No. 6. Point Source Emissions vented to DC-02A and SV-02A 0.003 0.001 0.0004 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

27 10 3 lb/yr0.013 0.005 0.002 ton/yr

Capture Control Control 4 Oxide Ore Secondary and Tertiary Crushing (stack) Process E factor E factor E-Factor Efficiency Efficiency Efficiency Emissions Emissions Emissions(Vented to DC-02B and SV-02B) thru-put PM PM-10 PM-2.5 4 % note 2b % note 2c,d % note 2a PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton capture PC equip indoor lb/hr lb/hr (lb/hr) Efactor Reference26 Oxide Transfer Conveyor to Oxide Secondary Crusher Feed Bin 37 0.0030 0.00110 0.000330 95% 99.5% 0.0005236 0.000192 5.76E-05 11.19.2-2 Conveyor transfer, uncontrolled27 Oxide Secondary Crusher Feed Bin to Secondary Crusher Feeder 37 0.003 0.0011 0.00033 95% 99.5% 0.00052 0.0002 5.76E-05 11.19.2-2 Conveyor transfer, uncontrolled28 Secondary Crusher Feeder to Oxide Secondary Crusher 37 0.003 0.0011 0.00033 95% 99.5% 0.00052 0.0002 5.76E-05 11.19.2-2 Conveyor transfer, uncontrolled29 Secondary cone crusher 37 0.0054 0.0024 0.00072 95% 99.5% 0.0009 0.0004 1.26E-04 11.19.2-2 Tertiary Crushing, uncontrolled 30 Secondary cone crusher to Secondary cone crusher discharge chute 37 0.003 0.0011 0.00033 95% 99.5% 0.0005 0.0002 5.76E-05 11.19.2-2 Conveyor transfer, uncontrolled31 Secondary cone crusher discharge chute to Tertiary feed conveyor 37 0.003 0.0011 0.00033 90.0% 0.0110 0.0040 1.21E-03 11.19.2-2 Conveyor transfer, uncontrolled32 Tertiary feed conveyor to Oxide Double Deck Screen 62 0.003 0.0011 0.00033 95% 99.5% 0.0009 0.0003 9.72E-05 11.19.2-2 Conveyor transfer, uncontrolled33 Oxide Double Deck Screen to Tertiary Crusher Feed Bin 25 0.003 0.0011 0.00033 95% 99.5% 0.0003 0.0001 3.85E-05 11.19.2-2 Conveyor transfer, uncontrolled34 Tertiary crusher feed bin to Tertiary crusher feeder 25 0.003 0.0011 0.00033 95% 99.5% 0.0003 0.0001 3.85E-05 11.19.2-2 Conveyor transfer, uncontrolled35 Tertiary crusher feeder to Tertiary crusher 25 0.003 0.0011 0.00033 95% 99.5% 0.0003 0.0001 3.85E-05 11.19.2-2 Conveyor transfer, uncontrolled36 Tertiary Cone Crusher 25 0.0054 0.0024 0.00072 95% 99.5% 0.0006 0.0003 8.39E-05 11.19.2-2 Tertiary Crushing, uncontrolled37 Tertiary cone crusher to Tertiary cone crusher discharge chute 25 0.003 0.0011 0.00033 90.0% 0.0074 0.0027 8.10E-04 11.19.2-2 Conveyor transfer, uncontrolled38 Tertiary cone crusher discharge chute Tertiary cone crusher discharge conveyor 25 0.003 0.0011 0.00033 90.0% 0.0074 0.0027 8.10E-04 11.19.2-2 Conveyor transfer, uncontrolled39 Tertiary cone crusher discharge conveyor to Tertiary Feed Conveyor 25 0.003 0.0011 0.00033 95% 99.5% 0.0003 0.0001 3.85E-05 11.19.2-2 Conveyor transfer, uncontrolled40 Oxide Double Deck screen to Under screen conveyor feed chute 37 0.003 0.0011 0.00033 95% 99.5% 0.0005 0.00019 5.76E-05 11.19.2-2 Conveyor transfer, uncontrolled41 Under screen conveyor feed chute to Oxide Fine Ore Product conveyor 37 0.003 0.0011 0.00033 90.0% 0.0110 0.00404 1.21E-03 11.19.2-2 Conveyor transfer, uncontrolled42 Oxide Fine Ore Feed Conveyor to Oxide Fine Ore Bin Feed Conveyor 37 0.003 0.0011 0.00033 90.0% 0.0110 0.0040 1.21E-03 11.19.2-2 Conveyor transfer, uncontrolled

Point Source Emissions vented to DC-02B and SV-02B 0.054 0.020 0.006 lb/hr maximum hours based on: 8760 8760 8760 hr/yr 5

475 175 53 lb/yr0.24 0.09 0.026 ton/yr






Capture Control Control 5 Oxide Ore Mill Feed Transfer System (stack) Process E factor E factor E-Factor Efficiency Efficiency Efficiency Emissions Emissions Emissions(Vented to DC-02C and SV-02C) thru-put PM PM-10 PM-2.5 4 % note 2b % note 2c,d % note 2a PM PM-10 PM-2.5

ton/hr lb/ton lb/ton lb/ton capture PC equip covered lb/hr lb/hr (lb/hr) Efactor Reference43 Oxide Fine Ore Bin Feed Conveyor to Oxide Fine Ore Bin (See Note 1) 0.003 0.0011 0.00033 0.000 0.000 0.000 11.19.2-2 Conveyor transfer, uncontrolled44 Oxide Fine Ore Bin to Oxide Reclaim Feeder 37 0.003 0.0011 0.00033 95% 99.5% 0.0005 0.0002 0.00006 11.19.2-2 Conveyor transfer, uncontrolled45 Oxide Reclaim Feeder to Oxide Mill Feed Conveyor 37 0.003 0.0011 0.00033 95% 99.5% 0.0005 0.0002 0.00006 11.19.2-2 Conveyor transfer, uncontrolled46 Oxide Mill Feed Conveyor to Oxide Ore Ball Mill Feed Chute (See Note 1) 0.003 0.0011 0.00033 0.000 0.000 0.0000 11.19.2-2 Conveyor transfer, uncontrolled47 Oxide ore Ball Mill Feed Chute to Oxide ball mill (See Note 1) 0.003 0.0011 0.00033 0.000 0.000 0.0000 11.19.2-2 Conveyor transfer, uncontrolled

Note 1 - This is fugitive emission and not captured by control device. Emissions are included below for Item No. 6. Point Source Emissions vented to DC-02C and SV-02C 0.001 0.0004 0.0001 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

9 3 1 lb/yr 0.0046 0.0017 0.0005 ton/yr

6 Crushing fugitive emissions (fugitive) Not Captured Control Control Process E factor E factor E-Factor by Hood Efficiency Efficiency Emissions Emissions Emissions

Flotation Ore Primary Crushing (Fugitive) thru-put PM PM-10 PM-2.5 4 % note 2b % note 2c,d % note 2a PM PM-10 PM-2.5ton/hr lb/ton lb/ton lb/ton fugitive PC equip indoor lb/hr lb/hr (lb/hr) Efactor Reference

1 Transfer from truck to Feed hopper 183 0.003 0.0011 0.00033 95% 0.02750 0.01008 0.00303 11.19.2-2 Conveyor transfer, uncontrolled2 Feed hopper to Vibrating grizzly feeder 183 0.003 0.0011 0.00033 5% 98% 0.00055 0.00020 0.00006 11.19.2-2 Conveyor transfer, uncontrolled3 Vibrating grizzly feeder to Jaw crusher chute (oversize material) 122 0.003 0.0011 0.00033 5% 98% 0.00037 0.00013 0.00004 11.19.2-2 Conveyor transfer, uncontrolled4 Rock breaker 3 9 0.0054 0.0024 0.00072 95% 0.00248 0.00110 0.00033 11.19.2-2 Tertiary Crushing, uncontrolled 5 Vibrating grizzly feeder to By-pass chute (undersize material) 61 0.003 0.0011 0.00033 5% 98% 0.00018 0.00007 0.00002 11.19.2-2 Conveyor transfer, uncontrolled6 By-pass chute to Flotation Transfer conveyor 61 0.003 0.0011 0.00033 5% 98% 0.00018 0.00007 0.00002 11.19.2-2 Conveyor transfer, uncontrolled7 Jaw crusher chute to Jaw crusher 122 0.003 0.0011 0.00033 5% 98% 0.00037 0.00013 0.00004 11.19.2-2 Conveyor transfer, uncontrolled8 Jaw crusher 122 0.0054 0.0024 0.00072 5% 98% 0.00066 0.00029 0.00009 11.19.2-2 Tertiary Crushing, uncontrolled 9 Jaw crusher to Discharge 122 0.003 0.0011 0.00033 5% 98% 0.00037 0.00013 0.00004 11.19.2-2 Conveyor transfer, uncontrolled

10 Jaw Crusher Discharge Chute to Flotation Transfer Conveyor 183 0.003 0.0011 0.00033 5% 98% 0.00055 0.00020 0.00006 11.19.2-2 Conveyor transfer, uncontrolled11 Flotation Transfer Conveyor to Flotation Coarse Ore Stockpile Conveyor 183 0.003 0.0011 0.00033 5% 98% 0.00055 0.00020 0.00006 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Flotation Ore Primary Crushing 0.034 0.013 0.004 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

296 111 33 lb/yr0.15 0.06 0.02 ton/yr

Flotation Ore Mill Transfer System (Fugitive)

12 Flotation Ore Stockpile Conveyor to Coarse Ore Stockpile 183 0.003 0.0011 0.00033 98% 0.01100 0.00403 0.00121 11.19.2-2 Conveyor transfer, uncontrolled13 Coarse Ore Stockpile to Reclaim Feeders 183 0.003 0.0011 0.00033 5% 98% 0.00055 0.00020 0.00006 11.19.2-2 Conveyor transfer, uncontrolled14 Reclaim Feeders to Mill Feed Conveyor 183 0.003 0.0011 0.00033 5% 98% 0.00055 0.00020 0.00006 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Flotation Ore Mill Transfer System 0.012 0.004 0.001 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

106 39 12 lb/yr0.05 0.02 0.01 ton/yr

Flotation Ore SAG Mill Transfer Point (Fugitive)

15 Mill Feed Conveyor to SAG Mill 183 0.003 0.0011 0.00033 90% 98% 0.00110 0.00040 0.00012 11.19.2-2 Conveyor transfer, uncontrolledFugitive Emissions from Flotation Ore SAG Mill Transfer Point 0.00 0.00 0.00 lb/hr

maximum hours based on: 8760 8760 8760 hr/yr 5

10 4 1 lb/yr0.00 0.00 0.00 ton/yr






Oxide Ore Primary Crushing (Fugitive)

16 Transfer from truck to Feed hopper 37 0.003 0.0011 0.00033 95% 0.00550 0.00202 0.00061 11.19.2-2 Conveyor transfer, uncontrolled17 Feed hopper to Vibrating grizzly feeder 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled18 Vibrating grizzly feeder to Jaw crusher chute (oversize material) 24 0.003 0.0011 0.00033 5% 98% 0.00007 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled19 Rock breaker 3 2 0.0054 0.0024 0.00072 95% 0.00050 0.00022 0.00007 11.19.2-2 Tertiary Crushing, uncontrolled 20 Vibrating grizzly feeder to By-pass chute (undersize material) 12 0.003 0.0011 0.00033 5% 98% 0.00004 0.00001 0.00000 11.19.2-2 Conveyor transfer, uncontrolled21 By-pass chute to Oxide Transfer Conveyor 12 0.003 0.0011 0.00033 5% 98% 0.00004 0.00001 0.00000 11.19.2-2 Conveyor transfer, uncontrolled22 Jaw crusher chute to Jaw crusher 24 0.003 0.004 0.0012 5% 98% 0.00007 0.00010 0.00003 11.19.2-2 Conveyor transfer, uncontrolled23 Jaw crusher 24 0.0054 0.0024 0.00072 5% 98% 0.00013 0.00006 0.00002 11.19.2-2 Tertiary Crushing, uncontrolled 24 Jaw crusher to Discharge Chute 24 0.003 0.0011 0.00033 5% 98% 0.00007 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled25 Jaw Crusher Discharge Chute to Oxide Transfer Conveyor 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Oxide Ore Primary Crushing 0.0066 0.0026 0.0008 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

58.2 22.4 6.7 lb/yr0.029 0.011 0.003 ton/yr

Oxide Ore Secondary and Tertiary Crushing (Fugitive)

26 Oxide Transfer Conveyor to Oxide Secondary Crusher Feed Bin 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled27 Oxide Secondary Crusher Feed Bin to Secondary Crusher Feeder 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled28 Secondary Crusher Feeder to Oxide Secondary Crusher 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled29 Secondary cone crusher 37 0.0054 0.0024 0.00072 5% 98% 0.00020 0.00009 0.00003 11.19.2-2 Tertiary Crushing, uncontrolled 30 Secondary cone crusher to Secondary cone crusher discharge chute 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled31 Secondary cone crusher discharge chute to Tertiary feed conveyor 37 0.003 0.0011 0.00033 98% 0.00220 0.00081 0.00024 11.19.2-2 Conveyor transfer, uncontrolled32 Tertiary feed conveyor to Oxide Double Deck Screen 62 0.003 0.0011 0.00033 5% 98% 0.00019 0.00007 0.00002 11.19.2-2 Conveyor transfer, uncontrolled33 Oxide Double Deck Screen to Tertiary Crusher Feed Bin 25 0.003 0.0011 0.00033 5% 98% 0.00007 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled34 Tertiary crusher feed bin to Tertiary crusher feeder 25 0.003 0.0011 0.00033 5% 98% 0.00007 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled35 Tertiary crusher feeder to Tertiary crusher 25 0.003 0.0011 0.00033 5% 98% 0.00007 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled36 Tertiary Cone Crusher 25 0.0054 0.0024 0.00072 5% 98% 0.00013 0.00006 0.00002 11.19.2-2 Tertiary Crushing, uncontrolled 37 Tertiary cone crusher to Tertiary cone crusher discharge chute 25 0.003 0.0011 0.00033 98% 0.00148 0.00054 0.00016 11.19.2-2 Conveyor transfer, uncontrolled38 Tertiary cone crusher discharge chute Tertiary cone crusher discharge conveyor 25 0.003 0.0011 0.00033 98% 0.00148 0.00054 0.00016 11.19.2-2 Conveyor transfer, uncontrolled39 Tertiary cone crusher discharge conveyor to Tertiary Feed Conveyor 25 0.003 0.0011 0.00033 5% 98% 0.00007 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled40 Oxide Double Deck screen to Under screen conveyor feed chute 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled41 Under screen conveyor feed chute to Oxide Fine Ore Product conveyor 37 0.003 0.0011 0.00033 98% 0.00220 0.00081 0.00024 11.19.2-2 Conveyor transfer, uncontrolled42 Oxide Fine Ore Feed Conveyor to Oxide Fine Ore Bin Feed Conveyor 37 0.003 0.0011 0.00033 98% 0.00220 0.00081 0.00024 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Oxide Ore Secondary and Tertiary Crushing 0.011 0.004 0.001 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

96 35 11 lb/yr0.048 0.018 0.005 ton/yr

Oxide Ore Mill Transfer System (Fugitive)

43 Oxide Fine Ore Bin Feed Conveyor to Oxide Fine Ore Bin 37 0.003 0.0011 0.00033 98% 0.00220 0.00081 0.00024 11.19.2-2 Conveyor transfer, uncontrolled44 Oxide Fine Ore Bin to Oxide Reclaim Feeder 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled45 Oxide Reclaim Feeder to Oxide Mill Feed Conveyor 37 0.003 0.0011 0.00033 5% 98% 0.00011 0.00004 0.00001 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Oxide Ore Mill Transfer System 0.0024 0.0009 0.0003 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

21 8 2 lb/yr0.011 0.004 0.001 ton/yr

Oxide Ore Ball Mill Transfer (Fugitive)

46 Oxide Mill Feed Conveyor to Oxide Ore Ball Mill Feed Chute 37 0.003 0.0011 0.00033 90% 0.01100 0.00403 0.00121 11.19.2-2 Conveyor transfer, uncontrolled47 Oxide ore Ball Mill Feed Chute to Oxide ball mill 37 0.003 0.0011 0.00033 90% 98% 0.00022 0.00008 0.00002 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Oxide Ore Ball Mill Transfer 0.0112 0.0041 0.0012 lb/hrmaximum hours based on: 8760.0 8760.0 8760.0 hr/yr 5

98.3 36.0 10.8 lb/yr 0.049 0.018 0.005 ton/yr






Crushing Plant Fugitives TotalsIncludes all separately calculated emission sources for Item No. 6 0.0782 0.0291 0.0087 lb/hr

8760 8760 8760 hr/yr 5

685 254 76 lb/yr0.34 0.13 0.04 ton/yr

Control Control 7 Flotation Plant Concentrate Packaging Operations (fugitive) Process E factor E factor E-Factor Not captured Efficiency Efficiency Emissions Emissions Emissions

thru-put PM PM-10 PM-2.5 4 % note % note 2e % note 2a PM PM-10 PM-2.5ton/hr lb/ton lb/ton lb/ton fugitive PC equip indoor lb/hr lb/hr (lb/hr) Efactor Reference

Copper Concentrate Filter Press to Copper Concentrate Receiving Hopper 1.8 0.003 0.0011 0.00033 25.0% 98% 0.0001 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolledCopper Concentrate Receiving Hopper to Conveyor 1.8 0.003 0.0011 0.00033 25.0% 98% 0.0001 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolledConveyor to Second Feed Hopper 1.8 0.003 0.0011 0.00033 25.0% 98% 0.0001 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolledFeed Hopper to Bulk Product Truck 1.8 0.003 0.0011 0.00033 25.0% 98% 0.0001 0.00003 0.00001 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Copper Concentrate Packaging 0.0003 0.000 0.000 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

3 1 0.3 lb/yr0.00 0.001 0.000 ton/yr

Lead Concentrate Filter Press to Copper Concentrate Receiving Hopper 0.4 0.003 0.0011 0.00033 25.0% 98% 0.00002 0.00001 0.00000 11.19.2-2 Conveyor transfer, uncontrolledLead Concentrate Receiving Hopper to Conveyor 0.4 0.003 0.0011 0.00033 25.0% 98% 0.00002 0.00001 0.00000 11.19.2-2 Conveyor transfer, uncontrolledConveyor to Second Feed Hopper 0.4 0.003 0.0011 0.00033 25.0% 95% 0.00005 0.00002 0.00001 11.19.2-2 Conveyor transfer, uncontrolledFeed Hopper to Bulk Product Truck 0.4 0.003 0.0011 0.00033 25.0% 98% 0.00002 0.00001 0.00000 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Lead Concentrate Packaging 0.00011 0.0000 0.0000 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

1 0 0.1 lb/yr0.00 0.000 0.000 ton/yr

Zinc Concentrate Filter Press to Zinc Concentrate Receiving Hopper 20.9 0.003 0.0011 0.00033 25.0% 98% 0.001 0.00035 0.00010 11.19.2-2 Conveyor transfer, uncontrolledZinc Concentrate Feed Hopper to Conveyor 20.9 0.003 0.0011 0.00033 25.0% 98% 0.001 0.00035 0.00010 11.19.2-2 Conveyor transfer, uncontrolledConveyor to Feed Hopper 20.9 0.003 0.0011 0.00033 25.0% 98% 0.001 0.00035 0.00010 11.19.2-2 Conveyor transfer, uncontrolledFeed Hopper to Bulk Product Truck 20.9 0.003 0.0011 0.00033 25.0% 98% 0.001 0.00035 0.00010 11.19.2-2 Conveyor transfer, uncontrolled

Fugitive Emissions from Zinc Concentrate Packaging 0.004 0.001 0.0004 lb/hrmaximum hours based on: 8760 8760 8760 hr/yr 5

33 12 3.6 lb/yr0.02 0.006 0.002 ton/yr

Concentrate packaging Operations Total0.004 0.002 0.000 lb/hr

Includes all separately calculated emission sources for Item No. 7 8760 8760 8760 hr/yr 5

37 13 4.0 lb/yr0.018 0.007 0.002 ton/yr

Crushing and Concentrate packaging Operations Total (Fugitive) 0.082 0.031 0.009 lb/hrIncludes emission sources for Items No. 6 and 7 0.361 0.134 0.040 ton/yr






Notes:

2. Capture & control efficiencies applied:

(a) Emission source is indoors in an enclosed building or enclosed by cover. Efficiency applied is:98%

Emission source is indoors but only partially enclosed: 95%(b) Emission source is a pick up point. Capture efficiency applied is: 95%

The pick ups route a portion of the fugitive emissions to a stack where the dust collector efficiency can be applied. The fugitive portion is counted separately at: 5%

(c) Emission source has a wet spray. Efficiency applied is: 90%(d) Emission source has a dust collector. Efficiency applied is: 99.5%

(e) Concentrate is 10-12% moisture. Additional Control Efficiency applied is: 25.0% Crushed ore being fed to the ball mill chute is being mixed into a slurry immediately. Control efficiency is : 90%

3. Rock breaker throughput: % of incoming ore 5%

4. Assume PM-2.5 is approximately 30% of PM-10 per AP-42, as calculated below. See Appendix B-2, Category 3, September 1990.

% cumulative sizePM-2.5 = 15.0 %PM-10 = 51.0 %

Ratio PM-2.5 / PM-10 = 0.29

5. Operations will take place 24/7/365 8760 hr/yr maximum8030 hr/yr normal/actual

1. Maximum controlled emissions are all site emissions (including fugitive emissions) after applying collection and control efficiencies. Hourly throughput for ore processing is based on processing the maximum quantity of ore being processed in Year 4.


Reagents

Reagent emissions are comprised from the following activities: 1 hazardous air pollutant emissions 2 lime silo emissions3 material handling

1 Reagent Emission Summary 2 Reagent Silo Emissions SV-05

SDS NameCommon name - form PM (lb/yr) PM -10 (lb/yr) PM-2.5 (lb/yr) Process E factor E factor E factor Emissions Emissions Emissions

thru-put1 PM PM-10 PM-2.5 PM PM-10 PM-2.5KI-11 Xanthate Sodium isopropyl Activity ton/year lb/ton lb/ton lb/ton lb/yr lb/yr lb/yr E factor referencexanthate(SIPX) xanthate 85% 0.6 0.3 0.1 Lime Silo Emissions- supersac dry 140-93-2 56,456 0.00099 0.00034 0.0001 55.9 19 7

Methyl isobutyl carbinol*+ Methyl isobutyl Total emissions Lime Silo 56 19 7 lb/yr maximum EmissionsMIBC carbinol 100% 0.006 0.002 0.001 lb/hr Maximum Controlled Emissions3

- liquid 108-11-2

Notes:Zinc Sulfate Zinc Sulfate 1. Thru-put is noted on Data Sheet and represents the maximum lime needs of the facility.

7733-02-0 100% 3.7 1.9 0.71. Chapter 11.24 of AP-42 does not contain emission factors to account for controlled bin vent emissions occurring from the loading of storage silos pneumatically. Thus, emission factors for the Chapter 11.12 Concrete Batching for loading cement into elevated silos have been used as a surrogate.

Copper Sulfate Copper Sulfate7758-98-7 100% 7.38 3.69 1.29 2. Assume PM-2.5 is approximately 35% of PM-10 per AP-42, as calculated below. See Appendix B-2, Category 4, September 1990.

% cumulative sizePolyacrylamide Polyacrylamide PM-2.5 = 30 %

Flocculant 100% 2.28 1.14 0.40 PM-10 = 85 %Ratio PM-2.5 / PM-10 = 0.35

Lead Nitrate Lead Nitrate 3. Hourly emissions have been estimated by dividing the annual emissions by 8760 hours/year.10099-74-8 100% 0.17 0.09 0.03

4. maximum emissions are estimated as actual emissions + 10%. Or see Data sheet for actual lime thru put

Zinc Dust Zinc Dust Normal/Actual Reagent Silo Emissions7440-66-6 100% 0.70 0.35 0.12

Process E factor E factor E factor Emissions Emissions Emissionsthru-put1 PM PM-10 PM-2.5 PM PM-10 PM-2.5

Sodium Metabisulfite Sodium Metabisulfite Activity ton/year lb/ton lb/ton lb/ton lb/yr lb/yr lb/yr E factor reference007681-57-4 98% 9.07 4.53 1.59 Lime Silo Emissions

pneumatic unloading from truck to silo 51,752 0.00099 0.00034 0.0001 51.2 18 6

Sodium Sulfite007757-83-7 1.5% 0.1388 0.0694 0.0243 Total emissions Lime Silo 51 18 6 lb/yr maximum Emissions

0.006 0.002 0.001 lb/hr Maximum Controlled Emissions3

Promoter (AP 3418A)flocculant 0.73 0.37 0.13-bags 013360-78-6

Sodium Cyanide Sodium Cyanide143-33-9 100% 4.69 2.35 0.82

Note : Balance of material composition is non-hazardous.*MIBC and sodium sulfite are listed toxic air contaminants under Michigan's air pollution regulations. +MIBC emissions calculations are provided on the next sheet.

Emissions are calculated for material handling, which will generate PM. There will be one transfer point accounted for to address the material being added to the receiving tank. Once the dry material is mixed in the tank, no further PM will be generated. MIBC is aliquid to begin with and will not generate PM; however, a separate calculation accounting for volatilization is provided below.

Sodium Diisobutyldi-Thiophosphinate

Hazardous Component & CAS Number

Composition by % weight

Hazardous Component Emissions

52%

The lime silo is equipped with a bin vent which filters air released as the silo is filled from a bulk delivery truck. The silo fill process is intermittent and takes less than one hour.

pneumatic unloading from truck to silo

See separate calcs below

11.12-2 Cement unloading to elevated storage silo (pneumatic) (controlled E.F.)

11.12-2 Cement unloading to elevated storage silo (pneumatic) (controlled E.F.)





Reagents




3 PM Emissions for Handling Dry Materials (activity inside mill building, contributes to fugitive volume source)

Max. Annual E factor E factor Control Emissions Emissions Emissionsthruput PM PM-10 Efficiency1 PM PM-10 PM-2.5 ton/yr lb/ton lb/ton % lb/yr lb/yr lb/yr E factor reference

xanthate(SIPX) 297.0 0.12 0.06 98% 0.7 0.4 0.12 11.24-2 Material handling/transfer, low moisture

Zinc Sulfate 1556.5 0.12 0.06 98% 3.74 1.87 0.654 11.24-2 Material handling/transfer, low moisture

Copper Sulfate 3075.6 0.12 0.06 98% 7.38 3.69 1.29 11.24-2 Material handling/transfer, low moisture

Lead Nitrate 72.6 0.12 0.06 98% 0.17 0.09 0.030 11.24-2 Material handling/transfer, low moisture

Zinc Dust 292.6 0.12 0.06 98% 0.70 0.35 0.123 11.24-2 Material handling/transfer, low moisture

Sodium Metabisulfite 3854.4 0.12 0.06 98% 9.25 4.63 1.619 11.24-2 Material handling/transfer, low moisture

Promoter (AP 3418A) 587.4 0.12 0.06 98% 1.41 0.70 0.247 11.24-2 Material handling/transfer, low moisture

Sodium Cyanide 1954.7 0.12 0.06 98% 4.69 2.35 0.82 11.24-2 Material handling/transfer, low moisture

AN-926VHM Flocculant (Polyacrylamide) 948.2 0.12 0.06 98% 2.28 1.14 0.398 11.24-2 Material handling/transfer, low moisture

Silica 68.2 0.12 0.06 98% 0.16 0.08 0.03 11.24-2 Material handling/transfer, low moisture

Diatomaceous Earth (Celatom LCS-3) 451.4 0.12 0.06 98% 1.08 0.54 0.19 11.24-2 Material handling/transfer, low moisture

Borax 3.4 0.12 0.06 98% 0.01 0.004 0.001 11.24-2 Material handling/transfer, low moisture

Total Reagents = 13,162 tons/yr Emissions Emissions Emissions1. This emission source is indoors or enclosed. Efficiency applied is: 98% Totals = PM PM-10 PM-2.5 2. The mill runs 8760 hours per year. 0.004 0.002 0.0006 lb/hr 2

31.6 15.8 5.5 lb/yr

4 MIBC Emissions from Volatilization from MIBC reagent storage tank (exempt source)(activity inside reagent building)Working Loss Equation from Section 7.1 of AP-42 for Liquid Storage Tanks: LW = 0.0010 X MV X PVA X Q X KN X KP VOC Emissions

30.90 lb/yrWhere: MV = Vapor Molecular Weight, lb/lb-mole = 102.2 0.015 ton/yr

PVA = Vapor pressure at daily average liquid surface temperature, psia1 = 7.16E-02Q = Annual net throughput, bbl/year = 4225KN = Turnover factor, dimensionless = 1

KP = Working loss product factor for most organic liquids, dimensionless = 1

S.G. = 0.802 @ 25 °C, density of H2O = 1000 kg/m3, thus, density of MIBC = 802 kg/m3 Reagent PM EmissionsQ = 1476 kg/day / 802 kg/m3 = 1.840 m3/day Maximum Normal/ActualQ = 0.723 m3/day X 365 days/year = 672 m3/year Emissions Emissions Emissions Emissions Emissions EmissionsQ = 672 m3/year X 6.28981057 barrel/m3 = 4225 bbl/year PM PM-10 PM-2.5 PM PM-10 PM-2.5

Reagent silo 0.006 0.002 0.001 0.006 0.002 0.001 lb/hrLW = 0.0010 X MV X PVA X Q X KN X KP Reagent silo 0.028 0.010 0.003 0.026 0.009 0.003 ton/yr

LW = 30.90 lb/year MIBC Emissions Material handling 0.004 0.002 0.0006 0.003 0.002 0.0006 lb/hr

0.00353 lb/hr MIBC emissions in 8760 hr/yr Material handling 0.016 0.008 0.003 0.014 0.007 0.002 ton/yrTotal Reagent Emissions 0.010 0.004 0.001 0.009 0.004 0.001 lb/hr

Notes: Total Reagent Emissions 0.044 0.017 0.006 0.040 0.016 0.006 ton/yr

% cumulative sizePM-2.5 = 30 %PM-10 = 85 %

Ratio PM-2.5 / PM-10 = 0.35

2. Assume PM-2.5 is approximately 35% of PM-10 per AP-42, as calculated below for processed ores and nonmetallic minerals. See Appendix B-2, Category 4, September 1990.

1. This is the vapor pressure for MIBC at 20 °C as reported by the manufacturer. The vapor pressure is listed as 3.7 mmHg, the conversion is 3.7 X 0.019336 psia/mmHg = 0.0716 = 7.16E-02 psia.


Mercury Retort and Refining Furnace

Mercury Retort System Vent to Condensers, Carbon Adsorber and SV-03

Mercury EmissionsRetort is electric, therefore no combustion emissions are generated.Operations limit operating hours to 10 hour batches, 120 days/year production (1200 hr/yr)Pollution control equipment: condenser and carbon adsorber to reduce mercury from the process.Expected emissions after treatment: 10-4 to 10-5 grains per cubic foot exhaust gas (Vendor)

Note on Flow of Hg to System:Expected Flow of Hg to System (see Note) = 812 gram/hr Conversion = 15.43 grain/gram Bulk density ore = 2.62 t/m3 (= tonne/m3)

Expected Flow of Hg to System = 1.8 lb/hr 0.0022 lb/gram Calculation: 2.62 t/m3 * (0.001 m3 / 1 liter) = 0.002619 t/literExpected Airflow from system = 50 ft3/hr 0.00262 t/liter * 1,000,000 g / t = 2619 g/liter

Inlet Concentration = 250.61 grains/ft3 Maximum hours/year = 1200 hr/yrExit Concentration = 0.0001 grains/ft3 Average hours/year= 1200 hr/yr 92 liters (3.3 ft3) of precipitate filter cake per batch (Lyntek, 2012)Control Efficiency = 99.99996 % 1200 hr/year / 10 hours/ batch = 120 batches/year

Hourly Hg Emissons = 7.13E-05 lb/hr 120 batches/year * 92 liters/batch = 11040 liters/year92 liters/batch / 10 hours/batch = 9.2 liters/hour

Maximum Annual Controlled Emissions = 8.55E-02 lb/yrAverage Annual Controlled Emissions = 8.55E-02 lb/yr 2619.26 g/liter * 9.2 liter/hour = 24097 grams/hour

Highest Hg concentration in ore = 0.03371 (occurs in year 2)24097.2 grams/hr * 0.0337 Hg ore = 812 grams Hg/hour

Refining Furnace Operations Vent to Wet Scrubber and SV-04

2. Process Particulate Emissions

Maximum Crucible Capacity = 30 ft3 Information on maximum crucible size provided by Lycopodium, August 2018Precipitate Density = 168.56 lb/ft3

Maximum Filter Cake per Charge = 5056.80 lbMaximum Filter Cake per Charge = 2.53 tonWet Scrubber Control Efficiency = 95%

Hours per Batch = 10 hr/batchPM Emission Factor = 21 lb/ton Table 12.5-2 - Melting and Refining Uncontrolled

PM10 Emission Factor = 17.5 lb/ton Table 12.5-2 - Melting and Refining UncontrolledPM2.5 Emission Factor = 12.7 lb/ton Table 12.5-2 - Melting and Refining Uncontrolled

PTE Operating time: 1200 hr/yr Batches per Year 120 Smelts per year

Wet scrubber control efficiency 1: 95%

PTE Process Particulate Emissions (Controlled with Wet Scrubber)(For purposes of emission calculations, assume LPG PM = PM10 = PM2.5)

PM PM10 PM2.5PTE Emissions (lb/hr) 0.27 0.221 0.161PTE Emissions (lb/yr) 318.6 265.5 192.7PTE Emissions (tpy) 0.159 0.133 0.096

Summary of Refining Furnace EmissionsPM PM10 PM2.5

PTE Emissions (lb/hr) 0.27 0.221 0.161PTE Emissions (lb/yr) 318.6 265.5 192.7PTE Emissions (tpy) 0.159 0.133 0.096

Actual Emissions = PTE since actual hours = maximum operational hours.1. Reference: EPA/452/F-03-017 Venturi Scrubbers

This equipment generates PM emissions from heating feed material (Process PM). Batch operation limits operating hours to 10 hour batches, 120 days/year production (1200 hr/yr). An early design included a propane combustion furnace, which was changed to an electric furnace.





Plant Space Heaters

LPG Combustion

Emission FactorsAP-42 Table 1.5-1 Emission Factors for LPG Combustion

LPG Pollutant Emission Factor - lb/1000 gal NOx 13CO 7.5TOC 1PM 0.7 (Assume all PM10)SO2 0.10S S=sulfur content expressed in gr/100 ft3 gas vapor (see calc at bottom)SO2 0.0812 at S=10 ppm

Operating Data:Maximum Input Heat Rating 0.682 mmBTU/hr 200 kW rating (each heating unit)PTE Operating time: 5840 hr/yr 3412.14 (Btu/hr)/kWNumber of heaters running: 5 heating units

Actual Operating Time: 4380 hr/yr five units operating 24hr/day 6 months/yr at 4380 hr/year.

LPG Heat Input: 91.5 mmBTU/1000 gal AP-42 Chapter 1.5Number of heaters running: 5 heating units

Potential to Emit Uncontrolled Emissions 1

NOx CO TOC PM SO2PTE Emissions (lb/hr) 0.485 0.280 0.037 0.026 0.0030PTE Emissions (lb/yr) 2,831 1,633 218 152 18PTE Emissions (tpy) 1.42 0.82 0.11 0.08 0.01

Calculation of SS= gr S/100 ft3 vapor 7000 gr=1 lb

sulfur content 10 ppm Platt's Petrochemicals Guide to Specifications - LPG propane vapor density at 1 atm, 70F 0.116 lb/ft3sulfur content of vapor at 10 ppm 0.00000116 lb/ft3convert to gr/100ft3:

S= 0.812 gr S/100 ft3 vapor

Actual Emissions 2

NOx CO TOC PM SO2Actual Emissions (lb/hr) 0.485 0.280 0.037 0.026 0.0030Actual Emissions (lb/yr) 2,123 1,225 163 114 13Actual Emissions (tpy) 1.06 0.61 0.082 0.057 0.0066

Notes:

(2) Actual emissions were calculated based on five heaters operating 24 hr/day for 6 months of the year.

(1) The facility will have five space heaters, which will be assumed to operate at the same time. Potential to emit was calculated based on the facility operating 5 units unit 24 hr/day for 8 months.





Emergency Generators

Emergency Generators

SV-06A and SV06B

Engine Data:Units will be located on the north side of the main power substation, as shown on Fig. 3-2. Fuel Consumption @ 100% load: 104.6 gph, Diesel (info from CAT engineering data sheet)

Heating value of diesel: 137,000 Btu/galMaximum hours of operation per year: 500 hours 2.6195029 mmBTU/hour

Emissions Factors from Caterpillar Data: Cat 3512C, Standby operation, Nominal emissionsEmission

Pollutant g/hp-hr lb/hp-hr Caterpillar Technical Information*

Organic PollutantsFactor

NOx 5.48 0.0121 Caterpillar Technical Information* (lb/mmBtu) (lb/hr) (lb/yr)CO 0.48 0.0011 Caterpillar Technical Information* Benzene 7.76E-04 0.01 5.6

HC (VOC) 0.12 0.00026 Caterpillar Technical Information* Toluene 2.81E-04 0.004 2.0PM 0.03 0.00007 Caterpillar Technical Information* Xylenes 1.93E-04 0.003 1.4

SO2 0.00809S AP-42 Table 3.4-1, where S=%sulfur in fuel Propylene 2.79E-03 0.04 20.0SO2 0.000012 at S=0.0015% (This is amount in Ultra Low Sulfur Diesel (ULSD) 1,3-Butadiene 3.91E-05 0.0006 0.3

Formaldehyde 7.89E-05 0.001 0.6Acetaldehyde 2.52E-05 0.0004 0.2

Conversion: kilowatt = 1.3405 hp Acrolein 7.88E-06 1.13E-04 0.1* Caterpillar Technical Information for Diesel Generator Set, 3512C Diesel Generator Set Polycyclic aromatic hydrocarbons (PAH)

Naphthalene 1.30E-04 1.86E-03 0.93PTE calculations will be based on power output of 1500 kW, which is rating of the equipment. Acenaphthylene 9.23E-06 1.32E-04 0.07

Acenaphthene 4.68E-06 6.71E-05 0.03Number of Generators: 2 Fluorene 1.28E-05 1.83E-04 0.09

Power generated per Unit: 1500 kW Phenanthrene 4.08E-05 5.85E-04 0.29Power generated per Unit: 2011 hp Anthracene 1.23E-06 1.76E-05 0.01

Total Power generated: 4022 hp Fluoranthene 4.03E-06 5.78E-05 0.03PTE Operating Time 1: 500 hr/year Pyrene 3.71E-06 5.32E-05 0.03

Actual Operating Time 2: 126 hr/year Benzo(a)anthracene * 6.22E-07 8.91E-06 0.004 0.1 8.91E-07Chrysene * 1.53E-06 2.19E-05 0.01 0.01 2.19E-07

Potential to Emit Benzo(b)fluoranthene * 1.11E-06 1.59E-05 0.008 0.1 1.59E-06Benzo(k)fluoranthene * 2.18E-07 3.12E-06 0.002 0.1 3.12E-07

NOx SOx PM10 CO VOC Benzo(a)pyrene * 2.57E-07 3.68E-06 0.002 1 3.68E-06Caterpillar Emission Test Data Indeno(1,2,3-cd)pyrene * 4.14E-07 5.93E-06 0.003 0.1 5.93E-07lb/hp-hr (power output) 0.0121 0.00007 0.00106 0.00026 Dibenz(a,h)anthracene * 3.46E-07 4.96E-06 0.002 1.1 5.45E-06AP-42 E factor lb/hp-hr 0.000012 Benzo(g,h,l)perylene 5.56E-07 7.97E-06 0.004Hourly Emission Rate (lb/hr) 48.5 0.049 0.27 4.3 1.1 Total PAH 2.12E-04 3.03E-03 1.52Annualized Hourly Emission Rate (lb/hr) 3 2.8 Source of emission factors: AP-42, Tables 3.4-3 & 3.4-4 (October 1996 update)Annual Emission Rate (lb/yr) 24270.7 24.4 132.9 2125.9 531.5 * Items with an asterisk are listed PAH carcinogens. Annual Emission Rate (ton/yr) 12.1 0.01 0.07 1.1 0.27

Notes:

Actual Emissions (1) PTE is based on EPA guidance on the maximum number of hours for an emergency generator (EPA Memorandum dated September 6, 1995).(2) Actual operating hours based on estimates provided by Lycopodium.

NOx SOx PM10 CO VOC

Caterpillar Emission Test Datalb/hp-hr (power output) 0.0121 0.00007 0.00106 0.00026AP-42 E factor lb/hp-hr 0.000012Hourly Emission Rate (lb/hr) 48.5 0.049 0.27 4.3 1.1

Annualized Hourly Emission Rate (lb/hr) 3 0.7Annual Emission Rate (lb/yr) 6116.2 6.1 33.5 535.7 133.9Annual Emission Rate (ton/yr) 3.1 0.003 0.017 0.268 0.067

(4) Pursuant to the MDEQ PAH guidance document Screening Levels for Polycyclic Aromatic Hydrocarbon s, dated November 4, 2015, emissions in lb/hr have been adjusted using the Relative Potency Factors (RPF) provided in the guidance document to allow for screening using the Allowable Emission Rate Methodology under Rule 227 (1) (a).

(3) Based on verbal guidance provided by MDEQ, hourly emission rates for emergency and intermittent equipment can be annualized for NOx by multiplying the actual calculated hourly rate by annual hours / 8760 hours. For PTE, the adjustment would be 500 / 8760.

Generators will operate during main power disruptions to support facility operations of tailings slurry pump, concentrate and tailings thickeners and key operations in both the oxide and flotation mills.

While a specific unit has not been selected, it will be similar to 1500 kW generators manufactured by Caterpillar. Emission calculations are based on a specification sheet for the Caterpillar 3512C diesel generator.

Emission Factor Maximum

Emissions

Relative Potency Factor 4

Relative Maximum Hourly Emission Rate (lb/hr) 4





Fire Pump

Emergency Fire Pump Engine Vented to SV-08

The fire engine pump will be located adjacent the fresh water tank just south of the oxide plant building as shown on Fig. 3-2.Fire pump engine is a Clarke Fire Protection Products, Inc. fire pump driver Model JU4H-UF22.

Engine Data:Fuel Consumption @ 100% load: 3.6 gph, Diesel (info from Clarke engineering data sheet)Heating value of diesel: 137,000 Btu/galEngine Rating 75 hpMaximum hours of operation per year 1: 500 hours

Emission Emission

Relative Potency Factor 3

Relative Maximum Hourly Emission Rate (lb/hr) 3

Criteria Pollutants Factor Organic Pollutants Factor(lb/MMBtu) (lb/hr) 2 (tpy) (lb/MMBtu) (lb/hr) 2 (lb/year)

Benzene 9.33E-04 4.60E-04 2.30E-01NOx 4.41 0.12 0.54 Toluene 4.09E-04 2.02E-04 1.01E-01CO 0.95 0.47 0.12 Xylenes 2.85E-04 1.41E-04 7.03E-02SOx 0.29 0.14 0.04 Propylene 2.58E-03 1.27E-03 6.36E-01PM10 0.31 0.15 0.04 1,3-Butadiene 3.91E-05 1.93E-05 9.64E-03Aldehydes 0.07 0.035 0.01 Formaldehyde 1.18E-03 5.82E-04 2.91E-01TOC Acetaldehyde 7.67E-04 3.78E-04 1.89E-01

Exhaust 0.35 0.17 0.04 Acrolein 9.25E-05 4.56E-05 2.28E-02Evaporative 0.00 0.00 0.00 Polycyclic aromatic hydrocarbons (PAH)Crankcase 0.01 0.0049 0.001 Naphthalene 8.48E-05 4.18E-05 2.09E-02Refueling 0.00 0.00 0.00 Acenaphthylene 5.06E-06 2.50E-06 1.25E-03

Total TOC (assumed to represent VOC) 0.178 0.044 Acenaphthene 1.42E-06 7.00E-07 3.50E-04Fluorene 2.92E-05 1.44E-05 7.20E-03Phenanthrene 2.94E-05 1.45E-05 7.25E-03Anthracene 1.87E-06 9.22E-07 4.61E-04Fluoranthene 7.61E-06 3.75E-06 1.88E-03Pyrene 4.78E-06 2.36E-06 1.18E-03Benzo(a)anthracene * 1.68E-06 8.29E-07 4.14E-04 0.1 8.29E-08Chrysene * 3.53E-07 1.74E-07 8.70E-05 0.01 1.74E-09Benzo(b)fluoranthene * 9.91E-08 4.89E-08 2.44E-05 0.1 4.89E-09Benzo(k)fluoranthene * 1.55E-07 7.64E-08 3.82E-05 0.1 7.64E-09Benzo(a)pyrene * 1.88E-07 9.27E-08 4.64E-05 1 9.27E-08Indeno(1,2,3-cd)pyrene * 3.75E-07 1.85E-07 9.25E-05 0.1 1.85E-08Dibenz(a,h)anthracene * 5.83E-07 2.88E-07 1.44E-04 1.1 3.16E-07Benzo(g,h,l)perylene 4.89E-07 2.41E-07 1.21E-04

Total PAH 1.68E-04 8.29E-05 4.14E-02Source of emission factors: AP-42, Tables 3.3-1 & 3.3-2 (October 1996 update)* Items with an asterisk are listed PAH carcinogens. (1) Number of operating hours based on those presented in EPA memo dated Sept. 6, 1995 regarding the calculation of PTE from emergency generators.(2) Based on verbal guidance provided by MDEQ, hourly emission rates for emergency and intermittent equipment can be annualized for NOx by multiplying the actual calculated hourly rate by annual hours / 8760 hours. For PTE, the adjustment would be 500 / 8760. (3) Pursuant to the MDEQ PAH guidance document Screening Levels for Polycyclic Aromatic Hydrocarbon s, dated November 4, 2015, emissions in lb/hr have been adjusted using the Relative Potency Factors (RPF) provided in the guidance document to allow for screening using the Allowable Emission Rate Methodology under Rule 227 (1) (a).

The fire pump engine will only operate during an emergency situation if a fire should occur at the facility. The engine would pump water from the fresh water tank to support fire-fighting operations.

Maximum Emissions

Maximum Emissions





Michigan PM and NSPS Limits Evalution

Emergency GeneratorsFacility Stacks1

Michigan Rule 336.1402 Emissions of sulfur dioxide from fuel-burning sources other than power plantsMichigan Rule 336.1331 PM Limits Evaluation

SV-01A SV-01B SV-02A SV-02B SV-02C SV-04 SV-06A SV-06B SV-07 SV-08Limit in lb PM per 1000 lb exhaust gas 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 Limit 1.7 lb SO2 pe

S = 32Stack exhaust rate - cfm 5000 3000 21000 21000 3000 4700 11000 11000 150 630 Fuel usage at 100% load= 57.3 gal/hr (See SO2 = 64

Fuel density= 7.1 lb/galscfm 5000 3000 21000 21000 3000 4700 4240 4240 118 496 Fuel heat rating= 19300 Btu/lb for diesel

Heat Input= 7851819 Btu/hr Calculate pounds gas: Unit conversion = 1000000 Btu/mm Btu

temperature - °F 60 60 60 60 60 60 889 889 200 200 Heat Input= 7.85 mm Btu/hrpressure - atm 1 1 1 1 1 1 1 1 1 1

density - lb/cf 0.075 0.075 0.075 0.075 0.075 0.075 0.075 0.075 0.075 0.075 Ultra Low Sulfur Diesel Fuel 15 ppm sulfur

Ventilation exhaust rate - lb/min 375 225 1575 1575 225 353 825 825 11 47 Sulfur emissionslb/hr 22500 13500 94500 94500 13500 21150 49500 49500 675 2835 Fuel usage at 100% load= 57.3 gal/hr

Hourly rate - 1000 lb exhaust gas 22.5 13.5 94.5 94.5 13.5 21.2 49.5 49.5 0.7 2.8 Fuel density= 7.1 lb/galFuel usage at 100% load= 406.8 lb/hr

PM Emission Sources:Emission rate of S at 15 ppm= 0.00610 lb/hr S

Stack Emissions1- lb PM/hr 0.018 0.005 0.003 0.054 0.001 0.265 0.133 0.133 0.005 0.153 0.5 lb S per lb SO2

PM concentration = Emission rate of SO2 = 0.0122 lb SO2/hrM hourly rate / Ventilation exhaust hourly rate

Comparative Value = 0.0016 lb SO2/mm Btu fuel inputPM rate (lb PM per 1000 lb gas)= 0.0008 0.0004 0.0000 0.001 0.0001 0.0126 0.003 0.0027 0.0077 0.054Does stack meet Table 31 Limit? Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Does generator meet SO2 limit? Yes

1 These hourly emission rates are detailed on the Summary PM, Toxics worksheet. SV-03 has no PM emissions; SV-05 is an exempt stack.

1 m3/second = 2119 cfm (conversion factor from m3/sec to cfm)1 cfm = 1.70 m3/hour (conversion factor from cfm to m3/hour)

From Air Dispersion Model Inputs

Stack stack Stack StackDiameter area Exit Velocity flow flow Gas Temp

(m) 1 m2 (m/s) m3/s cfm (°K)

SV-01A Flotation Primary Crushing 0.6 0.29 8.1 2.36 5000 289

SV-01B Flotation Mill Feed System 0.3 0.07 19.4 1.42 3000 289SV-02A Oxide Primary Crushing 1.0 0.79 12.5 9.91 21000 289

SV-02BOxide Secondary &

Tertiary Crushing 1.0 0.79 12.5 9.91 21000 289

SV-02C Oxide Mill Feed System 0.3 0.07 19.4 1.42 3000 289SV-03 Mercury Retort 0.08 0.005 10.4 0.05 100 629SV-04 Refinery Furnace 0.38 0.11 19.5 2.22 4700 289SV-05 Lime Silo 0.30 0.07 3.6 0.26 560 289

SV-06A Emergency Generator A 2 0.23 0.04 126.5 5.19 11000 673

SV-06B Emergency Generator B 2 0.23 0.04 126.5 5.19 11000 673

SV-07 A,B,C,D,E Five LPG Space Heaters 3 0.15 0.02 3.9 0.07 150 363SV-08 Fire Pump Engine 4 0.08 0.00 65.2 0.30 630 816

Stack data from drawing 5059-110-GEDSK-0003_05Sep18.pdf

molecular weight

EmissionSource





Air Dispersion Model Inputs

Aquila Resources Air Dispersion Model Input Data - Emission Rates of Criteria Pollutants

Point Sources

Stack Height Stack Stack Rain Stack Stack PM10 PM10 PM2.5 PM2.5 NO2 NO2 SO2 SO2 CO COAbove Ground Level Orientation Diameter Hat Exit Velocity Gas Temp

(m) 1 (m) 1 (m/s) (°K) (lb/hr) (g/sec) (lb/hr) (g/sec) (lb/hr) (g/sec) (lb/hr) (g/sec) (lb/hr) (g/sec)

SV-01A Flotation Primary Crushing Plant 20.4 Vertical 0.61 N 8.1 289 0.0068 0.00086 0.0021 0.00026SV-01B Flotation Mill Feed System 17.7 Horizontal 0.30 NA 19.4 289 0.0019 2.41E-04 0.00057 0.000072SV-02A Oxide Primary Crushing Plant 25.3 Vertical 1.01 N 12.5 289 0.0012 1.48E-04 0.00035 4.45E-05SV-02B Oxide Secondary and Tertiary Crushing 22.6 Vertical 1.01 N 12.5 289 0.020 0.0025 0.0060 7.57E-04SV-02C Oxide Mill Feed System 20.4 Horizontal 0.30 NA 19.4 289 0.00039 4.87E-05 0.00012 1.46E-05SV-03 Mercury Retort 16.5 Vertical 0.08 N 10.4 629 7.13E-05 8.98E-06 7.13E-05 8.98E-06SV-04 Refinery Furnace 17.4 Vertical 0.38 N 19.5 289 0.22 2.79E-02 0.16 2.02E-02SV-05 Lime Silo 17.7 Vertical 0.30 N 3.6 289 0.0022 2.76E-04 0.0008 9.74E-05SV-06A Emergency Generator A 2 3.7 Vertical 0.23 N 126.5 673 0.13 1.67E-02 0.13 1.67E-02 1.39 0.175 0.024 3.07E-03 2.1 0.268SV-06B Emergency Generator B 2 3.7 Vertical 0.23 N 126.5 673 0.13 1.67E-02 0.13 1.67E-02 1.39 0.175 0.024 3.07E-03 2.1 0.268

SV-07 A,B,C,D,EFive LPG Space Heaters 3 (emission rates are per heater, not aggregate) 3.7 Vertical 0.15 N 3.9 363 0.0052 6.58E-04 0.0052 6.58E-04 0.097 0.0122 0.00061 7.63E-05 0.056 0.0070

SV-08 Fire Pump Engine 4 3.7 Vertical 0.08 N 65.2 816 0.15 1.93E-02 0.15 1.93E-02 0.12 0.0156 0.14 0.01802 0.47 0.059

Volume Sources 5

Initial Horizontal Initial Vertical PM10 PM10 No. of Volume PM10 Rate PM2.5 PM2.5 PM2.5 RateVolume Volume Release Dimension Dimension Emissions Emissions Source per Volume Emissions Emissions per Volume

Height (m) Width (m) Height (m) (m) (m) (lb/hr) (g/sec) Segments (g/sec) (lb/hr) (g/sec) (g/sec)

ROM Material Handling and Transfer (CAT 777G and CAT 990H) 6, 7 N/A N/A 4.3 1.20 2.2 0.089 0.0112 1 0.013 1.69E-03FLOTPC Flotation Primary Crushing Fugitives 8 N/A N/A 7.0 4.3 6.5 0.013 0.002 3 5.30E-04 0.0038 0.0005 0.0002FLOTMILL Flotation Mill Transfer Feeders Fugitives 9 NA N/A 0.8 0.21 0.21 0.0044 0.00056 1 0.0013 0.0002FLOTSAG Flotation Ore to SAG Drop Point 10a N/A N/A 8.5 0.21 0.21 0.00040 0.000051 1 0.00012 1.52E-05OXIDEPC Oxide Primary Crushing Fugitives 10b N/A N/A 6.5 0.21 0.21 0.0026 0.00032 1 0.00077 9.66E-05OXIDESEC Oxide Secondary and Tertiary Crushing Fugitives 10b N/A N/A 6.5 0.21 0.21 0.0040 0.00051 1 0.0012 1.53E-04OXIDEMILL Oxide Mill Transfer Feeders Fugitives 11 N/A N/A 10.35 6.3 9.6 0.0009 0.00011 1 0.00027 3.35E-05OXIDEBALLMILL Oxide Ore Ball Mill Transfer Point 11 N/A N/A 10.35 6.3 9.6 0.0041 0.00052 1 0.0012 1.56E-04CONCT Concentrate Load-Out - Flotation Building 12 N/A N/A 5.65 6.3 5.3 0.0015 0.00019 1 0.00046 5.82E-05REAG 1 to 4 Reagent Building 13 N/A N/A 5.95 4.2 5.5 0.0018 0.0002 4 5.68E-05 0.00063 7.95E-05 1.99E-05HRSP Haul Road - Pit (Ore) to Storage Piles (CAT 777G) 14 9.4 11.5 4.7 11.5 10.7 4.4 0.29 0.0369 60 6.14E-04 0.029 0.004 6.14E-05HRNWRF Haul Road - Pit (WR) to NWRF (CAT 777G) 14 9.4 11.5 4.7 11.5 10.7 4.4 1.31 0.1646 80 2.06E-03 0.131 0.016 2.06E-04HRSWRF Haul Road - Pit (WR) to SWRF (CAT 777G) 14 9.4 11.5 4.7 11.5 10.7 4.4 0.26 0.0322 33 9.75E-04 0.026 0.003 9.75E-05HRTMF Haul Road - Pit (WR) to TMF (CAT 777G) 14 9.4 11.5 4.7 11.5 10.7 4.4 0.30 0.0384 46 8.35E-04 0.030 0.004 8.35E-05HRROM Haul Road - Storage Piles to ROM Pad (CAT 777G) 14 9.4 11.5 4.7 11.5 10.7 4.4 0.130 0.0164 33 4.96E-04 0.013 0.002 4.96E-05

FELROMHaul Road - FE Loader ROM Pile to Feed Hopper on ROM Pad (CAT 990H) 15 10.2 10.1 5.1 10.1 4.7 4.7 0.021 0.0027 1 2.66E-03 0.0021 0.0003 2.66E-04

HRCONCHaul Road - Mill Bldg. to Main Gate (Semi-Trailer Truck with Cu/Pb/Zn Concentrate) 16 10 8.5 5.0 8.5 7.9 4.7 0.050 0.0063 89 7.074E-05 0.0050 0.001 7.07E-06

Area Sources

PM10 PM10 PM10 PM2.5 PM2.5 PM2.5 NO2 NO2 NO2 CO CO CO SO2 SO2 SO2X-Axis Y-Axis Release Initial Area Area Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions

Length (m) Length (m) Height (m) Vertical (m) (m2) (ft2) (lb/hr) (g/sec) (g/m2-sec) (lb/hr) (g/sec) (g/m2-sec) lb/hr g/sec g/m2-sec lb/hr g/sec g/m2-sec lb/hr g/sec g/m2-sec

630 500 35.8 N/A 315,000 3.5 0.44 1.40E-06 0.40 0.050 1.58E-07 10.2 1.29 4.09E-06 968 121.97 0.0003872 1.20 0.15 4.82E-07

425 265 21 19.5 112,625 0.39 0.05 4.33E-07 0.12 0.015 1.30E-07EOP - East Ore Pad Wind Erosion and Material Handling Not applicable to Polygon shape 20 18.6 53,416 574,970 0.53 0.07 1.26E-06 0.14 0.018 3.38E-07

65.3 198.8 20 18.6 12,982 139,734 0.15 0.02 1.43E-06 0.038 0.005 3.64E-07Not applicable to Polygon shape 26 24.2 471,717 5,077,562 0.61 0.08 1.62E-07 0.080 0.010 2.13E-08Not applicable to Polygon shape 32.5 30.2 209,587 2,255,994 0.28 0.04 1.71E-07 0.037 0.005 2.25E-08Not applicable to Polygon shape 21 19.5 433,541 4,666,635 0.24 0.03 7.04E-08 0.032 0.004 9.27E-09

107.13

EmissionSource

Emission Adjusted Road Width

NWRF_WRM - Waste Rock Management - NWRF 18

SWRF_WRM - Waste Rock Management - SWRF 18

TMF_WRM - Waste Rock Management - TMF 18

WOP - West Ore Pad Wind Erosion and Material Handling

Source

Emission Source

Open Pit - Drilling, Blasting, Ore Handling, Haul Road Traffic (Open Pit Algorithm Area Source) 17

TMF_WIND - Wind Erosion Tailings Management Facility 18









Building Dimensions

X-Axis Y-AxisBldg/Structure Bldg/Structure Bldg/Structure

Length (m) Width (m) Height (m) Area (m2) Easting (m) Northing (m)

TRUCK Truck Shop 30 75.5 6.8 2265 435787.9 5032875WARE Warehouse 20 51.5 6.8 1030 435788.2 5032951.4MAINT Maintenance Shop & Warehouse 28 51.5 6.8 1442 435788 5032722

CHANGE Change Facility 12 27.6 3.3 331.2 435787.9 5032694.1ADMIN Administration Building 12 41 3.3 492 435788.5 5032647.3EXPLO Explosives Storage 2.4 12 2.7 28.8 436553.7 5032775.9WWTP Waste Water Treatment 47.5 16.6 12 788.5 435677.1 5032576.3

OX1CRUSH Oxide Primary Crushing 35.9 30.5 23.7 1094.95 435903.5 5032987.8OX2CRUSH Oxide Secondary Crushing 30.5 24 18.5 732 435908.9 5032937.9FL1CRUSH Floatation Primary Crushing 6.6 22.9 12.6 151.14 435961.2 5032989.8

OXMILL Oxide Milling Building 30 16 20.7 480 435887.3 5032717.1FLOMILL Flotation Milling BUilding 36 26 26.5 936 435943 5032715

FLOSTOCK Flotation Stockpile Building 54 55 21 2970 435937.1 5032844.1REAGENT Reagent Building 60 18 11.9 1080 435953.7 5032634.6

GOLD Gold Room 35.8 16.9 13.9 605.02 435891.6 5032640MERCROC2 Merrill Crowe Circuit Bldg2 17.7 6 11.2 106.2 435928.6 5032641MERCROC1 Merrill Crowe Circuit Bldg1 5.3 5.6 12.4 29.68 435932.8 5032647.5CONCHAND Concentrate Handling 21 60 11.3 1260 436037.9 5032642.7

FILTER Filtration Building 7 60 19 420 436020.2 5032656FLOTPOT Flotation/Potable Water Treatment 84 28 21.1 2352 435891.1 5032676.4

TRUCKWAS Truck Wash 13 20 6.8 260 435746.9 5033022GATEHOUS Gatehouse 15.2 6.1 3.3 92.72 435780.1 5032598.2FIRSTAID First Aid Station 8 15 3.3 120 435790.3 5032606.7ELECTRIC HV/ MV Switch Building 24 12 9 288 436042.8 5032783.3

Notes:

(2) The emergency generators will operate as needed a maximum of 500 hours per year. Both emergency generators will be located on the southeast corner of the main power station building; see Fig. 3-2.

(19) Dimensions for buildings were provided by Lycopodium.

(17) The open pit area source was modeled as an area source using the open pit algorithm available in AERMOD. The input parameter for the pit volume was 20,900,000 m3, which is the volume at mid-life of the pit area. Emissions were assumed to be 100 meters from the base of the pit. Per requirements for modeling an open pit source, the pit was configured as a rectangle that represents the effective area of the actual pit.

(18) The TMF, SWRF, and NWRF areas were modeled as area sources. Each facility will be constructed in a series of lifts over the seven year life of the mine. While perimeter of the TMF will be waste rock, tailings will be pumped into cells located in the center of the TMF. Particulate emissions due to wind erosion were estimated from the tailings cells only. Particulate emissions due to placement of waste rock and vehicle travel were estimated over the entire area of each facility. The average height of each facility was calculated as 60% of the maximum height, and used as the release height. Thus average heights were calculated as 25.2 meters (42 m maximum) for the TMF, 39 meters (65 m maximum) for the SWRF, 31.2 meters (52 m maximum) for the NWRF. Given activities will occur over the entire area of each facility, the entire footprint of each facility was used in calculating the square area.

(7) [this is not used in the model, since truck dimensions are used. do we keep this footnote?] To estimate emissions from a FE loader to a pile, the inputs for truck loading with FE loader were used. For the release height, it was assumed the FE loader bucket will drop at about 4 feet in height or 1.2 meters. The initial horizontal dimension is the width of the bucket = 3.5 meters / 4.3 = 0.81 meters. The initial vertical dimension is the height of the drop = 1.2 / 4.3 = 0.28 meters.

(8) This represents remaining particulate emissions that are not captured by the local exhaust ventilation systems in the building. It is modeled as a volume source and divided into three sections. For each volume source, the release height = 14 / 2 = 7.0 meters. The initial horizontal dimension = 18.3 / 4.3 = 4.3, while the initial vertical dimension = 14 / 2.15 = 6.5 meters.

(11) To estimate emissions from a drop point inside the building, it will be assumed the emissions will be released inside the building. Therefore, the release height for oxide mill building is the height of the building = 20.7 meters / 2 = 10.35 meters. The initial horizontal dimension = 27 / 4.3 = 6.3 meters, while the initial vertical dimension = 20.7 / 2.15 = 9.6 meters. For the flotation mill building, the release height = 21.1 / 2 = 10.55 meters. The initial horizontal dimension = 27 / 4.3 = 6.3 meters, while the initial vertical dimension = 21.1 / 2.15 = 9.8 meters.

(12) Emissions from the concentrate load-out area in the flotation building include particulate emissions from dropping flotation concentrate from a hopper into super sacks. This emission source is minimal due to enclosure of the drop point and the fact the material is 10-12% moisture. It is nonetheless included in air dispersion modeling to be conservative. For purposes of modeling, it is assumed it would be a volume source that includes just the south end of the building. The volume is one source that includes release of the emissions from the roof of the building. The release height is the midpoint of the building height = 11.3 / 2 = 5.65 meters. The initital horizontal dimension is the building width = 27 / 4.3 = 6.3 meters. The initial vertical dimension is the building height = 11.3 / 2.15 = 5.3 meters. Given only the south end of the building was assessed, only one volume source was used.

(13) Emissions from the reagent building include particulate emissions from mixing of reagents. While these sources are exempt sources, they are being included in air dispersion modeling to be conservative. Modeling for TACs associated with reagent mixing was not required. For purposes of modeling, it is assumed emissions would come from the entire building. Therefore, the building was divided into four volume sources using MDEQ guidance for setting up volume sources associated with release of emissions from building roofs/vents. The release height is the midpoint of the building height = 11.9 / 2 = 5.95 meters. The initial horizontal dimension of each volume source is 18 / 4.3 = 4.2 meters. The initial vertical dimension of each volume source is 11.9 / 2.15 = 5.5 meters.

(14) Haul road calculations are based on estimation of vehicle height, volume width, release height, initial lateral dimension and initial vertical dimension. Based on use of a CAT 777G truck hauler, the height is 4.7 meters, the width is 5.5 meters and length 10.5 meters. Given this information, the volume height is 4.7 * 2 = 9.4 meters, with the volume width being the truck width + 6 meters = 5.5 + 6 = 11.5 meters. The release height = volume height / 2 = 9.4 / 2 = 4.7 meters. For alternating volume sources, the initial horizontal dimension = 2 X the adjusted road width / 2.15 = 23 / 2.15 = 10.7 meters, with the initial vertical dimension = height of the volume / 2.15 or 9.4 / 2.15 = 4.4 meters.

(15) This included estimation of vehicle height, volume width, release height, initial lateral dimension and initial vertical dimension. Based on use of a CAT 990H FE loader, the height is 5.1 meters, the width is 4.1 meters and length 12.8 meters. Given this information, the volume height is 5.1 * 2 = 10.2 meters, with the volume width being the loader width + 6 meters = 4.1 + 6 = 10.1 meters. The release height = volume height / 2 = 10.2 / 2 = 5.1 meters. The initial horizontal dimension = the volume width / 2.15 = 10.1 / 2.15 = 4.7 meters, with the initial vertical dimension = height of the volume / 2.15 or 10.2 / 2.15 = 4.7 meters.

(10a) To estimate this volume source, the release height was the height of the flotation stockpile = 17 / 2 = 8.5 meters. The initial horizontal dimension is the width of the conveyor = 3 feet = 0.91 meters / 4.3 = 0.21 meters. The initial vertical dimension is the drop distance = 3 feet = 0.91 meters / 4.3 = 0.21 meters.

(10b) To estimate this volume source, the release height was the height of the oxide stockpile = 13 /2 = 6.5 meters. The initial horizontal dimension is the width of the conveyor = 3 feet = 0.91 meters / 4.3 = 0.21 meters. The initial vertical dimension is the drop distance = 3 feet = 0.91 meters / 4.3 = 0.21 meters.

(9) This represents particulate emissions vented from the transfer tower. The transfer conveyor is assumed to be 1.5 meters above the above, with the release height being 1.5 / 2 = 0.75. The initial horizontal dimension is the width of the conveyor = 3 feet = 0.91 meters / 4.3 = 0.21 meters. The initial vertical dimension is the drop distance = 3 feet = 0.91 meters / 4.3 = 0.21 meters.

(16) This included estimation of vehicle height, volume width, release height, initial lateral dimension and initial vertical dimension. Based on use of bulk product haul truck, the height is 16 feet (including trailer + distance from ground) or 5 meters. The width is 8.3 feet or 2.5 meters. The overall length (including trailer and cab) is 38 feet or 11.6 meters. Given this information, the volume height is 5 * 2 = 10 meters, with the volume width being the truck width + 6 meters = 8.5 meters. The release height = volume height / 2 = 10 / 2 = 5 meters. For alternating volume sources, the initial horizontal dimension = 2 X the adjusted road width / 2.15 = 17 / 2.15 = 7.9 meters, with the initial vertical dimension = height of the volume / 2.15 or 10 / 2.15 = 4.7 meters.

UTMCoordinatesBuilding

Name 19

(5) All volume sources were calculated based on the MDEQ guidance document entitled Air Dispersion Modeling Guidance Document dated September 2009. (6) To estimate emissions from a truck unloading materials to a pile, the release height was the height of the truck bed (4.3 meters), the initial horizontal dimension is width of truck, or 5.2 / 4.3 = 1.2 meters; the initial vertical dimension is height of truck, or 4.7 / 2.15 = 2.2 meters.

(3) Five 200kW propane space heating units will be installed at five different locations. The heating unit model designation has not been identified, thus AP-42 emission factor are used in this evaluation.(4) The fire pump engine will be located in a structure situated in a structure adjacent the fire water tank.

(1) Point source stack parameters (height, diameter, flow rate, and temperature) were provided by Lycopodium, as depicted in Figure 2 of the modeling protocol update dated September 2018.






Length (m) Width (m) Height (m) Oxide Crushing Building (Steel Frame) 30.5 35.9 23.7 Buildings added to dispersion modelOxide Crushing Double Screen Building (Steel Frame) 30.5 24 18.5Crushing Buildings Oxide & Sulphide MCC (Modular) 12 6.1 3.6Sulphide Crushing Building (Steel Frame) 22.9 6.6 12.6 FlotationSulphide Milling Building (Steel Frame) 36 26 26.5Sulphide Milling Lean Too (Steel Frame) 6 12 7.8Sulphides Area MCC (Modular) 31.9 9 3.2Sulphide Stockpile Building (Fabric Frame) 54 55 21Sulphide Milling Pipe Rack 19.5 6.1 3.2Oxide Milling Building (Steel Frame) 30 16 20.7Oxide Milling Lean Too (Steel Frame) 6.2 12.4 8.7Oxides Area MCC (Modular) 19.5 6.1 3.2Flotation Building/ Potable Water Treatment (Steel Frame) 28 84 21.1Filtration Building (Steel Frame) 7 60 19Filtration Lean Too (Steel Frame) 8.5 5.5 5.4Concentrate Handling Building (Steel Frame) 21 60 11.3Concentrate Transport Truck Wash 8.5 5.5 5.4Merrill Crowe Circuit Building 1 (Steel Frame) 5.6 5.3 12.4Merrill Crowe Circuit Building 2 (Steel Frame) 17.7 6 11.2Gold Room 16.9 35.8 13.9Sulphide Tailings Reagents Building (Steel Frame) 12.5 6.9 6.7Reagent Building (Steel Frame) 18 60 11.9HV/ MV Switch Building (Modular) 24 12 9Guard House 6.1 15.2 3.3First Aid Station (Modular) 15 8 3.3Administration Building (Modular) 41 12 3.3Change Facility (Modular) 27.6 12 3.3Maintenance Shop & Warehouse (Steel Frame) 51.5 28 6.8Truck Shop (Steel Frame) 75.5 30 6.8Warehouse (Steel Frame) 51.5 20 6.8Fuel Station (Steel Frame) 25 15 6.8Truck Wash (ore trucks) 20 13 6.8Truck Scale Station (Modular) 1.5 1.5 2.7Explosives Storage and Magazine Storage (Steel Frame) 12 2.4 2.7Waste Water Treatment Plant (Steel Frame) 47.5 16.6 12Sewage Treatment Plant (Steel Frame) 12 2.4 2.7Pumphouse for CWBs (Modular) 6 2.4 2.7Effluent Pumphouse (Modular) 6 2.4 2.7

FUEL Fuel Station 435617.6 5033106.4 230 11.81102 23.9 14.6 90TRUCK Truck Shop 435617.6 5033029 230 52.49344 21 46.4 0MINING Mining Equipment Storage Area 435617 5032963.1 229.47 19.68504 30.3 59.5 0.6CRUSH Crushing Plant Building 435741.2 5032999.3 230.93 45.93176 17.4 51 0POWER Main Power Substation 435811.2 5032848.3 232.61 9.84252 32.6 59.5 0.5FPASTE Flotation Paste Plant 435802.2 5032773.8 233.03 9.84252 21 46 -0.8OPASTE Oxide Paste Plant 435823.8 5032797 233.38 9.84252 11 23.5 -1.6MAINT Maintenance Shop 435807.7 5032711.8 233.98 19.02887 17.1 29.5 0PROCESS Flotation and Oxide Plant Buildings 435719.3 5032731.2 231.59 98.42519 53.2 91 -0.6REAG Reagent Building 435724.8 5032707.3 232 15.74803 41.3 17.5 0ADMIN Administration Building 435617.6 5032669.2 230.81 9.84252 28.8 17 0CHANGE Change Facility 435657 5032674.7 231.34 9.84252 23.2 11.5 -0.7FIRST First Aid 435709.9 5032683.4 231.78 9.84252 14.9 5.5 -1.2LAB Laboratory 435709.6 5032663.4 233.39 9.84252 34.8 11.5 0WARE Warehouse 435645.4 5032624.1 234.42 19.68504 35.8 23.5 -0.5WTP Water Treatment Plant 435649.3 5032712.1 230.35 29.85564 29.3 10 -0.8


TOXIC AIR CONTAMINANTSAllowable Emission Rate Methodology - Rule 227 (1) (a) 1-hr Y lbs/hr

8-hr N lbs/8-hr24-hr lbs/24-hr

Facility Name: annual lbs/month

Facility Address:Geocoordinates (if known):

ITSL µg/m³

ITSL Avg Time

IRSL or SRSLµg/m³

lbs permonth,24-hr,8-hr

or 1-hr

Maxlbsper

hour

lbs per

month

Maxlbsper

hourRate

Rate Units

Max Hourly ER

lbs/hour

Screening Level

Specific ERMax Hourly

RateAntimony 7440-36-0 0.2 annual 8 0.108 1.94E+00 lbs/month 2.69E-03 yes yesArsenic 7440-38-2 0.002 0.08 0.00108 3.80E+01 lbs/month 5.27E-02 no noBarium 7440-39-3 5 8-hr 35 0.1 0.1 4.34E-01 lbs/8-hr 5.42E-02 no yesBeryllium 7440-41-7 0.02 24-hr 0.0024 0.001 3.34E-03 lbs/24-hr 1.39E-04 no yesBeryllium 7440-41-7 0.004 0.16 0.00216 1.00E-01 lbs/month 1.39E-04 yes yesCadmium 7440-43-9 0.006 0.24 0.00324 5.81E+00 lbs/month 8.07E-03 no noCerium 7440-45-1 6 annual 240 3.24 2.91E+00 lbs/month 4.04E-03 yes yesChromium, Trivalent 16065-83-1 5 8-hr 17 0.1 0.1 7.41E-02 lbs/8-hr 9.27E-03 yes yesCobalt 7440-48-4 0.2 8-hr 0.004 0.004 5.01E-03 lbs/8-hr 6.26E-04 no yesCobalt 7440-48-4 0.00031 0.0124 0.0001674 4.51E-01 lbs/month 6.26E-04 no noCopper 7440-50-8 2 8-hr 0.04 0.04 7.74E-01 lbs/8-hr 9.67E-02 no noLithium 7439-93-2 35 24-hr 4.2 1.75 8.91E-03 lbs/24-hr 3.71E-04 yes yesMagnesium 7439-95-4 100 8-hr 2 2 1.36E+00 lbs/8-hr 1.71E-01 yes yesManganese 7439-96-5 0.3 annual 29 12 0.162 6.96E+00 lbs/month 9.67E-03 yes yesMercury 7439-97-6 0.3 annual 7 12 0.162 1.45E+00 lbs/month 2.02E-03 yes yesMercury 7439-97-6 1 24-hr 0.12 0.05 4.84E-02 lbs/24-hr 2.02E-03 yes yesMolybdenum 7439-98-7 30 8-hr 0.6 0.6 1.31E-02 lbs/8-hr 1.64E-03 yes yesNickel 7440-02-0 0.058 2.32 0.03132 6.26E-01 lbs/month 8.69E-04 yes yesSelenium 7782-49-2 2 8-hr 34 0.04 0.04 1.10E-03 lbs/8-hr 1.37E-04 yes yesSilver - soluble 7440-22-4 0.1 8-hr 0.002 0.002 3.14E-02 lbs/8-hr 3.93E-03 no noStrontium 7440-24-6 150 24-hr 26 18 7.5 1.85E-01 lbs/24-hr 7.72E-03 yes yesThallium 7440-28-0 0.2 8-hr 0.004 0.004 4.10E-03 lbs/8-hr 5.13E-04 no yesThallium 7440-28-0 0.1 annual 4 0.054 3.69E-01 lbs/month 5.13E-04 yes yesTin 7440-31-5 20 8-hr 0.4 0.4 6.74E-03 lbs/8-hr 8.42E-04 yes yesPhosphorus (total) 7723-14-0 20 24-hr 2.4 1 2.53E-01 lbs/24-hr 1.06E-02 yes yesMIBC 108-11-2 1000 8-hr 20 20 0.0282 lbs/8-hr 0.00353 yes yesYttrium 7440-65-5 10 8-hr 0.2 0.2 1.31E-02 lbs/8-hr 1.63E-03 yes yes

29 - The ITSL for manganese is most appropriately applied to PM10-Mn data rather than TSP-Mn data. 26 - The combined ambient impact of all particulate TAC emissions must be below the applicable PM primary NAAQS. The total TAC emissions in lb/hr were used to make this evaluation. The primary NAAQS for PM is 150 µg/m3

In March 2019, screening level for cobalt was revised from an 8 hour ITSL to a more stringent IRSL. The revised cobalt screening level has not been published, however, was communicated to Aquila and its consultant by Andrew Drury. The screening evaluation for cobalt continues to show modeling is not necessary for this chemical.

Aquila Resources, Inc. Contact Name:Contact Phone Number:

Chemical Name CAS No.

Screening Level

AQ

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than AER?ITSL IRSL or SRSL

Contact Email Address:

Allowable Emission Rate (AER)

ProposedEmission Rate (ER)


TOXIC AIR CONTAMINANTSAllowable Emission Rate Methodology - Rule 227 (1) (a) 1-hr Y lbs/hr

8-hr N lbs/8-hr24-hr lbs/24-hrannual lbs/month

Facility Name:Facility Address:

Geocoordinates (if known):

ITSL µg/m³

ITSL Avg Time

IRSL or SRSLµg/m³

lbs permonth,24-hr,8-hr

or 1-hr

Maxlbsper

hour

lbs per

month

Maxlbsper

hourRate Rate Units

Max Hourly ER lbs/hour

Screening Level

Specific ERMax Hourly

RateBenzene 71-43-2 30 annual Y 1200 16.2 1.63E+01 lbs/month 2.27E-02 yes yesBenzene 71-43-2 30 24-hr Y 3.6 1.5 5.45E-01 lbs/24-hr 2.27E-02 yes yesBenzene 71-43-2 1 Y 40 0.54 16.34 lbs/month 2.27E-02 yes yesToluene 108-88-3 5000 24-hr Y 600 250 0.20 lbs/24-hr 8.26E-03 yes yesXylene 1330-20-7 390 annual Y 2 15600 210.6 4.08 lbs/month 5.67E-03 yes yesPropylene 115-07-1 8600 8-hr Y 172 172 0.65 lbs/8-hr 8.12E-02 yes yesFormaldehyde 50-00-0 30 24-hr Y 3.6 1.5 0.07 lbs/24-hr 2.84E-03 yes yesFormaldehyde 50-00-0 0.8 Y 32 0.432 2.05E+00 lbs/month 2.84E-03 yes yesAcetaldehyde 75-07-0 9 24-hr Y 1.08 0.45 2.64E-02 lbs/24-hr 1.10E-03 yes yesAcetaldehyde 75-07-0 5 Y 200 2.7 7.92E-01 lbs/month 1.10E-03 yes yesAcrolein* 107-02-8 5 1-hr Y 13 0.005 0.005 2.71E-04 lbs/hr 2.71E-04 yes yesAcrolein* 107-02-8 0.16 annual Y 13 6.4 0.0864 1.95E-01 lbs/month 2.71E-04 yes yesNaphthalene 91-20-3 3 annual Y 120 1.62 2.713 lbs/month 3.77E-03 yes yesNaphthalene 91-20-3 520 8-hr Y 10.4 10.4 0.030 lbs/8-hr 3.77E-03 yes yesNaphthalene 91-20-3 0.8 Y 32 0.432 2.713 lbs/month 3.77E-03 yes yesAcenaphthylene 208-96-8 35 24-hr Y 4.2 1.75 0.006 lbs/24-hr 2.67E-04 yes yesAcenaphthene 83-32-9 210 24-hr Y 25.2 10.5 3.24E-03 lbs/24-hr 1.35E-04 yes yesFluorene 86-73-7 140 24-hr Y 16.8 7 9.15E-03 lbs/24-hr 3.81E-04 yes yesPhenanthrene* 85-01-8 0.1 annual Y 4 0.054 8.52E-01 lbs/month 1.18E-03 yes yesAnthracene 120-12-7 1000 24-hr Y 120 50 8.68E-04 lbs/24-hr 3.62E-05 yes yesFluoranthene 206-44-0 140 24-hr Y 16.8 7 0.0029 lbs/24-hr 1.19E-04 yes yesPyrene 129-00-0 100 24-hr Y 12 5 2.6E-03 lbs/24-hr 1.09E-04 yes yesPAHs ** 0.006 Y 5 0.24 0.00324 1.87E-02 lbs/month 2.60E-05 yes yesBenzo(g,h,l)perylene 191-24-2 13 annual Y 520 7.02 3.88E-04 lbs/24-hr 1.62E-05 yes yes1-3 Butadiene 106-99-0 33 annual Y 1320 17.82 2.74E-02 lbs/24-hr 1.14E-03 yes yes1-3 Butadiene 106-99-0 0.3 Y 12 0.162 8.21E-01 lbs/month 1.14E-03 yes yes

* Acrolein and phenanthrene have annual ITSL screening thresholds, however, the allowable emission rate (AER) is expressed in lb/month with no annual rate available in this pre-programmed spreadsheet. To compare values, the Proposed Emission Rate (ER) has been expressed in a lb/month basis (lb/month = lb/hr * 720 hr/month)

** Per Note 5 in the Screening Level Footnotes, the seven carcinogenic polycyclic aromatic hydrocarbons (PAHs) identified from AP-42 for diesel emissions from the emergency generators and fire pump should be evaluated additively, utilizing the relative potency factors (RPF) approved by the AQD in its document Screening Levels for PAHs dated November 4, 2015. Table 3 of the Screening Level document provides an example of how this could be done. For screening purposes in this worksheet, the facility-wide maximum hourly emission rate for the seven carcinogenic PAHs were added together, adjusted using the appropriate RPF to develop a Relative Maximum Hourly Emission Rate for each compound. The facility-wide Relative Maximum Hourly Emission Rate was compared against the Secondary Risk Screening Level (SRSL) for benzo(a)pyrene of 0.006 µg/m3.

45.45144 N; -87.82728 W Contact Email Address: [email protected]

Chemical Name CAS No.

Screening Level

AQ

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AQ

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Allowable Emission Rate (AER) ProposedEmission Rate (ER)

Is Proposed Emission Rate less than AER?ITSL IRSL or SRSL

Aquila Resources, Inc. - Back Forty Project Contact Name: Dave AndersonRiver Road, Stephenson, MI Contact Phone Number:


mailto:[email protected]




Air Dispersion Model Input Data - Emission Rates of Michigan Toxic Air Contaminants and LeadFor Allowable Emission Rate Analysis under Rule 227(1)(c) and Rule 227(2)

Arsenic Copper Cadmium Lead Silver - Soluble% % % % %

Ore 0.297 0.664 0.064 2.95 0.031Waste Rock 0.022 0.008 0.0003 0.02 0.000

Tails 0.147 0.785 0.0019 0.06 0.002Cu Concentrate 0.0266 30.2 0.0153 3.35 0.04Zn Concentrate 0.021 0.617 0.328 0.27 0.01Pb Concentrate 0.08 10 0.328 38.70 0.08

Native Soils 0.00019 0.00045 0.000 0.00037 0.00

Point Sources

Emission

Source Arsenic Copper Cadmium Lead Silver - Soluble Units

SV01A Crushing Plant 6.74E-06 1.50E-05 1.45E-06 6.68E-05 7.02E-07 g/secSV01B Crushing Plant 1.95E-06 4.36E-06 4.20E-07 1.94E-05 2.04E-07 g/secSV02A Crushing Plant 1.15E-06 2.57E-06 2.47E-07 1.14E-05 1.20E-07 g/secSV02B Crushing Plant 2.03E-05 4.54E-05 4.37E-06 2.01E-04 2.12E-06 g/secSV02C Crushing Plant 3.95E-07 8.82E-07 8.49E-08 3.92E-06 4.12E-08 g/sec

Volume Sources

No. ofEmission Volume Source Source Segments Arsenic Copper Cadmium Lead Silver-Soluble Units

ROM 1 7.03E-05 1.57E-04 1.51E-05 6.96E-04 7.32E-06 g/secFLOTPC 3 4.22E-06 9.41E-06 9.05E-07 4.18E-05 4.39E-07 g/secFLOTMILL 1 4.54E-06 1.01E-05 9.74E-07 4.49E-05 4.72E-07 g/secFLOTSAG 1 4.12E-07 9.20E-07 8.85E-08 4.08E-06 4.29E-08 g/secOXIDEPC 1 2.49E-06 5.56E-06 5.34E-07 2.47E-05 2.59E-07 g/secOXIDESEC 1 4.10E-06 9.15E-06 8.80E-07 4.06E-05 4.27E-07 g/secOXIDEMILL 1 9.07E-07 2.02E-06 1.95E-07 8.99E-06 9.45E-08 g/secOXIDEBALLMILL 1 4.21E-06 9.39E-06 9.03E-07 4.17E-05 4.38E-07 g/secCONCT 1 1.21E-07 1.67E-05 1.61E-06 7.83E-06 5.04E-08 g/secHRSP 60 5.46E-09 1.29E-08 0.00E+00 1.06E-08 6.60E-11 g/secHRNWRF 80 1.83E-08 4.33E-08 0.00E+00 3.56E-08 2.21E-10 g/secHRSWRF 33 8.66E-09 2.05E-08 0.00E+00 1.69E-08 1.05E-10 g/secHRTMF 46 7.41E-09 1.76E-08 0.00E+00 1.44E-08 8.97E-11 g/secHRROM 33 4.40E-09 1.04E-08 0.00E+00 8.58E-09 5.33E-11 g/secFELROM 1 2.37E-08 5.60E-08 0.00E+00 4.61E-08 2.86E-10 g/secHRCONC 89 6.28E-10 1.49E-09 0.00E+00 1.22E-09 7.61E-12 g/sec

Area Sources

Emission Source Area Arsenic Copper Cadmium Lead Silver-Soluble UnitsOpen Pit 306,000 1.99E-09 3.26E-09 3.00E-10 1.40E-08 1.46E-10 g/m2-secTMF_WIND 112,625 9.45E-10 3.39E-10 1.42E-11 8.40E-10 7.26E-12 g/m2-secEOP - WIND 53,416 1.15E-08 2.57E-08 2.47E-09 1.14E-07 1.20E-09 g/m2-secWOP - WIND 12,982 1.26E-08 2.81E-08 2.71E-09 1.25E-07 1.31E-09 g/m2-secNWRF_WRM 471,717 1.21E-10 4.33E-11 1.82E-12 1.07E-10 9.28E-13 g/m2-secSWRF_WRM 209,587 1.27E-10 4.57E-11 1.92E-12 1.13E-10 9.79E-13 g/m2-secTMF_WRM 433,541 5.25E-11 1.88E-11 7.91E-13 4.66E-11 4.03E-13 g/m2-sec

Notes:1 Each Lead/Michigan air toxic concentration is for each volume source segment. Lead is included here although it is regulated as a federal criteria pollutant2 Lead and TAC emission rates are based on PM emission composition.





Air Deposition Model Input Data - Emission Rates of Selected Air Contaminants for Deposition Modeling

Mercury Copper Sulfur Lead Zinc% % % % %

Ore 0.0153 0.664 28.76 2.95 17.93Waste Rock 0.0001 0.008 2.32 0.02 0.13

Tails 0.0001 0.785 39.10 0.06 0.34Cu Concentrate 0.0053 30.2 29.90 3.35 2.53Zn Concentrate 0.0370 0.617 24.60 0.27 56.10Pb Concentrate 0.0370 10 29.90 38.70 4.86

Native Soils 8.90E-07 0.00045 0.004 0.00037 0.00183Point Sources

EmissionSource Mercury Copper Sulfur Lead Zinc Units

SV01A Crushing Plant 3.47E-07 1.50E-05 6.52E-04 6.68E-05 4.06E-04 g/secSV01B Crushing Plant 1.01E-07 4.36E-06 1.89E-04 1.94E-05 1.18E-04 g/secSV02A Crushing Plant 5.93E-08 2.57E-06 1.11E-04 1.14E-05 6.95E-05 g/secSV02B Crushing Plant 1.05E-06 4.54E-05 1.97E-03 2.01E-04 1.23E-03 g/secSV02C Crushing Plant 2.04E-08 8.82E-07 3.82E-05 3.92E-06 2.38E-05 g/sec

Volume SourcesNo. of

Emission Volume Source Source Segments Mercury Copper Sulfur Lead Zinc Units

ROM 1 3.62E-06 1.57E-04 6.79E-03 6.96E-04 4.24E-03 g/secFLOTPC 3 2.17E-07 9.41E-06 4.08E-04 4.18E-05 2.54E-04 g/secFLOTMILL 1 2.34E-07 1.01E-05 4.39E-04 4.49E-05 2.73E-04 g/secFLOTSAG 1 2.12E-08 9.20E-07 3.99E-05 4.08E-06 2.49E-05 g/secOXIDEPC 1 1.28E-07 5.56E-06 2.41E-04 2.47E-05 1.50E-04 g/secOXIDESEC 1 2.11E-07 9.15E-06 3.96E-04 4.06E-05 2.47E-04 g/secOXIDEMILL 1 4.67E-08 2.02E-06 8.77E-05 8.99E-06 5.47E-05 g/secOXIDEBALLMILL 1 2.17E-07 9.39E-06 4.07E-04 4.17E-05 2.54E-04 g/secCONCT 1 1.83E-07 1.67E-05 1.33E-04 7.83E-06 2.68E-04 g/secHRSP 60 2.56E-11 1.29E-08 1.28E-07 1.06E-08 5.26E-08 g/secHRNWRF 80 8.56E-11 4.33E-08 4.28E-07 3.56E-08 1.76E-07 g/secHRSWRF 33 4.06E-11 2.05E-08 2.03E-07 1.69E-08 8.34E-08 g/secHRTMF 46 3.47E-11 1.76E-08 1.74E-07 1.44E-08 7.14E-08 g/secHRROM 33 2.06E-11 1.04E-08 1.03E-07 8.58E-09 4.24E-08 g/secFELROM 1 1.11E-10 5.60E-08 5.54E-07 4.61E-08 2.28E-07 g/secHRCONC 89 2.94E-12 1.49E-09 1.47E-08 1.22E-09 6.05E-09 g/sec

Area Sources

Emission Source Area Mercury Copper Sulfur Lead Zinc UnitsOpen Pit 306,000 3.55E-11 1.60E-09 9.64E-08 6.83E-09 4.17E-08 g/m2-secTMF_WIND 112,625 4.55E-12 3.39E-10 9.92E-08 8.40E-10 5.40E-09 g/m2-secEOP - WIND 53,416 5.93E-10 2.57E-08 1.11E-06 1.14E-07 6.94E-07 g/m2-secWOP - WIND 12,982 6.49E-10 2.81E-08 1.22E-06 1.25E-07 7.60E-07 g/m2-secNWRF_WRM 471,717 5.82E-13 4.33E-11 1.27E-08 1.07E-10 6.90E-10 g/m2-secSWRF_WRM 209,587 6.14E-13 4.57E-11 1.34E-08 1.13E-10 7.29E-10 g/m2-secTMF_WRM 433,541 2.53E-13 1.88E-11 5.51E-09 4.66E-11 3.00E-10 g/m2-sec

Notes:1 Each constituent concentration is for each volume source segment. Lead is included here although it is regulated as a federal criteria pollutant2 Lead and TAC emission rates are based on PM emission composition.





Particle Size

Particle Density, Particle Size Diameters, and Associated Mass Fractions

Ore Density 1 = 2.62 g/cm3

Waste Rock Density = 2.08 g/cm3Tailings Dry Density = 2.30 g/cm3Conc't Density 1 = 1.9 g/cm3

Native Soils Density = 1.3 g/cm3

Low Cut (µm) High Cut (µm) Mean Size (µm)0 1 0.631 2 1.552 2.5 2.26

2.5 3 2.763 4 3.524 5 4.525 6 5.526 10 8.16

10 15 12.66

Point Sources 3

SV01 Crushing Plant Ore Material Density = 2.62 g/cm3

SV02 Crushing Plant Controlled with Baghouse

Particle Size Range (µm) Cum Size (%) Cum Wt. (g/cm3) Mass (g/cm3)Uncontrolled Mass Fraction Control (%)

Controlled Mass (g/cm3)

Controlled Mass Fraction

1 4 0.10 0.10 0.04 99 0.0010 0.072 2.62 0.6302 11 0.29 0.18 0.07 99 0.0018 0.126 2.62 1.554

2.5 15 0.39 0.10 0.04 99.5 0.0005 0.036 2.62 2.2593 18 0.47 0.08 0.03 99.5 0.0004 0.027 2.62 2.7584 25 0.65 0.18 0.07 99.5 0.0009 0.063 2.62 3.5245 30 0.79 0.13 0.05 99.5 0.0007 0.045 2.62 4.5186 34 0.89 0.10 0.04 99.5 0.0005 0.036 2.62 5.51510 51 1.34 0.45 0.17 99.5 0.0022 0.153 2.62 8.16315 100 2.62 1.28 0.49 99.5 0.0064 0.441 2.62 12.664

Totals 2.62 1.0 0.015 1.0

Mean Particle Size Range Calculations 2





Particle SizeClient: Aquila Resources, Inc. Project ID.: 17A021

Project:Prepared by: CED1 Date: 02/26/19Checked by: AKM Date: 03/19/19


Volume Sources 3

UNLOAD Ore Material Density = 2.62 g/cm3

FELOAD No Control Devices Added to Mechanically Change Particle SizeCB 1 to 3TRTOWERDROP1, TRANS1, FLOTCHTEDROP2, TRANS2, OXCHUTEFELHOP

Particle Size Range (µm) Cum Size (%) Cum Wt. (g/cm3) Mass (g/cm3) Mass Fraction1 4 0.10 0.10 0.04 2.62 0.6302 11 0.29 0.18 0.07 2.62 1.554

2.5 15 0.39 0.10 0.04 2.62 2.2593 18 0.47 0.08 0.03 2.62 2.7584 25 0.65 0.18 0.07 2.62 3.5245 30 0.79 0.13 0.05 2.62 4.5186 34 0.89 0.10 0.04 2.62 5.51510 51 1.34 0.45 0.17 2.62 8.16315 100 2.62 1.28 0.49 2.62 12.664

Totals 2.62 1.0

HRROM Native Soils Density = 1.33 g/cm3

HRFTMFWRF No Control Devices Added to Mechanically Change Particle Size

Particle Size Range (µm) Cum Size (%) Cum Wt. (g/cm3) Mass (g/cm3) Mass Fraction1 4 0.05 0.05 0.042 11 0.15 0.09 0.07

2.5 15 0.20 0.05 0.043 18 0.24 0.04 0.034 25 0.33 0.09 0.075 30 0.40 0.07 0.056 34 0.45 0.05 0.0410 51 0.68 0.23 0.1715 100 1.33 0.65 0.49

Totals 1.33 1.0





Area Sources 3

Open Pit Waste Rock Density = 2.08 g/cm3

WR Travel and Place No Control Devices Added to Mechanically Change Particle Size

Particle Size Range (µm) Cum Size (%) Cum Wt. (g/cm3) Mass (g/cm3) Mass Fraction1 4 0.08 0.08 0.04 2.08 0.6302 11 0.23 0.15 0.07 2.08 1.554

2.5 15 0.31 0.08 0.04 2.08 2.2593 18 0.37 0.06 0.03 2.08 2.7584 25 0.52 0.15 0.07 2.08 3.5245 30 0.62 0.10 0.05 2.08 4.5186 34 0.71 0.08 0.04 2.08 5.51510 51 1.06 0.35 0.17 2.08 8.16315 100 2.08 1.02 0.49 2.08 12.664

Totals 2.08 1.0

TMF and WRF Wind Erosion Tailings Density = 2.3 g/cm3

No Control Devices Added to Mechanically Change Particle Size


2.5 15 0.35 0.09 0.043 18 0.41 0.07 0.034 25 0.58 0.16 0.075 30 0.69 0.12 0.056 34 0.78 0.09 0.0410 51 1.17 0.39 0.1715 100 2.30 1.13 0.49

Totals 2.30 1.0





Concentrate Load-Out Bldg Concentrate Material Density = 1.9 g/cm3

No Control Devices Added to Mechanically Change Particle Size


2.5 15 0.2850 0.0760 0.043 18 0.3420 0.0570 0.034 25 0.4750 0.1330 0.075 30 0.5700 0.0950 0.056 34 0.6460 0.0760 0.0410 51 0.9690 0.3230 0.1715 100 1.9000 0.9310 0.49

Totals 1.90 1.0

Notes:

1. Material densities were taken directly from the Data Table completed for air emission calculations for the Aquila Resources, Inc. site.

2. The methodology for determining the mean particle size range is taken from the Human Health Risk Assessment Protocol for Hazardous Waste Combustion Facilities , Chapter 3, Air Dispersion and Deposition Modeling.

3. Certain assumptions were made regarding particle size and density for input files to the air deposition model. Particle diameters were taken from Appendix B.2, Table B.2.2 to AP-42, Generalized Particle Size Distributions. Table B.2.2 is for use with aggregate and unprocessed ores that are mechanically generated. This broad category includes emissions from milling, grinding and crushing of these types of materials.


Mine Pit Backfill using Waste Rock - Material Handling, Placement, and Haul Road Traffic

Emissions will be comprised from the following activities:1. Material transfer and removal of waste rock at the North and South Waste Rock facilities.2. Vehicle travel on waste rock3. Haul truck movement of waste rock along surface haul roads.4. Haul truck movement and placement of waste rock in the mine pit.

1. Material Transfer and removal of Waste Rock at North Waste Rock Facility (NWRF) and South Waste Rock Facility (SWRF). Two activities are estimated here: removal of waste rock and loading of material to the haul truck. Both operations are estimated using AP-42 Ch. 13.2.4. The two activities are combined in the estimate in this section.

Calc 1AP-42 13.2.4 Eq. (1)

E= emission factor

k=particle size multiplier (dimensionless)= 0.74 PM *Assumes k factor for PM is represented by PM-30k=particle size multiplier (dimensionless)= 0.35 PM-10k=particle size multiplier (dimensionless)= 0.053 PM-2.5

U= mean wind speed (mph)= 6.1 mph (average wind speed over 8 quarters of data from ERM M= material moisture content (%)= 5 Waste rock moisture content

Years of backfill activity= 3 yearsDays per year= 365 dayhours per day= 24 hrs

Total Volume Waste Rock Needed to Backfill Pit 2 19,060,000 m3

Total tonnes Waste Rock Needed to Backfill Pit 39,644,800 tonnes43,700,859 tons

Total Waste Rock Transfer per Year 2 14,566,953 ton/yearWaste Rock Transferred from NWRF 3 = 9,861,827 ton/year Waste Rock Transferred from SWRF 3 = 4,705,126 ton/year

NWRF: SWRF:


Emission factor 0.0009 0.0004 0.00006 lb/ton Emission Factor 0.0009 0.0004 0.00006 lb/ton0.957 0.453 0.069 lb/hr 0.457 0.216 0.033 lb/hour

4.2 2.0 0.3 ton/yr3 2.0 0.9 0.14 ton/yearNotes:

At the end of mine operations, waste rock stored at the North and South Waste Rock Storage Facilities will be removed and transferred to the mine pit for backfilling as part of reclamation. Waste rock that was used for construction of the Tailings Management Facility berm will remain in place, so it will be unaffected by this reclamation step. This activity will not occur during mine operations, so it will not add to facility-wide calculated emissions for operations and air permitting.

1. Particle size multipliers estimated from data collected for tailings material. Data are in Particle Distribution Table for tailings in Golder Associates report Trade-Off Evaluation - Tailings and Waste Rock Management Alternatives , August 2010.

2. This represents the total amount of waste rock that will be used to backfill the mine pit. This information comes from Golder Associates (2018) , Back Forty Project - Feasibility Design of Tailings and Waste Rock Management Facilities , March 12, 2018. During reclamation, waste rock will be removed from the NWRSF and SWRF and transferred to the mine pit. Based on the mine reclamation schedule, this activity will occur over a three-year period.

3. Based on information from Golder Associates (2018) report cited in Note 2, approximately 67.7% of the waste rock will come from the NWRF and 32.3% will come from the SWRF.




E = k (0.0032) (U/5) 1.3 / (M/2) 1.4





2. Vehicle Travel on Waste Rock

AP-42 Chapter 13.2.2 Unaved Roads 11/06 lb/VMT Equation (1a)





a 0.7 0.9 0.9b 0.45 0.45 0.45


s= surface material silt content (%)s= 1 % silt content for waste rock materials (Assumes relatively large pieces of material)

W Waste rock haul truck= 231.60 ton Round-trip weight calculated from average of tare and rated loaded weight


VMT= vehicle miles traveled per year, calculated separately for each vehicle fleetPrecipitation factor= 0.59 Based on equation (2) and P=135


NWRF: SWRF:VMT waste rock truck = 2000 feet VMT waste rock truck = 2000 feet

2 round trip factor 2 round trip factor4000 feet round trip 4000 feet round trip5280 feet per mile Days per year= 365 day 5280 feet per mile Days per year= 365 day0.76 miles per trip hours per day= 24 hrs 0.76 miles per trip hours per day= 24 hrs

8760 hr/yr maximum 8760 hr/yr maximum9,861,827 ton/yr waste rock to transport 8030 hr/yr normal/actual 4,705,126 ton/yr waste rock to transport 8030 hr/yr normal/actual

100.3 ton/truck 100.3 ton/truck98,314 truck trips /year 46,906 truck trips /year

VMT waste rock truck = 74,480 VMT/yr VMT waste rock truck = 35,535 VMT/yr 8.50 VMT/hr 4.06 VMT/hr


Emissions Emissions Emissions Emissions EmissionsEmissionsPM PM-10 PM-2.5 PM PM-10 PM-2.5

Unpaved Road Emission Factor EF 3.58 0.67 0.07 lb/VMT Unpaved Road Emission Factor EF 3.58 0.67 0.07 lb/VMTEmissions 1.5 0.284 0.028 lb/hr Emissions 0.73 0.135 0.014 lb/hrEmissions 6.7 1.2 0.12 ton/yr Emissions 3.2 0.593 0.059 ton/yr

Emissions Emissions Emissions Emissions EmissionsEmissionsPM PM-10 PM-2.5 PM PM-10 PM-2.5

2.48 0.74 0.10 1.18 0.35 0.05 lb/hr10.87 3.23 0.42 5.18 1.54 0.20 ton/yr

From Year 4 waste rock production and Figure 3-2, From Year 4 waste rock production and Figure

NWRF Waste Rock Removal & Travel SWRF Waste Rock Removal & Travel Maximum Travel Maximum

E k s Wa b

=

×

12 3

Eext = E [(365 - P) / 365]





3. Haul Truck Movement Along Surface On-Site Roads







a 0.7 0.9 0.9b 0.45 0.45 0.45


s= surface material silt content (%)s= 2 % silt content of aggregate mat'l used for site roads (Assumes regular road

maintenance such as grading & replacing with fresh mat'l.)

W= "fleet" average weight of vehicle (tons) - varies for each vehicle "fleet"W Waste rock haul truck= 231.60 ton Round-trip weight calculated from average of tare and rated loaded weight

Payload Wt. WR Haul Truck = 100.31 tons



Precipitation factor= 0.59 Based on equation (2) and P=150


a. Waste Rock Truck transporting waste rock from North Waste Rock Facility

VMT waste rock truck = 12,000 ft (round trip distance on unpaved road between pit and North Waste Rock Facility - approximate middle)5,280 feet/mile

14,566,953 ton/yr total waste rock to remove 9,861,827 ton/yr estimated waste rock from North Waste Rock Facility



Unpaved vehicle miles traveled, VMT 223,441 VMT/yr 25.51 VMT/hr



Unpaved Road Emission Factor EF 5.82 1.25 0.12 lb/VMTEmissions 7.42 1.59 0.16 lb/hrEmissions 65,042 13,914 1,391 lb/yrEmissions 32.5 7.0 0.7 ton/yr

𝐸𝐸 = 𝑘𝑘 𝑠𝑠/12 𝑎𝑎 × 𝑊𝑊/3 𝑏𝑏






b. Waste Rock Truck transporting waste rock from South Waste Rock Facility

VMT waste rock truck = 5,000 ft (round trip distance on unpaved road between pit and South Waste Rock Facility - approximate middle)5,280 feet/mile

14,566,953 ton/yr total waste rock to remove 4,705,126 ton/yr estimated waste rock from South Waste Rock Facility



Unpaved vehicle miles traveled, VMT 44,419 VMT/yr 5.07 VMT/hr



Unpaved Road Emission Factor EF 5.82 1.25 0.12 lb/VMTEmissions 1.48 0.32 0.03 lb/hrEmissions 12,930 2,766 277 lb/yrEmissions 6.5 1.4 0.1 ton/yr

4. Haul Truck Movement and Placement of Waste Rock in the Mine Pit.

a. Material Handling

Estimating material transfer emissions using - AP-42 13.2.4 Eq. (1) Transfer to location in mine pit

E= emission factor:

k=particle size multiplier (dimensionless)U= mean wind speed (mph) 3.0 Reduced average wind speed (from 6.1 mph aboveground) in the pit due to the natural sheltering provided by the geometry.M= material moisture content (%) waste rock M= 5% See Data Sheet

1 year: 365 day/year, 24 hr/day = 8760 hr/yr8030 hr/yr (Normal/Actual)

Waste Rock Waste Rock throughput: 1663 ton/hr

E E E k k k U M Emissions Emissions EmissionsPM PM-10 PM-2.5 PM * PM-10 PM-2.5 PM PM-10 PM-2.5

lb/ton lb/ton lb/ton unitless unitless unitless miles/hr % lb/hr lb/hr lb/hr0.0003 0.0002 0.00002 0.74 0.35 0.053 3.00 5 0.56 0.27 0.04

Total Emission Rate from Waste Rock Handling: 0.56 0.27 0.04 lb/hr* Assume PM is represented by k factor for PM-30. 2.46 1.16 0.18 ton/year

E k U M lb ton=

( . ) / ( / ). .

0 00325 2

1 3 1 4





b. Vehicle Travel







a 0.7 0.9 0.9b 0.45 0.45 0.45

*Assumes PM is represented by PM-30s= surface material silt content (%)

s= 1

W= "fleet" average weight of vehicle (tons) CAT 777G truck W = 210.10 tonne (see data sheet)

231.6 ton Used for waste rock. Round-trip weight calculated from average of tare and rated loaded weight



Precipitation factor= 0.59 Based on equation (2) and P=135Control from

CE = 90% from roadway watering programCE = 50% from limiting truck speed to 15 mph

E factor E factor E factorPM PM-10 PM-2.5

controlled emission factor lb/VMT lb/VMT lb/VMTE haul truck traffic= 0.18 0.03 0.003 lb/VMT =E x Factor precip x CE road watering x CE limiting speed

Vehicle Mile Travelled:Based on material moved and the CAT 777G haul truck capacity:

Waste rock transport 14,566,953 ton waste rock transport from Waste Rock Storage100.3 ton/truck Payload

145,219 truck trip/year trucks waste rockRound trip

145,219 total truck trips per year round trip into pit to edge of pit m iles (see Note 2)VMT per round trip 1.77 total road length to pit bottom (See Note 1): 2842 3.53

VMT 256,448 miles travelled per year average round trip: 1421 1.77 distance from pit floor at elevation to top of pit: 120 0.15

VMT per trip: 1.77Emissions: Emissions Emissions Emissions

Vehicle Travel PM PM-10 PM-2.5Emissions= 5.2 1.0 0.1 lb/hr based on a 24 hour day 8760 hr/yr maximum

45952 8558 856 lb/yr 8030 hr/yr normal/actual23.0 4.3 0.4 ton/yr

Notes:

2. The conversion factor for meters to miles = 2842 meters * 0.000621371 = 1.76 miles * 2 = 3.53 miles. Conversion is also 2842 meters / 1609.344498 = 1.76 miles * 2 = 3.53 miles.

Total Emissions - Mine Pit Backfilling Activities


18.37 4.23 0.47 lb/hr160,946 77,085 4,131 lb/yr

80.5 38.5 2.1 ton/yr

1. Mine pit road length calculated using CAD tools. The maximum distance of 2842 meters was estimated by tracking the centerline of the mine pit haul road from the surface to the bottom of the pit. Information provided by J. Whitstone on 8/25/15 to A. Martin.

Assume coarse material in pit area

% silt content of aggregate mat'l used for site roads (Assumes regular road maintenance such as grading & replacing with fresh mat'l.)

E k s Wa b

=

×

12 3






Prepared by: Date:Checked by: Date:










Prepared by: AKM/CED1 Date:Checked by: Date:






