NC0020044_Permit (Issuance)_20230724

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Mr. Hilary E. Reed, ORC
Town of Williamston
P.O. Box 506
Williamston, North Carolina 27892
Dear Mr. Reed:
NORTH CAROLINA
Environmental Quality
July 24, 2023
Subject: Final NPDES Permit NCO020044
Williamston WWTP
Martin County
Grade III Biological WPCS
SIC Code 4952
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between
North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently
amended).
No changes have been made to the draft permit sent to you on May 19, 2023. The final permit
maintains the significant changes made to the draft permit sent to you on May 19, 2023:
• The facility components list has been modified to reflect minor changes made to the facility (see
Supplement to Cover Sheet).
• Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES permits
for exceptionally performing facilities, monitoring requirements for BOD5, TSS and Fecal
Coliform have been reduced to twice per week at the 2.0 MGD flow tier [See A. (1)].
• Based on state reporting requirements, 15A NCAC 2B .0508, for Grade III wastewater treatment
plants, monitoring frequencies for BOD5, TSS and Fecal Coliform have been adjusted to 3/week at
the 2.4 MGD flow tier [See A. (2.)] with a provision to reduce the monitoring frequency.
• Based on the low effluent amount to receiving water flows being < 1%, instream hardness
monitoring has been removed from the permit [See A. (1.) and A. (2)].
• A special condition to monitor effluent PFAS chemicals 2/year has been added to the permit, to be
effective six (6) months after EPA has a final wastewater method in 40 CFR136 method published
in the Federal Register [See Special Condition A. (5.) PFAS Monitoring Requirements].
• Some of the wording has changed in Special Condition A. (3.), Chronic Toxicity Permit Limit,
please review each paragraph carefully.
• Special Condition A. (4.) has been modified to include the specific three years in which the Effluent
Pollutant Scan shall be performed (2025, 2026, and 2027).
• 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.
• Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The requirement to continue reporting discharge monitoring data electronically
D E Q �J North Carolina Department of Environmental Quality I Division of Water Resources
v 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NoarHcaaouNa 919.707.9000
oepanmem or En.iroemeemi auMi�

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has
been added to your NPDES permit [See Special Condition A. (6.)].
The NPDES standard conditions (Parts II, III, and IV) that are a part of the permit are not included in this
draft document (cover, map, and Part I). The conditions are the same as in your current permit except that
agency and division names have been updated. The latest version is available at https://bit.ly/3k5NFaL and
can be viewed online or downloaded as a PDF file.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following
receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of
the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail
Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be
final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements
to obtain other permits which may be required by the Division of Water Resources or any other Federal,
State, or Local governmental regulations.
If you have any questions concerning this permit, please contact Gary Perlmutter at [phone] or via
email at [e-mail].
Sincerely,
DocuSigned by, A1, f,,.'' `
C464531431644FE...
for Richard E. Rogers Jr., Director
Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
e-Copy: US EPA Region 4
DWR / Washington Regional Office / Water Quality / Robert Bullock, David May
DWR / Aquatic Toxicology Branch / Cindy Moore, Molly Nicholson
DWR / Municipal Permitting Unit / Keyes McGee
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA — 919.707.9000
Dep dmem of F-Irons W Dual

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
N( PDES)
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 Williamston
is hereby authorized to discharge wastewater from a facility located at the
Williamston WWTP
1801 Willow Drive
Williamston, NC 27892
Martin County
to receiving waters designated as the Roanoke River in the Roanoke River Basin in accordance with the
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III, and
IV hereof
This permit shall become effective September 1, 2023.
This permit and authorization to discharge shall expire at midnight on May 31, 2028.
Signed this day, July 24, 2023.
� A ''
D,ocu,Siigned byy:A A1, k'n.'' A
C464531431644FE...
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management
Commission
Page 1 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
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 Williamston
is hereby authorized to:
1. Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing
2.0 MGD facility consisting of the following components:
• Influent holding well and pump station
• One (1) manual bar screen
• One (1) mechanical fine screen
• Preliminary aerated grit chamber
• Influent flow meter
• Influent composite sampler
• Flow splitter box to oxidation ditch
• One (1) 530,000-gallon extended
agitators
• Flow splitter box to clarifiers
• Two (2) 248,800-gallon clarifiers
• RAS/WAS pump station
• Effluent pump station
• Chlorination with contact basin
• Dechlorination
oxidation ditch basin with six (6) mechanical contact disk
• One (1) 47,050-gallon re -aeration basin
• Effluent flow meter
• Effluent composite sampler
• Two (2) 400,000-gallon sludge lagoons with two (2) telescopic valves per lagoon (4 total), one (1)
sludge loading pump per lagoon (2 total), and two (2) 40 hp vertical aerators per lagoon (4 total).
• Sludge loading station
• One (1) 600 KW diesel standby generator
• One (1) 48 KW LP gas standby generator
This facility is located at the Williamston Wastewater Treatment Plant, near the US 13-17 Bypass at
1801 Willow Drive, east of Williamston in Martin County.
2. Upon approval of an Authorization to Construct for expansion of the Williamston WWTP facility to
2.4 MGD and after submittal of the signed Engineering Certificate, operate the expanded 2.4 MGD
treatment facility.
3. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into
the Roanoke River, classified C waters in the Roanoke River Basin and 03010107 HUC.
Page 2 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
PART
A.(L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [2.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .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 expansion to 2.4
MGD or permit expiration, whichever is sooner, the Permittee is authorized to discharge treated
municipal and industrial wastewater from Outfall 001. Such discharges shall be limited and
monitored 1 by the Permittee as specified below:
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Weekly
Daily
Measurement
Sample
Sample
Parameter Code
Average
Average
Maximum
Frequency
Type
Location
Flow 50050
2.0 MGD
Continuous
Recording
Influent or
Effuent
BOD, 5-day, 20°CZ
C0310
25.0 mg/L
37.5 mg/L
2/week 3
Composite
Influent &
(Apr 1 - Oct 31)
Effluent
BOD, 5-day, 20°C2 C0310
3 0. 0 mg/L
45.0 mg/L
2/week'
Composite
Influent &
(Nov 1 - Mar 31)
Effluent
Total Suspended Solids (TSS) 2 C0530
30.0 mg/L
45.0 mg/L
2/week'
Composite
Influent &
Effluent
Ammonia (NH3 as N)
C0610
16.7 mg/L
35.0 mg/L
3/week
Composite
Effluent
(Apr 1 -Oct 31)
Ammonia (NH3 as N)
C0610
Monitor and Report
Weekly
Composite
Effluent
(Nov 1 - Mar 31), mg/L
Fecal Coliform 31616
200/100 mL
400/100 mL
2/week3
Grab
Effluent
(geometric mean)
Total Residual Chlorine 4 50060
28 µg/L
3/week
Grab
Effluent
Dissolved Oxygen (DO) 00300
Daily Average > 5.0 mg/L
3/week
Grab
Effluent
pH 00400
Between 6.0 and 9.0 Standard Units
3/week
Grab
Effluent
Temperature, °C 00010
Monitor and Report
3/week
Grab
Effluent
TKN, mg/L 00625
Monitor and Report
Monthly
Composite
Effluent
NO3-N + NO2-N, mg/L 00630
Monitor and Report
Monthly
Composite
Effluent
Total Nitrogen', mg/L C0600
Monitor and Report
Monthly
Calculated
Effluent
Total Phosphorus (mg/L) C0665
Monitor and Report
Monthly
Composite
Effluent
PFAS, ng/L various
Monitor and Report
Footnote 6
Grab
Effluent
Chronic Toxicity' TGP3B
Monitor and Report
Quarterly
Composite
Effluent
Pollutant Scan 8 NCO]
Monitor and Report
Footnote 8
Footnote 8
Effluent
Total Hardness (as CaCO3), mg/L 00900
Monitor and Report
Quarterly
Composite
Effluent
Footnotes:
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A. (6.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value
(85% removal).
Footnotes continue on the next page.
Page 3 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
Footnotes (continued
3. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
4. The Division shall consider all effluent total residual chlorine values reported below 50 µg/L to be in compliance
with the permit. However, the Permittee shall continue to record and submit all values reported by a North
Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L.
5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl
Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. See Special Condition A. (5).
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 0.27% with testing in March, June, September, and December. See
Special Condition A. (2).
8. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A. (3).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [2.4 MGD]
[ 15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]
Grade III Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning on receipt of the Engineers Certificate for the 2.4 MGD expansion and
lasting until permit expiration, whichever is sooner, the Permittee is authorized to discharge treated
municipal and industrial wastewater from Outfall 001. Such discharges shall be limited and
monitored 1 by the Permittee as specified below:
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Weekly
Daily
Measurement
Sample
Sample
Parameter Code
Average
Average
Maximum
Frequency
Type
Location
Flow 50050
2.4 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5-day, 20°CZ
C0310
25.0 mg/L
37.5 mg/L
3/week 3
Composite
Influent &
(Apr 1 - Oct 31)
Effluent
BOD, 5-day, 20°CZ
C0310
30.0 mg/L
45.0 mg/L
3/week 3
Composite
Influent &
(Nov 1 - Mar 31)
Effluent
Total Suspended Solids (TSS) 2 C0530
30.0 mg/L
45.0 mg/L
3/week 3
Composite
Influent &
Effluent
Ammonia (NH3 as N)
C0610
16.7mg/L
35.0 mg/L
3/week
Composite
Effluent
(Apr 1 - Oct 31)
Ammonia (NH3 as N)
C0610
Monitor and Report
Weekly
Composite
Effluent
(Nov 1 - Mar 31), mg/L
Fecal Coliform 31616
200/100 mL
400/100 mL
3/week 3
Grab
Effluent
(geometric mean)
Total Residual Chlorine 3 50060
28 µg/L
3/week
Grab
Effluent
Dissolved Oxygen (DO) 00300
Daily Average > 5.0 mg/L
3/week
Grab
Effluent
pH 00400
Between 6.0 and 9.0 Standard Units
3/week
Grab
Effluent
Temperature, °C 00010
Monitor and Report
3/week
Grab
Effluent
TKN, mg/L 00625
Monitor and Report
Monthly
Composite
Effluent
NO3-N + NO2-N, mg/L 00630
Monitor and Report
Monthly
Composite
Effluent
Total Nitrogen 4, mg/L C0600
Monitor and Report
Monthly
Calculated
Effluent
Total Phosphorus (mg/L) C0665
Monitor and Report
Monthly
Composite
Effluent
PFAS, ng/L various
Monitor and Report
Footnote 5
Grab
Effluent
Chronic Toxicity 6 TGP3B
Monitor and Report
Quarterly
Composite
Effluent
Pollutant Scan' NCO]
Monitor and Report
Footnote 7
Footnote 7
Effluent
Total Hardness (as CaCO3), mg/L 00900
Monitor and Report
Quarterly
Composite
Effluent
Footnotes:
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A. (6.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value
(85% removal).
Footnotes continue on the next page.
Page 5 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
Footnotes (continued
3. After six (6) consecutive months of 3/week sampling, the Permittee may request a reduction in the monitoring
frequency to 2/week sampling for BOD5, TSS and/or Fecal Coliform for which no effluent permit limit violations
have occurred. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
This future change in monitoring frequency for these parameters would be considered a minor permit
modification.
4. The Division shall consider all effluent total residual chlorine values reported below 50 µg/L to be in compliance
with the permit. However, the Permittee shall continue to record and submit all values reported by a North
Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L.
5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl
Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. See Special Condition A. (5.).
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 0.32% with testing in March, June, September, and December. See
Special Condition A. (2.).
8. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A. (3).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A.(3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200, .0500 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 0.27% at 2.0 MGD and 0.32% at 2.4 MGD.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or
subsequent versions) or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised December 2010, or subsequent versions). The tests will be performed during the months of
March, June, September, and December. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below
the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the
two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -December 2010, or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed, using the parameter code TGP3B
for the pass/fail results and THP313 for the Chronic Value. Additionally, DWR Form AT-3 (original) is to
be sent to the following address:
Page 6 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Or, results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine
is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Water
Sciences Section at the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three-month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the
last day of the month following the month of the initial monitoring.
Page 7 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
A.(4.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[NCGS 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: 2025,
2026, and 2027. 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. (3.)
CHRONIC TOXICITY PERMIT LIMIT), 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-dichloroethylene
34546
Bis (2-chloroethyl) ether
34273
Chlorine (total residual, TRC)
50060
1,1-dichloroethylene
34501
Bis (2-chloroisopropyl) ether
34283
Dissolved oxygen
00300
1,2-dichloropropane
C0541
Bis (2-ethylhexyl) phthalate
C0100
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-tichlorobenzene
C0551
1,1-dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Page 8 of 13

DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NC0020044
(b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December 31 st
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 eDMR system by entering " 1 " or "Y" for parameter
code NCO 1 - 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:Hedocs.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 Condition A. (3.) CHRONIC TOXICITY
PERMIT LIMIT, 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
Condition A. (3.) CHRONIC TOXICITY PERMIT LIMIT; 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
samples 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, [e-mail].
(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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DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
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A.(5.) 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 2/year frequency.
Find the current parameters listed under Table 1 of the 3rd Draft Method 1633 Analysis of Per- and
Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS at:
http s: //www. epa. gov/system/files/documents/2022-
12/3rd%20Draft%20Method%201633%20December%202022°/02012-20-22_508.pdf
A.(6.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[NCGS 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted monthly 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 the households have broadband access,
then a temporary waiver from the NPDES electronic reporting requirements may be granted and
discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative forms
approved by the Director. Duplicate signed copies shall be submitted to the following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
See "How to Request a Waiver from Electronic Reporting" section below.
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DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
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Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the completed
reporting period. 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; and
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 EPXs 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 EPXs 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 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
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DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
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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:
"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.)]
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].
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DocuSign Envelope ID: 92F4C814-7A92-4388-A4A9-OE8985B44B19
NCO020044
US HWY 13-17
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Longitude: 77° O1' 24.8" W 770 01' S1.1" W
Stream Class: C
Basin: Roanoke HUC: 03010107 North Williamston WWTP NCO020044
Receiving Stream: Roanoke River Martin County
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