NC0026921_Draft Permit_20240723

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Dfrector
Doris Underwood, Mayor
Town of Parkton
PO Box 55
Parkton, NC 28371
Mayor Underwood:
NORTH CAROLINA
Environmental Quality
July 23, 2024
Subject: Draft NPDES Permit NCO026921
Parkton WWTP
Grade II Biological WPCS
Robeson County
Attached 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. We
understand from your renewal application that there have been no treatment system changes. There are a
few changes in the draft attached here from the existing permit. These changes are summarized below.
• Regulatory Citations - Language has been added where necessary in the permit to provide regulatory
citations for permit requirements.
• Electronic Reporting - Permit language has been modified to be consistent with the finalization of
federal requirements for electronic reporting.
• Language on the Supplement to Permit Cover Sheet has been updated.
• Ammonia (NH3-N) Limits - Under your current flow limit (0.2 MGD) this facility has had NH3-N
limits and Whole Effluent Toxicity (WET) requirements since the early 1990's. Documentation in
this time frame shows that the permittee accepted the addition of WET requirements and existing
NH3-N limits rather than receiving more stringent NH3-N limits. Revised ammonia criteria,
consistent with EPA requirements, no longer allow for the use of action level standards (like WET
testing in this case) to be used in place of otherwise required chemical limitations (more stringent
NH3-N limits). In response to this adjustment the NH3-N limits in the permit have been reduced as
shown in the table below:
New Ammonia NH3-N Limits
Season
Monthly Average
Weekly Average
(mglL)
(mglL)
Summer
2
6
Winter
4
12
Please be aware of footnote 4 in the effluent table in Section A.(1) which establishes a two (2) year
compliance schedule for meeting these reduced limits. The two (2) years will be from the effective
date of the final issued permit. Until that time, previous NH3-N limits will be in place. WET
requirements will remain in the permit since the facility has failed three (3) of the last seven (7) tests.
D Q
�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NORTH GAFF - + •
u�oxunW or en.�.o���.mai 0-"' 919.707.9000

Doris Underwood
Parkton WWTP Draft Renewal
Page 2
Total Nitrogen (TN) — Reporting for TN now includes the constituent parameters used in calculating
the value - TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl
Nitrogen, and NO3-N + NO2-N is Nitrate plus Nitrite Nitrogen, respectively. These values are shown
in the Effluent Table individually and are all required to be reported in your eDMR report.
Map Update — The permit map and descriptive information on the permit map have been updated.
Permit Expiration — The date has been changed to October 31, 2029 to allow for a nearly full five
year permit term.
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. The latest
version of the standard conditions 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 general
circulation in the Robeson County area soliciting public comments on this draft permit.
Please provide any written comments you may have to me 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 by email at [e-mail]. At this time, contact by email is the most
effective method. If we need to set up a call to discuss any issues, we can set that up through email.
Sincerely,
Bradley Bennett
Compliance and Expedited Permitting Unit
cc: NPDES Files - electronic
Fayetteville Regional Office / Water Quality — electronic
Operator Certification Program/Jeffrey Talbott — electronic
Aquatic Toxicology / Cindy Moore and Molly Nicholson — Electronic

Draft Permit NCO026921
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
PDES
In compliance with the provision 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 Parkton
is hereby authorized to discharge wastewater from a facility located at the
Parkton WWTP
240 Sewer Plant Drive (NCSR 1724)
Parkton, NC
Robeson County
to receiving waters designated as Dunns Marsh in the Lumber 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
This permit and authorization to discharge shall expire at midnight on October 31, 2029.
If the permittee intends to continue discharging at the facility beyond the term of this permit, a renewal
application must be submitted no later than May 4, 2029 (180 days before the expiration of this permit)
Signed this day.
John Hennessy, Regional Operations Section Chief
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 9

Draft Permit NCO026921
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 Parkton
is hereby authorized to:
1. Continue operating an existing 0.200 MGD wastewater treatment works consisting of:
• Mechanical bar screen, grit removal, influent splitter box
• Two oxidation ditches (operated as parallel treatment trains)
• Two clarifiers
• Two sludge recirculation and waste pumping stations
• Parshall flume and flow meter
• Chlorination / dechlorination
• Step-down post -aeration
• Aerated sludge digester
• Sludge drying beds
• Effluent piping and sample point
The facility is located at the Parkton WWTP, 240 Sewer Plant Drive (NCSR 1724), Parkton, NC,
Robeson County.
2. Discharge from said treatment works via Outfall 001, at the location specified on the attached map
into Dunns Marsh [Stream Segment 14-22-1-3-2], a waterbody currently classified C-Swamp within
subbasin 03-07-53 [1 UC: 030402030601] of the Lumber River Basin.
Page 2 of 9

Draft Permit NCO026921
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade II Biological Water Pollution Control System [15A NCAC 08G.0302]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee
is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored' by the
Permittee as specified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARTACTERISTICS
Daily
DaDaimu
Monthly
Weekly
MaxInFrequency
Measurement
Sample
Sample
eDMR Code
Average
Average
Type
Location
Flow MGD
( )
50050
0.200
Continuous
RecordingInfluent
or
Effluent
Temperature (°C)
00100
Daily
Grab
Effluent
Total Residual Chlorine
50060
17 µg/L 3
2/Week
Grab
Effluent
BOD, 5 day (20°C)3
C0310
15.0 mg/L
22.5 mg/L
Weekly
Composite
Influent &
(April 01 — October 31)
Effluent
BOD, 5 day (20°C)3
C0310
24.0 mg/L
36.0 mg/L
Weekly
Composite
Influent &
(Nov 01 — Mar 31)
Effluent
Total Suspended Solids3
C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
fluent
I Efflu n&
NH3-N 4
(April 01 — Oct 31
C0610
2.0 mg/L 4
6.0 mg/ L 4
Weekly
Composite
Effluent
NH3-N 4
(Nov 01 — Mar 31
C0610
4.0 mg/ L 4
12.0 mg/ L 4
Weekly
Composite
Effluent
Dissolved Oxygen
00300
Daily Average > 5.0 mg/L
Weekly
Grab
Effluent
Fecal Coliform
31616
200/100 ml
400/100 ml
Weekly
Grab
Effluent
(geometric mean
pH (Standard Units)
00400
> 6.0 and < 9.0 standard units
2/Month
Grab
Effluent
TKN (mg/L)
00625
Monitor and Report
Weekly
Composite
Effluent
NO3-N + NO2-N (mg/L)
00630
Monitor and Report
Weekly
Composite
Effluent
Total Nitrogen5 (mg/L)
C0610
Monitor and report
Quarterly
Calculated
Effluent
Total Phosphorus
C0665
Monitor and report
Quarterly
Composite
Effluent
Chronic Toxicity6
TGP3B
Monitor and report
Quarterly
Composite
Effluent
Total Mercury
COMER
Monitor and report
Once/Term
Grab
Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [See A. (4.)].
2. The Permittee shall monitor for TRC only if chlorine is used to disinfect. The Division will consider compliant all
values reported below 50µg/L. However, the Permittee shall continue to report all values detected by NC -Certified
test methods (including field certified) even if values are detected below 50µg/L.
3. The monthly average BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective
influent values (i.e., 85% removal required).
4. NH3-N Limits — The new limits noted in the Effluent Table will become effective 2 years from the effective date
of this permit. Until that time, the previous limits will remain in place:
- summer limits: 5 mg/L monthly average and 15 mg/L weekly average
- winter limits: 9 mg/L monthly average and 27 mg/L weekly average
Page 3 of 9

Draft Permit NCO026921
Footnotes Con't:
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. Chronic Toxicity (Ceriodaphnia) P/F at 90%: January, April, July & October [see A. (2)].
7. Mercury analyses shall be conducted once during the permit term in accord with low-level field and lab testing
protocol EPA Method 1631E or as subsequently modified [see Section A (5)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
This permit contains Sludge [biosolids] Monitoring Requirements for Mercury (see A. (3.)].
A. (2.) CHRONIC TOXICITY PASS/FAIL MONITORING (QUARTERLY)
[15ANCAC 02B.0200 et seq.]
The Permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent
versions.
The effluent concentration defined as treatment two in the procedure document is 90 %. The testing
shall be performed as a Ceriodaphnia dubia 7-day pass/fail test. The tests will be performed during the
months of January, April, July & 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.
All toxicity testing results required as part of this permit condition will be entered electronically using
the Division's eDMR system for the month in which it was performed, using the parameter code
TGP313. Additionally, DWR Form AT-1 (original) is to be sent to the following address::
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email, ATForms.ATBgncdenr.gov.
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 and
accurate and include all supporting chemical/physical measurements performed in association with the
toxicity tests, as well as all dose/response data. 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, then
monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test
requirement will revert to quarterly in the months specified above.
Page 4 of 9

Draft Permit NCO026921
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later
than the last day of the month following the month of the initial monitoring.
A. (3.) SLUDGE MONITORING REQUIREMENTS
[G.S. 143-215.1 (b)]
The Permittee shall monitor facility -generated sludge (bio-solids) for mercury.
• Sludge samples shall be collected semi-annually.
• The laboratory detection limit for mercury in sludge is 0.1 mg/Kg (dry weight).
• After securing sludge monitoring results, the Permittee shall submit to the
Division.
• If no sludge is generated during a semi-annual timeframe the Permitee shall
provide documentation to the Division to indicate that no sludge was generated.
This will serve to meet the permittee's monitoring requirement.
A. (4.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[G.S. 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December
21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. The eDMR system may be
accessed at: https:Hdeq.nc.gov/about/divisions/water-resources/edmr.
Page 5 of 9

Draft Permit NC0026921
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.
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;
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: hgps://www.federalre ig ster.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 6 of 9

Draft Permit NC0026921
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:Hdeq.nc. jzov/about/divisions/water-resources/edmr
4. Si2natory 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. (I 1.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (I 1.)(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:
hqp:Hdeq.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. "
Page 7 of 9

Draft Permit NC0026921
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].
A. (5.) TOTAL MERCURY MONITORING
[G.S. 143-215.1(a)(2) and 143-215.66]
The Permittee shall provide one effluent mercury analysis, using EPA Method 1631E, in conjunction
with the next permit renewal application. The analysis should be taken within 12 months prior to the
application date. Any additional effluent mercury measurements conducted from the effective date of
this permit and up to the application date shall also be submitted with the renewal application.
1-1
Page 8 of 9

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Outfall
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Town of Parkton
Parkton WWTP
Receiving Stream:
Dunns Marsh Stream Class:
C; SW
River Basin:
Lumber Sub -Basin:
03-07-53
Outfall Latitude:
34' 52' 55" Outfall Longitude:
78' 59' 59"
Stream Segment
14-22-1-3-2 HUC#:
030402030601
Grid/Quad:
H23NW / Hope Mills County:
Robeson
Facility
Location
(not to scale)
4TH NPDES Permit NCO026921
Page 9 of 9