NC0026441_Permit (Issuance)_20220928

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
r�
ROY COOPER i i 1
Governor ;fir,,„, .
ELIZABETH S.BISER `
• •
Secretary ;
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
September 28,2022
Mr. Roy Lynch, Town Manager
Town of Siler City
PO Box 769
Siler City,North Carolina 27344
Subject: Final NPDES Permit Renewal &Expansion
Permit NC0026441
Siler City WWTP
Chatham County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Lynch:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between
North Carolina and the U.S.Environmental Protection Agency dated October 15,2007(or as subsequently
amended).
The following changes were made to the second draft permit sent to you on July 12,2022:
• Based on the facility's compliance status, comments received on the second draft permit, and
concerns regarding lowering nutrient discharge concentrations, a Nitrogen Removal Optimization
special condition has been added to the permit[See A. (8.)(a.)].
• Based on the facility's compliance status with pollution sources identified upstream of the treatment
system, a Pretreatment Program Update special condition has been added to the permit [See A.
(8.)(b.)].
• Based on the facility's compliance status, monitoring frequencies for BOD, TSS and Fecal
Coliform have been increased to daily.
• Based on the permit effective date, the AtC submittal deadline has been revised to November 30,
2022. In addition,minor typographical corrections were made.
See the attached Fact Sheet Addendum for further information.
The following changes were made on the draft permit sent to you on March 22,2022 as a second draft
permit sent to you on July 12, 2022:
• Based on Reasonable Potential Analysis (RPA) results reinterpreted as showing that the several
non-detects were at a level above allowable concentrations, Total Cadmium limits were reinstated
and lowered at both flow tiers [see A. (1.) and A. 2.)].
• Based on updated RPA results showing reasonable potential to exceed stream standards, limits
were added for Chlorides with monthly monitoring at both flow tiers [see A. (1.)and A. 2.)].
• Based on updated RPA results predicting a maximum effluent zinc concentration that is greater
than half of the allowable discharge concentration base on state water quality standards, quarterly
monitoring for Total Zinc was reinstated at both flow tiers [see A. (1.)and A. 2.)].
D_E N Q I Divou
512 Northorth SaCarolinalisburyDepartment Street I
of1611Env Mailironmental Service Centeruality I Raleigh,NorthWater CaroReslinarces699-1611 27
o.n l of En
wcn+riW \ �/ 919.707.9000

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
• Based on updated RPA results showing reasonable potential to exceed stream standards from one
high value in conjunction with high values of several other parameters,monitoring for Total Copper
has been increased from quarterly to monthly [See A. (1.)and A. (2.)].
• Based on the equivalent effluent concentration of 15 mg/L Total Nitrogen (TN) at 4.0 MGD, the
first interim TN load limit has been lowered to 182,646 lb/yr effective upon issuance until
December 31, 2022. This limit is followed by the calendar year 2023 interim TN limit, raised to
146,117 lb/yr, which is the equivalent of 12 mg/L TN [See (A. (1.)]. For calendar year 2024, the
weighted annual load limit was revised to 115,678 lb/yr based on the combine mass of an eight-
month load at 146,117 lb/yr (i.e., 97,411 lb) from 1/1/2024-8/31/2024 and four-month load at
58,800 lb/yr(i.e., 18,2671b)from 9/1/2024-12/31/2024 [See A. (1.)and A. (2.)].
• Based on the review of available data, monitoring for PFAS has been increased from 2/year to
quarterly [See A. (14.)].
• Instream monitoring for Ammonia has been increased to match frequencies of nutrients for
instream impact[See A. (3.)].
• Based on its relation to Ammonia toxicity, instream monitoring for pH has been added at
frequencies to match those of nutrients and ammonia[See A. (3.)].
• Based on instream monitoring frequencies being greater than monthly, the waiver for monitoring
coalition membership has been removed [See A. (3.)].
• Based on the current status of the facility, an annual instream biological integrity assessment
requirement, to be performed by a NC-certified entity, has been added to the permit as a special
condition [See A. (4.)].
• Based on consideration of the scheduled construction delays, the compliance schedule for facility
expansion and TN Load Limit has been modified [See A. (9.)]:
o The AtC submittal deadline was extended(Step 1);
o Construction deadline for the third train was extended to August 31,2024(Step 5);
o The weighted TN load limit was adjusted to reflect the construction deadline delay(Step
7).
• Special Condition A.(6.)has been modified to include the specific three years in which the Effluent
Pollutant Scan shall be performed(2024,2025, and 2026),based on the permit expiration date.
This final permit maintains the following significant changes identified in the letter sent on March
22, 2022:
• A component list for the proposed 6.0 MGD expansion flow tier has been added to the Supplement
to Permit Cover Sheet.
• Based on instream analysis suggesting effluent impact on the receiving water conductivity and the
WWTP receiving industrial wastewater with a pretreatment program, daily monitoring of effluent
Conductivity has been added to the permit [See A. (1.)and A. (2.)].
• The final Total Nitrogen (TN) annual loading limit has been revised to 54,800 lb/yr effective
January 1, 2025 with loading monitored weekly at both the 4.0 and 6.0 MGD flow tiers [See A.
(1.)and A. (2.)].
• To allow the Permittee time for construction toward the 6.0 MGD expansion and meet the TN load
limit, an updated compliance schedule, approved on March 15, 2022,has been added with interim
limits and reporting requirements [See A. (9.)].
• Because the TN load limits are annual limits (defined as calendar year), their effective dates have
been adjusted to start on January 1 and end on December 31 of the respective year(see A. (1.)and
A. (2.)].
• The Division is implementing dissolved metals standards in all permits, per the 2016 revisions to
State water quality standards.As such, the NPDES Permitting Unit will need site-specific effluent
hardness data and instream hardness data, upstream of the discharge, for each facility monitoring
these metals in order to calculate permit limitations. Effluent hardness and instream hardness
sampling, upstream of the discharge, have been added to the permit at a monitoring frequency of
quarterly [See A. (1.) and A. (2.)].
Page 2 of 5

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
• The Town of Siler City reported all but one Total Cadmium results at less than detection, with
detection level<2 µg/L. The Town's allowable discharge concentration is 1.6 µg/L at 4.0 and 6.0
MGD flow tiers. DWR's laboratory identifies the target Practical Quantification Limits(PQLs)for
Total Cadmium is 1.0 µg/L. 15A NCAC 2B .0505 (e) (4) requires that all test procedures must
produce detection and reporting levels that are below the permit discharge requirements and all
data generated must be reported to the approved detection level or lower reporting level of the
procedure. If no approved methods are capable of achieving a detection level below the permit
discharge requirement(or allowable discharge concentration)the method with the lowest detection
level must be used.The Town should use sufficiently sensitive test methods for all pollutants.Total
Cadmium limits samples shall be analyzed and reported to the lower reporting level at both flow
tiers [See A. (1.) and A. (2.)].
• The Town of Siler City reported Total Selenium and Total Silver at less than detection, with
detection levels < 10.0 µg/L, and < 5.0 µg/L respectively. The Town's allowable discharge
concentrations are 5.2 µg/L and 0.06 µg/L for Total Selenium and Total Silver, respectively.
DWR's laboratory identifies the target Practical Quantification Limits(PQLs) for both parameters
is 1.0 µg/L. As for Total Cadmium above, 15A NCAC 2B .0505 (e) (4) requires that all test
procedures must produce detection and reporting levels that are below the permit discharge
requirements and all data generated must be reported to the approved detection level or lower
reporting level of the procedure. Quarterly monitoring has for Total Selenium and Total Silver has
been added to the permit[See A. (1.) and A. (2.)].
• Based on RPA predicting the maximum effluent Bis(2-ethylhexyl)phthalate concentration that is
greater than the allowable discharge concentration based on state water quality standards for small
sample sizes (n < 8 samples) with one of the three Effluent Pollutant Scan data exceeding the
allowable discharge concentration, quarterly monitoring for Bis (2-ethylhexyl)phthalate has been
added to the permit at both flow tiers [See A. (1.)and A. (2.)].
• Based on limited dataset from the investigative sampling in 2019 indicating detectable levels in the
influent, monthly effluent monitoring for 1,4-Dioxane has been added to the permit [See A. (1.)
and A. (2.)].
• A permit reopener special condition has been added to modify 1,4-Dioxane monitoring,treatment
and/or compliance [See A. (13.)].
• A special condition to monitor effluent PFAS chemicals has been added to the permit, to be
effective six(6)months after EPA has a final wastewater method in 40 CFR 136 method published
in the Federal Register[See A. (14.)].
• Based on Mercury TMDL evaluation showing mercury values reported at levels> 1 ng/L and since
the permitted flow is >2 MGD, Special Condition A. (12.) Mercury Minimization Plan has been
revised.
• Based on the Town's application for the permit, effluent limits and monitoring page for 6.0 MGD
flow expansion has been added to the permit [See A. (2.)].
• For protection of the instream dissolved oxygen water quality standard from nitrogenous oxygen
demand, Total Organic Nitrogen limits of 3.0/4.5 mg/L monthly/weekly average at 6.0 MGD with
a weekly sampling frequency during the months April through October were added to the permit
[See A. (2.)].
• Instream monitoring for Ammonia-Nitrogen, Fecal Coliform and Conductivity at the four existing
sampling locations has been added to the permit[See A. (3.)].
• Some of the wording has changed in Special Condition A. (5.), Chronic Toxicity Permit Limit,
please review eachparagraph carefull .
Y
• A notation was made concerning the Electronic Reporting Rule —NPDES Electronic Reporting
Rule—Phase 2 Extension.EPA extended the Phase 2 deadline to December 21,2025 [See A.(15.)].
• Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The requirement to continue reporting discharge monitoring data electronically
using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has
been added to your NPDES permit[See A. (15.)].
Page 3 of 5

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements for
q
both flow tiers [See A. (1.) and A. (2.)] as well as the Instream Monitoring Requirements (See A.
(3.)] and Effluent Pollutant Scans [See A. (6.)].
• Regulatory citations have been added to the permit.
• The topographical map has been updated to include the 6.0 MGD flow tier as well as showing
instream monitoring locations.
Pretreatment updates in response to NPDES permit renewal:
• On April 30, 2023, 180 days after the effective date of this NPDES permit renewal, the Town is
required to submit to the Division a written technical evaluation of the need to revise local limits
(i.e., an updated IWS/HWA-AT/L-STMP, or documentation of why is not needed). This action
may include revising,updating,or adding to the list of SIUs regardless of timeframe.
o Submit the updated Short-Term Monitoring Plan(STMP)
• If there are new industries within the service area, submit an updated Industrial
Waste Survey(IWS)
• Review pollutants of concern(POCs)and update the STMP to reflect pollutants in
industrial user permits(lUPs) and sludge management permit.
• Update the POC PQLs to recommended levels:
• Arsenic (As)at 2.0 µg/L
• Cadmium(Cd)at 0.5 µg/L
• Lead(Pb)at 2.0 µg/L
• Molybdenum(Mo)at 10.0 at µg/L
• Silver(Ag)at 1.0 at 2.0 µg/L
o As part of the local limits assessment, please submit the updated Headworks Analysis
(HWA).
The NPDES standard conditions (Parts II, III, and IV)that are a part of the permit are not included in this
draft document(cover, map, and Part I). The conditions are the same as in your current permit except that
agency and division names have been updated. The latest version is available at https://bit.ly/3k5NFaL and
can be viewed online or downloaded as a PDF file.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you,you have the right to an adjudicatory hearing upon written request within thirty(30)days following
receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of
the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail
Service Center,Raleigh,North Carolina 27699-6714). Unless such demand is made, this decision shall be
final and binding.
Please note that this permit is not transferable except after notice to the Division.The Division may require
modification or revocation and reissuance of the permit.This permit does not affect the legal requirements
to obtain other permits which may be required by the Division of Water Resources or any other Federal,
State,or Local governmental regulations.
If you have any questions concerning this permit, please contact Gary Perlmutter at(919) 707-3611 or via
email at [e-mail].
Sincerely,
n,Doc'u, I
Sign•d byy:, `d. II•'+`
C464531431644FE_.
for Richard E. Rogers Jr., Director
Division of Water Resources,NCDEQ
Page 4 of 5

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality/Scott Vinson
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Basin Planning Branch/Nora Deamer
DWR/Aquatic Toxicology Branch/Zach Thomas and Cindy Moore
DWR/Municipal Permitting Unit/Keyes McGee
DWR/NPDES Industrial Permitting/Min Xiao
McGill Associates/David Honeycutt(consultant)
Rocky River Watch/Albert Cooke
SELC/Blakely Hildebrand and Jean Zhuang
NC WRC/Brena Jones
USFWS/Emily Wells
Page 5 of 5

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act,as amended,the
Town of Siler City
is hereby authorized to discharge wastewater from a facility located at the
Siler City WWTP
198 Utility Drive
Siler City, NC 27344
Chatham County
to receiving waters designated as Loves Creek in the Cape Fear River Basin in accordance with effluent
limitations, monitoring requirements,and other conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective November 1,2022.
This permit and authorization to discharge shall expire at midnight on May 31, 2027.
Signed this day September 28,2022.
IDocuSlgned byy:uk iy 1..,'
C464531431644FE...
for Richard E. Rogers,Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As
of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the
exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements,
terms, and provisions included herein.
The Town of Siler City is hereby authorized to:
1. Continue to operate an existing 4.0 MGD wastewater treatment system consisting of the following:
• Automatic and manual bar screens
• Grit collection unit
• Influent pump station
• Influent Equalization Basin(Zone 2)
• Dual oxidation ditches with surface jet aeration
• Flow Splitter Box
o Alum feed station
o Lime feed station
• Dual secondary clarifiers
• Dual Aerobic digesters
• Return Activated Sludge
• Sludge Transfer Station
• Dissolved Air Flotation Unit(Used as needed)
• Sludge Thickener Basin
• Influent equalization or Sludge Storage Basins(Zone 3 A& B used as needed)
• Four(4)tertiary filters
• Filter Backwash Basin
• Gaseous Chlorine Disinfection
• Chlorine contact chamber
• Gaseous Sulfur Dioxide Dechlorination
• Step-Aeration
The facility is located at the 198 Utility Drive, Siler City, in Chatham County;
2. After receiving an Authorization to Construct from the Division, construct a 6.0 MGD wastewater
treatment system; and after the Division receives the Engineer Certification of construction completion,
operate above system. The draft upgraded system includes the following upgraded/additional
components:
• Upgraded headworks including duplex mechanical bar screens and grit removal
• Upgraded influent pump station(firm capacity 18 MGD)
• Two(2) 100 hp blowers
• One additional oxidation ditch with baffles, aeration and mixing equipment to create aerobic,
anaerobic and anoxic zones
• One additional clarifier
• Effluent denitrification filters
• UV disinfection system
• Solids handling facility with filter press
3. Discharge from said treatment works at the location specified on the attached map into Loves Creek,
classified C waters in the Cape Fear River Basin.
Page 2 of 19

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(4.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G.0302]
a. During the period beginning on the effective date of the permit and lasting until expansion to 6.0 MGD(and
receipt of the Engineer's Certificate of completion)or until expiration,the Permittee is authorized to discharge
treated domestic and industrial wastewater from Outfall 001. Such discharges shall be limited and
monitored' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample Location
Average Average Maximum Frequency Type
Flow 50050 4.0 MGD Continuous Recording Influent or
Effluent
Total Monthly Flow 82220 Monitor and Report Monthly Recording Influent or
(MG/mo) or Calculated Effluent
BOD,5-day,20°C z 5.0 mg/L 7.5 mg/L Daily Composite Influent and
April 1 —October 31 Effluent
C0310
BOD,5-day,20°C 2 10.0 mg/L 15.0 mg/L Daily Composite Influent and
November 1 —March 31 Effluent
Total Suspended Solids Influent and
(TSS)Z C0530 30.0 mg/L 45.0 mg/L Daily Composite Effluent
Ammonia(NH3 as N) 1.0 mg/L 3.0 mg/L Daily Composite Effluent
April 1—October 31
C0610
Ammonia(NH3 as N) 2.0 mg/L 6.0 mg/L Daily Composite Effluent
November 1—March 31
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab Effluent
(geometric mean)
Total Residual Chlorine 50050 17.0 /L DailyGrab Effluent
(TRC)3 µg
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily Average_?6.0 mg/L Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent
Conductivity(mhos/cm) 00094 Monitor and Report Daily Grab Effluent
NO2-N+NO3-N(mg/L) 00630 Monitor and Report Weekly Composite Effluent
TKN(mg/L) 00625 Monitor and Report Weekly Composite Effluent
Total Nitrogen(TN),mg/L 4 C0600 Monitor and Report Weekly Calculated Effluent
QM600 Monitor and Report(lb/mo)(permit cycle) Monthly
QY600 182,646 lb/yr(eff.through 12/31/2022) Annually
TN Load 5 QY600 146,117 lb/yr(eff. 1/1/2023-12/31/2023)6 Annually Calculated Effluent
QY600 115,678 lb/yr(eff. 1/1/2024-12/31/2024)7 Annually
QY600 54,800 lb/yr(eff. 1/1/2025)8 Annually
Total Phosphorus(TP)9 C0665 0.5 mg/L(quarterly average) Weekly Composite Effluent
April 1 —October 31
Total Phosphorus(TP)9 C0665 2.0 mg/L(quarterly average) Weekly Composite Effluent
November 1 —March 31
Total Hardness(as CaCO3), 00900 Monitor and Report Quarterly Grab Effluent
m
Page 3 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample Location
Average Average Maximum Frequency Type
Total Cadmium(as Cd) 01027 1.6 µg/L 10.2 µg/L Monthly Composite Effluent
Total Copper(as Cu) 01042 Monitor and Report Monthly Composite Effluent
Total Selenium(as Se) 01147 Monitor and Report Quarterly Composite Effluent
Total Silver(as Ag) 01077 Monitor and Report Quarterly Composite Effluent
Chloride(as C1) 00940 233 mg/L Monthly Composite Effluent
Total Zinc(as Zn) 01092 Monitor and Report Quarterly Composite Effluent
Bis(2-ethylhexyl)phthalate 39100 Monitor and Report Quarterly Grab Effluent
1,4-Dioxane 11 82388 Monitor and Report Monthly Grab Effluent
PFAS various Footnote 12 Footnote 12 Grab Effluent
Chronic Toxicity 13 TGP3B Pass/Fail Ceriodaphnia dubia at 90% Quarterly Composite Effluent
effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 14 Footnote 14 Effluent
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system. See Section A. (15.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15%of the respective influent value(85%
removal).
3. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent total
residual chlorine values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall
continue to record and submit all values reported by a North Carolina certified laboratory(including field-certified),even
if these values fall below 50 µg/L.
4. Total Nitrogen(TN)is defined as NO3-N+NO2-N+TKN,where NO3-N is nitrate nitrogen,NO2-N is nitrite nitrogen,
and TKN is total Kjeldahl Nitrogen.
5. TN Load is the mass quantity of Total Nitrogen discharged in a given period of time. See Section A.(7.),Calculation of
Total Nitrogen Loads.
6. Limit to be applied if the facility does not complete upgrade to 6.0 MGD by 12/31/2023.
7. Limit is the combined mass of the interim load limit of 146,117 lb/yr from 1/1/2024-8/31/2024 and final load limit of
58,800 lb/yr from 9/1/2024-12/31/2024,to be applied for calendar year 2024 only.
8. The Permittee shall follow the schedule to upgrade the facility to 6.0 MGD. See A.(9.).
9. Compliance with the Total Phosphorus limits shall be based on a calendar-quarter average of weekly samples.
10. Effluent Total Hardness sampling should be performed in conjunction with testing for hardness-dependent metals
(cadmium,copper,lead,nickel, silver,and zinc).
11. Samples must be reported to a minimum of PQL< 1 µg/L using EPA Method 624.1.
12. See Special Condition A.(14.).
13. Whole Effluent Toxicity will be monitored using the Pass/Fail Ceriodaphnia dubia at 90% effluent. Samples shall be
taken in March,June, September and December. See Section A.(5.).
14. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See Section A.(6.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 19

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(6.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G.0302]
a. During the period beginning upon receipt of the Engineer's Certificate of completion for expansion to 6.0
MGD and lasting until expiration,the Permittee is authorized to discharge treated domestic and industrial
wastewater from Outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified
below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample Location
Average Average Maximum Frequency Type
Flo\` _50050 6.0 MGD Continuous Recording Influent or
Effluent
Total Monthly Flow 82220 Monitor and Report Monthly Recording Influent or
(MG/mo) or Calculated Effluent
BOD,5-day,20°C 2 5.0 mg/L 7.5 mg/L Daily Composite Influent and
April 1 —October 31 Effluent
C0310
BOD,5-day,20°C 2 10.0 mg/L 15.0 mg/L Daily Composite Influent and
November 1—March 31 Effluent
Total Suspended Solids C0530 20.0 mg/L 30.0 mg/L Daily Composite Influent and
(TSS)2 Effluent
Ammonia(NH3 N) 1.0 mg/L 3.0 mg/L Daily Composite Effluent
October 1—Octobea r 31
C0610
Ammonia(NH3 as N) 1.9 mg/L 5.7 mg/L Daily Composite Effluent
November 1 —March 31
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab Effluent
(geometric mean)
T(TotRaCl Residual Chlorine 50050 17.0❑g/L Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily Average>7.0 mg/L Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent
Conductivity(µmhos/cm) 00094 Monitor and Report Daily Grab Effluent
Total Organic Nitrogen 00605 3.0 mg/L 4.5 mg/L Weekly Composite Effluent
April 1 —October 31
NO2-N+NO3-N(mg/L) 00630 Monitor and Report Weekly Composite Effluent
TKN(mg/L) 00625 Monitor and Report Weekly Composite Effluent
Total Nitrogen(TN),mg/L 4 C0600 Monitor and Report Weekly Calculated Effluent
QM600 Monitor and Report(lb/mo) Monthly
TN Load 5 QY600 115,678 lb/yr(eff. 1/1/2024)6 Annually Calculated Effluent
QY600 54,800 lb/yr(eff 1/1/2025) Annually
Total Phosphorus(TP)7C0665 0.5 mg/L(quarterly average) Weekly Composite Effluent
April 1 —October 31
Total Phosphorus(TP)7C0665 2.0 mg/L(quarterly average) Weekly Composite Effluent
November 1 —March 31
Total Hardness as
mg/L s ( CaCO3), 00900 Monitor and Report Quarterly Grab Effluent
Page 5 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample Location
Average Average Maximum Frequency Type
Total Cadmium(as Cd) 01027 1.6 µg/L 10.2 µg/L Monthly Composite Effluent
Total Copper(as Cu) 01042 Monitor and Report Monthly Composite Effluent
Total Selenium(as Se) 01147 Monitor and Report Quarterly Composite Effluent
Total Silver(as Ag) 01077 Monitor and Report Quarterly Composite Effluent
Total Zinc(as Zn) 01092 Monitor and Report Quarterly Composite Effluent
Chloride(as Cl) 00940 232 mg/L Monthly Composite Effluent
Bis(2-ethylhexyl)phthalate 39100 Monitor and Report Quarterly Grab Effluent
1,4-Dioxane 9 82388 Monitor and Report Monthly Grab Effluent
PFAS various Footnote 10 Footnote 10 Grab Effluent
Pass/Fail Ceriodaphnia dubia at 90%
i i
Chronic Toxicity TGP3B effluent Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 12 Footnote 12 Effluent
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system.See Section A.(15.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15%of the respective influent value(85%
removal).
3. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent total
residual chlorine values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall
continue to record and submit all values reported by a North Carolina certified laboratory(including field-certified),even
if these values fall below 50 mg/L.
4. Total Nitrogen(TN)is defined as NO3-N+NO2-N+TKN, where NO3-N is nitrate nitrogen,NO2-N is nitrite nitrogen,
and TKN is total Kjeldahl Nitrogen.
5. TN Load is the mass quantity of Total Nitrogen discharged in a given period of time. See Section A.(7.),Calculation of
Total Nitrogen Loads.
6. Limit is the combined mass at the interim load limit of 146,117 lb/yr(i.e.,97,411 lb)from 1/1/2024-8/31/2024 and final
load limit of 58,800 lb/yr(i.e., 18,267 lb)from 9/1/2024-12/31/2024,to be applied for calendar year 2024 only.
7. Compliance with the Total Phosphorus limits shall be based on a calendar-quarter average of weekly samples.
8. Effluent Total Hardness sampling should be performed in conjunction with testing for hardness-dependent metals
(cadmium,copper,lead,nickel,silver,and zinc).
9. Samples must be reported to a minimum of PQL<1 µg/L using EPA Methd 624.1.
10. See Special Condition A.(14.).
11. Whole Effluent Toxicity will be monitored using the Pass/Fail Ceriodaphnia dubia at 90%effluent. Samples shall be
taken in March,June, September and December. See Section A.(5.).
12. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See Section A.(6.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (3.) INSTREAM MONITORING REQUIREMENTS [15A NCAC 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee shall
conduct instream monitoring as specified below:
PARAMETER MEASUREMENT
SAMPLE TYPE LOCATION' FREQUENCY 2
Parameter Code FRE Q
Total Hardness(as CaCO3),mg/L 3 00900 Grab LCU 1/Quarter
Dissolved Oxygen(DO),mg/L 00300 Grab LCU,LCD,RRU,RRD 3/Week(June—September),
1/Week(October-May)
Temperature(°C) 00010 Grab LCU,LCD,RRU,RRD 3/Week(June—September),
1/Week(October-May)
Fecal Coliform(cfu/100 mL) 31616 Grab LCU,LCD,RRU,RRD 1/Month
Conductivity(µmhos/cm) 00094 Grab LCU,LCD,RRU,RRD 3/Week(May September),
1/Week(October—April)
(June— t
3/Week
September),
,
Total Phosphorus(mg/L) C(�665 Grab LCU,LCD,RRU,RRD
P )
1/Week(October-May)
TKN(mg/L) 00625 Grab LCU,LCD,RRU,RRD 3/Week(June—September),
1/Week(October-May)
NO2+NO3(mg/L) 00630 Grab LCU,LCD,RRU,RRD 3/Week(June—September),
1/Week(October-May)
Ammonia(NH3 as N) C0610 Grab LCU,LCD,RRU,RRD 3/Week(June—September),
1/Week(October-May)
pH 00400 Grab LCU,LCD,RRU,RRD 3/Week(June September),
1/Week(October-May)
Footnotes:
1. LCU = Loves Creek, upstream of the discharge; LCD = Loves Creek, downstream of the discharge and above the
confluence with the Rocky River; RRU=Rocky River,upstream of the confluence with Loves Creek;RRD=Rocky
River,downstream of the confluence with Loves Creek.
2. All monitoring is required to be performed at the above-mentioned monitoring locations.
3. The Permittee shall sample instream Total Hardness, upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream.
Page 7 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (4.) INSTREAM ASSESSMENT OF BIOLOGICAL INTEGRITY (Annual)
[15A NCAC 02B .0200 et seq.]
a. By April 30, 2023 (180 days after the permit effective date), the Permittee shall submit a study plan to
annually assess biological integrity in the receiving water via benthic macroinvertebrate (benthos)
sampling and analysis. The study plan shall include methodologies consistent with DWR-approved
assessment methodologies and propose an annual assessment schedule and sampling location(s). The
study plan shall be submitted to the Division at the address listed under(d.)of this section. Once DWR-
NPDES approves the study plan, it shall be used for all assessments unless a study plan modification is
approved/recommended by the Division. Instream biological integrity assessments shall be conducted by
a laboratory or entity that is NC-certified for the procedure.
b. By November 1,2023(one year from the permit effective date)and November 1 of every subsequent year
until permit expiration,the Permittee shall conduct an instream benthos assessment annually.
c. With each planned assessment, the Pennittee shall provide the Division sufficient notice of sampling so
that Division personnel may attend and share samples collected.
d. The Permittee shall submit instream biological integrity assessment reports within 60 days of completion.
All reports shall include the owner's name, NPDES permit number and Permittee contact person, and
shall be submitted to:
(1) NCDEQ/Division of Water Resources
NPDES Permitting—Municipal Branch
1617 Mail Service Center
Raleigh,NC 27699-1617
(2) NCDEQ/Division of Water Resources
Raleigh Regional Office-WQRO
3800 Barrett Drive
Raleigh,NC 27604
e. If it is determined by the Division that the permitted discharge from the facility is not causing stream
degradation resulting in water quality standards violations,including narrative standards,the Permittee
may request that the instream assessments be terminated.
f. The addition of instream biological integrity assessment requirement does not preclude the Division from
taking any action necessary to resolve any ongoing compliance activity or effluent violations.
Footnote.
1. NC Department of Environmental Quality. 2016. Standard Operating Procedures for the Collection and Analysis
of Benthic Macroinvertebrates. Division of Water Resources.Raleigh,North Carolina.February 2016.
Page 8 of 19

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (5.) CHRONIC TOXICITY PERMIT LIMIT(Quarterly) [15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90% at 4.0 MGD and 6.0 MGD.
The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"(Revised December 2010,or subsequent versions)
or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised December 2010, or
subsequent versions). The tests will be performed during the months of March, June, September, and
December. These months signify the first month of each three-month toxicity testing quarter assigned to the
facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple-concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010,or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally,DWR Form AT-3(original)is to be sent to the
following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be sent to the email,ATForms.ATB( ncdenr.gov.
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating
the facility name,permit number,pipe number,county,and the month/year of the report with the notation of
"No Flow"in the comment area of the form. The report shall be submitted to the Water Sciences Section at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month.Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three-month time interval that begins on the first day of the month in which toxicity testing is
required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified
to include alternate monitoring requirements or limits.
Page 9 of 19

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
P g
survival,minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
Page 10 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (6.) EFFLUENT POLLUTANT SCAN AND SECOND SPECIES TOXICITY TESTING
[G.S. 143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan
must be performed in each of the following years: 2024, 2025, and 2026. Analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in
concentrations greater than applicable standards and criteria. Samples should be collected with one quarterly toxicity
test each year, and must represent seasonal variation [i.e., do not sample in the same quarter every year]. Unless
otherwise indicated,metals shall be analyzed as"total recoverable."
Ammonia(as N) C0610 Trans-1,2-dichloroethylene 34546 Bis(2-chloroethyl)ether 34273
Chlorine(total residual,TRC) 50060 1,1-dichloroethylene 34501 Bis(2-chloroisopropyl)ether 34283
Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis(2-ethylhexyl)phthalate COI00
Nitrate/Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636
Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate 34292
Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581
Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether 34641
Total dissolved solids 70295 Methylene chloride 34423 Chrysene 34320
Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate 39110
Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate 34596
Arsenic 01002 Toluene 34010 Dibenzo(a,h)anthracene 34556
Beryllium 01012 1,1,1-trichloroethane 34506 1,2-dichlorobenzene 34536
Cadmium 01027 1,1,2-trichloroethane 34511 1,3-dichlorobenzene 34566
Chromium C0034 Trichloroethylene 39180 1,4-dichlorobenzene 34571
Copper 01042 Vinyl chloride 39175 3,3-dichlorobenzidine 34631
Lead 01051 Acid-extractable compounds: Diethyl phthalate 34336
Mercury(Method 1631E) COMER P-chloro-m-cresol 34452 Dimethyl phthalate 34341
Nickel 01067 2-chlorophenol 34586 2,4-dinitrotoluene 34611
Selenium 01147 2,4-dichlorophenol 34601 2,6-dinitrotoluene C0626
Silver 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine 34346
Thallium 01059 4,6-dinitro-o-cresol 34657 Fluoranthene C0376
Zinc 01092 2,4-dinitrophenol 34616 Fluorene 34381
Cyanide 00720 2-nitrophenol 34591 Hexachlorobenzene CO700
Total phenolic compounds 32730 4-nitrophenol 34646 Hexachlorobutadiene C0702
Volatile organic compounds: Pentachlorophenol 39032 Hexachlorocyclo-pentadiene 34386
Acrolein 34210 Phenol 34694 Hexachloroethane 34396
1 Acrylonitrile 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403
Benzene 34030 Base-neutral compounds: Isophorone 34408
Bromoform 32104 Acenaphthene 34205 Naphthalene 34696
Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene 34447
Chlorobenzene 34301 Anthracene CO220 N-nitrosodi-n-propylamine 34428
Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine 34438
Chloroethane 85811 Benzo(a)anthracene C0526 N-nitrosodiphenylamine 34433
2-chloroethyl vinyl ether 34576 Benzo(a)pyrene 34247 Phenanthrene 34461
Chloroform 32106 3,4 benzofluoranthene 34230 Pyrene 34469
Dichlorobromomethane 32101 Benzo(ghi)perylene 34521 1,2,4-trichlorobenzene C0551
1,1-dichloroethane 34496 Benzo(k)fluoranthene 34242
1,2-dichloroethane 32103 Bis(2-chloroethoxy)methane 34278
Reporting. Test results shall be reported electronically using the Division's eDMR system or on DWR Form
DMR-PPA-1(or on a form approved by the Director) by December 31st of each designated sampling year. The i
Page 11 of 19

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
Permittee must at least report completion of the test in the eDMR system by entering "1" or "Y" for parameter
code NC01 -Annual Pollutant Scan. If utilizing the DWR Form submit to the following address:
NC DEQ/DWR/NPDES Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Or the form may be uploaded at: https://edocs.deq.nc.gov/Forms/NPDES WW-EDMR-Supplemental-Form
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal
facilities that are subject to the Effluent Pollutant Scan requirements listed above are also subject to additional
toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5). The US EPA requires four(4)
toxicity tests for a test organism other than the test species currently required in this permit. The multiple species
tests should be conducted either quarterly for a 12-month period prior to submittal of the permit renewal
application, or four tests performed at least annually in the four and one half year period prior to the application.
Samples should be collected with one quarterly toxicity test each year, and must represent seasonal variation
[i.e.,do not sample in the same quarter every year].These tests shall be performed for acute or chronic toxicity,
whichever is specified in this permit. The multiple species toxicity test results shall be filed with the Aquatic
Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Or, results can be sent to the email: ATForms.ATBgncdenr.gov.
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional
toxicity tests and reporting requirements. Results should also be summarized in Part E(Toxicity Testing Data)of
EPA Municipal Application Form 2A,when submitting the permit renewal application to the NPDES Permitting
Unit.
Page 12 of 19

DocuSign Envelope ID:BE4B49FO-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (7.) CALCULATION OF TOTAL NITROGEN LOADS [G.S. 143-215.1(b)]
a. The Permittee shall calculate monthly and annual TN Loads as follows:
i. Monthly TN Load(lb/mo)=TN x TMF x 8.34
where:
TN = the average Total Nitrogen concentration (mg/L) of the composite
samples collected during the month;
TMF = the Total Monthly Flow of wastewater discharged during the month
(MG/mo); and
8.34 = conversion factor, from(mg/L x MG)to pounds
i. Annual TN Load(lb/yr)=Sum of the 12 monthly TN Loads for the calendar year.
b. The Permittee shall report monthly Total Nitrogen results (mg/L and lb/mo) in the appropriate discharge
monitoring report for each month and shall report each calendar year's results(lb/yr)with the December report
for that year.
A.(8.) NITROGEN OPTIMIZATION INCLUDING PRETREATMENT PROGRAM UPDATES [G.S.
143-215.1(b)]
Nitrogen Removal Optimization Requirements
a. By January 30, 2023 (90 days after the permit effective date),the Permittee shall:
i. Implement recommendations outlined in the Total Nitrogen Removal Optimization report, submitted
to the Division in November 2020.
ii. Submit a quarterly report to the Division documenting implementation of the optimization report
recommendations and describing expected results. The Permittee shall report any noncompliance
events as required by Standard Conditions(Part II).
iii. This requirement will terminate upon receipt of the Engineer's Certificate of completion for
expansion to 6.0 MGD.
b. Reports shall be submitted to:
NCDENR/DWQ/NPDES Permitting
1617 Mail Service Center
Raleigh,NC 27699-1617
Pretreatment Program Updates [15A NCAC 02H.09001
a. By December 1,2022(30 days after the permit effective date), the Permittee shall:
i. Update and submit for Division approval any draft Industrial User Permit(s) (IUPs) and any future
IUP(s)including nutrient limits to be aligned with the NPDES compliance schedule [See A. (9.)].
ii. Issue the above IUP(s)within 30 days of Division approval.
iii. Issue an IUP to the Town's Water Treatment Plant with TSS, Total Iron and any other applicable
limits to address pass through and interference with the WWTP.
iv. Submit all SIU permit changes as required in Special Conditions for Municipal Facilities Part IV
Section C—Municipal Control of Pollutants from Industrial Users.
Page 13 of 19

DocuSign Envelope ID:BE4B49FO-FGB3-4935-8395-089B8438A007
Permit NC0026441
A. (9.) COMPLIANCE SCHEDULE FOR FACILITY EXPANSION TO 6.0 MGD AND TOTAL
NITROGEN LOAD LIMITATIONS [G.S. 143-215.1(b)]
1. By November 30, 2022, the Permittee shall complete design and submit an Authorization to Construct
(AtC)Permit application to the Division for expansion to 6.0 MGD.
2. By February 1,2023,the Permittee shall submit a report to the Division summarizing actions taken since
the permit effective date through December 2022 toward expansion construction and compliance with the
TN Load limitations.
3. By December 31,2023,the Permittee shall achieve compliance with the interim TN limit of 146,117 lb/yr
(for the 2023 calendar year).
4. By February 1,2024,the Permittee shall submit a report to the Division summarizing actions taken during
the 2023 calendar year toward expansion construction and compliance with the TN Load limitations.
5. By August 31,2024,the Permittee shall complete construction of the third treatment train with a capacity
of 2 MGD.
6. By December 31, 2024,the Permittee shall complete construction of the 6.0 MGD expansion and submit
to the Division an Engineer's Certificate of completion.
7. By December 31, 2024, the Permittee shall achieve compliance with the weighted TN limit of 115,678
lb/yr [combined mass of an eight-month load at 146,117 lb/yr(i.e., 97,411 lb) from 1/1/2024-8/31/2024
and a four-month load at 58,800 lb/yr(i.e., 18,267 lb/yr)from 9/1/2024-12/31/2024].
8. The Permittee shall achieve compliance with the final TN Load limit of 54,800 lb/yr by December 31,
2025 (for the 2025 calendar year).
All reports shall include the owner's name, NPDES permit number and Permittee contact person, and shall be
submitted to:
(1) NCDEQ/Division of Water Resources NPDES (2) NCDEQ/Division of Water Resources
Permitting Raleigh Regional Office
1617 Mail Service Center 3800 Barrett Drive
Raleigh,NC 27699-1617 Raleigh,NC 27604
A. (10.) NUTRIENT REOPENER[G.S. 143-215.1(b)]
In the event that Permittee proposes to accept future industrial process wastewater, including additional
wastewaters from Mountaire Farms, and that wastewater is expected to contain concentrations of Total Nitrogen
(TN)and/or Total Phosphorus(TP)greater than typical domestic wastewater concentration(i.e.greater than 40.0
mg/L TN or greater than 5.0 mg/L TP), the Permittee shall notify the NPDES Municipal Permitting Unit of the
Division at 1617 Mail Service Center,Raleigh,NC 27699 and the Raleigh Regional Office at 3800 Barrett Drive,
Raleigh, NC 27609 within 30 days of knowledge that the Town is considering accepting new industrial process
wastewater containing excess nutrients. The notification shall contain information regarding the proposed
discharge flow, composition, and amenability to treatment at the Siler City WWTP. Changes in effluent
characteristics may require a permit modification, so notification should be at least 180 days prior to the start of
the proposed discharge.
Based on information provided by the Town regarding a potential new industrial process wastewater with high
nutrient concentration, and pursuant to N.C. General Statute Section 143-215.1 and the implementing rules found
in Title 15A of the North Carolina Administrative Code,Subchapter 2H, specifically, 15A NCAC 2H.0112(b)(1)
and 2H.0114(a), and Part II, Conditions B-12 and B-13 of this permit,the Director of DWR may then reopen this
permit to require supplemental nutrient limits for Total Nitrogen and/or Total Phosphorus in accordance with the
current Basin Plan for the Cape Fear River Basin.
Page 14 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-08968438A007
Permit NC0026441
A. (11.) NUTRIENT WATER QUALITY MODELING REOPENER[G.S. 143-215.1(b)]
Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in the North Carolina
Administrative Code at 15A NCAC 2H.0112 (b) (1) and 2H.0114 (a) and Part II sections B-12 and B-13 of this
permit,the Director of DWR may reopen this permit to require supplemental nutrient monitoring of the discharge.
The purpose of the additional monitoring will be to support water quality modeling efforts within the Cape Fear
River Basin and shall be consistent with a monitoring plan developed jointly by the Division and affected
stakeholders. In addition, the results of water quality modeling may require that limits for total nitrogen and total
phosphorus be imposed or modified in this permit upon renewal.
A. (12.) MERCURY MINIMIZATION PLAN(MMP) [G.S. 143-215.1 (b)]
The Permittee shall maintain and continue to implement the Mercury Minimization Plan(MMP)developed in the
previous permit term. The MMP shall continue to be available for inspection on-site. The MMP should place
emphasis on identification of mercury contributors and goals for reduction. Results shall be summarized and
submitted with the next permit renewal.Performance of the MMP will meet the requirements of the TMDL(Total
Maximum Daily Load) for mercury approved by USEPA on October 12, 2012, unless and until a Waste Load
Allocation specific to this facility is developed and this NPDES permit is amended to require further actions to
address the Waste Load Allocation.
A. (13.) 1,4-DIOXANE RE-OPENER[NCGS 143-215.1 (b)]
Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in the North Carolina
Administrative Code at 15A NCAC 2H.0112(b)(1)and 2H.0114(a)and Part II, Sections B-12 and B-13 of this
permit, the Director of DWR may reopen this permit to modify permit requirements to address 1,4-Dioxane
monitoring,treatment and/or compliance upon evaluation of collected monitoring data for potential effluent limits.
A. (14.)PFAS MONITORING REQUIREMENT [G.S. 143-215.1(b.)]
This reporting requirement for the per-and polyfluoroalkyl substances(PFAS)parameters listed under Table 1 of
the Final Method 1633 takes effect the first full calendar quarter following six(6)months after EPA publishes a
40 CFR part 136 Final PFAS Method for wastewater in the Federal Register. Monitoring will be at a quarterly
frequency.
Find the current parameters listed under Table 1 of the August 2021 Draft Method 1633 Analysis of Per- and
Polyfluoroalkyl Substances(PFAS)in Aqueous, Solid,Biosolids,and Tissue Samples by LC-MS/MS at:
https://www.epa.gov/system/files/documents/2021-09/method 1633 draft aug-2021.pdf
Page 15 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
A. (15.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports.
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.)and Section E.(5.)(a)j
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report(eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted
monthly electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data
and submit monthlyDMRs electronicallyusingthe internet. The eDMR system maybe accessed at:
Y
https://deq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access, then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge
monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by
the Director. Duplicate signed copies shall be submitted to the following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section ATTENTION:
Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
See"How to Request a Waiver from Electronic Reporting"section below.
Regardless of the submission method,the first DMR is due on the last day of the month following the issuance
of the permit or in the case of a new facility, on the last day of the month following the commencement of
discharge.
Starting on December 21,2025,the Permittee must electronically report the following compliance monitoring
data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b)Annual Reports.
The permittee may seek an electronic reporting waiver from the Division(see"How to Request a Waiver from
Electronic Reporting" section below).
Page 16 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of each
electronic submission. The Permittee should use the EPA's website resources to identify the initial recipient
for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity(EPA or
the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving
electronic NPDES data[see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type
of electronic submission and for each state. Instructions on how to access and use the appropriate electronic
reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/nati onal-pollutant-discharge-
elimination-system-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
3. How to Request a Waiver from Electronic Reporting
The Permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division.Requests
for temporary electronic reporting waivers must be submitted in writing to the Division for written approval
at least sixty(60)days prior to the date the facility would be required under this permit to begin submitting
monitoring data and reports. The duration of a temporary waiver shall not exceed five (5) years and shall
thereupon expire. At such time,monitoring data and reports shall be submitted electronically to the Division
unless the Permittee re-applies for and is granted a new temporary electronic reporting waiver by the Division.
Approved electronic reporting waivers are not transferrable. Only permittees with an approved reporting
waiver request may submit monitoring data and reports on paper to the Division for the period that the
approved reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B.(11.)(b)and Supersedes Section B. (11.)(d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B. (11.)(a)or by a duly authorized representative of that person as described in Part II,Section B. (11.)(b).A
person, and not a position,must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions,the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR and obtaining an eDMR user account,please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
"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,
Page 17 of 19

DocuSign Envelope ID:BE4B49F0-FCB3-4935-8395-089B8438A007
Permit NC0026441
or those persons directly responsible for gathering the information, the information submitted 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 fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D.(6.)1
The Permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least three(3)years from the date of the report. This
period may be extended by request of the Director at any time [40 CFR 122.41].
Page 18 of 19

0
0
0
c
CO
m
7
co
�'�jf 0
I a "`414: Rocky River Upstream . • A
" Sample Point (RRU) — cc
i \* , . .„,,,
CO
A
CA)p,w`,,,,i,..' Siler City WWTP andco
Co
Outfall 001 Loves Creek Downstream CO
Loves Creek Upstream _,_ �"
Sample Point(LCU) Sample Point(LCD) co
�c CDa..- / co
co
w
. co
- I ��r. •
o
- te, - o
'I� . ,
vp •
O •- ;t
r\
'-'^*� Rocky River Downstream �_. °?.
\\\16_:
- Sample Point (RRD)
TOWN OF SILER CITY WWTP
Facility
NPDES Permit No. NC0026441 Permitted Flow: 4.0/6.0 MGD Location
I not to scale x
Receiving Stream: Loves Creek USGS Quad. E21 NW/Siler City,NC
ro
Stream Classification: C Subbasin: 03-06-12
Chatham
River Basin Cape Fear 8-Digit HUC: 03030003 Latitude: 35'43'45"
N Longitude: 79°25'42" County z
C-)
0
0
N