NC0005479_Draft Permit_20241001

ROY COOPER
Govemw-
ELIZABETH S. BISER
secretary
RICHARD E. ROGERS, JR.
Dlncmr
Seth Hatchell
Laurinburg Maxton Airport Commission
16701 Airport Road
Maxton, NC 28364
Dear Permttee:
4P
NORTH CAROLINA
Envb»tut nt lQaan y
October 1, 2024
Subject: Draft of NPDES NC0005479
Laurel Hill/Maxton WWTP
Grade II Biological WPCS
Scotland County
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).
• Footnote 5 has been added to Section A. (L) regarding the parameters of TKN, Nitrate + Nitrite, and
Total Nitrogen
• Section A. (2.) has been updated regarding Whole Effluent Toxicity (WET) testing.
• The site map has been updated.
The NPDES standard conditions (Parts 11, I11, 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.
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,
S`11� 9--*
Sara Bassett
Environmental Specialist I
NPDES Compliance and Expedited Permitting
cc: NPDES files [Laserfiche]
Fayetteville Regional Office [Laserfiche]
Rath Carolina Department ofEnvir antal Quality DinionofWatcReiaurces
D E W�_f SIISimlh Satisbun'Strat 161-AfailSn-ice:tcts Ralei�2:cett:xalira'.:699-161?
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Operator Certification Program [Laserfiche]
Aquatic Toxicity [Laserfiche]

NPDES Permit NC0005479
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
t
In compliance with the provision of North Carolina General -Statute 1.43'215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control`Act, as amended, tfie.
Laurinburg-Maxton Airport Commis
is hereby authorized to discharge wastewater from a facility,located at the
Laurel Hill WWTP
to receiving waters
Lumber River Basi
conditions se(forth
This permit
This permit and autl
If the permittee irate,
application must be
permit).
Signed this day
as Gum Swamp Creek (Ida Mill Pond) in subbasin 03-07-55 of the
ince•with.efflu`ent.limitations, monitoring requirements, and other
3-1, II, III and IV hereof.`-_`•�
♦, 4 �� 4
ffective`. 4 �,
on to discharge shall expire at midnight on August 31, 2029.
;ontinue to discharge at the facility beyond the term of this permit, a renewal
ted no, later than March 4, 2029 (180 days before the expiration of this
John E. Hennessy, Section Chief Regional Operations
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 9

NPDES Permit NC0005479
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 Laurinburg-Maxton Airport
is hereby authorized to:
1. Continue to operate an existing 0.3 MGD wastewater.freatment facility with the following
components: X.,
• Bar screen
• Influent pump station
• 1.7 million gallon aerated equaliz
• Dual 2.72 million gallon aeration
• Dual clarifiers
• Chlorine disinfec
• Dechlorination
• Sludge holding ti
• Sludge belt press
This facility is located at the,Laaurel-Hill_W WTP on Redmond Hill Rd in Laurel Hill in Scotland
County. `
2. Discharge from said'treatment works at the location specified on the attached map into Gum Swamp
Creek (Ida Mill Pond) [Stream Segment: 14-32-(l0)], a waterbody currently classified C-Swamp in
subbasin 03-07-55 [HUC�,0304020401] in the Lumber River Basin.
Page 2 of 9

NPDES Permit NC0005479
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade II Biological WPCS [15A NCAC 08G .0302]
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'
by the Permittee as specified below: f \
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
Monthly
Weekly
Daily
Measurement
Sample
Sample
CHARACTERISTIC
Parameter'Code
Average
Average
Maximum
Frequency
Type_
Location 2
Flow 50050
0.3 MGD
✓
\
Conhn ous
Recording
Influent or
Effluent
Temperature °C 00010
Daily
Grab
Effluent
Temperature °C 00010
C
Weekl`\
\ Grab
U & D
Total Residual
50060
28,µg/L:
" 2/Week
'\ Grab
Effluent
Chlorine
Conductivity 00094
Weekly
Gab
Effluent
mhos/cm
\
Dissolved Oxygen
00300
�_-_
\
,-`
\
ZWeekly
Grab
Effluent,
m
���
U & D
Fecal Coliform
31616
200 / 100
400`/,100
Weekly
(geometric mean f
mL
i
n L.
s'f rt
Grab
Effluent
BOD, 5-day (20°C) 3 00310
22.0 mg2
33.0 mg/L
�'
- Weekly
Composite
Influent and
,rf
Effluent
Total Suspended Solids
) f
'30.0 mg/L-
45.0 in
\
Weekly
Composite
Influent and
N
N./
Effluent
NH3 as N m C0610
` /
I -`
I \ 1
2/Month
Composite
Effluent
H % �00400
>-6.0•and < 9.0'standard units
2/Month
Grab
Effluent
TKN m 6\ 00625
Quarterly
Composite
Effluent
NO3-N + NO2-N�,
00630
\ \,
\
`�
Quarterly
Composite
Effluent
m 5
`
Total Nitrogen (mg/I \6\
`1.
Quarterly
Calculated
Effluent
C0600
Total Phosphorus
C0665
/ )
Quarterly
Composite
Effluent
m
Chronic Toxicity6 TGP3B
f' Pass/Fail LimitQuarter'l
Composite
Effluent
l.f
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see Section A. (3)].
2. U: upstream at NCSR 1319 below Lake Richmond. D: downstream at NCSR 1108.
3. The monthly average effluent concentrations of BOD5 and Total Suspended Solids shall not exceed 15% of
the respective influent value (85% removal).
4. Limit and monitor only if the facility adds chlorine or chlorine derivatives to water that is eventually
discharged. The Division shall consider all effluent TRC 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.
Page 3 of 9

NPDES Permit NC0005479
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 testing of Ceriodaphnia dubia shall be performed at 1.5% during the months of March,
June, September, and December [see Section A. (2)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 9

NPDES Permit NC0005479
A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200] [15A NCAC 02B .0500 et seq]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dabia at an effluent concentration of 1.5%.
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 H 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 THP311 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.ATB(a)deq.nc. ov.
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
Page 5 of 9

NPDES Permit NC0005479
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 - 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 forNPDESPermits):
• Section B. (11.)
• Section D. (2)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
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: hMs://deg.nc.izov/about/divisions/water-resources/edmr.
Page 6 of 9

NPDES Permit NC0005479
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: hUs://www.federalregister.gov/documents/2015/10/22/2015-
24954/national-poll utant-discharge-elimination-system-nodes-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 Reportine
Page 7 of 9

NPDES Permit NC0005479
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:
ho://deg.nc.gov/about/divisions/water-resources/edmr
4. Sisnatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I I.)(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:
htti)://deg.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 offines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)l
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
Page 8 of 9

NPDES Permit NC0005479
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41].
Page 9 of 9

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NC0005479
Laurinburg-Maxton Airport Commission
Facility
Laurel Hill WWTP
Latitude:34"48'S0" HUC:0304020401
Location
Longitude: 79°31'53" Stream Index: 14-32-(10)
Stream Class: C-Swamp Drainage Basin: Lumber
Subbasin:03.07-55
A/_-.�2
✓ a4d
Scotland County
Receiving Stream: Gum Swamp Creek
Map not to scale