NC0021491_Draft Permit_20221018

ROY COOPER _
Governor
ELIZABETH S.BISER
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
Qctober 18, 2022 ,
Town of Mocksville
Attn: Mr. Kenneth Gamble, Town Manager
171 S. Clement Street
Mocksville,North Carolina 27028
Email: kgamble(amocksvillenc.gov
Subject: Draft NPDES Permit Renewal
Permit NC0021491, 0.98 MGD
Dutchman WWTP
Davie County
Grade III Biological WPCS
SIC Code 4952
Dear Permittee:
Enclosed with this letter is a copy of the Draft NPDES permit renewal of the subject permit for the
Dutchman WWTP. Please review this draft carefully to ensure a thorough understanding of the
requirements and conditions it contains. There are several changes to the existing permit,including
the following:
• The facility's components list has been updated.
• Monitoring frequency for total residual chlorine (TRC)has been revised to reflect a
Grade III facility. Monitoring frequency changed from twice to three times a week [See
Section A. (1.)].
• To monitor the influence of the discharge on the receiving stream and in accordance with
15A NCAC 02B .0508, instream monitoring requirements for conductivity have been
added to the permit [See Section A. (1.)].
• 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 to calculate permit limitations. Therefore,
effluent hardness and instream hardness sampling upstream of the discharge, have been
added to the permit at a monitoring frequency of quarterly [See Section A. (1.)].
• Per the 2016 revisions to State water quality standards, the requirement for effluent and
upstream hardness sampling has been revised [See Footnotes 5 and 6 in Section A. (1.)]
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standard for zinc, the monitoring requirement for zinc has been
removed from the permit [See Section A. (1.)].
• Based on the RPA continuing to show reasonable potential to violate state water quality
standard for cadmium, cadmium limits have been updated in the permit. Limitations
became more stringent. [See Section A. (1.)].
• Based on the RPA showing reasonable potential to violate state water quality standard for
copper, copper limits have been added to the permit [See Section A. (1.)].

To provide an opportunity for the Town to develop a plan to assess sources of copper to
come in compliance with the limit in Section A. (1.), a 3-year schedule of compliance has
been added to the permit [See Special Condition A. (8.) Schedule of Compliance for
Copper Limitations (with option for WER Study)].
• Based on the presence of a downstream Water Supply, Special Condition A. (6.)to monitor
effluent PFAS chemicals quarterly has been added to the permit [See Section A. (1.)] to be
effective six (6) months after EPA has a final wastewater method in 40 CFR 136 method
published in the Federal Register.
• Based on the presence of a downstream Water Supply, a requirement to monitor effluent
1,4-Dioxane quarterly has been added to the permit [See Section A. (l.)]
• A permit reopener special condition has been added to modify 1,4-Dioxane monitoring,
treatment and/or compliance [See Special Condition A. (7.)].
• Some of the wording has changed in Special Condition A. (3.). The specific three years in
which the Effluent Pollutant Scan shall be performed (2024, 2025, and 2026)were added.
Please review each paragraph carefully.
• Some of the wording has changed in Special Condition A. (4.). 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. Also, Federal
regulations require the 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. Please review each paragraph
carefully.
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A. (1.)].
• Regulatory citations have been added to the permit.
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 Davie 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 [phone] or by email at diana.yitbarek(cancdenr.gov.
Sincerely,
Diana Yi arek, Engineer
NPDES Municipal Permitting Unit
Page 2 of 3
i I

Hardcopy: NPDES Files
Ecopy: US EPA Region 4
WWTP's ORC/Dennis W. Murdock
Envirolink Inc./C. White and Madelyn Mills
DWR/Municipal Permitting Unit—Pretreatment(PT)/Keyes McGee
DWR/Winston Salem Regional Office/Pretreatment/Tricia Lowery
DWR/Winston Salem Regional Office/Lon Snider and Jenny Graznak
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Basin Planning/Nora Deamer
DWR/Aquatic Toxicology Branch/Cindy Moore
Page 3 of 3

Permit NC0021491
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
DRAFT 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 Mocksville
is hereby authorized to discharge wastewater from a facility located at the
Dutchman Creek Wastewater Treatment Plant
295 Garwood Road, Mocksville,NC
Davie County
to receiving waters designated as Dutchman Creek in the Yadkin-Pee Dee River Basin in accordance with
effluent limitations,monitoring requirements,and other conditions set forth in Parts I,II,III,and IV hereof.
The permit shall become effective Month 1, 2022.
This permit and the authorization to discharge shall expire at midnight on June 30,2027.
Signed this day Month xx,2022.
DRAFT
Richard E. Rogers,Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 12

Permit NC0021491
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 Mocksville is hereby authorized to:
1. Continue to operate the existing 0.98 MGD wastewater treatment system that includes the
following components:
• Influent pump station
• Flow splitter box
• Flume
• Three (3)aeration basins
• Two(2)clarifiers
• Chlorine contact chamber
• RAS/WAS pump station
• Aerobic digester
• Chlorine building
• Chemical building
• Sludge thickener
• Blowers
• Emergency generator
2. Discharge from said treatment works at the location specified on the attached map into
Dutchman Creek,classified C waters in the Yadkin-Pee Dee River Basin.
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Permit NC0021491
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq.,15A NCAC 02B .0500 et seq.]
Grade III Biological Water Pollution Control System [15A NCAC 08G .0302]
a. During the period beginning on the effective date of the permit and lasting until permit expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall he limited and monitored) by
the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample
Parameter Codes Average Average Maximum Frequency Sample Type Location2
Flow 50050 0.98 MGD Continuous Recording I or E
BOD5 20 °C3 5.0 mg/I 7.5 mg/I 3/Week Composite I, E
(April 1—October 30) C0310
BOD5 20°C3
(November 1 —March 10.0 mg/I 15.0 mg/I 3/Week Composite I, E
31)
Total Suspended Solids3 C0530 30.0 mg/I 45.0 mg/I 3/Week Composite I, E
Temperature 00010 Monitor and Report Daily Grab E, U, D
Dissolved Oxygen(DO)4 00300 Footnote 4 3/Week Grab E, U, D
Conductivity 00094 Monitor and Report 3/Week Grab E, U, D
Hardness—Total as 00900
[CaCO3 or(Ca + Mg)]5 Monitor and Report Quarterly Grab U
(mg/L
Hardness—Total as 00900
[CaCO3 or(Ca + Mg)]6 Monitor and Report Quarterly Composite E
(mg/L
Fecal Coliform 31616 200/ 100 ml 400/ 100 ml 3/Week Grab E
(geometric mean)
NH3 as N 2.0 mg/I 6.0 mg/I 3/Week Composite E
(April 1-October 30)
NH3 as N 00630
(November 1 —March 4.0 mg/I 12.0 mg/I 3/Week Composite E
31)
Total Nitrogen, mg/I CO600 Monitor and Report Quarterly Composite E
(NO2 + NO3 +TKN)
Total Phosphorus, mg/I C0665 Monitor and Report Quarterly Composite E
pH 00400 6.0—9.0 standard units 3/Week Grab E
Total Residual Chlorine 50060 28pg/I 3/Week Grab E
Cadmium 01027 1.8 pg/I 9.4 pg/I Monthly Composite E
Copper12 01042 25.04 pg/I 31.04 pg/I Monthly Composite E
Nickel 01067 Monitor and Report Quarterly Composite E
1,4-Dioxane, pg/L8 82388 Monitor and Report Quarterly Grab E
PFAS9 Various Footnote 9 Quarterly Grab E
Silver 01077 Monitor and Report Monthly Composite E
Chronic Toxicity10 TGP3B Footnote 10 Quarterly Composite E
Effluent Pollutant NC01
Scan11 Monitor and Report Footnote 9 E
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system.See
Special Condition A. (4.).
2. I=Influent. E=Effluent. U=Upstream approximately 100 feet upstream from the outfall. D=Downstream approximately
0.5 miles downstream from the outfall. Upstream and downstream samples shall he grab samples collected 3/week during
June,July,August,and September and once per week during the rest of the year. As a participant in the Yadkin Pee-
Dee River Basin Association,instream monitoring for DO,temperature,and conductivity is provisionally waived.
Instream monitoring will he immediately reinstated and the Division shall he notified immediately should the permittee
end its participation in the Association.
II
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Permit NC0021491
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 percent of the
respective influent value(85%removal).
4. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1 from April 1 to October 31,and
no less than 5.0 mg/L from November 1 to March 31.
5. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be representative of
the hardness in the receiving stream.
6. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals(cadmium,
copper,lead,nickel,silver,and zinc).
7. The Division shall consider all effluent total residual chlorine values reported below 50 pg/1 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 pg/l.
8. 1,4 Dioxane samples must be reported to a minimum of PQL s 1 pg/L using EPA Method 624.1.See Special Condition A.
9. See Special Condition A.(6.).
10. Chronic Toxicity(Ceriodnpltnin)at 370/o:January,April,July,and October(see condition A.(2.)).
11. The permittee shall perform three Effluent Pollutant Scans during the term of this permit[see A.(3)].
12. See Special Condition A(8.).
There shall be no discharge of floating solids or visible foam other than trace amounts.
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Permit NC0021491
A. (2.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 37%.
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 January,April,July,and
October.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 on the Effluent Discharge
Monitoring Form(MR-1)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:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
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,thepermittee will complete the information located at the topof the aquatic toxicity (AT)test form
q P
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.
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.
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Permit NC0021491
A. (3.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[G.S.143-215.1(b)]
(a.)Effluent Pollutant Scans.
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. Each annual sample shall coincide
with one quarterly toxicity test each year (see Condition A. (5.) and A. (6.), depending on the outfall used),
and each must be collected in a different calendar quarter to 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-dichlomethylene 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-ethyihexyl)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 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 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
(b.) Effluent Scan Reporting.
Test results shall be reported electronically via eDMR by December 31st of each designated sampling year,
except that,subject to prior written approval by the Director,results can be reported on DWR Form DMR-
PPA-1 or other form approved by the Director.The permittee must at least report completion of the test in the
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Permit NC0021491
eDMR system by entering"1" or"Y" for parameter code NC01-Annual Pollutant Scan.If written reports are
approved,the report shall be submitted to the following address:
North Carolina Division of Water Resources
Central 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
(c.)2nd-Species Toxicity Testing and Reporting.
(i.)In addition to the quarterly toxicity tests required in A. (5.)and A.(6.),depending on the outfall used,the
Permittee shall perform and report the results of four(4) toxicity tests using the same test methods using a
second species of test organism suitable to the tests being conducted.
(ii.)The 2nd species toxicity tests shall be conducted either:
(A)Once per quarter in a single 12-month period(four samples);if this option is chosen,the sample
for each 2nd species test shall coincide with the quarterly samples collected for(tox condition title);or
(B)Once per 12-month period in the four-and one-half year period prior to the scheduled application
for permit renewal(four samples);if this option is chosen,three of the sample for the 2nd species test
shall coincide with those for the annual effluent scans and the coincident quarterly toxicity test,and
each of the four annual samples shall be collected in a different calendar quarter in order to represent
seasonal variation.
(iii.)The results of the toxicity tests shall be submitted to 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.ATB©ncdenr.gov
(iv.)Results of the 2nd species tests shall also be summarized in Part E(Toxicity Testing Data)of EPA
Municipal Application Form 2A when submitting the permit renewal application to the NPDES Wastewater
Program.
The Permittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on
conducting the additional toxicity tests and reporting of the results.
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Permit NC0021491
A. (4) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
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[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 monthly 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 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).
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Permit NC0021491
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 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)1
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:
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Permit NC0021491
"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. lam aware that there are significant
penalties for submitting false information, including the possibility offines and imprisonment for knowing
violations."
5. Records Retention[Supplements Section D.(6.11-
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 122.411
A. (5.) NUTRIENT REOPENER FOR HIGH ROCK LAKE
This permit may be reopened and modified to implement nutrient requirements in accordance with any
future TMDL and/or nutrient management strategy for High Rock Lake.
A. (6.) PFAS MONITORING REQUIREMENT [NCGS 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
A. (7.) REOPENER FOR 1,4-DIOXANE [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.
A. (8.) SCHEDULE OF COMPLIANCE FOR TOTAL COPPER LIMITATIONS (with
option for WER STUDY) [NCGS 143-215.1 (b)]
(a.)Within one(1)year of the permit effective date,by Month date,year the Permittee shall submit to the
Division of Water Resources a Corrective Action Plan(CAP)for Division approval,summarizing the strategy
or actions to be taken to achieve compliance with the Total Copper limitations listed in Section A. (1.).This
plan will include specific dates for completion or implementation of each action.
(b.)Within two(2)years of the effective date of the permit,by Month date,year the Permittee shall submit a
report to the Division summarizing actions taken in accordance with the Action Plan.
(c.)The Permittee shall achieve compliance with Total Copper limitations specified in Section A. (1.) within
three(3)years of the effective date of the permit,by Month date,year.
(d.)Upon approval of the CAP by the Division,the report and actions become an enforceable part of this
permit.The Division can reopen this permit to implement interim or alternative limits based on studies that
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Permit NC0021491
demonstrate an interim or alternate limit is appropriate.Any modifications to the schedule shall be requested
to the Division at least ninety(90) days before the deadline.Modifications to the schedule more than four
months will be subject to public notice.
(e.)This compliance schedule includes the option for pursuing a Water Effect Ratio(WER)study for
developing site-specific limitations and compliance with the Total Copper limit.
(f.) If the Permittee wishes to conduct a WER study to develop site-specific Total Copper limitations,then
within six(6)months of the effective date of the permit,the Permittee shall submit to the Division of Water
Resources a Water-Effect Ratio(WER) study plan for approval.
(g.) Within eighteen(18)months of the WER study plan approval by the Division, the Permittee shall submit
to the Division a report summarizing the results of the WER study.
(h.)If the WER study results in site-specific Total Copper limits that the Permittee wishes to have in the
permit,the Permittee shall submit to the Division a permit modification request to include the WER-derived
limits.
(i.)The final total copper limits based on the WER-derived limits,if approved will be placed into effect
immediately with the permit modification and all remaining schedule items will be removed.
(j.)If the Permittee does not submit a WER study plan within six(6)months of the permit effective date,then
the Permittee shall follow the Compliance Schedule outlined above.
(k.) Alternatively,the Permittee may request this Schedule of Compliance be removed,and the copper
limitations specified in Section A. (1.)be placed into effect.
(1.) WER Study Plan,CAP and 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 Municipal
Permitting Unit 1617 Mail Service Center Raleigh,NC 27699-1617
(2)NCDEQ/ Division of Water Resources Winston-Salem Regional
Office 450 West Hanes Mill Road Winston-Salem,NC 27105
Page 11 of 12

Permit NC0021491
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Town of Mocksville - NC0021491 Facility Location
USGS Quad Number: D 16 NE
Receiving Stream: Dutchman Creek
Stream Class: C
Subbasin:Yadkin 03-07-05
Outfall location: Lat.: 35° 53' 33" N Long.: 80° 30' 07"W