NC0087840_Draft Permit_20240216

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ROY COOPER
Governor
ELIZABETH BISER
Secretary 'd►vwro►'
RICHARD E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
February 20, 2024
The Honorable Luther H. Lewis, Jr., Mayor
Town of Middlesex
P. O. Box 69
Middlesex,North Carolina 27557
Subject: Review of Permit- Renewal DRAFT
NPDES NCO087840
Middlesex Well No.4 WTP, Class PC-I
10921 East Finch Street, Middlesex
Nash County
Your Honor:
In response to your request to renew the subject NPDES permit, received on May 22, 2023, the
Division of Water Resources (DWR or the Division)hereby transmits this draft permit for your review
and comment. Please review this document carefully to assure your understanding of the permit limits
and monitoring conditions, and to correct errors, if any.
Concurrent with this notification, the Division will solicit public comment on this draft by publishing a
notice in newspapers having circulation in the general Nash County area, as required by the NPDES
Program. Please provide your written comments, if any, to me via email [e-mail]], or
write to my attention care of NCDEQ/DWR/NPDES Program no later than March 22, 2024,
approximately 30 days after receiving this letter. Your written comments are welcome, but they are not
mandatory.
Summary of Changes for Renewal 2023.
1. continued potable water treatment plant (WTP) strategy(2012), quarterly monitoring for
Total Manganese as required of greensand filter treatment technology
2. continued Total Nitrogen/Total Phosphorus (TN/TP)monitoring semi-annually, per
Neuse River Basin Nutrient Management Guidelines.
3. this facility not eligible for WTP General Permit NCG590000 because TN/TP
monitoring is required
4. updated site map and the Supplement to Permit Cover Sheet narrative.
The NPDES standard conditions (Parts II, III, and IV), are part of this permit but are not included in
this draft document(cover, map, and Part I). The latest version of Parts II, III, and IV are available
at https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file.
North Carolina Department of Environmental Quality I Division of Water Resources
jg�g 512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617--919.707.3616

Luther H. Lewis,Jr.,Mayor
Town of Middlesex
February 2024
Page 2
Following the mandatory 45-day public-comment period, the Division will review all pertinent
comments, if any, and take appropriate action prior to issuing an NPDES permit final. If you have
questions concerning this draft,please e-mail the undersigned [e-mail]].
Respectfully,
Joe . Corpo on, P.O.
N EQ/D /NPDES Permitting
Enclosure: NPDES Permit NC0087840 (renewal DRAFT)
ec: NPDES Program Files;Central Files [Laserfiche]
ATB,Molly Nicholson[[e-mail]]
RRO,Vanessa Manuel[[e-mail]]
OCU,Jeffery Talbott [e-mail]]
WTP Operator,W.Lamm[[e-mail]]

NPDES Permit NCO087840
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
In compliance with the provisions of North Carolina Genera Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the o h Carolina Environmental
Management Commission, and the Federal to Pollution n of Act, as amended, the
Town of i dl hex
is hereby authorized to disch r ted was w er from a facility known as
Middlesex W5elLNNo. 4 at t ent Plant (WTP)
10 -E Fin re e , iddlesex
as Aunty
C
to receiving wat s esignated a d butary(UT) to Turkey Creek within the Neuse River
Basin, in accordan th effluen li itations, monitoring requirements, and other conditions set
forth in Parts I, II, III, n IV here f
The permit shall become effec ive, .... . . .....1 2023.
This permit and the authorization to discharge shall expire at midnight on April 30, 2028.
Signed this day . . . . . . . . . . ... . ...1 2023.
John E. Hennessy, Section Chief
Water Quality Regional Operations
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 6

NPDES Permit NCO087840
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 described herein.
Town of Middlesex
is hereby authorized to:
1. continue to operate a filter-backwash treatment st emplo ' g reensand filter technology to
treat groundwater in support of potable-water reduction(design flow 0.133 MGD), generating a
backwash discharge averaging 0.0034 MGD c per w ] utilizin9�)
• raw water [pumped from a singl ell— 18 m]
• disinfection system(chlorinatio in odium h o hlorite)
• two (2) each, circular 6 ft-diam e gr sa filte to s
• potable water air-stripper ystem
• one (1) flow met for filter ackw d' charge
• two (2) each, 8 x�6 ft w�st water ng beds
• tablet dechlorinatio
these facilitie o e h i le x WelNo. 4,potable Water Treatment Plant(WTP), 10921
East Finch S e t, Middles ash o ty, and
2. discharge from said treatment works via Outfall 001, at a location specified on the attached map,
to an unnamed tributary(UT)to Turkey Creek [Stream Segment 27-86-3-(1)], a waterbody
currently classified C; NSW within Hydrological Unit 03-04-07 [HUC: 030202030104] of the
Neuse River Basin.
Page 2 of 6

NPDES Permit NCO087840
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[NCAC 02B.0400 et seq., 02B.0500 et seq.] WPCS Class PC-1[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 filter backwash via Outfall 001. Such discharges shall be limited,monitored and
reportedl by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTIC Monthly Daily Measurement Sample Sample
[PARAMETER CODES]
Average Maximum Frequency Type Location
Flow 2 50050 2/Mon Instantaneous Effluent
Total Suspended Solids C0530 30.0 mg/L 5.0 mg/L 2/Mon1h Grab Effluent
Total Residual Chlorine 50060 17 µg/L 3 2/Month Grab Effluent
pH [standard units] 00400 < or>9. 2/Month Grab Effluent
Turbidity(mg/L) 00070 2/Month Grab Effluent
Total Manganese(µg/L) 01055 Quarterly Grab Effluent
Total Nitrogen(TN)4(m ) C0610 Semi-annually Grab Effluent
Total Phosphorus (TP) (mg/L) C0665 Semi-annually Grab Effluent
Footnotes: /
1. Beginning fr m he permit e e tive ,the Permittee shall report monthly discharge monitoring
data electronic rising the C WR's Electronic Discharge Monitoring Report(eDMR)internet
application [See Secti n A. ( .) or eDMR submittal requirements].
2. Flow: Permittee shall ec b th flow rate and flow duration in log books; logs to be kept onsite
available for DWR insp f ; Permittee shall report Total Daily Discharge in all monthly
DMRs/eDMRs.
3. The Division shall consider compliant all TRC effluent values reported below 50 µg/L. However,
the Permittee shall continue to record and submit all values reported by North Carolina-certified
test methods(including field certified),even if these values fall below 50 µg/L.
4. TN=TKN+NO3-N+NO2-N,where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and
NO3-N+NO2-N are Nitrate and Nitrite Nitrogen,respectively.
Conditions:
• All effluent samples shall accurately represent the physical and/or chemical character of the discharge.
• The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
• There shall be no discharge of wastes or chemicals unrelated to responsible treatment of raw water.
Page 3 of 6

NPDES Permit NCO087840
A. (2.) 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. Reyorfin2 Requirements [Supersedes Sectio 2. LSectiona
The permittee shall report discharge monttonng da el tronically using the NC DWR's
Electronic Discharge Monitoring Re e R) inte e pplication.
Monitoring results obtained during the p e 'ous on s be summarized for each month
and submitted electronica using eDMR. e MR em allows permitted facilities to enter
monitoring data and su i DM ectron'ca using the internet. Until such time that the
state's eDMR applicatio is omp 'a t with 's Cross-Media Electronic Reporting Regulation
(CROMERR),permittees 'll re ire o s b it all discharge monitoring data to the state
electronically u 'ns eDM an w' 1 be r it o complete the eDMR submission by printing,
signing, and
fitting a ign ginal and a copy of the computer printed eDMR to the
following
NC DEQ/Divisi of Water e ources/Water Quality Permitting Section
ATTENTION: Cen a iles
1617 Mail Service Ce r
Raleigh,North Carolina 9-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting requirements
may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1,
1.1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be
submitted to the mailing address above. See "How to Request a Waiver from Electronic
Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month
following the issuance of the permit or in the case of a new facility, on the last day of the month
following the commencement of discharge.
Page 4 of 6

NPDES Permit NC0087840
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 i entify the initial recipient at the
time of each electronic submission. The permittee sho ld use the EPA's website resources to
identify the initial recipient for the electronic submi io
Initial recipient of electronic NPDES informa 'o rom NPDES-r� u ted facilities means the
entity(EPA or the state authorized by EPA to implement e NPD gram)that is the
designated entity for receiving electronic NPDES dd a e 40 CFR 12 (b)].
EPA plans to establish a website that w' a o link to he ppropriate electronic reporting tool for
each type of electronic submission an f e h te. In t tions on how to access and use the
appropriate electronic reporting tool wil b ava' b Z Information on EPA's NPDES
Electronic Reporting Rule is found at:
htt s://www.federalre ister. ov/documents /10/22/ 015-24954/national- ollutant-
dischar e-elimination-system-n des electro 'c e ortin -rule
Electronic submissions mus"'tart by the da s "s d in the "Reporting Requirements" section
above.
3. How to Re u t Waiver f Elec onic Re ortin
The permittee ma e a tem o ary electronic reporting waiver from the Division. To obtain an
electronic reporting w i r, p rmittee must first submit an electronic reporting waiver request
to the Division. Reques o emporary 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:
hqp:Hdeq.nc.gov/about/divisions/water-resources/edmr
Page 5 of 6

NPDES Permit NC0087840
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. (I I.)(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 D using the state's eDMR system shall
make the following certification [40 CFR 122.22]. O T E STATEMENTS OF
CERTIFICATION WILL BE ACCEPTED:
7 certify, under penalty of law, that this doc ent and al ttachm is ere prepared under my
direction or supervision in accordance with a s�stem d si ed to ass u hat qualified personnel
properly gather and evaluate the info tion submitted ased on my inquiry of the person or
persons who manage the system, or t o ons dir t responsible for gathering the
information, the information submitte i h st of owledge and belief, true, accurate,
and complete. I am aware that there ar i nifi t alti or submitting false information,
including the possibility of nes d impr' en ing violations."
5. Records Retention [Supplements Section D. ME
The permittee shal tain re ords of a Monitoring Reports, including eDMR
submissions. e co s o o 'es sha e aintained for a period of at least 3 years from the
date of the repo This peri d m extended by request of the Director at any time [40 CFR
122.41].
Page 6 of 6

8a';dy�t111Ra
NC Hwy 264
N. Nash Street
P�1i rnlesex
Ayf,
Y
Outfall 001
iJ
a,, 7
UT to Turkey Creek
(flows SE)
.�.s I
'PI
Turkey Creek
(flows SE)
hoof Rd
U
r
� U
National Geographic.E5ri.Garmin.HERE.UNEP-WCMCI
Town of Middlesex Facility
Middlesex Well No. 4 WTP Location
Latitude: 351 47'15"N Longitude: 78'11'42"W not to scale
Stream Class: C;NSW Receiving Stream: UT to Turkey Creek
Stream Segment: 27-86-3-(1) HUC: 030202030104
Drainage Basin: Neuse River Basin Sub-Basin: 03-04-07 NPDES Permit NCO087840
USGSOuad: Middlesex,NC INorth
Nash County