NC0026441_Renewal Application_20181130

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ROY COOPER NORTH CAROLINA
Gotyrntor Environmental Quality
MICHAEL S.REGAN
Secretory
LINDA CULPEPPER
Interim Director
December 07, 2018
Bryan Thompson, Manager Town
Town of Siler City
PO Box 769
Siler City, NC 27344
Subject: Permit Renewal
Application No. NC0026441
Siler City WWTP
Chatham County
Dear Applicant:
The Water Quality Permitting Section acknowledges the November 30, 2018 receipt of your permit renewal application
and supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW
permitting branch. Per G.S. 150B-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit.The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
https://deq.nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely,
,. .‘.4-/ C--Lc:\
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
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North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-807-6300

McGffl
ASSOCIATES
RECENNovember 30, 2018 NOV 3 0 2018
`'Hater R
ep
Julie Grzyb, Supervisor Permiftin Section 9 Se
NPDES Complex Permitting
NCDEQ Division of Water Resources
9th Floor Archdale Building
512 North Salisbury Street
Raleigh,North Carolina 27604
RE: NPDES Permit Renewal Application
Permit Number NC0026441
Town of Siler City
Chatham County,North Carolina
Ms. Grzyb,
On behalf of the Town of Siler City find attached two (2) copies of the NPDES Permit
Renewal Application for the Siler City Wastewater Treatment Plant.
If you have any questions related to this application, please feel free to contact me at
910-295-3159.
Sincerely,
McGILL ASSOCIATES, P.A.
I3avid Honeycutt, P.E.
Project Manager
Cc: Bryan Thompson, Town of Siler City
Chris McCorquodale, Town of Siler City
1\projects\2018\siler city npdes permit application\fig 30nov18 doe
5 Regional Circle,Suite A ph 910.295.3159
Pinehurst,North Carolina 28374 f 910.295.3647 www mcgillengineers corn

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
FORM
2A NPDES FORM 2A APPLICATION OVERVIEW
NPDES
APPLICATION OVERVIEW
Form 2A has been developed in a modular format and consists of a "Basic Application Information" packet and
a "Supplemental Application Information" packet. The Basic Application Information packet is divided into two
parts. All applicants must complete Parts A and C. Applicants with a design flow greater than or equal to 0.1
mgd must also complete Part B. Some applicants must also complete the Supplemental Application
Information packet. The following items explain which parts of Form 2A you must complete.
BASIC APPLICATION INFORMATION:
A. Basic Application Information for all Applicants. All applicants must complete questions A.1 through A.8. A treatment
works that discharges effluent to surface waters of the United States must also answer questions A.9 through A.12.
B. Additional Application Information for Applicants with a Design Flow>0.1 mgd. All treatment works that have design
flows greater than or equal to 0.1 million gallons per day must complete questions B.1 through B.6.
C. Certification. All applicants must complete Part C (Certification).
SUPPLEMENTAL APPLICATION INFORMATION:
D. Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and
meets one or more of the following criteria must complete Part D (Expanded Effluent Testing Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to provide the information.
E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E(Toxicity
Testing Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to submit results of toxicity testing.
F. Industrial User Discharges and RCRA/CERCLA Wastes. A treatment works that accepts process wastewater from any
significant industrial users(SlUs)or receives RCRA or CERCLA wastes must complete Part F(Industrial User Discharges and
RCRA/CERCLA Wastes). Sills are defined as:
1. All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations(CFR)403.6 and
40 CFR Chapter I, Subchapter N (see instructions); and
2. Any other industrial user that:
a. Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works(with certain
exclusions); or
b. Contributes a process wastestream that makes up 5 percent or more of the average dry weather hydraulic or organic
capacity of the treatment plant; or
c. Is designated as an SIU by the control authority.
G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G (Combined Sewer
Systems).
ALL APPLICANTS MUST COMPLETE PART C (CERTIFICATION)
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 1 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
c If the answer to B.5.b is"Yes,"briefly describe,including new maximum daily inflow rate(if applicable).
d. Provide dates imposed by any compliance schedule or any actual dates of completion for the implementation steps listed below,as
applicable. For improvements planned independently of local,State,or Federal agencies,indicate planned or actual completion dates,as
applicable. Indicate dates as accurately as possible.
Schedule Actual Completion
Implementation Stage MM/DD/YYYY MM/DD/YYYY
-Begin construction / / / /
-End construction / / / /
-Begin discharge _/ / / /
-Attain operational level /-/ / /
e. Have appropriate permits/clearances concerning other Federal/State requirements been obtained? Yes No
Describe briefly:
B.6.EFFLUENT TESTING DATA(GREATER THAN 0.1 MGD ONLY).
Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the indicated effluent
testing required by the permitting authority for each outfall through which effluent is discharged. Do not include information on combined sewer
overflows in this section. All information reported must be based on data collected through analysis conducted using 40 CFR Part 136
methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC requirements for
standard methods for analytes not addressed by 40 CFR Part 136. At a minimum,effluent testing data must be based on at least three
pollutant scans and must be no more than four and one-half years old.
Outfall Number:001
POLLUTANT MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE
Conc. Units Conc. Units Number of ANALYTICAL ML/MDL
Samples METHOD
CONVENTIONAL AND NONCONVENTIONAL COMPOUNDS.
AMMONIA(as N) 6.50 mg/I 0.10 mg/I 743.00 SM4500 NH3 D 0.5
CHLORINE(TOTAL
RESIDUAL,TRC) 5.00 ug/I 0.00 ug/I 746.00 SM4500 CL G 10
DISSOLVED OXYGEN 13.20 mg/I 8.90 mg/I 744.00 SM4500 O G 1.0
TOTALHL
NITROGEN EN(TK
(TKN) 4.50 mg/I 0.50 mg/I 146.00 Hach 10242 0.5
NITRATE PLUS NITRITE
NITROGEN 28.50 mg/I 13.40 mg/I 150.00 Hach 10206 0.2
OIL and GREASE 5.00 mg/I 5.00 mg/I 4.00 EPA 1664A 5
PHOSPHORUS(Total) 12.40 mg/I 0.20 mg/I 155.00 Hach 8190TNT 0.04
TOTAL DISSOLVED
SOLIDS(TDS) 568.00 mo 476.00 mg/I 3.00 SM2540 C 10
OTHER
END OF PART B.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 8 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
BASIC APPLICATION INFORMATION
PART C.CERTIFICATION
All applicants must complete the Certification Section. Refer to instructions to determine who is an officer for the purposes of this certification. All
applicants must complete all applicable sections of Form 2A,as explained in the Application Overview. Indicate below which parts of Form 2A you
have completed and are submitting. By signing this certification statement,applicants confirm that they have reviewed Form 2A and have completed
all sections that apply to the facility for which this application is submitted.
Indicate which parts of Form 2A you have completed and are submitting:
✓ Basic Application Information packet Supplemental Application Information packet:
✓ Part D(Expanded Effluent Testing Data)
✓ Part E(Toxicity Testing: Biomonitoring Data)
✓ Part F(Industrial User Discharges and RCRA/CERCLA Wastes)
Part G(Combined Sewer Systems)
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system or those persons directly responsible for gathering the information,the information is,to the best of my knowledge and
belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine
and imprisonment for knowing violations.
Name and official title Bryan Thompson
Signature
Telephone number 919-742-2323
Date signed 11/ // r
Upon request of the permitting authority,you must submit any other information necessary to assess wastewater treatment practices at the treatment
works or identify appropriate permitting requirements.
SEND COMPLETED FORMS TO:
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 9 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
SUPPLEMENTAL APPLICATION INFORMATION
PART D. EXPANDED EFFLUENT TESTING DATA
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd and Pretreatment Treatment Works. If the treatment works has a design flow greater than or equal to 1.0 mgd or it has
(or is required to have)a pretreatment program,or is otherwise required by the permitting authority to provide the data,then provide effluent testing
data for the following pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for
each outfall through which effluent is discharged. Do not include information on combined sewer overflows in this section. All information reported
must be based on data collected through analyses conducted using 40 CFR Part 136 methods. In addition,these data must comply with QA/QC
requirements of 40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
Indicate in the blank rows provided below any data you may have on pollutants not specifically listed in this form. At a minimum,effluent testing data
must be based on at least three pollutant scans and must be no more than four and one-half years old.
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE
Conc. Units Mass Units Conc. Units Mass Units Number ANALYTICAL MU MDL
of METHOD
Samples
METALS(TOTAL RECOVERABLE),CYANIDE,PHENOLS,AND HARDNESS.
ANTIMONY <0.025 mg/I <0.37 lbs <0.025 mg/I <0.37 lbs 3 EPA 220.7 0.025 mg/I
ARSENIC <0.01 mg/I <0.15 lbs <0.01 mg/I <0.15 lbs 3 EPA 220.7 0.010 mg/I
BERYLLIUM <0.005 mg/I <0.07 lbs <0.005 mg/I <0.07 lbs 3 EPA 220.7 0.005 mg/I
CADMIUM <0.002 mg/I <0.03 lbs <0.002 mg/I <0.03 lbs 3 EPA 220.7 0.002 mg/I
CHROMIUM <0.005 mg/I <0.07 lbs <0.005 mg/I <0.07 lbs 3 EPA 220.7 0.005 mg/I
COPPER 0.012 mg/I 0.18
lb 0.008 mg/I 0.12 lbs 3 EPA 220.7 0.002 mg/I
LEAD <0.01 mg/I <0.15 lbs <0.01 mg/I <0.15 lbs 3 EPA 220.7 0.010 mg/I
MERCURY .00624 ug/I 0.00009 lbs 0.0033 ug/I 0.00005 lbs 3 EPA 1631 0.001 mg/I
NICKEL <0.01 mg/I <0.15 lbs <0.01 mg/I <0.15 lbs 3 EPA 220.7 0.010 mg/I
SELENIUM <0.01 mg/I <0.07 lbs <0.01 mg/I <0.15 lbs 3 EPA 220.7 0.010 mg/I
SILVER <0.005 mg/I <0.07 lbs <0.005 mg/I <0.07 lbs 3 EPA 220.7 0.005 mg/I
THALLIUM <.0005 mg/I <0.07 lbs <.0005 mg/I <0.07 lbs 3 EPA 220.7 <.0005 mg/I
ZINC 0.016 mg/I 0.24 lbs .0133 mg/I 0.20 lbs 3 EPA 220.7 0.010 mg/I
CYANIDE 0.008 mg/I 0.12
lb <0.005 mg/I <0.07 lbs 3 EPA 335.4 0.005 mg/I
TOTAL PHENOLIC COMPOUNDS 0.029 mg/I 0.45 lbs 0.027 mg/I 0.41 lbs 3 EPA 420.1 0.010 mg/I
HARDNESS(AS CaCO3) 248 mg/I 3702 lbs 217 mg/I 3245 lbs 3 SM 2340 B 1 .0 mg/I
Use this space(or a separate sheet)to provide information on other metals requested by the permit writer.
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 10 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE
Conc. Units Mass Units Conc. Units Mass Units Number ANALYTICAL ML/MDL
of METHOD
Samples
VOLATILE ORGANIC COMPOUNDS.
ACROLEIN <50 ugh' <0.75 lbs <50 ugh' <0.75 lbs 3 EPA 624 50.00 ugh
ACRYLONITRILE <10 ugh <0.15 lbs <10 ugh <0.15 lbs 3 EPA 624 10.00 ug/I
BENZENE <1 ug/I <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
BROMOFORM <1 ugh' <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
CARBON TETRACHLORIDE <1 ugh <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
CLOROBENZENE <1 ugh <0.01 lbs <1 ugh <0.01 lbs 3 EPA 624 1 .00 ug/I
CHLORODIBROMO-METHANE <1 ugh <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
CHLOROETHANE <5 ug/I <0.07 lbs <5 ugh! <0.07 lbs 3 EPA 624 5.00 ug/I
2-CHLORO-ETHYLVINYL <5 ug/I <0.07 lbs <5 ug/I <0.07 lbs 3 EPA 624 5.00 ug/I
ETHER
CHLOROFORM 25.5 ug/I 0.38 lbs 16.2 ugh 0.24 lbs 3 EPA 624 1 .00 ug/I
DICHLOROBROMO-METHANE 5.93 ug/I 0.09 lbs 4.06 ug/I 0.06 lbs 3 EPA 624 1 .00 ug/I
1,1-DICHLOROETHANE <1 ugh <0.01 lbs <1 ugh <0,01 lbs 3 EPA 624 1 .00 ug/I
1,2-DICHLOROETHANE <1 ugh <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
TRANS-1,2-DICHLORO-ETHYLENE <1 ugh <0.01 lbs <1 ugh <0.01 lbs 3 EPA 624 1 .00 ug/I
1,1-DICHLOROETHYLENE <1 ug/I <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
1,2-DICHLOROPROPANE <1 ug/I <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
1,3-DICHLORO-PROPYLENE <1 ugh <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
ETHYLBENZENE <1 ug/I <0.01 lbs <1 ugh <0.01 lbs 3 EPA 624 1 .00 ug/I
METHYL BROMIDE <5 ug/I <0.07 lbs <5 ugh <0.07 lbs 3 EPA 624 5.00 ug/I
METHYL CHLORIDE <5 ug/I <0.07 lbs <5 ug/I <0.07 lbs 3 EPA 624 5.00 ug/I
METHYLENE CHLORIDE <1 ugh <0.01 lbs <1 ugh <0.01 lbs 3 EPA 624 1 .00 ug/I
1,1,2,2-TETRACHLORO-ETHANE <1 ug/I <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
TETRACHLORO-ETHYLENE <1 ug/I <0.01 lbs <1 ugh <0.01 lbs 3 EPA 624 1 .00 ug/I
TOLUENE <1 ug/I <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 11 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE
Conc. Units Mass Units Conc. Units Mass Units Number ANALYTICAL ML/MDL
of METHOD
Samples
1,1,1-TRICHLOROETHANE <1 ugh <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
1,1,2-TRICHLOROETHANE <1 ugh! <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
TRICHLORETHYLENE <1 ugh <0.01 lbs <1 ug/I <0.01 lbs 3 EPA 624 1 .00 ug/I
VINYL CHLORIDE <5 ugh <0.07 lbs <5 ug/I <0.07 lbs 3 EPA 624 5.00 ug/I
Use this space(or a separate sheet)to provide information on other volatile organic compounds requested by the permit writer.
ACID-EXTRACTABLE COMPOUNDS
P-CHLORO-M-CRESOL <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2-CHLOROPHENOL <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2,4-DICHLOROPHENOL <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2,4-DIMETHYLPHENOL <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
4,6-DINITRO-O-CRESOL <50 ug/I <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
2,4-DINITROPHENOL <50 ug/I <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
2-NITROPHENOL <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
4-NITROPHENOL <50 ugh! <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
PENTACHLOROPHENOL <50 ug/I <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
PHENOL <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2,4,6-TRICHLOROPHENOL <10 ugh! <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
Use this space(or a separate sheet)to provide information on other acid-extractable compounds requested by the permit writer.
BASE-NEUTRAL COMPOUNDS.
ACENAPHTHENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ugh
ACENAPHTHYLENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
ANTHRACENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
BENZIDINE <50 ug/I <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
BENZO(A)ANTHRACENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
BENZO(A)PYRENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 12 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE
Conc. Units Mass Units Conc. Units Mass Units Number ANALYTICAL MU MDL
of METHOD
Samples
3,4BENZO-FLUORANTHENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
BENZO(GHI)PERYLENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
BENZO(K)FLUORANTHENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
BIS(2-CHLOROETHOXY)
METHANE <10 ug/I <0.15 lbs <10 ugh' <0.15 lbs 3 EPA 625 10.00 ug/I
BIS(2-CHLOROETHYL)-ETHER <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
ETHER HLOROISO-PROPYL) <10 ugh <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
BIS(2-ETHYLHEXYL)PHTHALATE 15.1 ug/I 0.23 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
4-BROMOPHENYL PHENYL ETHER <10 ug/I <0.15 lbs <10 ug/I <0.15 I bs 3 EPA 625 10.00 ug/I
BUTYLBENZYLPHTHALATE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2-CHLORONAPHTHALENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
4-CHLORPHENYL PHENYL ETHER <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
CHRYSENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
DI-N-BUTYL PHTHALATE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
DI-N-OCTYLPHTHALATE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
DIBENZO(A,H)ANTHRACENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
1,2-DICHLOROBENZENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
1,3-DICHLOROBENZENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
1,4-DICHLOROBENZENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
3,3-DICHLOROBENZIDINE <50 ug/I <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
DIETHYL PHTHALATE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
DIMETHYL PHTHALATE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2,4-DINITROTOLUENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
2,6-DINITROTOLUENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
1,2-DIPHENYLHYDRAZINE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 13 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Slier City, NC0026441
Outfall number: _ (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE
Conc. Units Mass Units Conc. Units Mass Units Number ANALYTICAL MU MDL
of METHOD
Samples
FLUORANTHENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
FLUORENE <10 ugh' <0.15 lbs <10 ug/ <0.15 lbs 3 EPA 625 10.00 ug/I
HEXACHLOROBENZENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
HEXACHLOROBUTADIENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
HEXACHLOROCYCLO- <50 ug/I <0.75 lbs <50 ug/I <0.75 lbs 3 EPA 625 50.00 ug/I
PENTADIENE
HEXACHLOROETHANE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
INDENO(1,2,3-CD)PYRENE <10 ugh' <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ugh
ISOPHORONE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
NAPHTHALENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
NITROBENZENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 625.00 10.00 ug/I
N-NITROSODI-N-PROPYLAMINE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
N-NITROSODI-METHYLAMINE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
N-NITROSODI-PHENYLAMINE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
PHENANTHRENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
PYRENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ug/I
1,2,4-TRICHLOROBENZENE <10 ug/I <0.15 lbs <10 ug/I <0.15 lbs 3 EPA 625 10.00 ugh
Use this space(or a separate sheet)to provide information on other base-neutral compounds requested by the permit writer.
Use this space(or a separate sheet)to provide information on other pollutants(e.g.,pesticides)requested by the permit writer.
END OF PART D.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 14 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• Ata minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
✓ chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 1 Test number: 2 Test number: 3
a.Test information.
Test species&test method number Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0
Age at initiation of test 22.08 22.45 20.0
Outfall number 001 001 001
Dates sample collected 03/17/2014 06/02/2014 09/08/2014
Date test started 03/19/2014 06/04/2014 09/10/2014
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival &Reproduction test Survival & Reproduction test Survival& Reproduction test
Edition number and year of publication 4th, 2002 4th, 2002 4th, 2002
Page number(s) 141-196 141-196 141-196
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d. Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Test number: 1.00 Test number: 2.00 Test number: 3.00
e.Describe the point in the treatment process at which the sample was collected.
Sample was collected: Chlorine contact chamber Chlorine contact chamber Chlorine contact chamber
f.For each test,include whether the test was intended to assess chronic toxicity,acute toxicity,or both.
Chronic toxicity Yes Yes Yes
Acute toxicity
g.Provide the type of test performed.
Static Yes Yes Yes
Static-renewal
Flow-through
h.Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water Synthetic Synthetic Synthetic
Receiving water
i.Type of dilution water. It salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water Synthetic Synthetic Synthetic
Salt water
j.Give the percentage effluent used for all concentrations in the test series.
r gil;Ja;. r z ;,waii:P.e 90% 90% 90%
W1, fry z: f.mxOR xr RT .4 ,,,.tea
„.,.,,..,:7
k. Parameters measured during the test.(State whether parameter meets test method specifications)
pH 8.05 8.04 8.01
Salinity
Temperature 24.8 24.0 24.9
Ammonia
Dissolved oxygen 7.75 7.85 7.83
I.Test Results.
Acute:
Percent survival in 100% 0/0
effluent
LCso
95%C.I.
Control percent survival
Other(describe)
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Chronic:
NOEC 0/0
IC25 °/aok
Control percent survival 100.00 % 100.00 % 100.00%
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available? Yes Yes Yes
Was reference toxicant test within Yes Yes Yes
acceptable bounds?
What date was reference toxicant test 03/26/2014 06/26/2014 08/21/2014
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
Yes ✓ No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a
summary of the results.
Date submitted: (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
✓ chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 4 Test number: 5 Test number: 6
a.Test information.
Test species&test method number Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0
Age at initiation of test 24.2 22.08 21.05
Outfall number 001 001 001
Dates sample collected 12/01/2014 03/16/2015 06/01/2015
Date test started 12/03/2014 03/18/2015 06/02/2015
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival&Reproduction test Survival&Reproduction test Survival&Reproduction test
Edition number and year of publication 4th,2002 4th,2002 4th, 2002
Page number(s) 141-196 141-196 141-196
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d.Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Test number: 4.00 Test number: 5.00 Test number: 6.00
e.Describe the point in the treatment process at which the sample was collected.
Sample was collected: Chlorine contact chamber Chlorine contact chamber Chlorine contact chamber
f.For each test,include whether the test was intended to assess chronic toxicity,acute toxicity,or both.
Chronic toxicity Yes Yes Yes
Acute toxicity
g.Provide the type of test performed.
Static Yes Yes Yes
Static-renewal
Flow-through
h.Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water Synthetic Synthetic Synthetic
Receiving water
i.Type of dilution water. It salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water Synthetic Synthetic Synthetic
Salt water
j.Give the percentage effluent used for all concentrations in the test series.
.. ...._. r": . ..� 90% 90% 90%
,, ._
gagai
##YiAn,K.....'-AW,Wl.Y1Ati##.:,$NYlI,LMg-:lr:W�i;a W..,;fPNkWn ..,to'rrtk^,'AgJ.'3'
yiX+tttY..:. k'ifiq-Y'.Cr,"iAA,"# .'9;4W:Y.$N74 ,,::. AWik lLlF::'#
.rL19Wiisld..:.:... ,..'YYk '.;`lHg......i:.�� lT."ii2'z
k. Parameters measured during the test.(State whether parameter meets test method specifications)
pH 7.94 8.04 8.09
Salinity
Temperature 24.2 24.2 24.5
Ammonia
Dissolved oxygen 8.68 8.12 8.39
I.Test Results.
Acute:
Percent survival in 100%
effluent
LCso
95%C.I. % % %
Control percent survival % % %
Other(describe)
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
Chronic:
NOEC ok
1C25
Control percent survival 100.00 % 100.00 % 100.00%
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available? Yes Yes Yes
Was reference toxicant test within Yes Yes Yes
acceptable bounds?
What date was reference toxicant test 11/26/2014 03/18/2015 05/27/2015
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
Yes ✓ No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a
summary of the results.
Date submitted: (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
✓ chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 7 Test number: 8 Test number: 9
a.Test information.
Test species&test method number 'Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0
Age at initiation of test 21.0 21.73 21.45
Outfall number 001 001 001
Dates sample collected 09/14/2015 12/07/2015 03/07/2016
Date test started 09/16/2015 12/09/2015 03/09/2016
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival& Reproduction test Survival&Reproduction test Survival& Reproduction test
Edition number and year of publication 4th, 2002 4th, 2002 4th, 2002
Page number(s) 141-196 141-196 141-196
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d.Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
Test number: 7.00 Test number: 8.00 Test number: 9.00
e.Describe the point in the treatment process at which the sample was collected.
Sample was collected: Chlorine contact chamber Chlorine contact chamber Chlorine contact chamber
f.For each test,include whether the test was intended to assess chronic toxicity,acute toxicity,or both.
Chronic toxicity Yes Yes Yes
Acute toxicity
g.Provide the type of test performed.
Static Yes Yes 1 Yes
Static-renewal
Flow-through
h.Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water Synthetic Synthetic Synthetic
Receiving water
i.Type of dilution water. It salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water Synthetic Synthetic Synthetic
Salt water
j.Give the percentage effluent used for all concentrations in the test series.
90% 90% 90%
k. Parameters measured during the test.(State whether parameter meets test method specifications)
pH 8.06 8.28 7.94
Salinity
Temperature 24.5 25.0 24.3
Ammonia
Dissolved oxygen 7.97 8.51 8.43
I.Test Results.
Acute:
Percent survival in 100% 0/0
effluent
LCso
95%C.I.
Control percent survival
Other(describe)
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Chronic:
NOEC
1025
Control percent survival 100.00 % 100.00 % 100.00%
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available? Yes Yes Yes
Was reference toxicant test within Yes Yes Yes
acceptable bounds?
What date was reference toxicant test 09/30/2015 12/02/2015 03/02/2016
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
Yes I No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a
summary of the results.
Date submitted: (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
✓ chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 10 Test number: 11 Test number: 12
a.Test information.
Test species&test method number Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0
Age at initiation of test 21.95 22.45 22.07
Outfall number 001 001 001
Dates sample collected 06/06/2016 09/12/2016 12/05/2016
Date test started 06/08/2016 09/14/2016 12/07/2016
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival&Reproduction test Survival&Reproduction test Survival&Reproduction test
Edition number and year of publication 4th, 2002 4th, 2002 4th, 2002
Page number(s) 141-196 141-196 141-196
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d.Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Test number: 10.00 Test number: 11.00 Test number: 12.00
e.Describe the point in the treatment process at which the sample was collected.
Sample was collected: Chlorine contact chamber Chlorine contact chamber Chlorine contact chamber
f.For each test,include whether the test was intended to assess chronic toxicity,acute toxicity,or both.
Chronic toxicity Yes Yes Yes
Acute toxicity
g.Provide the type of test performed.
Static Yes Yes Yes
Static-renewal
Flow-through
h.Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water Synthetic Synthetic Synthetic
Receiving water
i.Type of dilution water. It salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water Synthetic Synthetic Synthetic
Salt water
j.Give the percentage effluent used for all concentrations in the test series.
1 Wry 1.00000 .111 900 900 90%
Wl1i' AX' J i- 1"0141, 1110#I .1411 l#
'lr�.�,0 k kwy;,;S52NlW:lfgt ...Y.AW,N#At}R,'+hiY.Nlai,z l su014
i,W„W00 114OfiN'x.;,.Yffit aii ;?tNJJhWg .. ,*s. rr� ""
Y9/:_R;';'H,AYiv1✓FgWAW,Y,to---�'.7kW/JIRflG.,vHiiWlrYA'k. $Wb ...,,n,"/,j;
E
k.Parameters measured during the test.(State whether parameter meets test method specifications)
pH 8.05 8.05 8.03
Salinity
Temperature 25.1 25.0 24.6
Ammonia
Dissolved oxygen 7.78 8.03 8.39
I.Test Results.
Acute:
Percent survival in 100%
effluent
LC50
95%C.I. 0/0
Control percent survival
Other(describe)
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 21

FACILITY NAME AND PERMIT NUMBER: FomiApproved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
Chronic:
NOEC
1025
Control percent survival 100.00 % 91.67 % 100.00%
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available? Yes Yes Yes
Was reference toxicant test within Yes Yes Yes
acceptable bounds?
What date was reference toxicant test 06/01/2016 09/07/2016 11/30/2016
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
Yes ✓ No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a
summary of the results.
Date submitted: (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
✓ chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 13 Test number: 14 Test number: 15
a.Test information.
Test species&test method number Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0
Age at initiation of test 22.07 23.17 23.08
Outfall number 001 001 001
Dates sample collected 12/05/2016 03/20/2017 06/12/2017
Date test started 12/07/2016 03/22/2018 06/14/2017
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival& Reproduction test Survival& Reproduction test Survival& Reproduction test
Edition number and year of publication 4th, 2002 4th, 2002 4th, 2002
Page number(s) 141-196 141-196 141-196
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d. Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Test number: 13.00 Test number: 14.00 Test number: 15.00
e.Describe the point in the treatment process at which the sample was collected.
Sample was collected: Chlorine contact chamber Chlorine contact chamber Chlorine contact chamber
f.For each test,include whether the test was intended to assess chronic toxicity,acute toxicity,or both.
Chronic toxicity Yes Yes Yes
Acute toxicity
g.Provide the type of test performed.
Static Yes Yes Yes
Static-renewal
Flow-through
h.Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water Synthetic Synthetic Synthetic
Receiving water
i.Type of dilution water. It salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water Synthetic Synthetic Synthetic
Salt water
j.Give the percentage effluent used for all concentrations in the test series.
tr
eta, „
070 900/0 90%
.0* 0*- .11 -✓;i i4"/ .f/.4" /�,,,;;•
k. Parameters measured during the test.(State whether parameter meets test method specifications)
pH 7.83 7.98 7.92
Salinity
Temperature 24.6 24.9 24.4
Ammonia
Dissolved oxygen 8.39 8.29 8.05
I.Test Results.
Acute:
Percent survival in 100%
effluent
LC50
95%C.I. % % %
Control percent survival
Other(describe)
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Chronic:
NOEC
IC25
Control percent survival 100.00 % 92.00 % 100.00%
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available? Yes Yes Yes
Was reference toxicant test within Yes Yes Yes
acceptable bounds?
What date was reference toxicant test 11/30/2016 03/29/2017 06/21/2017
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
Yes ✓ No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a
summary of the results.
Date submitted: (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
Town of Siler City, NC0026441 OMB Number 2040-0086
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
✓ chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 16 Test number: 17 Test number: 18
a.Test information.
Test species&test method number Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0
Age at initiation of test 23.08 22.17 22.57
Outfall number 001 001 001
Dates sample collected 09/11/2017 12/11/2017 03/19/2018
Date test started 09/13/2017 12/13/2018 03/21/2018
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival&Reproduction test Survival&Reproduction test Survival&Reproduction test
Edition number and year of publication 4th, 2002 4th, 2002 4th, 2002
Page numbers 141-196 141-196 141-196
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d.Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Test number: 16.00 Test number: 17.00 Test number: 18.00
e.Describe the point in the treatment process at which the sample was collected.
Sample was collected: Chlorine contact chamber Chlorine contact chamber Chlorine contact chamber
f.For each test, include whether the test was intended to assess chronic toxicity,acute toxicity,or both.
Chronic toxicity Yes Yes Yes
Acute toxicity
g.Provide the type of test performed.
Static Yes Yes Yes
Static-renewal
Flow-through
h.Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water Synthetic Synthetic Synthetic
Receiving water
i.Type of dilution water. It salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water Synthetic Synthetic Synthetic
Salt water
j.Give the percentage effluent used for all concentrations in the test series.
gSgagiaag Y✓'lJa `"'fi'di, 0 900
k .�R�� J� s,i90°/0 90
k}4#0.4 'h JIHAkW?'J 'J:DIr Allr >,,".
ki;£03g..:0*W /�ik`,YkN4'h?0:i/.r.Wi ,&lA :,d ,e, ..JG7i'
„r;+�skNk'/d �W,,:,�.. dUk e.,,.,t,n✓lAz,.,...,.,wmWl�d; ,,,,,-t.»>WXA1vn�,.r
dwA.kS.,;,,:._,.itis v-z.--W,i dHi;, .<Yh ZY J.q-"„61
k.Parameters measured during the test.(State whether parameter meets test method specifications)
pH 7.86 7.91 7.54
Salinity
Temperature 24.3 24.3 24.2
Ammonia
Dissolved oxygen 7.88 8.46 7.83
I.Test Results.
Acute:
Percent survival in 100%
effluent
LC50
95%C.I.
Control percent survival
Other(describe)
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
Chronic:
NOEC ok
IC25
Control percent survival 100.00 % 100.00 % 100.00%
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available? Yes Yes Yes
•
Was reference toxicant test within Yes Yes Yes
acceptable bounds?
What date was reference toxicant test 09/06/2017 12/27/2017 03/28/2018
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
Yes I No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a
summary of the results.
Date submitted: (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW TO DETERMINE WHICH OTHER PARTS OF FORM
2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 21

FACILITY NAME AND PERMIT NUMBER: Form Approved 1/14/99
OMB Number 2040-0086
Town of Siler City, NC0026441
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of
the facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd; 2)POTWs with a pretreatment program(or those
that are required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of
two species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the
results show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do
not include information on combined sewer overflows in this section. All information reported must be based on data collected through
analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136
and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity
test conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results
of a toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using alternate
methods. If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years.
I chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: 19 Test number: 20 Test number: 21
a.Test information.
Test species&test method number Ceriodaphnia, EPA 1002.0 Ceriodaphnia, EPA 1002.0 FatHead Minnow, EPA1000.0
Age at initiation of test 21.58 21.68 2319.0
Outfall number 001 001 001
Dates sample collected 06/11/2018 09/10/2018 03/20/2017
Date test started 06/13/2018 09/12/2018 03/21/2017
Duration 7 days 7 days 7 days
b.Give toxicity test methods followed.
Manual title Survival& Reproduction test Survival&Reproduction test Survival&Growth test
Edition number and year of publication 4th, 2002 4th, 2002 4th, 2002
Page number(s) 141-196 141-196 53-111
c.Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite Yes Yes Yes
Grab
d. Indicate where the sample was taken in relation to disinfection.(Check all that apply for each)
Before disinfection
After disinfection Yes Yes Yes
After dechlorination Yes Yes Yes
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 21

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