NC0036773_Draft Permit_20241029

fit 4
ROY COOPER -;
Governor
MARY PENNY KELLEY
Secretor)
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
October 29,2024
Dixon Medlin
City of Laurinburg
P.O. Box 249
Laurinburg,NC 28352
Subject: Draft of NPDES NC0036773
Laurinburg WTP
Grade I Physical Chemical
Scotland County
Dear Permittee:
The Division has reviewed your request to renew the subject permit. Please review this draft carefully to ensure a
thorough understanding of the information,conditions,and requirements it contains.
This draft contains the following major changes from the existing permit:
• Section A.(3.)has been updated regarding electronic submission of effluent data. Federal regulations
require electronic submittal of all discharge monitoring reports(DMRs).
• A maximum monthly average flow limit has been added to section A.(1.)and monitoring requirements
have been updated.
• The maximum average monthly flow has been updated in the Supplement to Permit Cover Sheet.
• A daily maximum limit for Fluoride has been added to Section A. (1.).
• The compliance schedule has been removed for copper.
• Please note that the practical quantitation limit(PQL)for Total Copper is 2 µg/L (per the Inorganic
Chemistry Branch of the Division of Water Resources Water Sciences Section) and monitoring data
should be reportable down to these levels.
• In accordance with the 2020 Division of Water Resources Water Treatment Plant permitting strategy for
conventional facilities,Whole Effluent Testing requirements have been changed from monitoring only to
a pass/fail limit. See Section A. (1.)and Section A. (2.).
• The parameter of Hardness has been updated in Section A. (1.).
• The parameters of TKN and Nitrate/Nitrite have been added to Section A. (1.)with a footnote. The
sample type for the parameter of Total Nitrogen has been changed to calculated.
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.
With this notification,the Division will solicit public comment on this draft permit by publishing a notice in
newspapers having circulation in the general Scotland County area,per EPA requirements. Please provide your
comments,if any,to me no later than 30 days after receiving this draft permit.
D E
Aorta CthSali Department ofE17Ma l Ser.1t�uali y Division of rt'atnF.es7ur�s
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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 the draft,please contact me via
e-mail at [e-mail] or via phone at 919-707-3600.
Sincerely,
Sara Bassett
Environmental Specialist I
NPDES Compliance and Expedited Permitting
cc: NPDES files [Laserfiche]
Fayetteville Regional Office [Laserfiche]
Operator Certification Program[Laserfiche]
Aquatic Toxicology

NPDES Permit NC0036773
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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
City of Laurinburg
is hereby authorized to discharge wastewater from a facility located at the
Laurinburg WTP
603 Lauchwood Drive
South of Laurinburg
Scotland County
to receiving waters designated as Big Branch 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 September 30, 2029.
If the permittee intends to continue to discharge at the facility beyond the term of this permit, a
renewal application must be submitted no later than April 3, 2029 (180 days before the expiration of
this permit).
Signed this day
John E. Hennessy, Section Chief Regional Operations
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

NPDES Permit NC0036773
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 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 City of Laurinburg
is hereby authorized to:
1. Continue to operate a conventional Water Treatment Plant with a discharge of wastewater from
media filter-backwash. This water treatment plant currently has a design potable flowrate of 8
MGD and a maximum, monthly average discharge of 0.066 MGD. This facility is located at the
Laurinburg WTP (603 Lauchwood Drive) south of Laurinburg, in Scotland County. Wastewater
treatment includes the following wastewater treatment components:
• Dechlorination(Sodium thiosulfate)
• Flow Measurement
2. Discharge from said treatment works via Outfall 001 at the location specified on the attached
map into Big Branch [Stream Index: 14-33-2-1; HUC: 030402040202],classified C-Swamp
waters in the Lumber River Basin.
Page 2 of 8

NPDES Permit NC0036773
PART I.
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq., 02B.0500 et seq.]
Physical Chemical WPCS (grade not classified)
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored
1
by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
eDMR Code Average Maximum Frequency Type Location
Flow 50050 0.076 MGD Continuous Recording Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Month Grab Effluent
>_6.0 and_<9.0 standard
pH 00400 units 2/Month Grab Effluent
Total Residual Chlorine2 50060 17 µg/L 2/Month Grab Effluent
Turbidity 00070 Monitor&Report(NTU) Monthly Grab Effluent
Fluoride 00951 2467 µg/L 2467 µg/L Monthly Grab Effluent
Total Copper3 01042 10.8 µg/L 13.6 µg/L Monthly Grab Effluent
Total Aluminum 01105 Monitor&Report(µg/L) Quarterly Grab Effluent
Total Nitrogen 4 C0600 Monitor&Report(mg/L) Quarterly Calculated Effluent
TKN(mg/L)4 00625 Monitor and Report(mg/L) Quarterly Grab Effluent
NO3-N+NO2-N(mg/L)4 00630 Monitor and Report(mg/L) Quarterly Grab Effluent
Whole Effluent Toxicity5 TGP3B Pass/Fail Limit Quarterly Grab Effluent
Hardness-Total as CaCO3 6 00900 Monitor&Report(mg/L) Quarterly Grab Effluent
Hardness-Total as CaCO3 6°' Monitor&Report(mg/L) Quarterly Grab Upstream
00900
Footnotes:
I. The permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR system.
See Condition A. (3.).
2. The Division shall consider all effluent TRC values reported below 50 ug/1 to be in compliance with the
permit. However,the Permittee shall continue to record and submit all values reported by a North Carolina
certified laboratory(including field certified),even if these values fall below 50 ug/l.
3. Please note that the practical quantitation limit(PQL)for Total Copper is 2 µg/L(per the Inorganic
Chemistry Branch of the Division of Water Resources Water Sciences Section) and monitoring data should
be reportable down to these levels.
4. 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.
5. Chronic Toxicity(Ceriodaphnia dubia) 7-day,pass/fail test at 90%concentration during the months of
February,May,August and November. See condition A. (2.)for details.
6. Effluent hardness sampling should be performed in conjunction with sampling for hardness dependent
metals(Copper).
Page 3 of 8

NPDES Permit NC0036773
7. The Permittee shall sample instream hardness,upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream.
Conditions:
All samples must be collected from a typical discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) CHRONIC TOXICITY PASS/FAIL LIMIT (QUARTERLY)
115A NCAC 02B.0200J
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration 90 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"(Revised December 2010,or subsequent
versions)or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised December
2010, or subsequent versions). The tests will be performed during the months of February,May,August and
November. These months signify the first month of each three-month toxicity testing quarter assigned to the
facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in 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 THP3B for the Chronic Value. Additionally, DWR Form AT-3 (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,NC 27699-1621
Or,results can be sent to the email,ATForms.ATBAdeq.nc.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,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.
Page 4 of 8

NPDES Permit NC0036773
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.
A. (3.) ELECTRONIC REPORTING OF 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)]
The permittee shall report discharge monitoring data electronically using the NC DWR's
Electronic Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. The eDMR system may be
accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
Page 5 of 8

NPDES Permit NC0036773
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:
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
Page 6 of 8

NPDES Permit NC0036773
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)1
i issuing authorityshall be signed bya person described in Part
All eDMRs submitted to the permit ssu g gn
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.)1
Page 7 of 8

NPDES Permit NC0036773
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 8 of 8

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NPDES Permit NC0036773
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Receiving Stream:Big Branch Stream Class: C-Swamp
Stream Segment: 14-33-2-1 Sub-Basin#:03-07-55
River Basin:Lumber HUC:030402040202 SCALE 34.751389° N, -79.465806°W
County: Scotland 1:20,000