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SUBMITONEHARDCOPYANDONEELECTRONICCOPY For A enc Use On]WYOMINGPOLLUTANTDISCHARGEELHVIINATION SYSTEM

APPLICATIONFORPERMITT0 DISCHARGEFROM Applwa‘m"Number

SHVAGETREATMENTFACHJTHB “mp0Date Received:

Ar‘ Y I» ’1 ’7 _

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PLEASE PRINT 0R TYPE J1L?”—\mn/day/yr) NQD

Revised February 2015

FOR ANY QUESTION, PLEASE ATTACH ADDITIONAL SHEETS, COPIES OR INFORMATION AS NEEDED(BE SURE TO INCLUDE THE LETTER AND ITEM 44 ON THE ATTACHMENT)

A. TYPE OF PERMITBEING APPLIED FOR (check one):.,

E] NewIE] Renewal IUN 2 3 ZUIGD Major modification

FOR PERMITRENEWAL 0R MAJOR MODIFICATION: DEGWaterman”WY0021024

. . 30 November 2016ExpirationDate:

Permit number

For permit modifications, please attach a letter explainingmodifications requested.

B. DESCRIPTION OF THE TREATMENT SYSTEM: (egi, “Includes a mechanical bar screen with a manual bypass barscreen and a girt chamber”, “flows through an ultraviolet (UV) disinfectionunit”, etc). You may include descriptiononseparate sheet.

Also, please provide a site sketch showing the processes of the treatment plant, including all bypass piping and all backuppower sources or redundancy in the system. This includes a water balance showing all treatment units, including disinfection,and showing daily average flow rates at infl uent and dischargepoints, and approximatedaily flow rates between treatmentunits

C. IDENTIFICATION OF THE TYPE OF COLLECTION SYSTEM USED BY THE TREATMENT WORKS:(check one): A separate sanitary system [El OR A combined storm and sanitary system I]Estimate of the percent of sewer line that each type comprises: 100

How many bypass outfalls does this facility contain?1

How many constructed emergencyoverflow outfalls does this facility contain?1

Ifyou‘ve checked the combined storm and sanitary system box, then additional informationwill be requested.

WYPDES Application for Sewage Treatment Facilities

CompanyContact NameHarvey Saxbury

ConsultantContactName

CompanyNameCity of Buffalo

CompanyName

Mailing Address

46 North MainMailing Address

City, State, and Zip Code

Bufimo,VVY82834City, State, and Zip Code

Telephone Number

(307) 684— 8205TelephoneNumber

E-Mail [email protected]

E-MailAddress

Preference for contact: Preferencefor con tact:phoneStatus of applicant: El Federal E State I] Private [:1 Public El Other

Status ofapplicant: El Owner [E] Operator DBoth

Name ofthe faci ity (this lSiIhe acr ityname that

BuffaloWasteWater Treatment Plantwrll appear on the WYPDESpermit)

Address

151 Stockyard RoadCounty

JohnsonCity, State, and Zip CodeBuffalo, WY 82834Telephone Number FacsimileNumber(307) 684- 8205 (307) 684- 8206Quarter/Quarter Section Township RangeNE 36 T51 N R81WLatitude (decimal degrees to 5 decimal places ) Longitude (decimal degrees to 5 decimal places )

44.35177 -106.66488Clear Creek (class 2AB) (outfall 003) or to S

ReceivingWater Description (in the event of facility discharge, wherewould the dischargego?)

plasher Ditch (class 4A) (outfall 005), Powder River Basin


46 North Main Street

F. POPULATidNOF MUNICIPAL ENTm‘EssEKvan BYTHISmam? (mending unmmrporfiwd connector '

Name ofMunicipal Entity #1 Name ofMunicipalEntity #2

City of BuffaloPopulation Population

4,615 (2014 census)Mailing Address MailingAddress

City, State, and Zip Code

Buffalo, WY 82834City, State, and Zip Code

Is collection system (check one):A separate sanitary system E] orA combined storm and sanitary system B?

Is collection system (check one):A separate sanitary system orA combined storm and sanitary system C]?

ls collection system (check one):Owned Ii] or maintained E] by the municipal entity?

Is collection system (check one):Owned El or maintained [I by the municipal entity?

(Additional pagesmay be added as necessary)

FLOW RATE: for the past three years provide (in MGD):

The facility’s design flow rate (the wastewaterflow rate that the plant was built to handle):1 '8 MGD

The facility’s annual average daily flow rate: 0-81 MGD

1.52 MGDThe facility‘s maximum daily flow rate:

H. PRETREATMENT PROGRAM:

Does the treatment works have, or is it subject to, an approved pretreatmentprogram?Yes -_No

Provide the number of Significant IndustrialUsers (SIUs) and Categorical Industrial Users (CIUs) that discharge to the treatmentworks.

Number of non—categorical Sl'Us. 0

Number ofCNS. 0

l. OUTFALL INFORMATION: Provide the following informationfor each outfall:

‘ r, .,_'r’mtfinfifflg‘fiun

, _

,

Discharge immune: e minim ' “magnum mine-I Seat-n mm Range Lithium MngicumaecimiPoint Receiving (newt

'-

«mummy non-net?’ ' ' degreesdeeeimi degreesdeecM/

Number stream _perenninl maintain! ‘-_ places) ‘ places)

a ' -, mean) ' miles)

,

__

_ , . ,-

001 C'earc'eekmt SENW 30 51 N 81W 44.362 , .. - -106.56 an002 easement”) NENE 36 51N 82W 44353-4. -1 06.66.003

(Additional pages may be added as necessary)


FOR ALL MINOR AND MAJOR FACILITIES WITH A DESIGN FLOWGREATER THAN 0R EQUAL T0 0.1 MGD

Please Complete the Following

J. FLOW: What is the current average daily volume of inflow and infiltration in gallons per day?

Inflow and infiltration is not measured _

What steps are being taken to minimizeinflow and infiltration?‘ . .

No steps currently being taken to minimize Inflow and infiltration

K. SCHEDULED IMPROVEMENTS AT THE PLANT

For each outfall, provide a list of improvementsto the plant that have been scheduledfor the next five

years. For each improvement.provide the commencementand completiondate of construction. commencementdate

of discharge, and attainmentofoperational level.

Have appropriate pemrits/clearancesconcerningother Federal/State requirementsbeen obtained?DYesDNO

Describe briefly: No improvements scheduled

L. PLEASE PROVIDE A TOPOGRAPHIC MAP (or othermap ifa topographicmap IS unavailable)extendingone milebeyond the property boundaries of the treatment plant, depicting the facility and each of it’s:1. Intake and discharge structures2. Hazardous waste treatment storage or disposal facilities3. Wells where fluids from the facility are injectedunderground4 Wells, springs, drinkingwaterwells and any other surface water bodies that are listed in public records or

otherwise known to the applicant in the map area.Sewage sludge managementfacilities, including on-site treatment, storage, and disposal sites.

6. Location(s) at whichwaste classified as hazardous under RCRA enters the treatmentplant by truck, rail ordedicatedpipe.

_ur

M. PLEASE PROVIDE A DIAGRAM showing the processesof the treatment plant, including all bypass piping and all

backup power sources or redundancy in the system. Also, provide a narrative descriptionof the diagram.

N. PLEASE PROVIDE THE FOLLOWING INFORMATION FOR EACH OUTFALL, INCLUDINGBYPASS POINTS, THROUGH WHICH EFFLUENT IS DISCHARGED, AS APPLICABLE:

l. Outfall number2. Average daily flow rate, in million gallons per day3. Provide the followmg informationfor each outfall With a seasonal or periodic discharge:

a. Numberof times per year the dischargeoccursb. Duration of each dischargec. Flow of each discharged. Months in which dischargeoccurse. Is the outfall equippedwith a diffuser? If so, what type of diffuser is being used (e.g., high-rate)

O. DOES THE FACILITY RECEIVE WASTES ASSOCIATED WITH:1. The Resource Conservationand Recovery Act (RCRA)?

No2, The ComprehensiveEnvironmentalResponse,Compensation,and Liability Act (CERCLA)?

NO3. I'llie CorrectiveActionWastes (RCRA), or wastes generated at another type of cleanup or remediation site?

0If you’ve answered yes to any of the above questions (1-3), then additional informationwill be requested.


P. PLEASEPROVIDE THENAME,MAILING ADDRESSES AND TELEPHGNE NUMBERS of all landownerswhereoutfalls will belocated, ifprowrty owner is other than applicant

‘

LandowneTName iii Landowner Name #2Charles Holland LLC C/O Brenda Nimick

Mailing Address Mailing Address

42 Kumar RoadCity. State. and Zip Code City. State. and Zip Code

Buffalo,WY 82834Telephone Number TelephoneNumber

(Additional pages may be added as necessary)

Q. REPRESENTATIVE WATER QUALITY ANALYSIS FOR ALL APPLICANTS: all applicantsmust provide theresults of a water analyses for a sample collected from this facility or a location representativeof the quality ofwater beingproposed for discharge for the parameters listed below, in table 1. The analyses must be conducted in accordancewithapproved EPA test procedures (40 CFR Part 136). The samplemust be collectedwithin 90 days of submittal of the permitapplication. Include a signed copy of your lab report that includes the following:

Analytical methodResults of each of the chemical parametersat the units given belowDate of sample collectionDate of analysis for each parameterDetection limit for each parameter as achievedby the laboratory.

{PP-99‘?”

R. REPRESENTATIVE WATER QUALITY ANALYSIS FOR FACILITIES WITH A DESIGN CAPACITY OF1.0 MG!) AND FACILITIES THAT DO NOT HAVE AN APPROVED PRETREATMENT PROGRAM:applicants with facilities with a design capacity of 1.0 MGD AND do not have an approvedpretreatmentprogrammustalso provide the resultsofTHREE water analyses for samples collectedfrom this facility or a location representativeof thequality ofwater being proposed for discharge for the parameters listed be.ow, in table 2. Applicantsmust provide data for aminimumof three samples taken within four and one-halfyears prior to the date of the permit application. The analyses mustbe conducted in accordancewith approvedEPA test procedures (40 CFRPart 136). Include a signed copy ofyour lab reportthat includes the following:

AnalyticalmethodResults of each of the chemical parametersat the units given belowDate of sample collectionDate of analysis for each parameterDetection limit for each parameter as achievedby the laboratory.

9.0-9.7.”

Parameter _ .

' i_

,

'

orBiolo 'cal Demand D or CBOD 5.0E. coli colonies 100 mls. l colon formin unit 100 mls.Ph StandardUnits s.u. 0.01 Hunits s.u.T rature Celsius 0.1Total S ed Solids 10.0Hardness CaCO3 10


Metals (total recoverable),cyanide and total phenols 2-chloroethylvinyl ether 4,6—dinitro-o»cresol Chrysene N-nitrosodiphenylamine

AntimonyRequired Detection limit (1g/l) chloroform 2,4—dinitrophenol Di—n»butyl phthalate PhenanthreneArsenicRequired Detection limit (1

Jig/l) Dichlorobromomethane 2-nitrophenol Di~n—octyl phtrialate Pyrene

BerylliumRequxred Detection limit001 ugll) 1,1~dichloroethane 4—nitrophenol Dibenzola,h)anthracene 1‘2,4,-tnchlorobenzeneCadmiumRequiredDetection limit (5ug/l) 1,2—dicnloroethane Pentaohlorophenol 1.2-dichlorobenzeneChromiumRequired Detection limit(10 pg/l) Trans—1,2—dichloroethylene Phenol 1,3-dichlorobenzeneCopperRequired Detection limit10 pg/li 1 1—dichloroethvlene 2 A G-trichlornnhenol 1 MichlorobenzeneLeadRequiredDetection limit (2HQ”) 1,2—dichloropropane Base-neutralcompounds 3,3—dichlorobenzidineMercuryRequiredDetection limit (1H9”) 1‘3-dichloropropylene Acenaphthene DiethylphthalateNickelRequrred Detection limit(10 lJQ/l) Ethylbenzene Acenaphthylene Dimethyl pnthalateSeleniumRequired Detection limit (5H9") Methyl bromide Anthraoene 2.4-dinitrotolueneSilverRequiredDetection limit (3Hall) Methyl chloride Benzidine 2,6-dinitrotolueneThalliurnRequired Detection limit(0.1 ug/I) Methylene chloride Benzo(a)anthracene 1,2—dipherlylhydrazineZincRequiredDetection limit(so pgll) 1,1 2.2-tetrachloroethane Benzo(a)pyrene Fluorantherie

Cyanide Tetrachloroethylene 3,4 benzofluoranthene Fluorene

Total phenolic compounds Toluene Benzo(ghi)perylene HexachlorobenzeneVolatile organiccompounds 1,1 , 1-trichloroethane Benzo(k)fluoranthene Hexachlorobutadiene

Bis (2-chloroethoxy) Hexachlorocyclo-Acrolein 1.1,2—tnchloroethane methane pentadiene

Acrylonitrile Trichloroethylene Bis (2-chloroethyl) ether HexachloroethaneBenzene Vinyl chloride Bis (2-chloroisopropyl) ether Indeno(1.2,3-od)pyrene

Bromoform Acid—extractablecompounds Bis (2-ethylhexyl) phthalate lsophorone

Carbon tetrachloride P-chloro-m~creso 4-bromophenyl phenyl ether NaphthaleneChlorobenzene 2-chloro phenol Butyl benzyl phthalate Nitrobenzene

Chlorodibron-iomethane 2,4—dichlorophenol 2»ch|oronaphthalene N-nitrosodi-n-propylamine

Chloroethane 2,4—dimethylphenol 4-chlorophenyl phenyl ether N-n itrosodimethylamine


S. AUTHORIZED SIGNATURE

Authorized signatories for this application are thefollowing:

For corporations: A principal executive oflicer ofat least the level ofvice president, or the manager ofone ormoremanufacturing,production, or operating/militia, provided the manager is authorized to makemanagementdecisionswhichgovcm the overall operation ofthefaeilitj/from which the discharge47773?W'J.

Forpartnerships: A general partner.

For a sole proprietorship: The proprietor.

For amunicipal, state. Either a principal executive oficer or ranking elected official.federal or otherpublicfacility:


I certify under penalty of law that this documentand all attachmentswere preparedundermy direction or supervision in accordancewith a system designed to assure that qualifiedpersonnel properly gather and evaluate the information submitted. Based on myinquiry of the person orpersons who manage the system, or those persons directly responsible/"orgathering the information, theinformation submitted is, to the best ofmy knowledge andbelief true, accurate. and complete. I am aware that there are significantpenalties/or submittingfalse information. including the possibility offine and imprisonmentfor knowing violations.

to, C/t/etL \fr/lws‘w/ Mxii/04Printed Name ofPerson Signing Title I

'1A/L/IOA'LK XKW; Q //0/?Signatlhe ofApplicant \/ Date567— MW free- 307' rl/V’ 571%

Telephone Fax

MAL/M t f gaff/Ma all/EMAIL CrowEmail

Section 35-1 1-901 of Wyoming Statutes provides that:

*All permit applicationsmust be signed in accordancewith 40 CFRPart 122.22, “for” or “by” signatures are not acceptable.

Section 35-11-901 onyoming Statutesprovides that:Any person who knowinglymakes any false statement, representation,or certification in any application shall upon conviction befined not more than $10,000or imprisoned for not more than one year, or both.

Mail this application to:

WYPDES Permits SectionDepartment ofEnvironmentalQuality/WQD122 West 25th Street, HerschlerBuilding, 4W, Cheyenne,WY 82002

Wyoming Statute 35-] 1—312 was revised to require dischargepermit fees be paid prior to permit issuance. Therefore,paymentofpermit fees must be accompaniedwith the application.Any applicationreceivedwithout proper fee paymentwill be retumed.

Individual permits are issued for a period of five years. A checkfor $500 per permitmust be includedwith all applications fornewpennitsand renewals for individualWYPDES permits.

I have enclosed a check for $

Check NumberForAgency Use Only

Date Check Received 2 "i ii:

‘ '43

CheckAmuunt égfiflz" ' $31 8‘0PermitTerm 1:2 (a? A_/

Approval WAG >3

WY'PDESApplication for SewageTreatmentFacilities

4/207?% Marilyn Siemens <[email protected]>

Buffalo Wastewater Treatment PlantWY00210241message

Marilyn Siemens <mari|[email protected]> Fri, Jun 24, 2016 at 2:32 PMTo: [email protected]: Roland Peterson <[email protected]>

We have received your renewal application for permit to discharge from the facility referenced above. Please note thatthe fee ($500) must be submitted with the application in order for us to begin processing the application (As of July 1,2013, the Department no longer issues invoices.)Make your check payable to:

WDEQ — Water Quality Division

Please send it to my attention as shown below. Upon receipt we can begin processing your permit application.Thank you!

Marilyn SiemensPermit Fees l Data [email protected] DEQ ~ Water Quality200 West 17th 51‘, 4th FloorCheyenne, WY 82002

li—Mail to and from me. In connection With the transactionol‘public business. is subject to the Wyoming Public RecordsAct and may be disclosed to third panics.

Inter-Mountain Labs

——IHrLanountAm nus 1673 Terra Avenue, Sheridan,Wyoming 82801

Your Environmental Monitoring Partnerph: (307) 672-8945

Sample Analysis ReportCLIENT: City of Bufialo Date Reported: 6/6/2016

46 N. Main Report ID: 81605453001Buffalo, WY 82834Work Order: 81605453

Collection Date: 5/25/2016 8:15:00 AMProject: WYPDES Sampling Date Received: 5/25/2016 9:30:00 AMLab ID: 81605453-001 Sampler:Client Sample ID: Effluent Grab Matrix: Water

COC: 165305Analyses Result RL Qual Units Date Analyzed/lnit Method

General ParametersHardness, Calcium/Magnesium (As CaCO3) 216 1 mg/L 06/01/2016 1453 BC SM 234GBCyanide. Total ND 0.01 mg/L 05/27/2016 1445 AME EPA 335.4Phenolios, Total Recoverable ND 0.05 mg/L 05/26/2016 1602 AME EPA 420 4cationsCalcium 55 1 mg/L 05/25/2016 1449 DG EPA 200.7Magnesium 19 1 mg/L 05/25/2016 1449 DG EPA 2007Total Recoverable MetalsAntimony ND 0.001 mg/L 05/26/2016 1627 MS EPA 2008Arsenic ND 0001 mg/L 05/26I2016 1627 MS EPA 200.8Barium ND 0.5 mg/L 05/26/2016 1627 MS EPA 200 8Beryllium ND 0001 mg/L 05/26/2016 1719 DO EPA 200.7Cadmium ND 0.002 mg/L 05/26/2016 1627 MS EPA 200 8Chromium ND 001 mg/L 05/26/20161719 DG EPA 200.7Copper ND 0.01 mg/L 05/26/2016 1627 MS EPA 2008Lead ND 0.002 mg/L 05/26/2016 1627 MS EPA 200.8Mercury ND 0001 mg/L 06/01/2016 1146 AW EPA 245.1Nickel ND 0.01 mg/L 05/26/2016 1719 DG EPA 200.7Selenium ND 0.005 mg/L 05/26/2016 1627 MS EPA 200.8Silver ND 0003 mg/L 05/26/2016 1627 MS EPA 200 8Thallium O 0014 0.0001 mg/L 05/26/2016 1627 MS EPA 2008Zinc 0.03 0.01 mg/L 05/26/2016 1719 DG EPA 200 7

These results apply only to the samples tested. RL - Reporting LimitQualifiers: B Analyte detected in the associated Method Blank C Calculated ValueE Value above quantitation range H Holding times for preparationor analysisexceededJ Analyte detected below quantitation limits L Analyzed by another laboratoryM Value exceeds Monthly Ave or MCL or is less than LCL ND Not Detected at the Reporting Limit0 Outsidethe Range of Dilutions S Spike Recovery outsideaccepted recovery limitsX Matrix Effect

Reviewed by: 8&1Page 1 of3Bill Courtney. Project Manager

lnter—Mountain Labsmi in nwuuum my: 1673 Terra Avenue, Sheridan.Wyoming 82801

Sample Analysis Report

Your Environmental Monitoring Partnerph: (307) 6728945

CLIENT: City of Buffalo Date Reported: 6/6/201646 N, Main Report ID: 81605453001Buffalo, WY 82834

Work Order: 81605453Collection Date: 5/25/2016 8:15:00 AM

Project: VWPDES Sampling Date Received: 5/25/2016 9:30:00 AMLab ID: 61605453-001 Sampler:Client Sample ID: Effluent Grab Matrix: Water


624 VolatileOrganic Compounds (Absaraka Lab)1,1,1»Trichloroethane ND 5 pg/L 05/26/2016 1424 SFK 6241‘1,2,2-Tetrachloroethane ND 5 pig/L 05/26/2016 1424 SFK 6241,1,2-Trichloroethane ND 5 pg/L 05/26/2016 1424 SFK 6241,1-Dichloroethane ND 5 ug/L 05/26/2016 1424 SFK 6241,1-Dichloroethene ND 5 pg/L 05/26/2016 1424 SFK 6241.2-Dichloroethane ND 5 ug/L 05/26/2016 1424 SFK 6241,2—chhloropropane ND 5 ug/L 05/26/2016 1424 SFK 6242-Chloroethyl vinyl ether ND 20 ug/L 05/26/2016 1424 SFK 624Acroleln ND 100 ug/L 05/26/2016 1424 SFK 624Acrylonltrile ND 200 ug/L 05/26/2016 1424 SFK 624Benzene ND 5 ug/L 05/26/2016 1424 SFK 624Bromodichloromelhane ND 5 pg/L 05/26/2016 1424 SFK 624Bromoform ND 5 ug/L 05/26/2016 1424 SFK 624Bromomethane ND 5 ug/L 05/26/2016 1424 SFK 624Carbon tetrachloride ND 5 ug/L 05/26/2016 1424 SFK 624Chlorobenzene ND 5 ug/L 05/26/2016 1424 SFK 624Chloroethane ND 5 ugIL 05/26/2016 1424 SFK 624chloroform ND 5 ug/L 05/26/2016 1424 SFK 624Chloromethane ND 5 pig/L 05/26/2016 1424 SFK 624crs-1,3-Dich|oropropene ND 5 ug/L 05/26/2016 1424 SFK 624Dibromochloromethane ND 5 ug/L 05/26/2016 1424 SFK 624Ethylbenzene ND 5 uglL 05/26/2016 1424 SFK 624Methylene chloride ND 20 pg/L 05/26/20161424 SFK 624Tetrachloroethene ND 5 ug/L 05/26/2016 1424 SFK 624Toluene ND 5 ug/L 05/26/2016 1424 SFK 624trans-1,2~Dichlor061hene ND 5 pg/L 05/26/2016 1424 SFK 624trans-1‘3Dichloropropene ND 5 ug/L 05/26/2016 1424 SFK 624Trichloroethene ND 5 pg/L 05/26/2016 1424 SFK 624Vinyl chloride ND 5 pg/L 05/26/2016 1424 SFK 624Surr: 4~Bromofluorobenzene 90 90—113 %REC 05I26/2016 1424 SFK 624Sun: 1,2—Dichloroethane-d4 109 56435 %REC 05/26/2016 1424 SFK 624Surr. Dibromofluoromethane 119 73-136 %REC 05/26/2016 1424 SFK 624Surr' Toluene-d8 98 89-112 %REC 05/26/2016 1424 SFK 624

These results apply only to the samples tested. RL - Reporting LimitQualifiers; B Analyte detected inthe associated Method Blank C Calculated ValueE Value above quantitation range H Holding times tor preparationor analysis exceededJ Analyte detected below quantitation limits L Analyzed by another laboratoryM Value exceeds Monthly Ave or MCL or is less than LCL ND Not Detected at the Reporting Limit0 Outside the Range of Dilutions S Spike Recovery outsideaccepted recovery limitsX Matrix Effect

Reviewed by: 84m’

M Page 2 or 3Bill Courtney, Project Manager

I:mulvnounlunuu

Inter-Mountain Labs1673 Terra Avenue, Sheridan.Wyoming 82801

Your Environmental Monitoring Partnerph: (307) 672-8945

CLIENT: City of Buffalo46 N. MainBuffalo, WY 82834

Sample Analysis Report

Date Reported: 6/6/2016

Collection Date:

Report ID: 81605453001

Work Order: 816054535/25/2016

Project: VWPDES Sampling Date Received: 5/25/2016 9:30:00 AMLab lD: 31605453-002 Sampler:Client Sample 10: Trip Blank Matrix: Water


624 Volatile Organic Compounds (Absaraka Lab)1,1,1-Trichloroethane ND 5 pg/L 05/26/2016 1549 SFK 6241,1,2,2—Tetrachloroethane ND 5 pg/L 05/26/2016 1549 SFK 6241,1,2-Trichloroethane ND 5 [lg/L 0506/2016 1549 SFK 6241,1-chhloroethane ND 5 rig/L 05/26/2016 1549 SFK 6241,1-Dichloroethene ND 5 ug/L 0526/2016 1549 SFK 6241,2—Dichloroethane ND 5 pg/L 05/26/2016 1549 SFK 6241,2—Dichloropropane ND 5 ug/L 05/26/2016 1549 SFK 6242-Chloroethyl vinyl ether ND 20 ug/L 05/26/2016 1549 SFK 624Acrolein ND 100 pg/L 05I26/2016 1549 SFK 624Acrylomtrile ND 200 ug/L 05/26/2016 1549 SFK 624Benzene ND 5 pg/L 05/26/2016 1549 SFK 624Bromodichloromethane ND 5 pglL 05/26/2016 1549 SFK 624Bromoform ND 5 pg/L 05/26I2016 1549 SFK 624Bromomethane ND 5 pg/L 05/26/2016 1549 SFK 624Carbon tetrachloride ND 5 uglL 05/26/2016 1549 SFK 624Chlorobenzene ND 5 uglL 0506/2016 1549 SFK 624Chloroethane ND 5 rig/L 05/26/2016 1549 SFK 624chloroform ND 5 uglL 05/26/2016 1549 SFK 624Chloromethane ND 5 ugL 05/26/2016 1549 SFK 624cis-1,3»Dichloropropene ND 5 pg/L 05/26/2016 1549 SFK 624Dibromochloromethane ND 5 ug/L 05/26/2016 1549 SFK 624Ethylbenzene ND 5 pg/L 05/26/2016 1549 SFK 624Methylene chloride ND 20 pg/L 05/26/2016 1549 SFK 624Tetrachloroethene ND 5 uglL 05/26/2016 1549 SFK 624Toluene ND 5 ug/L 05/26/2016 1549 SFK 624trans-1,2-Dichloroethene ND 5 ngL 05/26/2016 1549 SFK 624trans—1,3—Dichloropropene ND 5 ug/L 05/26/2016 1549 SFK 624Trichloroethene ND 5 pig/L 05/26/2016 1549 SFK 624Vinyl chloride ND 5 pg/L 0506/2016 1549 SFK 624Surr: 4-Bromofluorobenzene 90 90-113 %REC 05/26/2016 1549 SFK 624Surr: 1,2-Dichloroethane-d4 116 56—135 %REC 05/26/2016 1549 SFK 624Surr: Dibromofluoromethane 120 73-136 %REC 05/26/2016 1549 SFK 624Surr: Toluene-dB 98 89—112 %REC 05/26/2016 1549 SFK 624

These results apply only to the samples tested. RL - Reporting LimitQualifiers: El Analyte detected in the associated Method Blank 0 Calculated ValueE Value above quantitation range H Holding times tor preparationor analysis exceededJ Analyte detected below quantitation limits L Analyzed by another laboratoryM Value exceeds Monthly Ave or MCL or is less than LCL ND Not Detected at the Reporting Limit0 Outside the Range of Dilutions S Spike Recovery outsideaccepted recovery limitsX Matrix Efiect

Reviewed by: 8%)W Page 3 of 3Bill Courtney. Project Manager

SummitEnvironmental Technologies,Inc. 0SUMMIT Analytica'Revm...‘ m.” -. m, . w aggL ‘

._

. Cuyahaga Falls, Ohio 44223 (consolidated), - TEL: (330) 253-8211 FAX: (330) 253-4489 W0#: 16051705

Website: hllQ://www.xen2k.com Date Report 6/3/2016

CLIENT: Inter-MountainLaboratories, Inc. Collection Date: 5/25/2016 8: 15:00 AMProject: 81605453Lab 11): 1605170500] Matrix: NON-POTABLEWATERClient Sample ID 81605453—001

Analyses Result RL Qual Units DF Date Analyzed

SVOC BNA METHOD 625 E625 SW3510C Analyst: CxASEMI-VOLATILEORGANIC COMPOUNDS BY GCIMS (EPA 625)1,2,4-Trichlorobenzene ND 0.00101 mg/L 1 6/1/201611:11.00AM1,2»Dichlorobenzene ND 0.00101 mglL 1 6[1[2016 11:11.00 AM1,2-Diphenylhydrazine ND 0.00404 mg/L 1 6/1 [2016 111 1 :00 AM1,3—Dichlorobenzene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AM1,4vDichlorobenzene ND 0.00101 mg/L 1 6/1/2016 11 11:00 AM2,4,6—Trichlorophenol ND 0.00101 mg/L 1 6/1 [2016 11: 1 1 :00 AM2,4-chhlorophenol ND 000101 mg/L 1 6/1/2016 11'11’00 AM2,4-Dimethylphenol ND 0.00101 mg/L 1 6/1/2016 11:11:00 AM2,4—Dinitrophenol ND 0,00101 mg/L 1 6/1/201611'1100 AM2,4-Dinitrotoluene ND 0.00101 mglL 1 6/1/2016 11:11:00 AM2,6—Dinitrotoluene ND 0.00101 mg/L 1 6/1/201611:11:00AM2~Chloronaphthalene ND 0.00101 mg/L 1 6/1/201611:11.00AM2-Chlorophen0l ND 0.00101 mg/L 1 6/1/2016 11:11:00 AM2»Nitrophenol ND 0,00101 mg/L 1 6/1/201611.11.00 AM3.3'-Dichlorobenzidine ND 0,00101 QC- mg/L 1 6/1/2016 11:11:00 AM4-Bromophenyl phenyl ether ND 000101 mg/L 1 6/1/201611.11:00AM4—Chlorophenylphenyl ether ND 0.00101 mglL 1 6/1/201611211'00AM4ANitrophenol ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMAcenaphthene ND 0.00101 mg/L 1 6/1/2016 11 1 1 '00 AMAcenaphthylene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMAnthracene ND 0.00101 mg/L 1 6/1/201611.11:00AMBenzidine ND 0.00101 QC— mg/L 1 6/1/2016 11:11:00 AMBenzo(a)anthracene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMBenzo(a)pyrene ND 0,00101 mg/L 1 6/1/201611:11:00 AMBenzo(g,h,i)perylene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMBenzo(k)fluoranthene ND 0,00101 mg/L 1 6/1 [2016 11. 1 1 ‘00 AMBenzo(b)fluoranthene ND 0.00101 mglL 1 6/1/2016 11:11.00 AMBis(2—chloroethoxy)methane ND 0.00101 mg/L 1 6/1/2016 11:11'00AMBis(2—ch|oroethyl)ether ND 0,00101 mg/L 1 6/1/2016 11:11:00 AMBis(2—chloroisopropyl)ether ND 0.00101 mg/L 1 6/1/201611:11.00AMBis(2—ethy|hexyl) phthalate ND 0.00101 mg/L 1 6/1/2016 112 1:00 AMButyl benzyl phthalate ND 0.00101 mg/L 1 6/1/201611:11:00 AMChrysene ND 0.00101 mg/L 1 6/1/2016 1111.00 AMDi-n-butyl phthalate ND 0.00101 mg/L 1 6/1/2016 11:11:00 AM

Qualifiers: H Holdlngmm for pup-arena" or analysis «needed M Manual lnlcgrztlonused to dctzrmmcarea rmpnnscN'D Not Defined at the Reporting Lin-m.PL Pm“ Limn

RL Repumng Deteclwn Limitw SampleuonlamerKai-(pasture.s but of limit as speclfiedat zcsmude

OriginalPage 6 of 14

S 'tE vir Brim/Tech lo ' ,ln. .SUMMIT " AnalytwalRevort1».mt... _ -, 1.1. :r _.wt , ;,, »_ Glyn/«agoFalls, Ohio 44223 (consolidmcd), .. -

,. TEL: (330) 253-8211FAX; (330) 253-4489 W011: 16051705Websilz': th://www.senek.com Date Report 6/3/2016

CLIEN . Inter-MountainLaboratories, Inc. Collection Date: 5/25/2016 8:15:00 AMProject: 81605453Lab ID: 16051705-001 Matrix: NON-POTABLEWATERClient Sample ID 81605453-001

Analyses Result RL Qua] Units DF Date Analyzed

SVOC BNA METHOD 625 E625 SW351OC Analyst: CxASEMI-VOLATILEORGANIC COMPOUNDS BY GCIMS (EPA 625)Di-n-octyl phthalate ND 0.00101 mg/L 1 6/1/2016 11:11 00 AMDibenzo (a,h) anthracene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMDielhyl phthalate ND 0.00101 mg/L 1 6/1/201611211200 AMDlmethyl phthalate ND 0.00505 MB+ mg/L 1 6/1/2016 11: 1 1 :00 AMFluoranthene ND 0.00101 mg/L 1 6/1/201611.11:00AMFluorene ND 0.00101 mg/L 1 6/1/201611:11:00 AMHexachlorobenzene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMHexachlorobutadiene ND 0.00101 mg/L 1 6/1/201611'11100AMHexachlorocyclopentadiene ND 0.00101 mg/L 1 6/1/2016 11:1 :00 AMHexachloroethane ND 0.00101 mg/L 1 6/1/2016 11:1 .00 AM|ndeno(1,2.3.od)pyrene ND 0.00101 mg/L 1 6/1/201611I11 00 AMlsophorone ND 0.00101 mg/L 1 6/1/2016 11:11.00 AMN-Nttrosodrn-propylamine ND 0 00101 mg/L 1 6/1/2016 11:11:00 AMN-Nitrosodimethylamme ND 0.00101 mg/L 1 6/1/201611:11:00AMN»Nitrosodiphenylamine ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMNaphthalene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMNitrobenzene ND 0.00101 mg/L 1 6/1/201611:11:00 AMp~Chloro-m-creso| ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMPentachlorophenol ND 0.00101 mg/L 1 6/1/201611111200 AMPhenanthrene ND 0.00101 mg/L 1 6/1/201611:11:00AMPhenol ND 0.00101 mg/L 1 6/1/2016 1111.00 AMPyrene ND 0.00101 mg/L 1 6/1/2016 11:11:00 AMm&pCresol ND 0000404 mg/L 1 6/1/2016 11.11.00 AMDibenzofuran ND 0.00404 mg/L 1 6/1/201611:11'00AM

Qualifiers: H Holdmsmm for preparationor malyxls exceeded M Manual lntegrzuou used in determinema responseND N01 Detected at the ReportingLimn PL PermitLil-mtkl. ReponmDetccmm l,|mn w Samplecunlnma temperature is out orumu .s specifieda| ltstcude

Original

Page 7 of 14

B. Description of the treatment system:

The City of Buffalo WWTP is a 1.8 million gallon per day (MGD) single basin, extended aeration,activated sludge facility. The facility consists of a septage receiving station, influent lift station,headworks with screening and grit removal, three anaerobic selector chambers, two activated sludgebasins, two secondary clarifiers, and ultraviolet (UV) disinfection. Waste solids are digested aerobicallyin an aerated solids handling basin. Digested solids are transferred to a larger, aerated solids storagelagoon where they are stored prior to ultimate disposal.

See attached treatment plant processes diagram.

L. Pleaseprovide a topographicmap extendingone mile beyond the property boundariesof thetreatment plant:

See attached property boundaries diagram.

M. Pleaseprovide a diagram showing the processesof the treatment plant, including all bypass pipingand a]! backup power sourcesor redundancyin the system. Also provide a narrative description ofthe diagram.

See diagram provided in part B.

N. Pleaseprovide the following informationforeach outfall including bypass points throughwhicheffluentis dischargedas applicable:

1. Outfall number: 0032. Average daily flow rate (MGD): 0.81 MGD3. Provide the following information for each outfall with a seasonal or periodic discharge: Dischargefrom outfall 003 is constant.

1. Outfall number: 0052. Average daily flow rate (MGD): No discharge3. Provide the following information for each outfall with a seasonal or periodic discharge: No dischargeR. Representativewater qualityanalysis results:

Table 1Parameter / method Result Sample collection Sample analysis

date dateBOD/ SM 52108 1.80 mg/L 05/25/2016 05/25/2016E. coli/ Hach 10029 4.5 05/25/2016 05/25/2016

#/100mL

pH/ SM 4500»H* 7.21 slu. 05/25/2016 05/25/2016Temperature/ SM 2550 14 C 05/25/2016 05/25/2016TSS/ SM 2540 2.1 mg/L 05/25/2016 05/25/2016Hardness (CaC03)* *See 05/25/2016 06/01/2016

attachedresultssheetfrom IML

1.5

1.5.1

BuffaloWastewater Treatment PlantOperation and Maintenance Manual

September 2011

TREATMENT SYSTEM

Each major process at the Buffalo WWTP can be classified according to its overallfunction. This section provides general descriptions of each process with more detaileddiscussions provided in Section 3.0. Refer to Figure 1.5—1: Plant Site Layout for generallayout ofthe plant.

Headworks and Septage ReceivingThe Buffalo WWTP has two separate headworks facilities: the Main Headworks and theEmergency Overflow Headworks. The Main Headworks consists of a septage receivingstation, influent lift station, emergency overflow line, screening, and grit removal. it islocated to the south of the new aeration basins. The Emergency Overflow Headworks islocated just north of the new activated sludge plant and west of Primary Pond #2.The lnfluent Wet Well, which is a 8.5-feet by 29.5—feet by 23-feet cast-in-place concretestructure, has a working volume of approximately 20,000 gallons. lnfluent flows areconveyed from the City to the WWTP via a 30—inch, PVC gravity sewer line. The sewerline enters the influent lift station on the west end of the south wall. The lift station alsoreceives flows from the Septage Receiving Station and Decant Lift Station. In the eventof an emergency overflow, a 30—inch, PVC gravity line exits the lift station on the eastend of the south wall and conveys flow to the Emergency Overflow Headworks.The septage receiving station is a cast—in—place concrete structure that incorporates aquick—connect cam and groove hose connection and collection trough for off-loadingseptage from septic haulers. It is located immediately west of the Main HeadworksBuilding. Septage is conveyed through a 6-inch, gravity line to the 30—inch influentsewer line.

The Decant Lift Station is located southeast of the Emergency Overflow Headworks onthe edge of Primary Pond #2. The Decant Lift Station transfers decent/supernatant fromthe Aerobic Digester and Solids Storage Lagoon to the Main Headworks via a 6—inchforce main. The force main enters the Influent Wet Well through the east wall. inaddition to decant/supernatant, the Decant Lift Station receives sanitary flows and sumpand drain water from the Operations Building and laboratory through a 4-inch force main.it receives additional sanitary flows from the on-site residence through a 4-inch forcemain and from the Deer Park Lift Station. The Deer Park Lift Station serves the DeerCreek RV Park and Campground. All of these flows are transferred to the MainHeadworks through the Decant Lift Station.

Three non-clog submersible pumps in the influent Wet Well operate on a lead/lagpumping schedule to transfer influent from the wet well to the headworks process. Each

JACOBS" 6


September2011

pump has a capacity of 350 to 1,550 gallons per minute (gpm). Pump output iscontrolled with variable frequency drives (VFDs). Level sensors control pump on/offcycles. The influent pumps lift the raw wastewater approximately 20 feet to the influentchannel thereby allowing for gravity flow through the rest of the treatment process. All ofthe pumps incorporate individual control and check valves prior to their connection with acommon header in the lower level of the Main Headworks Building. A magnetic flowmeter in the lift station pump discharge line continuouslymonitors flow.

The Main Headworks Building contains one mechanical screen, one manual bar screen(located in a bypass channel), a vortex grit chamber, grit pumps, and a grit concentratorwith screw conveyor. The mechanical screen is a 1A-inch fine screen while the manualbar screen has one-inch openings Screened material is collected in a dumpster and isultimately landfilled.

Following screening, the influent wastewater is directed to a vortex grit chamber.Wastewater enters the circular chamber tangentially which creates a vortex or whirlpooleffect. Heavier material is forced to the outer walls of the grit chamber by centrifugalaction and is gradually drawn down to the bottom of the chamber. Lighter material andorganics simultaneously overflow out through the top of the grit chamber. Grit ispumped from the bottom of the grit chamber to the grit classifier using recessed impellerpumps. The classifier washes the grit to remove organic material which reducesattraction of insects and rodents and also prepares the grit for landfill disposal. A screwconveyor lifts the cleaned grit into a dumpster for ultimate landfill disposal. Excess waterand organic matter drain back into the influent channel.

The mechanical bar screen may be taken out of service by changing the arrangement ofslide gates to divert flow into the bypass channel to allow for maintenance and cleaning.A similar bypass channel exists for the vortex grit chamber. The bypass channels allowoperations staff to take equipment temporarily out of service for maintenance andcleaning.

Screening and grit removal processes extract coarse solids and inorganic particles thatmight otherwise damage equipment or interfere with operation of subsequent treatmentunits. Rags and fibrous material can accumulate on pump impellers and shafts causingvibration that may result in blockages and/or wear on pump impellers, shafts, casings,and seals. Solid debris may also accumulate in process tanks. Grit acts like liquidsandpaper and can abrade downstream equipment. Grit may also accumulate inprocess basins effectively reducing treatment capacity.

Subsequent to the headworks process, the wastewater flow continues to the AerationBasin Splitter Structure.

JACIJBSw 7


September 2011

1.5.2 Activated Sludge TreatmentThe secondary treatment process at the Buffalo WWTP is a single basin, extendedaeration activated sludge process. it consists of the Aeration Basin Splitter Structure,two selectors, two aeration basins, blowers and aeration system, the Clarifier SplitterStructure, two secondary clarifiers, return activated sludge (RAS) pumps, and wasteactivated sludge (WAS) pumps.

Screened and degritted wastewater from the Main Headworks Building flows by gravityto the activated sludge splitter box. The splitter box divides the influent wastewaterbetween two 1.7 MG aeration basins or can be arranged to send all of the influentwastewater to a single aeration basin. The splitter box is configured to accommodate athird aeration basin in the future.

From the splitter box, wastewater flows to two selectors. RAS is mixed with the influentwastewater at the selector entrance. Both selectors are constructed from 60-inch,HDPE pipe. On the east side, the selector is divided into two 50 foot long pipe segmentsand on the west side, the selector is a single 100 foot long segment.The selectors provide an anoxic zone where high BOD influent wastewater is broughtinto direct contact with RAS. The microorganisms present in the RAS are in a nearstarvation condition and will uptake BOD rapidly. The RAS itself may contain significantconcentrations of nitrate. Since the selectors are not aerated, the microorganismspresent in the RAS will utilize nitrate in order to consume BOD. This biological processis known as denitrification. The end product will be nitrogen gas. Because BODconcentrations will be highest in the selectors relative to the rest of the activated sludgeprocess, denitrification will be most rapid at this location.

The selectors are also intended to help inhibit the growth of certain filamentous bacteriathat can interfere with activated sludge settleability. Many filaments prefer low dissolvedoxygen (DO) conditions, but do not grow well in the complete absence of oxygen. At anaverage daily flow of 1.2 MGD, the selectors have about 35 minutes of hydraulicdetention time. Detention time will vary according to the influent and RAS flow rates.Upon leaving the selectors, the wastewater is conveyed to flash aeration chambers. Theflash aeration chambers are cast-in-place concrete structures that are located within theaeration basins. An overflow weir in each structure ensures that the selectors and flashaeration chambers remain full. The flash aeration chambers aerate and mix thewastewater and RAS before the mixture enters the aeration basin. They also strip thenitrogen gas bubbles produced in the selectors from the wastewater. Each chamberhouses BioLac fine bubble diffusers identical to the diffusers used in the aeration basins.

JACOBS” 9

Buffalo Wastewater Treatment PlantOperation and Maintenance Manual

September 2011Air is provided to the diffusers from the blowers and is controlled with a modulating flowcontrol valve and DO probe. Operations staff can set high and low concentration limitsfor the amount of DO desired within the flash aeration chambers. A modulating valvemaintains the DO set point.

Secondary treatment and nitrogen removal are accomplished within two, single basin,extended aeration activated sludge basins. The aeration basins are aerated and mixedwith BioLac fine bubble diffusers. Each aeration basin is equipped with ten aerationchains. Each chain has an automated modulating air flow valve. The air flow controlvalves for each basin are controlled by a sequencer. The operator may adjust thenumber of steps in the sequencer (0-6), the time duration of each step (0-99.93 hours),and which specific valves are open. in practice, the aeration basin may be operated withrolling anoxic zones to control nitrification and denitrification.

Air for the aeration system is provided through a series of four blowers; one 60-horsepower (hp), one 75-hp, and two 100-hp blowers. The blowers will operate invarious combinations based on operator programmed cycles.

Each aeration basin is equipped with two oxidation-reduction potential (ORP) probesand a single DO probe. These probes continuously monitor conditions within theaeration basins. Real-time data is transmitted through the Supervisory Control and DataAcquisition (SCADA) system to allow operations staff to adjust air flow and cycles. inthe event that a DO high level set point is reached, the sequencer will automaticallyclose some of the aeration valves.

in the activated sludge process, the biologically degradable organics (BOD5) in thesewage are metabolized by facultative microorganisms in the presence of oxygen. Thisprovides energy for the organisms to maintain life processes and to synthesize materialsfor cell reproduction. The nitrification process employs specific organisms to convertammonium nitrogen (NH4) to nitrite (NO?) and other organisms to convert nitrite tonitrate (N03—), These microorganisms are present in the wastewater. Denitrification willoccur in the anoxic zones where facultative microorganisms in the mixed liquor willconsume nitrate (N03-) to produce nitrogen gas (N2) as a by-product.The organisms that are produced in the aeration basins will, along with inert (non-biodegradable) solids, flocculate into a settleable mass. The fiocculated microorganismsand treated wastewater flow by gravity to the Clarifier Splitter Structure. The clarifiersplitter box serves two essential functions: balancing and dividing flows between theclarifiers and mixing the Mixed Liquor Suspended Solids (MLSS) from both aerationbasins. If the MLSS from both basins were not mixed together, the WWTP wouldfunction as two parallel activated sludge plants instead of a single cohesive treatmentsystem.

JAGOBS'" 1°


September 20111.5.3 Secondary Settling

The Buffalo WWTP has two, 50-foot diameter secondary clarifiers. The secondaryclarifiers separate the flocculated solids produced in the aeration basin from the treatedwastewater. Flocculated solids settle to the bottom of the clarifier and are removedwhile clarified wastewater overflows the clarifier weirs. A portion of the settled solids isreturned to the aeration basins to maintain a high concentration of biologically activecells. This is the RAS. Those biological solids in excess of that needed to maintain theactivated sludge inventory are wasted to the Aerobic Digester. This excess sludge isknown as WAS. The clarifiers have separate withdrawal lines for WAS, which ispumped from a center hopper, and the RAS which is removed directly from the clarifierfloor.

Key operating parameters for the secondary settling process include the surfaceoverflow rate (SOR) and solids loading rate (SLR). SOR is essentially a measure of flowvelocity. if the velocities are too high, particles will be carried up and out of the clarifierand on to the final effluent. The SOR and the SLR may be adjusted by increasing ordecreasing the RAS flow.

Flow enters the clarifiers through the center column pipes. A dispersion header islocated at the top of the center column to prevent short-circuiting and control scum.Each clarifier is equipped with a dual-arm sludge collection mechanism. One arm hasstandard scraper blades while the other arm has a rapid suction arm. The scraper armconsists of multiple angled plates that divert sludge that accumulates on the bottom ofthe clarifier to a hopper located at its center.Settled solids are removed from the hopper through a 6-inch diameter line which isconnected directly to the WAS pump header. The WAS process uses double diaphragmpumps to force the waste to sludge processing (see Section 1.5.5). There are threeWAS pumps: one dedicated to each clarlfier and a third one connecting to the scum box.The third WAS pump may also be used as a swing WAS pump should one of theprimary pumps need to be taken out of service. The WAS pumps discharge to acommon header. WAS flows are measured with a magnetic flow meter located betweenthe WAS pumps and the Aerobic Digester. Each WAS pump has a capacity of 80 gpm.Settled solids are removed directly from the bottom of the clarifier through the rapidsuction arm to an 8-inch line which terminates at the RAS pump suction header. TheRAS Process utilizes solids handling centrifugal pumps to force the sludge back to theActivated Sludge Treatment Process. There are five RAS pumps, two smaller pumpsand three larger pumps. All pumps are equipped with VFDs. One small pump, onelarge pump, and one magnetic flow meter are dedicated to each clarifier. The third largepump acts as a redundant pump for either clarifier. The smaller pumps have a capacity

JACOBS“ 11

1.5.4

1.5.5

1.5.6


September2011range of 100 to 400 gpm and the larger pumps have a capacity range of 400 to 800gpm.

Treated wastewater is discharged from each clarifier through a 24-inch line. Flows arecombined prior to disinfection in an effluent box. The effluent box is designed to poolwater prior to diverting flow to the UV channel. Pooling of the water is necessary toreduce turbulence and aide in creating laminar flow through the UV system.

DisinfectionPrior to discharge, the secondary effluent is disinfected through contact with 64 UVlamps arranged in two banks. Two banks ensure redundancy and allow individual banksto be taken off-line for maintenance. Subsequent to disinfection, the effluent flow ismeasured with a 12-inch Parshall flume equipped with an ultrasonic level sensor, anddischarged through the final effluent pipeline to Clear Creek.

Solids HandlingFrom the secondary settling process, WAS is discharged into the Aerobic Digester.Aerobic digestion stabilizes waste sludge by endogenous respiration. Themicroorganisms in the sludge deplete the available food sources and consume their ownprotoplasm to provide energy for cellular maintenance. Digestion substantially reducesthe total volume of solids for ultimate disposal. It also stabilizes the sludge and reducesits attractiveness to rodents, insects, and other vermin. Coarse bubble diffusers andcentrifugal blowers introduce air to the system to promote digestion and complete mixingwithin the basin. The digester is designed to provide 20 days of retention time at thedesign flow and load of 1.8 MGD and 2,552 pounds per day (ppd) of BOD.Following the Aerobic Digester, the digested solids flow to the Solids Storage Lagoon,where intermittent aeration also occurs. The amount of turbulence present in the SolidsStorage Lagoon is significantly less than that within the Aerobic Digester, whichpromotes settling of solids in the lagoon. These solids must be removed occasionally,dewatered, and disposed of. Effluent from the Solids Storage Lagoon is collected in theDecent Wet Well, along with sewage from force mains serving the Operations Building,on-site residence, and Deer Park Lift Station. The effluent and sewage is pumped to theinfluent Wet Well (see Section 1.5.1) using non-clog submersible pumps operating on alead/lag system.

EmergencyOverflowin the event of an extremely high flow event, the influentWet Well is equipped with a 30-inch, PVC gravity overflow line. This line penetrates the eastern end of the south wall ofthe wet well. The overflow is automatic once the water level in the wet Well reaches 8.5

JACOBS" 12

1.6

1.7


September 2011feet deep. Overflow wastewater is routed to the Emergency Overflow Headworks whereit is screened before passing on to Primary Pond #1.

The screening at the Emergency Overflow Headworks consists of a mechanicallycleaned bar screen. A manually cleaned bar screen is provided for back-up purposes.Primary Pond #1 was taken out of routine service when the activated sludge plant wasbrought on-Iine. It has a volume of 18 MG. The pond must remain empty and in workingcondition to provide backup storage for overflow events. Raw wastewater stored inPrimary Pond #1 must be pumped back to the Main Headworks for treatment usingportable submersible pumps.

There are two possible options to pump the stored overflow to the Main HeadworksBuilding. The first option is to use a portable pump with sufficient pipe length todischarge the overflow into the Influent Wet Well. Alternately, the second option is touse a portable pump with sufficient pipe length to discharge to the decent wet well.Attention must be given to the level in the decantwet well if it is used for this purpose toensure that the capacity of the pumps is not exceeded.

MONITORING AND RECORDKEEPINGMonitoring of the quality and quantity of wastewater is not only required per thedischarge permit, but is also important to operating the plant more efficiently. Monitoringis discussed in detail in the Process Control (Section 4.0) and Laboratory (Section 8.0)sections.

DISCHARGE PERMIT SUMMARY

Water pollution control in the United States is based primarily on the Federal WaterPollution Control Act of 1972, as amended in 1977 by the Clean Water Act and bysubsequent amendments. The objective of the Act is to "restore and maintain thechemical, physical, and biological integrity of the Nation's waters.“ To achieve thisobjective, the Act requires that water quality standards be established for the Nation'swaters and provide for the National Pollutant Discharge Elimination System (NPDES) toenforce these standards. In Wyoming, the WYDEQ administers the NPDES program, asdirected by the Water Quality Division (WQD). The state receives guidance andapproval from the United States Environmental Protection Agency (USEPA), which holdsfinal authority for the administration of the Act.

The plant discharge permit summarizes the quantity and quality of the effluent that theWWTP is legally allowed to discharge. This permit is issued by the WYDEQ, andcontains limits for both maximum daily flows and 30-day averages. In order to complywith this permit, the WWTP is required to take samples and monitor flows and reportthem to the WYDEQ.

JACOBS” 13


September2011feet deep. Overflow wastewater is routed to the Emergency Overflow Headworks whereit is screened before passing on to Primary Pond #1.

The screening at the Emergency Overflow Headworks consists of a mechanicallycleaned bar screen. A manually cleaned bar screen is provided for back—up purposes.Primary Pond #1 was taken out of routine service when the activated sludge plant wasbrought on-line. it has a volume of 18 MG. The pond must remain empty and in workingcondition to provide backup storage for overflow events. Raw wastewater stored inPrimary Pond #1 must be pumped back to the Main Headworks for treatment usingportable submersible pumps.

There are two possible options to pump the stored overflow to the Main HeadworksBuilding. The first option is to use a portable pump with sufficient pipe length todischarge the overflow into the Influent Wet Well. Alternately, the second option is touse a portable pump with sufficient pipe length to discharge to the decant wet well.Attention must be given to the level in the decantwet well if it is used for this purpose toensure that the capacity of the pumps is not exceeded.

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