NC0021211_Draft Permit_20220113

DocuSign Envelope ID:CA7A20F8-1183-4407-85179-44DDB9CCOBEA
°*0STitTE\
/ROY COOPER , i
Governor qt
Ir
ELIZABETH S.BISER
Secretary *ft ` '*
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
January 13, 2022
Tonya A. Mann, Utilities Director
City of Graham
Graham WWTP
P.O. Drawer 357
Graham,North Carolina 27253
Subject: Draft NPDES Permit Renewal
Permit NC0021211
Graham WWTP
Alamance County
Grade IV Biological WPCS
SIC Code 4952
Dear Ms. Mann:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• The topographic map was updated to show instream monitoring locations.
• Regulatory citations have been added to the permit.
• Based on the City's request to modify the permit to authorize a plant expansion to 5.0 MGD,
review and approval of the submitted Engineering Report/Environmental Information
Document for the proposed expansion, an Effluent Limits and Monitoring Requirements
sheet for 5.0 MGD has been added to the permit [See A. (2.)].
• Instream monitoring parameters have been split into a separate section [See A. (3.)].
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
sheet [See A. (1.) and A. (2.)], Instream Monitoring Requirements [See A. (3.)] and the
Effluent Pollutant Scan [See A. (4.)] sections.
• A footnote has been added to specify that 2/week sampling shall not occur on two
consecutive days [See A. (1.), Footnote 3].
• Based on the implementation of nutrient(TN and TP) load limits,their effective dates have
been removed from the permit [See A. (1.)].
• Based on the implementation of nutrient (TN and TP) load limits, the Nitrogen
Optimization special condition has been removed from the permit.
D Q NorthNorth Carolina DepartmentSalisburyStreet of1617 Environmental
MailServiceCenter Quality I Division
Raleigh, of WaterNorthCaro Resoulina27 rces
512 699 1617
...e.—.
NORT I CAROLINA
+d Enviramental Clualltv /'� 919.707.9000

DocuSign Envelope ID:GA7A20F8-1183-4407-85D9-44DDB9CCOBEA
• 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.)].
• 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.)].
• Based on Mercury TMDL evaluation showing mercury values reported at levels > 1 ng/L
and since the permitted flow is greater than 2 MGD, the Mercury Minimization Plan
(MMP) special condition is retained in the permit with wording modified to continue and
maintain the MMP [See A. (9.)].
• Based on DWR Instream Conductivity Monitoring Guidance, since the facility has a
pretreatment program with Significant Industrial Users (SIUs), instream (upstream and
downstream) effluent monitoring for Conductivity has been added to the permit [See
Section A. (1.)].
• Wording in Special Conditions A. (4.) Chronic Toxicity Permit Limit,and A. (5.)Effluent
Pollutant Scan have been updated to allow for electronic submittal. Please review each
special condition carefully.
• Special Condition A. (5.) — Effluent Pollutant Scan has been modified to include the
specific three years in which the Effluent Pollutant Scans shall be performed (2023, 2024,
and 2025). In addition, at the end of the Special Condition, 2'd species Toxicity Testing
Requirements for municipal permit renewals per Federal Regulations [40 CFR
122.21(j)(5)] have been added.
• A permit reopener special condition has been added to modify 1,4-Dioxane monitoring,
treatment and/or compliance [See A. (10.)].
• A special condition to monitor effluent PFAS chemicals 2/year has been added to the
permit,to be effective six(6)months after EPA has a final wastewater method in 40
CFR136 method published in the Federal Register.
• 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)
interne application has been added to your NPDES permit [See A. (9.)].
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.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Alamance County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR, NPDES
Permitting Branch, 1617 Mail Service Center,Raleigh,NC 27699-1617 no later than 30 days after
receipt of this draft permit.
Q NorthNorth CarolinaSalis DeburypartmentStreet1 of
16 Environmental
17MailService Quality I Division of Water Resources
512 Center I Raleigh,North Carolina 27699-1617
NOR1H CAROLINAD
Depatiment m Emkonavental Wahl, 919.707.9000

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Following the 30-day public comment period, the Division will review all pertinent
comments and take appropriate action prior to issuing a final permit. If you have questions
concerning this draft permit, please call me at (919) 807-6385 or by email at
[e-mail].
Sincerely,
DocuSigned by.
g�2[ { uftu
5...
Gary Perlmutter, Environmental Specialist II -
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR/Wastewater Operator Certification Group/Maureen Kinney
DWR/WSS/Aquatic Toxicology Branch/Zachary Thomas and Cindy Moore
DWR/WSS /Ecosystems Branch/Mark Vander Borgh
DWR/Winston-Salem Regional Office/Water Quality Operations/Lon Snider
DWR/Winston-Salem Regional Office/Public Water Supply/Eric Hudson
DWR/NPDES Industrial Permitting/Min Xiao
DWI/Trupti Desai
North Carolina Department of Environmental Quality Division of Water Resources
D_E
Q 512 North Salisbury Street 11617 Mail Service Center ( Raleigh,North Carolina 27699-1617
NORTH cAR4UrA
o.o.ft..ld rumnWa.;\ oe.° 919.707.9000

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DD139CG0BEA
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
City of Graham
is hereby authorized to discharge wastewater from a facility located at the
Graham WWTP
1204 East Gilbreath Street
Graham,NC 27253
Alamance County
to receiving waters designated as Haw River 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 Month 1, 2022.
This permit and authorization to discharge shall expire at midnight on May 31, 2026.
Signed this day Month xx, 2022.
DRAFT
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
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 City of Graham is hereby authorized to:
1. Continue to operate an existing 3.5 MGD wastewater treatment system consisting of the
following:
• Mechanical bar screen
• Grit collection
• Two primary clarifiers
• Two aeration basins t,
• Three digesters
• Chlorination
• Four final clarifiers
• De-chlorination
• Sand filters
• Final (post) aeration
• Lime stabilization
• Rotary drum sludge thickener
• Sludge storage
The facility is located at the Graham Wastewater Treatment Plant, 1204 East Gilbreath Street,
Graham, in Alamance County;
2. After receiving an Authorization to Construct and from the Division, construct a 5.0 MGD
wastewater treatment system; and after the Division receives the Engineer Certification of
construction completion,operate above system.
3. Discharge from said treatment works at the location specified on the attached map into Haw
River, classified WS-V;NSW waters in the Cape Fear River Basin.
Page 2 of 19

Docuslgn Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (3.5 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 expansion to 5.0 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 1 by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location
Flow 50050 3.5 MGD Continuous RecordingInfluent or
Effluent
Total Monthly Flow 82220 Monitor and Report Monthly Recording Influent or
(MG/mo) or Calculated Effluent
BOD,5-day,20°C 2 12.0 mg/L 18.0 mg/L 2/week 3 Composite Influent and
April 1 — October 31 C0310 Effluent
BOD,5-day,20°C 2 24.0 mg/L 36.0 mg/L 2/week 3 Composite Influent and
November 1 —March 31 Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/week 3 Composite
Influent and
(TSS)2 g g p Effluent
Ammonia(NH3 as N) 4.0 mg/L 12.0 mg/L 2/week 3 Composite Effluent
April 1 — October 31
C0610
Ammonia(NH3 as N) 8.0 mg/L 24.0 mg/L 2/week 3 Composite Effluent
November 1 — March 31
Dissolved Oxygen(DO) 00300 Daily Average>_5.0 mg/L Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL 2/week 3 Grab Effluent
(geometric mean)
Total Residual Chlorine 50050 28.0 /L DailyGrab Effluent
(TRC)4 µg
Conductivity(pmhos/cm) 00094 Monitor and Report Daily Grab Effluent
TKN(mg/L)5 00625 Monitor and Report Weekly Composite Effluent
NO2-N+NO3-N(mg/L)5 00630 Monitor and Report Weekly Composite Effluent
Total Nitrogen(TN)(mg/L)5 C0600 Monitor and Report Weekly Calculated Effluent
TN Load 5,7 QM600 Monitor and Report(lb/mo) Monthly Calculated Effluent
QY600 56,315 lb/yr Annually
Total Phosphorus(TP) C0665 Monitor and Report Weekly Composite Effluent
(mg/L)
TP Load 5, QM665 Monitor and Report(Ib/mo) Monthly Calculated Effluent
QM665 7,079 lb/yr Annually
Page 3 of 19

DocuSign Envelope ID:CA7A20F8-1183-4407-85139-44DDB9CCOBEA
Permit NC0021211
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location 2
Total Hardness(as CaCO3) 00900 Monitor and Report Quarterly Grab Effluent
(mg/L)8
1,4-Dioxane 9 82388 Monitor and Report Monthly Grab Effluent
Chronic Toxicity 10 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 11 Footnote 11 Effluent
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system. See A.(11.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15%of the respective influent value(85%
removal).
3. Sampling 2/week must occur on any two non-consecutive days during the calendar week.
4. 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.
5. TKN is Total Kjeldahl Nitrogen;NO3-N and NO2-N are Nitrate and Nitrite Nitrogen,respectively.TN=TKN+NO2-N
+NO3-N.
6. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of time. See A. (8.),
Calculation of Total Nitrogen or Total Phosphorus Loads.
7. Compliance with mass limits shall be determined in accordance with A. (6.)Nutrient Allocations, and A. (7.) Annual
Limits for Total Nitrogen or Total Phosphorus.
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 an appropriate 40 CFR Part 136 method.
10. Whole Effluent Toxicity will be monitored using the Pass/Fail Ceriodaphnia dubia at 14% effluent. Samples shall be
taken in March, June, September and December. See A.(4.).
11. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See A.(5.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 19

DocuSign Envelope ID:CA7A2OFB-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (5.0 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 5.0 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 I by
the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location
Flow 50050 5.0 MGD Continuous RecordingInfluent or
Effluent
Total Monthly Flow 82220 Monitor and Report Monthly Recording Influent or
(MG/mo) or Calculated Effluent
BOD,5-day,20°C 2 8.4 mg/L 12.6 mg/L Daily Composite Influent and
April 1 — October 31 C0310 Effluent
BOD,5-day,20°C 2 16.8 mg/L 25.2 mg/L Daily Composite Influent and
November 1 — March 31 Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L Daily Composite Influent and
(TSS) Effluent
Ammonia(NH3 as N) 2.8 mg/L 8.4 mg/L Daily Composite Effluent
April 1 — October 31 C0610
Ammonia(NH3 as N) 5.6 mg/L 16.8 mg/L Daily Composite Effluent
November 1 — March 31
Dissolved Oxygen(DO) 00300 Daily Average>_5.0 mg/L Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab Effluent
(geometric mean)
Total
(TRC)Residual Chlorine 50050 28.0 µg/L Daily Grab Effluent
Conductivity(pmhos/cm) 00094 Monitor and Report Daily Grab Effluent
TKN(mg/L)4 00625 Monitor and Report Weekly Composite Effluent
NO2-N+NO3-N(mg/L)4 00630 Monitor and Report Weekly Composite Effluent
Total Nitrogen(TN)(mg/L)4 C0600 Monitor and Report Weekly Calculated Effluent
TN Load 5,s QM600 Monitor and Report(lb/mo) Monthly Calculated Effluent
QY600 56,315 lb/yr Annually
Total Phosphorus(TP) C0665 Monitor and Report Weekly Composite Effluent
(mg/L)
TP Load 5,s QM665 Monitor and Report(lb/mo) Monthly Calculated Effluent
QM665 7,079 lb/yr Annually
Page 5 of 19

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location 2
Total Hardness(as CaCO3) 00900 Monitor and Report Quarterly Grab Effluent
1,4-Dioxane8 82388 Monitor and Report Monthly Grab Effluent
Chronic Toxicity 9 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 10 Footnote 10 Effluent
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system. See A.(11.).
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. TKN is Total Kjeldahl Nitrogen;NO3-N and NO2-N are Nitrate and Nitrite Nitrogen,respectively. TN=TKN+NO2-N
+NO3-N.
5. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of time. See A. (8.),
Calculation of Total Nitrogen or Total Phosphorus Loads.
6. Compliance with mass limits shall be determined in accordance with A. (6.)Nutrient Allocations, and A. (7.)Annual
Limits for Total Nitrogen or Total Phosphorus.
7. Effluent Total Hardness sampling should be performed in conjunction with testing for hardness-dependent metals
(cadmium,copper,lead,nickel,silver,and zinc).
8. Samples must be reported to a minimum of PQL< 1 µg/L using an appropriate 40 CFR Part 136 method.
9. Whole Effluent Toxicity will be monitored using the Pass/Fail Ceriodaphnia dubia at 19% effluent. Samples shall be
taken in March, June, September and December. See A. (4.).
10. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See A.(5.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
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DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
A.(3.) INSTREAM MONITORING REQUIREMENTS [15A NCAC 02B .0200]
INSTREAM CHARACTERISTIC
MEASUREMENT FREQUENCY SAMPLE TYPE SAMPLE LOCATION 1
Parameter Code
June-September 3/week Upstream,
Dissolved Oxygen(DO),mg/L 00300 Grab
October-May 1/week Downstream
Tem erature °C 00010 June-September 3/week Grab Upstream,
p ( ) October-May 1/week Downstream
June-September 3/week Upstream,
Conductivity(pmhos/cm)2 00094 Grab Downstream
October-May 1/week
Total Hardness(as CaCO3), 00900 1/quarter Grab U
mg/L2 q
Footnotes:
1. Upstream is at Highway 54; Downstream is at NCSR 2158. Instream monitoring for DO, Temperature and
Conductivity is provisionally waived in light of the Permittee's participation in the Upper Cape Fear River Basin
Association (UCFRBA). Instream monitoring shall be immediately reinstated and the Division shall be notified
immediately should the Permittee end its participation in the UCFRBA.
2. The Permittee shall sample instream 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:CA7A20F8-1183-4407-85139-44DDB9CCOBEA
Permit NC0021211
A. (4.) 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 14% at 3.5 MGD and 19% at 5.0
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, [e-mail].
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.
Page 8of19

DocuSign Envelope ID:GA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
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.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism 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 9 of 19

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
A. (5.) EFFLUENT POLLUTANT SCAN [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: 2023,2024,and 2025.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 CO100
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 1631 E) 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 C0700
Total phenolic compounds 32730 4-nitrophenol 34646 Hexachlorobutadiene C0702
Volatile organic compounds: Pentachlorophenol 39032 Hexachlorocyclo-pentadiene 34386
Acrolein 34210 Phenol 34694 Hexachloroethane 34396
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
Page 10 of 19

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
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 31' of each designated
sampling year. The 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. 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.ATBga,ncdenr.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.
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DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
A. (6.) NUTRIENT ALLOCATIONS [15A NCAC 02B .0270]
a. The following tables list the Total Nitrogen (TN) and Total Phosphorus (TP) allocations and offset
credits(if any)assigned to, acquired by,or transferred to the Permittee in accordance with the Jordan
Lake nutrient management rule(15A NCAC 02B .0270)and the status of each as of permit issuance.
The allocations are not enforceable limits nor do they supersede any TN or TP limit established
elsewhere in this permit or in the NPDES permit of a compliance association of which the Permittee
is a Co-Permittee Member.
Total Nitrogen Allocation
ALLOCATION ALLOCATION AMOUNT'
TYPE SOURCE DATE STATUS
Delivered(Ib/yr) Discharge(Ib/yr)
Base Assigned by Rule 8/11/09 45,615 56,315 Active
(T15A NCAC 02B.0270)
TOTAL 45,615 56,315 Active
Footnote:
1. Nitrogen Transport Factor=66%
Total Phosphorus Allocation
ALLOCATION ALLOCATION AMOUNT'
TYPE SOURCE DATE STATUS
Delivered(lb/yr) Discharge(Ib/yr)
Base Assigned by Rule 8/11/09 5,026 7,079 Active
(T15A NCAC 02B.0270)
TOTAL 5,026 7,079 Active
Footnote:
1. Phosphorus Transport Factor=56%
b. Any addition, deletion,or modification of the listed allocation(s)(other than to correct typographical
errors)or any change in status of any of the listed allocations shall be considered a major modification
of this permit and shall be subject to the public review process afforded such modifications under
state and federal rules.
•
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DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
A. (7.) ANNUAL LIMITS FOR TOTAL NITROGEN OR TOTAL PHOSPHORUS
[15A NCAC 02B .0270]
a. Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES dischargers
in the Jordan Lake watershed are annual limits and apply on a calendar year basis.
b. For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP) Load
limit in this Permit if:
i. the Permittee's annual TN(or TP) Load is less than or equal to the effective limit, or
ii. the Permittee is a Co-Permittee Member of a compliance association.
c. If the Permittee is not a co-permittee member of a compliance association and the Permittee's
cumulative annual TN (or TP) discharge exceeds the effective TN (or TP) Load Limit in this permit
at any point during the calendar year, the Permittee is in violation of its TN (or TP) Load limit for
the remaining days of that year,and each day of such continuing violation shall constitute a separate
violation.
d. The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in the
Permittee's allocations.
i. Allowable changes include those resulting from purchase of TN (or TP) allocation from an
authorized mitigation banker,the Ecosystem Enhancement Program,or other source allowed
under applicable regulations; purchase, sale, trade, or lease of allocation between the
Permittee and other dischargers; regionalization; and other transactions approved by the
Division.
ii. The Permittee may request a modification of the TN (or TP) Load limit in this Permit to
reflect allowable changes in its allocation(s).
A. Upon receipt of timely and proper application,the Division will modify the permit
as appropriate and in accordance with state and federal program requirements.
B. Changes in TN (or TP) limits become effective on January 1 of the year following
permit modification. The Division must receive application no later than August 31
for changes proposed for the following calendar year.
iii. Any requests for modification should be sent to:
NC DEQ/DWR/NPDES Programs
Attn: Jordan Lake Watershed Coordinator
1617 Mail Service Center
Raleigh,NC 27699-1617
e. If the Permittee is a member and co-permittee of an approved compliance association on January 1
of a given year, its TN and TP discharges during that year are governed by that association's group
NPDES permit and the limits therein.
i. The Permittee shall be considered a Co-Permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
ii. Association roster(s) and members' TN and TP allocations will be updated annually and in
accordance with state and federal program requirements.
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Docuslgn Envelope ID:GA7A20F8-1183-4407-85D9-44DDu9GCOBEA
Permit NC0021211
iii. If the Permittee intends to join or leave a compliance association, the Division must be
notified of the proposed action in accordance with the procedures defined in the association's
NPDES permit.
A. Upon receipt of timely and proper notification,the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
B. Membership changes in a compliance association become effective on January 1 of
the year following modification of the association's permit.
f. The TN and TP monitoring and reporting requirements in this Permit remain in effect throughout the
term of the Permit and are not affected by the Permittee's membership in a compliance association.
A. (8.) CALCULATION OF TOTAL NITROGEN AND TOTAL PHOSPHORUS LOADS
[15A NCAC 02B .0270]
a. The Permittee shall calculate monthly and annual TN and TP Loads as follows:
i. Monthly TN(or TP)Load(lb/mo)=TN(or TP) x TMF x 8.34
where:
TN or TP = the average Total Nitrogen or Total Phosphorus 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
ii. Annual TN(or TP) Load(Ib/yr)=Sum of the 12 monthly TN(or TP)Loads for the calendar year.
b. The Permittee shall report monthly Total Nitrogen and Total Phosphorus 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. (9.) 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.
Page 14 of 19

DocuSign Envelope ID:GA7A20F8-1183-4407-85D9-44DDB9000BEA
Permit NC0021211
A. (10.) 1,4-DIOXANE RE-OPENER [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 modify permit requirements
to address 1,4-Dioxane monitoring, treatment and/or compliance upon evaluation of collected
monitoring data for potential effluent limits.
A. (11.) 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)1
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 electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit monthly DMRs electronically using the internet.The eDMR system may
be accessed at: 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
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Docusign Envelope ID:GA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC002121 1
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).
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/national-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
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DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
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)J
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 certi, 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 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 17 of 19

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC002 1211
A. (12.) 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 frequency of 2/year.
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 18 of 19

DocuSign Envelope ID:CA7A20F8-1183-4407-85D9-44DDB9CCOBEA
Permit NC0021211
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