NC0085359_Draft Permit_20201124

ROY COOPER g' 1St p.742
Governor _�• .
MICHAEL S.REGAN �6
Secretary .dr 00*
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
November 24, 2020
Mr.Andrew Neff,P.E.
Water and Wastewater Division Director
Union County Public Works
4600 Goldmine Road
Monroe,North Carolina 28112
Subject: Draft NPDES Permit Renewal
Permit NC0085359
Twelve Mile Creek WRF
Union County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr.Neff:
renewal Please
with this letter is a copy of the Draft NPDES permit a ewal for your facility.
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:
• As the Division has received a signed Engineer's Certificate indication construction has
been completed under ATC No. 085359A07, the 6.0 MGD flow tier has been removed
from the permit and the facility is under operation at the 7.5 MGD flow tier[See A.(1.)].
• Per the Name/Ownership Change Request received on November 23, 2020, the facility
name has been changed from"Twelve Mile Creek WWTP"to"Twelve Mile Creek WRF."
• Based on the 2012 Statewide Mercury TMDL implementation guidance,Special Condition
A.(9.)Mercury Minimization Plan has been removed from the permit.
• Based on the reasonable potential analysis(RPA) showing reasonable potential to violate
state water quality standards based on a limited data set, quarterly monitoring for total
cadmium has been added to the permit[See A.(1.),A.(.2),and A.(3.)].
• Based on review of instream monitoring data, the Division has removed sampling
requirements at the location "one quarter mile downstream from the outfall, before
confluence with the first tributary" [See A.(1.),A.(.2),and A.(3.)].
• Some of the wording has changed in Special Condition A.(4.), Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• As the Division is moving to accept data electronically through the eDMR system, the
requirement to submit physical nutrient worksheets has been removed from the permit.The
Permittee shall continue to report Monthly Average Total Phosphorous and 12-Month
Mass Average Loading Total Phosphorous via the Division's eDMR system [See Special
Condition A.(5.)]
• To provide verification of the site-specific criteria for copper and silver developed as a
result of the County's 2005/2006 Water Effect Ratio study,Special Condition A.(8.)Water
Effect Ratio Confirmation Study has been added to the permit.
• Special Condition A.(3.)has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed(2022,2023,and 2024). In addition,at the end
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of the Special Condition, 2'species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations[40 CFR 122.21(j)(5)]have been added.As such,Special
• Condition A.(10.) Additional Toxicity Testing Requirements for Municipal Permit
Renewal has been removed from the permit.
• A notation was made concerning the Electronic Reporting Rule—Phase 2 Extension.EPA
has extended the Phase 2 deadline from December 21, 2020, to December 21, 2025 [See
Special Condition A.(7.)]
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A.(1.),A.(.2), and A.(3.)].
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 Union 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.
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 contact me at(919) 707-3609 or by email at [e-mail].
Sincerely,
7)„,
Nick Coco,Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Mooresville Regional Office/Water Quality/Corey Basinger
DWR/Operator Certification Program/Maureen Kinney
DWR/Aquatic Toxicology Branch/Cindy Moore and Zach Thomas
SCDHEC/DWQ/303(d),Modeling&TMDL Manager/Wade Cantrell
Page 2 of 2

Permit NC0085359
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 S 143-21 er lawful standards
and regulations promulgated and adopted by the North C. . . n ironmen agement
Commission,and the Federal Water Pollution Control A . amended,the
Union County P Wor
is hereby authorized to discharge wastewater from a facility . • at the
Twelve Mile Creek Water Reclamation Facilit
y
8299 Kensington Drive
Waxhaw
Union County
to receiving waters designated as Twelve Mile Creek in the Catawba River Basin
in accordance with the effNent limitations,monitorlfrg requirements,and other applicable conditions
set forth in Parts I,II,III,and IV hereof.
This perm -11 become e five Month xx,2020.
This permit an• 'o ' 4 on to discharge shall expire at midnight on December 31,2025.
Signed this day Month xx,2020.
DRAFT
S.Daniel Smith,Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0085359
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 Union County Public Works
is hereby authorized to:
1. Continue to operate and maintain an existing 7.5 MGD wastewa - tment facility consisting of
the following components:
• Influent pump station with stand-by generator
• Self-cleaning influent filter screening structure and m •al b.. screen
• Vortex grit chamber
• Four FAO basins(anoxic and oxidation reactor
• FAO distribution structure
• MISS distribution structure
• Four final clarifiers
• Four tertiary sand filters
• Two ultraviolet light disinfection sys
• Cascade post aeration
• Sludge thickening facility with a gravity - 't s• i.ted polymer storage and feed
system
• Four aerobic digesters wittrdiffused aerati•
• Sodium aluminate storage and feed facilitie ,r phosphorus removal
• Odor control facilities
• Main stand-by power generator
This facility is located at the Twelve Mile Creek Water Reclamation Facility,8299 Kensington Drive,
Waxhaw,Union County,and
2. Up. uance of an Authorization to Construct(ATC)permit by the Division and submission of
the En; -r's Certification for construction completion,operate a wastewater treatment facility up
to a desi; 'w of 9 M ,and
3. Upon issuance of an Authorization to Construct(ATC)permit by the Division and submission of
the Engineer's Certification for construction completion,operate a wastewater treatment facility up
to a design flow of 12 MGD,and
4. Discharge from said treatment works at the location specified on the attached map via Outfall 001
into Twelve Mile Creek,classified C waters in the Catawba River Basin.
Page 2 of 13

Permit NC0085359
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [7.5 MGD]
[15A NCAC 02B .0400 et seq.,15A NCACO2B .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 above
7.5 MGD or permit expiration,whichever comes first,the permittee is authorized to discharge
treated municipal wastewater from Outfall 001. Such discharges shall be limited and monitored)
by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location2
Flow 50050 7.5 MGD Continuous Recording I or E
BOD, 5 day, C0310 5.0 mg/L 7.5 mg/L 2/week4 Composite I and E
(March 1-October 31)
BOD, 5 day, 20°C3 C0310 10.0 mg/L 15.0 mg/L 2/week4 Composite I and E
(November 1- February 28/29)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 ma/L • 2/week4 Composite I and E
NH3 as N C0610 1.0 mg/L 3.0 mg/L 2/week4 Composite E
(March 1-October 31)
NH3 as N C0610 2.0 mg/L 6.0 mg/L 2/week4 Composite E
(November 1-February 28/29)
Fecal Col rm 31616 200/100 mL 400/100 mL 2/week4 Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average >_6.0 mg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab E
Temperature°C 00010 Monitor and Report Daily Grab E
Total Phosphorus RM665 Monthly Average:41.70 pounds/day Weekly Composite E
RA665 12 Month Average:20.85 pounds/day
Total Nitrogen (mg/L) C0600 Monitor and Report Weekly Calculated E
Total Cadmium(pg/L) 01027 Monitor and Report Quarterly Composite E
Chronic Toxicity6 TGP3B Monitor and Report Quarterly Composite E
Pollutant Scan7 NC01 Monitor and Report Footnote 7 Footnote 7 E
Dissolved Oxygen (mg/L) 00300 Monitor and Report Variable2 Grab U and D
Temperature°C 00010 Monitor and Report Variable2 Grab U and D
Footnotes:
1. The permittee shall submit Discharge Mom g Reports electronically using NC DWR's eDMR application system. See Special
Condition A.(7.).
2. Sample locations I-Influent,E-Effluent,U-Upstream=at least 50 feet upstream from the outfall,D-Downstream=at NCSR 1301.
Upstream and downstream samples shall be grab samples collected 3/week during June,July,August,and September and
1/week during the remainder of the year.Additional downstream dissolved oxygen monitoring is recommended to provide DO
stream profile of Twelve Mile Creek in North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
4. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
5. Special Condition A.(5.)describes the methodology for calculation of the monthly average and 12-month limits.
6. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%with testing in February,May,August,and November.See Special Condition
A.(4.).
7. The permittee shall perform three effluent pollution scans during the term of this permit.See Special Condition A.(6.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 13

Permit NC0085359
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [9.0 MGD]
[15A NCAC 02B .0400 et seq.,15A NCACO2B .0500 et seq.]Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification for completion of the expansion to 9.0
MGD and lasting until expansion above 9.0 MGD or permit expiration,whichever comes first, the
Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall
be limited and monitored)by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location z
Flow 50050 9.0 MGD Continuous Recording I or E
BOD, 5 day, 20°C3 C0310 5.0 mg/L 7.5 mg/L 2/week4 Composite I and E
(March 1-October 31)
5 day, 20°C3 C0310 10.0 mg/L 15.0 mg/L 2/week4 Composite I and E
(November 1-February 28/29)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/week4 Composite I and E
NH3 as N C0610 1.0 mg/L 3.0 mg/L 2/week4 Composite E
(March 1-October 31) _
NH3 as N C0610 2.0 mg/L 6.0 mg/L 2/week4 Composite E
(November 1-February 28/29)
Fecal Colifo 31616 200/100 mL 400/100 mL 2/week4 Grab
E
(geometric mean)
Dissolved Oxygen 00300 Daily Average>6.0 mg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab E
Temperature°C 00010 Monitor and Report Daily Grab E
Total Phosphorus RM665 Monthly Average: 41.70 pounds/day Weekly Composite E
RA665 12 Month Average: 20.85 pounds/day
Total Nitrogen (mg/L) C0600 Monitor and Report Weekly Calculated E
Total Cadmium(pg/L) 01027 Monitor and Report Quarterly Composite E
Chronic Toxicity6 TGP3B Monitor and Report Quarterly Composite E
Pollutant Scan7 NC01 Monitor and Report Footnote 7 Footnote 7 E
Dissolved Oxygen (mg/L) 00300 Monitor and Report Variable2 Grab U and D
Temperature°C 00010 Monitor and Report Variable2 Grab U and D
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special
Condition A.(7.).
2. Sample locations I-Influent,E-Effluent,U-Upstream=at least 50 feet upstream from the outfall,D-Downstream=at NCSR 1301.
Upstream and downstream samples shall be grab samples collected 3/week during June,July,August,and September and
1/week during the remainder of the year.Additional downstream dissolved oxygen monitoring is recommended to provide DO
stream profile of Twelve Mile Creek in North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
4. Upon expansion above 7.5 MGD,the County shall revert back to daily sampling of these parameters.After 6 months of daily
sampling,the Permittee may return to twice per week sampling for the parameters for which no permit limit violations have
occurred.Twice per week sampling must occur on any two non-consecutive days during the calendar week.
5. Special Condition A.(5.)describes the methodology for calculation of the monthly average and 12-month limits.
6. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%with testing in February,May,August,and November.See Special Condition
A.(4.).
7. The permittee shall perform three effluent pollution scans during the term of this permit.See Special Condition A.(6.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 13

Permit NC0085359
A.(3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [10.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification for completion of the expansion to 12.0
MGD and lasting until permit expiration, the Permittee is authorized to discharge treated
wastewater from Outfall 001. Such discharges shall be limited and monitored) by the Permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location2
Flow 50050 12.0 MGD Continuous Recording I or E
BOD,5 day, 20°C3 C0310(March 1 October 31) 5.0 mg/L 7.5 mg/L 2/week,, Composite I and E
BOD, 5 day,20°C3 C0310 10.0 mg/L 15.0 mg/L 2/week4 Composite I and E
(November 1-February 28/29)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/week4 Composite I and E
NH3as N C0610 1.0 mg/L 3.0 mg/L 2/week4 Composite
E
(March 1-October 31)
NH3 as N C0610 2.0 mg/L 6.0 mg/L 2/week4 Composite E
(November 1-February 28/29)
Fecal Coliform 31616 200/100 mL 400/100 mL 2/week4 Grab E
(geometric mean) -
Dissolved Oxygen 00300 Daily Average>_6.0 mg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab E
Temperature°C 00010 Monitor and Report Daily Grab E
RM665 Monthly Average: 41.70 pounds/day
Total Phosphoruss RA665 12 Month Average: 20.85 pounds/day Weekly Composite E
Total Nitrogen (mg/L) C0600 Monitor and Report Weekly Calculated E
Total Cadmium(pg/L) 01027 Monitor and Report Quarterly Composite E
Chronic Toxicity6 TGP3B Monitor and Report Quarterly Composite E
Pollutant Scan' NC01 Monitor and Report Footnote 7 Footnote 7 E
Dissolved Oxygen (mg/L) 00300 Monitor and Report Variable2 Grab U and D
Temperature°C 00010 Monitor and Report Variable2 Grab U and D
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special
Condition A.(7.).
2. Sample locations I-Influent,E-Effluent,U-Upstream=at least 50 feet upstream from the outfall,D-Downstream=at NCSR 1301.
Upstream and downstream samples shall be grab samples collected 3/week during June,July,August,and September and
1/week during the remainder of the year.Additional downstream dissolved oxygen monitoring is recommended to provide DO
stream profile of Twelve Mile Creek in North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
4. Upon expansion above 9.0 MGD,the County shall revert back to daily sampling of these parameters.After 6 months of daily
sampling,the Permittee may return to twice per week sampling for the parameters for which no permit limit violations have
occurred.Twice per week sampling must occur on any two non-consecutive days during the calendar week.
5. Special Condition A.(5.)describes the methodology for calculation of the monthly average and 12-month limits.
6. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%with testing in February,May,August,and November.See Special Condition
A.(4.).
7. The permittee shall perform three effluent pollution scans during the term of this permit.See Special Condition A.(6.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 5 of 13

Permit NC0085359
A.(4.) CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY)
[15A NCAC 02B.0200]
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 7.5 MGD,9.0 MGD and 12.0
MGD flow.
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
February,May,August,and November.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 ailure 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 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: dr
Attention: North Callplina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be s t t 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,inclykle all supporting chemical/physical measurements and all
concentration/response data,and be certified by laboratory supervisor and ORC or approved
d ate signature. Total residual chlorine of the effluent toxicity sample must be measured and
repor hlorine is employed for disinfection of the waste stream.
Should th no discharge of flow from the facility during a month in which toxicity monitoring is
required,the rmittee 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.
Page 6 of 13

Permit NC0085359
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.
A.(5.) TOTAL PHOSPHOROUS (TP) MONITORING
[G.S.143-215.1(b)]
The Permittee shall calculate a 12-month rolling average mass loading as the s"' monthly loadings,
according to the following equations:
(1) Monthly Average(pounds/day)=TP x Qw x 8
Where:
TP=the arithmetic average of total phosphorus concentrations /L)obtained via composite samples
(either daily,weekly,or monthly average values)collected during the month
Qw=the average daily waste flow(MGD)for the month
8.34=conversion factor,from(mg/L x MGD) to pound
The 12-month rolling average mass loading is defined as the s 'of the monthly average loadings for
the previous 12 months inclusive of the reportin onth:
TPma+12
(2) 12-Month Average Mass Loading(pounds/da 1 (inclusive of reporting month)
Where:
TPma is defined as the total phosphorus monthly average mass loading(calculated above).
y average and 12-month erage mass loadings shall be reported electronically using the
Divisi. . D MR system for Twelve Mile Creek WWTP.
The Permittee repor ., e IT concentration for each sample electronically using the Division's
eDMR system. ' . of and compliance with the TP limit shall be done on a monthly basis.
Page 7 of 13

Permit NC0085359
A.(6.) EFFLUENT POLLUTANT SCAN(Municipal POTWs)
[G.S.143-215.1(b)]
a. 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:2022,2023,and 2024.
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 tes each year,and must
represent seasonal variation[i.e.,do not sample in the same quarter e ear]. Unless
otherwise indicated,metals shall be analyzed as"total recoverable."
Ammonia(as N) C0610 Trans-1,2-dichloroethylene 34546 oroethyl)ether 34273
Chlorine(total residual,TRC) 50060 1,1-dichloroethylene 34 I B • oroisopropyl)ether 34283
Dissolved oxygen 00300 1,2-dichloropropane CS Bis( ••xyl)phthalate CO100
Nitrate/Nitrite 00630 1,3-dichloropropylene •
4-bromo. .henyl ether 34636
Kjeldahl nitrogen 00625 Ethylbenzene •3 Butyl benzy •to 34292
Oil and grease 00556 Methyl bromide 34413 2-chloronaph 34581
Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl p - . er 34641
Total dissolved solids 70295 Methylene chlorid 34423 11 sene 34320
Hardness 00900 1,1,2,2-tetrachloroethane . '• v n-butyl phthalate 39110
Antimony 01097 Tetrachloroethylene •
Di-n-octyl phthalate 34596
Arsenic 01002 Toluene Dibenzo(a,h)anthracene 34556
Beryllium 01012 1,1,1 •roethane • I: 1,2-dichlorobenzene 34536
Cadmium 01027 1,1,2-. - e 34511 orobenzene 34566
Chromium C0034 Trichlo , y ' - 39180 .ichlorobenzene 34571
Copper 01042 Vinyl chl. •e ' 11F,39175 3,3-dichlorobenzidine 34631
Lead 01051 Acid-extra• ble con ••unds: Diethyl phthalate 34336
Mercury(Method 1631E) ••,•ia• P-chloro-m -.•l Dimethyl phthalate 34341
Nickel 2-chlorophenol 586 2,4-dinitrotoluene 34611
Selenium 0114 2,4-dichlorophe 34601 2,6-dinitrotoluene C0626
Silver 01077 2,4-dimethylphe 34606 1,2-diphenylhydrazine 34346
Thallium 01059 4,6-dinitro-o-creso 34657 Fluoranthene C0376
Zinc I i• , 2,4-dinitrophenol 34616 Fluorene 34381
Cyanide -.P.I 2-nitrophenol 34591 Hexachlorobenzene C0700
Total phenolic compounds 4-nitrophenol 34646 Hexachlorobutadiene C0702
Volatile organic compounds: Pentachlorophenol 39032 Hexachlorocydo-pentadiene 34386
Acrolein 34210 •4 ••.1 34694 Hexachloroethane 34396
Acrylonitrile WIJI 34215 '6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403
Benzene 34030 :•se-neutral compounds: Isophorone 34408
Bromoform 32104 Acenaphthene 34205 Naphthalene 34696
Carbon tetrachloride . 32102 Acenaphthylene 34200 Nitrobenzene 34447
Chlorobenzene 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 P 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
b. 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.
Page 8 of 13

Permit NC0085359
c. 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
Atk
d. 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 o er than the test
species currently required in this permit. The multiple species tests shoul• •nducted either
quarterly for a 12-month period prior to submittal of the permit renewal app i 'eon,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` ecified in tljis permit. The
multiple species toxicity test results shall be filed with the Aquatic Toxicology Branch at the
following address:
North Carolina Div' • of Water Resources
Water Sciences Secti. - •'c Toxicology Bran
1621 Mail Service Cen
Raleigh,North Carolina '7699- ;
Or,results can be seriillt
f' email,ATFo .ATB@nc• -nr.gov.
Contact the Division's Aquatic Toxicology ..ranch at 919-743-8401 for guidance on conducting
the additional toxicity tests and reporting requiinents. 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.
A.(7.) RONIC REP TING OF MONITORING REPORTS
[ 143-215.1(b)]
Federal regulations r ire 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
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Permit NC0085359
1. Reporting Requirements(Supersedes Section D. (2.)and Section E. (5.) (a)]
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 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 Ike 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. _uplicate 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 Electric Reporting" section below.
Regardless of the submissiori'ntethod,the fir MR is dueon the last day of the month following
the issuance of the permit or in the case of a n facility,on the last day of the month following the
commencement of discharge. la
or
Starting on December 21,2025,the permittee must electronically report the following compliance
monitorin data and reports,when applicable:
• er Overflo pass 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 Smissions
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)].
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Permit NC0085359
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/2015/10/22/2015-249541national-pollutant-
discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting R uirements" 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 r- : g waiver request to
the Division. Requests for temporary electronic reporting waivers must be 4 itted in writing to
the Division for written approval at least sixty(60)da prior to the date the . would be
required under this permit to begin submitting mo •' ring data d reports. Th- on of a
temporary waiver shall not exceed 5 years and s upon e e. At such :I monitoring
data and reports shall be submitted electronically to th Division s the perm •ee 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:
o
http://deq.nc.gov/ ut/di /water-reurces/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b)and Supersedes Section B. (11.)
(d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II,Section B. (11)(4 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
re.orting purposes.
For e I ' 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. age:
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 ACCEYI'ED:
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Permit NC0085359
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information 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, ' •ing eDMR
submissions. These records or copies shall be maintained for a perio• at 1-. t 3 years from the
date of the report. This period may be extended by request of the ' tor at any time [40 CFR
122.41].
A.(8.) WATER EFFECT RATIO CONFIRMATION STUDY
[G.S.143-215.1(b)]
a. During the period beginning on the effective date of the permit and prior to the pansion above
7.5 MGD or permit expiration,whichever comes first,the permittee shall conduct a confirmatory
Water Effect Ratio study to verify copper and silver site-specific criteria.
b. The Permittee shall conduct a confirmatory Water Effect Ratio study to verify copper and silver
site-specific criteria with each NPDES permit renewabThe WER study plan shall be submitted to
the Division for approval prior to the stud bei2 conducted.The study results shall be submitted
to the Division for appr
c. The WER study plan and results reports shall include the owner's name,NPDES permit number
and permittee contact person,and shall be submit*d to:
NCDEQ/ Division of Watt Resources
NPDES Municipal Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
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Permit NC0085359
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