NC0021873_Draft Permit_20180501

ROY COOPER
Governoi
{�y
MICHAEL S.REGAN
Secrelaiy
LINDA CULPEPPER
Water Resources bite,lin Direct();
ENVIRONMENTAL QUALITY
May 1, 2018
Mr. Michael Brandt
Town Manager
Town of Mayodan
210 W. Main Street
Mayodan,NC 27027
Subject: Draft NPDES Permit Renewal
Permit NC0021873
Town of Mayodan WWTP
Rockingham County
Class III and IV Facility
SIC Code 4952
Dear Mr. Brandt:
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:
• Upstream and effluent total hardness quarterly monitoring has been added to the permit for
all flow tiers (2.5, 3.0 and 4.5 MGD) as required by the implementation guidance for the
new dissolved metal standards [See A. (1.), A. (2.) and A. (3.)].
• Based on Reasonable Potential Analysis(RPA)results,monitoring for total silver and total
copper has been removed from the permit for all flow tiers [See A. (1.),A. (2.)and A. (3.)].
• Monitoring for total chromium at flow tier of 2.5 MGD has been removed from the permit
based on RPA results [See A. (1.)].
• Effluent limitations=and'monitoring for total chromium at flow tiers of 3.0 and 4.5 MGD
have been removed from the permit based on RPA results [See A. (2.) and A. (3.)].
• Monitoring for total lead at flow tier of 4.5 MGD has been added to the permit based on
the RPA results [See A. (3.)].
• Effluent mercury data was reviewed from April 2014 to December 2017. In accordance
with the 2012 Mercury TMDL NPDES Guidance the permittee needs to show annual
average effluent concentrations below the Water Quality Based Effluent Limitation
(WQBEL) and the individual mercury sample result below the Technology Based Effluent
Limitation (TBEL). A review of the data showed that both criteria were met for all flow
tiers; therefore, mercury limitations and monitoring have been removed from the permit
[See A. (1.), A. (2.) and A. (3.)].
• Based on Mercury TMDL evaluation, permittee shall continue implementing Mercury
Minimization Plan(MMP)during this permit term.A progress report discussing the results
State of North Carolma I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolma 27699-1617
919 807 6300

Page 12
of the MMP implementation shall be submitted next permit renewal application [See A.
(6.)].
• Instream monitoring requirements have been added to Effluent Limitations and Monitoring
Requirements footnotes [See A. (1.), A. (2.) and A. (3.)] and Special condition A. (7.)
mstream monitoring requirements has been removed from the permit.
• Some of the wording has changed in Special Condition A. (4.), Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• Special Condition A. (5.) has been modified to include the specific three years in which
the effluent Pollutant Scan shall be performed (2019, 2020, 2021). In addition, at the end
of the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and program reports. The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR)
internet application has been added to your NPDES permit[See Special Condition A. (7.)].
• Parameter characteristic codes have been added to the Effluent Limitations and Monitoring
Requirements [ See A. (1.), A. (2.) and A. (3.)].
• Regulatory citations have been added to the permit.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Rockingham 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) 807- 6396 or by email at [e-mail].
Sincerely,
Qais Banihani, Engineer
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: DWR/Winston-Salem Regional Office/Water Quality
US EPA Region 4
Wastewater Operator Certification Group/Maureen Kinney
DWR/Aquatic Toxicology Branch/Susan Meadows
NCWRC/Shari L. Bryant

Permit NC0021873
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended, the
Town of Mayodan
is hereby authorized to discharge wastewater from a facility located at the
Mayodan Wastewater Treatment Plant
293 Cardwell Road
Mayodan, NC 27027
Rockingham County
to receiving waters designated as the Mayo River in the Roanoke 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 XX, 2X.
This permit and authorization to discharge shall expire at midnight on May 31, 2022.
Signed this day idual , , _,L,ac
DRAFT
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 14

Permit NC0021873
SUPPLEMENT TO PERMIT COVER SHEET •
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked, and as
of this issuance, any previously issued permit beanng this number is no longer effective. Therefore,the exclusive
authority to operate and discharge from this facility anses under the permit conditions, requirements, terms, and
provisions descnbed herein.
The Town of Mayodan is hereby authorized to:
1. Continue to operate an existing 4.5 MGD wastewater treatment facility that includes the following
wastewater treatment components:
• Mechanical bar screen
• Dual path aeration basins , 7
• Secondary clarifiers
• Liquid Chlorination
• Liquid Dechlorination
• Effluent flow meter
• Sludge thickener
• Aerobic digester
• Backup generator
This permitted facility is located at 293 Cardwell Road, Mayodan,NC 27027 in Rockingham
County.
2. Continue to operate at 2.5 MGD wastewater treatment facility until the average flow for any calendar
year exceeds 80% of the permitted flow (2.0 MGD), after which time the facility must notify DWR
(NPDES Permitting and DWR Winston-Salem Water Quality staff) and monitor in accordance with
effluent limitations and monitoring requirements specified for 3.0 MGD, and
3. Continue to operate at 3.0 MGD wastewater treatment facility until the average flow for any calendar
year exceeds 80% of the permitted flow (2.4 MGD), after which time the facility must notify DWR
(NPDES Permitting and DWR Winston-Salem Water Quality staff) and monitor in accordance with
effluent limitations and monitoring requirements specified for 4.5 MGD, and
4. Discharge from said treatment works via Outfall 001 [specified on the attached map] into the Mayo
River, a Class C waterbody within the Roanoke River Basin.
Page 2 of 14

Permit NC0021873
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (2.5 MGD)
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Beginning on the permit effective date and lasting until the twelve(12)month average flow for any calendar year
exceeds 2 0 MGD, or 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
Facility Class III
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency 2 Type Location 2
Flow 50050 2 5 MGD Continuous Recording Influent or Effluent
BODS(20°C)3 C0310 30 0 mg/L 45 0 mg/L 2/Week Composite Influent and
Effluent
Total Suspended Solids Influent and
(TSS)3 C0530 30 0 mg/L 45 0 mg/L 2/Week Composite Effluent
Ammonia(NH3 as N) C0610 16 0 mg/L 35 0 mg/L 2/Week Composite Effluent
(April 1 -October 31)
Ammonia(NH3 as N)mg/L
(November 1 March 31) C0610 Weekly Composite Effluent
Total
(TRC)Residual Chlorine 50060 28 pg/L 3/Week Grab Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL 3/Week Grab Effluent
(geometric mean)
pH 00400 Between 6 0 and 9 0 standard units 3/Week Grab Effluent
Dissolved Oxygen(DO) 00300 3/Week Grab Effluent
Temperature(°C) 00010 3/Week Grab Effluent
Conductivity(pmhos/cm) 00094 3/Week Grab Effluent
Total Nitrogen C0600 Monthly Composite Effluent
(NO3+NO2+TKN)
Total Phosphorus C0665 Monthly Composite Effluent
Total Hardness[as CaCO3 00900 Monitor and Report QuarterlyComposite Effluent
or(Ca+Mg)](mg/L)5 p p
Chronic Toxicity 6 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 7 Footnote 7 Effluent
pH 00400 Variable Grab U,D
Dissolved Oxygen(mg/L) 00300 Variable Grab U, D
Page 3 of 14

Permit NC0021873
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily MEASUREMENT Sample Sample
Average Average Maximum FREQUENCY s Type Location 2
Temperature(°C) 00010 Variable Grab U, D
Conductivity(pmhos/cm) 00094 Variable Grab U, D
Total Hardness[as CaCO3 00900 Monitor and Report QuarterlyGrab U
or(Ca+Mg)](mg/L)8 p
Notes
1 Submit discharge momtonng reports electronically using the NC DWR's eDMR application system See section A.
(7)
2 Instream samples shall be collected three times per week from June 1 through September 30, and once per week from
October 1 through May 31 U=NC Hwy 135,D=NCSR 2177
3 The monthly average effluent BODS and TSS concentrations shall not exceed 15%of the respective mfluent value(i e,
85%removal is required)
4 Limit and monitoring apply only if chlorine or chlorine derivatives are used for dismfection The Division shall
consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit However,the Permittee
shall record and submit all values reported by a North Carolina certified laboratory(mcludmg field certified), even if
these values fall below 50µg/L
5. Sample m conjunction with effluent metals for the pretreatment program
6 Chrome Toxicity(Ceraodaphnia)at 5%with testing m March,June,September and December[see A (4)].
7 The permittee shall perform three Effluent Pollutant Scans durmg the term of this permit[see A. (5)]
8 The permittee shall sample mstream hardness upstream of the facility's discharge. The sample shall be representative
of the hardness m the receivmg stream The permittee is responsible for submitting mstream hardness test results with
its permit renewal application package
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
Page 4 of 14

Permit NC0021873
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (3.0 MGD)
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
During the penod after the twelve (12) month average flow exceeds 2.0 MGD and lasting until the twelve (12)
month average flow for any calendar year exceeds 2.4 MGD, or until permit expiration, the Permittee is
authonzed to discharge from Outfall 001. Such discharges shall be limited' and monitored' by the Permittee as
specified below:
Facility Class IV
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency 2 Type Location 2
Flow 50050 3 0 MGD Continuous Recording Influent or Effluent
BODS(20°C)3 C0310 30 0 mg/L 45 0 mg/L 2/Week Composite Influent and
Effluent
Total Suspended Solids C0530 30 0 mg/L 45 0 mg/L 2/Week Composite
Influent and
(TSS)3 g g p ' Effluent
Ammonia(NH3 as N)
(April 1 October 31) C0610 14.0 mg/L 35 0 mg/L , 2/Week Composite' Effluent
Ammonia(NH3 as N)mg/L
(November 1 March 31) C0610 Weekly Composite Effluent
Total Residual Chlorine 50060 28 pg/L Daily Grab Effluent
(TRC)4
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab Effluent
(geometric mean)
pH 00400 Between 6 0 and 9 0 standard units Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily Grab Effluent
Temperature(°C) 00010 Daily Grab Effluent
Conductivity(Nmhos/cm) 00094 Daily Grab Effluent
Total Nitrogen
(NO3+NO2+TKN) C0600 Monthly Composite Effluent
Total Phosphorus C0665 = Monthly Composite Effluent
Total Hardness[as CaCO3 00900 Monitor and Report Quarterly Composite Effluent
or(Ca+Mg)](mg/L)5
Chronic Toxicity 6 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 7 Footnote 7 Effluent
pH 00400 Variable Grab U, D
Dissolved Oxygen(mg/L) 00300 Variable Grab U, D
Page 5 of 14

Permit NC0021873
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily MEASUREMENT Sample Sample
Average Average Maximum FREQUENCY 2 Type Location 2
Temperature(°C) 00010 Variable Grab U, D
Conductivity(pmhos/cm) 00094 Variable Grab U, D
Total Hardness[as CaCO3 00900 Monitor and Report QuarterlyGrab U
or(Ca+Mg)](mg/L)8 p
Notes
1 Submit discharge momtormg reports electromcally usmg the NC DWR's eDMR application system. See section A
(7-)
2 Instream samples shall be collected three times per week from June 1 through September 30, and once per week from
October 1 through May 31 U=NC Hwy 135,D=NCSR 2177.
3 The monthly average effluent BODS and TSS concentrations shall not exceed 15%of the respective influent value(i e.,
85%removal is required)
4 Limit and momtonng apply only if chlorine or chlonne derivatives are used for disinfection The Division shall
consider all effluent TRC values reported below 50 µg/L to be in compliance with the penmt However,the Permittee
shall record and submit all values reported by a North Carolina certified laboratory(including field certified), even if
these values fall below 50µg/L.
5. Sample m conjunction with effluent metals for the pretreatment program
6 Chronic Toxicity(Cerzodaphnza)at 6%with testing m March,June, September and December[see A (4.)]
7. The permittee shall perform three Effluent Pollutant Scans during the term of this permit[see A (5)]
8 The permittee shall sample mstream hardness upstream of the facility's discharge The,sample shall be representative
of the hardness in the receiving stream. The permittee is responsible for submittmg insfream hardness test results with
its penmt renewal application package.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
i
Page 6 of 14

Permit NC0021873
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.5 MGD)
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
During the period after the twelve (12) month average flow for any calendar year exceeds 3.0 MGD, and
lasting until permit expiration, the Permittee is authorized to discharge from Outfall 001 Such discharges shall
be limited and monitored' by the Permittee as specified below.
Facility Class IV
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency 2 Type Location 2
Flow 50050 4 5 MGD Continuous Recording Influent or Effluent
BODS(20°C)3 C0310 30 0 mg/L 45 0 mg/L 2/Week Composite Influent and
Effluent
Total Suspended Solids C0530 30 0 m /L 45 0 m /L 2/Week Com osite Influent and
(TSS)3 g g p Effluent
Ammonia(NH3 as N)
(April 1 -October 31) C0610 9 0 mg/L 27 0 mg/L 2/Week Composite Effluent
Ammonia(NH3 as N) C0610 31 5 mg/L 35 0 mg/L 2/Week Composite Effluent
(November 1 -March 31)
Total Residual Chlorine 50060 28 pg/L Daily Grab Effluent
(TRC)4
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab Effluent
(geometric mean)
pH 00400 Between 6 0 and 9 0 standard units Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily Grab Effluent
Temperature(°C) 00010 Daily Grab Effluent
Conductivity(pmhos/cm) 00094 Daily Grab Effluent
Total Nitrogen C0600 Monthly Composite Effluent
(NO3+NO2+TKN)
Total Phosphorus C0665 Monthly Composite Effluent
Total Lead 5 1051 Monitor and Report Quarterly Composite Effluent
Total Hardness[as CaCO3 00900 Monitor and Report Quarterly Composite Effluent
or(Ca+Mg)](mg/L)6
Chronic Toxicity 6 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 7 Footnote 7 Effluent
pH 00400 Variable Grab U,D
Dissolved Oxygen(mg/L) 00300 Variable Grab U,D
Page 7 of 14

Permit NC0021873
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily MEASUREMENT Sample Sample
Average Average Maximum FREQUENCY 2 Type Location 2
Temperature(°C) 00010 Variable Grab U,D
Conductivity(pmhos/cm) 00094 Variable Grab U, D
Total Hardness[as CaCO3 00900 Monitor and Report QuarterlyGrab U
or(Ca+Mg)](mg/L)8 p
Notes
1 Submit discharge momtormg reports electronically using the NC DWR's eDMR application system See section A.
(7.).
2 Instream samples shall be collected three times per week from June 1 through September 30, and once per week from
October 1 through May 31 U=NC Hwy 135,D=NCSR 2177
3 The monthly average effluent BODS and TSS concentrations shall not exceed 15%of the respective influent value(i e,
85%removal is required)
4 Limit and momtormg apply only if chlorine or chlorine derivatives are used for disinfection The Division shall
consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However,the Permittee
shall 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 Sample in conjunction with effluent metals for the pretreatment program
6. Chronic Toxicity(Ceriodaphnia)at 9%with testing m March,June, September and December[see A (4)]
7 The permittee shall perform three Effluent Pollutant Scans durmg the term of this permit[see A (5)]
8 The permittee shall sample mstream hardness upstream of the facility's discharge The sample shall be representative
of the hardness m the receiving stream The permittee is responsible for submitting mstream hardness test results with
its permit renewal application package
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
Page 8 of 14

Permit NC0021873
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 5% at 2.5 MGD flow regime, 6% at 3.0
MGD flow regime and 9% at 4.5 MGD flow regime.
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 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,NC 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, the permittee will complete the information located at the top of the aquatic toxicity(AT)test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of"No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Page 9 of 14

Permit NC0021873
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 maybe 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.) EFFLUENT POLLUTANT SCAN
[G.S. 143-215.1(b)]
The Permittee shall perform a total of tiree (3) Effluent Pollutant Scans, Jroall parameters listed below. One
scan must be performed m each of the following years 2019, 2020, and 2021. 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) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether
Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether
Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride, Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene -- Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper' Vmyl chloride 3,3-dichlorobenzidme
Lead ' Acid-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
' Nickel 2-chlorophenol 2,4-dmitrotoluene
Selenium 2,4-dichlorophenol 2,6-dmitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dumtro-o-cresol Fluoranthene
Zinc 2,4-dmitrophenol Fluorene
Cyanide , % ' 2-mtrophenol Hexachlorobenzene
Total phenolic compounds 4-mtrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolem Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-mtrosodi-n-propylamme
Chlorodibromomethane Benzidme N-nitrosodimethylamme
Chloroethane Benzo(a)anthracene N-mtrosodiphenylanune
2-chloroethylvmyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Page 10 of 14

Permit NC0021873
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis(2-chloroethoxy)methane
Reporting. Test results shall be reported on DWQ Form-A MR-PPA1 (or in a form approved by the Director)by
December 31st of each designated sampling year. The report shall be submitted to the following address: NC
DENR/DWQ/Central Files, 1617 Mail Service Center,Raleigh,North Carolina 27699-1617.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Mumcipal
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 122.210)(5)/11e 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 m the four and one half year penod 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 , '
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.
A. (6.) MERCURY MINIMIZATION PLAN (MMP): '
[G.S. 143-215.1 (b)] f/
The permittee shall continue implementing the mercury minimization plan during this permit term. 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.
A. (7.) ELECTRONIC REPORTING OF MONITORING REPORTS [NCGS 143-215.1 (b)]
/` [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 Section 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.
Page 11 of 14

Permit NC0021873
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. Until such time that the state's
eDMR application is compliant with EPA's Cross-Media Electronic Reporting Regulation
(CROMERR),permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DEQ/DWR/Water Quality Permitting Section
Attn: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
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 mailing
address above. 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 21,2020, 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.
Page 12 of 14

Permit NC0021873
• 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 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)I
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part 11.
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://d eq.nc.gov/about/divi sions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, 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 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 13 of 14

Permit NC0021873
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Page 14 of 14