NCG590044_Certificate of Coverage (COC)_20240222

DocuSign Envelope ID: 2E575362-5B54-491 C-A818-62885419B543
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGEM, JR.
Director
NORTH CAROLINA
Environmental Quality
2/22/2024
City of Winston-Salem
Attn: William Brewer,
PO Box 2511
WTP Superintendent
Winston-Salem, NC 27107
Subject: General Permit No. NCG590000
Certificate of Coverage NCG590044
R.A. Thomas WTP
Forsyth County
Dear Mr. Brewer:
General Permit Coverage. In accordance with your application for discharge, the Division is
forwarding herewith the subject Certificate of Coverage to discharge under the subject state-
NPDES general permit. This permit is issued pursuant to the requirements of North Carolina
General Statue 143-215 .1 and the Memorandum of Agreement between North Carolina and the
US Environmental Protection agency dated October 15, 2007 (or as subsequently amended).
The following information is included with your permit package:
■ A copy of the Certificate of Coverage for your discharge with a Supplement
■ A copy of General Wastewater Discharge Permit NCG590000
■ A copy of a Technical Bulletin for the General Wastewater Discharge Permit NCG590000
If any parts, measurement frequencies or sampling requirements contained in this general permit
are unacceptable to you, you have the right to request an individual permit by submitting an
individual permit application. Unless such demand is made, the certificate of coverage shall be
final and binding.
Please take notice that this Certificate of Coverage (CoC) is not transferable except after notice to
the Division of Water Resources. The Division of Water Resources may require modification or
revocation and reissuance of the certificate of coverage. 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 permits that may be required.
Certificate of Coverage Supplemental Information and DMR (eDMR) submittals:
The Supplement page attached to the CoC outlines the facility's Water Treatment Plant (WTP)
type, discharge flow volume, receiving stream class & supplemental classifications (ie. Trout
Class, NSW), and the Whole Effluent Toxicity testing requirements, if applicable. Most important,
the Supplement to CoC page identifies the specific Effluent Limitations and Monitoring
Requirements sheet your facility is subject to comply with, Section B. (L) through B. (4.). Changes
made to the water purification process, the wastewater treatment process, or chemical usages at
D E Q v North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
NOHn I CAROL INA � 919.707.9000
Dowooeot of E,i,onmenlal Quali�

DocuSign Envelope ID: 2E575362-5B54-491 C-A818-62885419B543
the facility require that the permittee notify the Division in writing. Such notifications shall be sent
to the DWR/ NPDES Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617.
All facilities are required to submit monthly Discharge Monitoring Reports and the permittee shall
submit discharge monitoring reports electronically using the NC DWR's eDMR application
system. The permittee shall list its Certificate of Coverage number shown in the subject heading
of this letter, as its NPDES Permit Number on the DMR (eDMR). Please see Section C in the
general permit for more information on Electronic Reporting of Discharge Monitoring Reports
and where to send the signed forms.
The Permittee is expected to construct any wastewater treatment facilities necessary to provide
adequate treatment in order to comply with State Water Quality Standards and permit limitations
set forth in this general permit. It is not necessary to obtain an Authorization to Construct from the
Division for wastewater treatment systems at WTPs per Session Law 2011-394 adopted on July 1,
2011.
NPDES Permit Contact. If you have any questions concerning the requirements of this permit,
please contact Sydney Deuterman via email at.sydney.deutermangdeq.nc.gov.
Sincerely,
DocuS,i�gned by:
8328B44CE9EB4A1...
John Hennessy
NC Division of Water Resources
cc: NPDES General Permit Files / CoC NCG590044 [Laserfiche]
Winston-Salem Regional Office [Laserfiche]
Operator Certification Program

DocuSign Envelope ID: 2E575362-5B54-491 C-A818-62885419B543
CoC NCG590044
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
CERTIFICATE OF COVERAGE NCG590044
GENERAL PERMIT NO. NCG590000
TO DISCHARGE WASTEWATERS FROM GREENSAND OR CONVENTIONAL TYPE WATER
TREATMENT PLANTS AND OTHER DISCHARGES WITH SIMILAR CHARACTERISTICS
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,
City of Winston-Salem
is hereby authorized to discharge wastewater from a greensand water treatment facility designed to treat
and discharge—0.0034 MGD from a facility located at
R.A. Thomas Water Treatment Plant (WTP)
1201 S. Martin Luther King Jr. Dr.
Winston-Salem
Forsyth County
to receiving waters designated as an unnamed tributary to Salem Creek in the Yadkin Pee -Dee River Basin
in accordance with the effluent limitations, monitoring requirements, and other application conditions set
forth in Parts I, 11, III, and IV of General Permit NCG5900000 as attached.
This Certificate of Coverage shall become effective April 1, 2024
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day February 22, 2024
DOCUSC'i/gned by:
8328B44CE9EB4A1...
John Hennessy
Division of Water Resources
By Authority of the Environmental Management Commission
Pagel of 2

DocuSign Envelope ID: 2E575362-5B54-491 C-A818-62885419B543
CoC NCG590044
SUPPLEMENT to CoC
In accordance with the NCG590000 General Permit and the information provided in the permittee's
application, this facility should use the information below to determine what Effluent Limitations and
Monitoring Requirements it is subject to in the NCG590000 General Permit. The Permittee is required to
notify the Division of any modifications made to the water purification process, the wastewater treatment
processes, and/or usage of chemicals at the plant. This notification should be made in writing to the
DWR/NPDES Unit and a modified CoC issued if necessary.
1. Type of Water Purification System identified: Greensand X Conventional
2. Design Flow (MGD): 0.6514
3. Receiving Stream Classification: C
4. Effluent Limitations and Monitoring Requirements Permittee is subject to in this General Permit:
GREENSAND WTP discharging to FRESHWATER [See Part 1, Section B. (1)]
GREENSAND WTP discharging to SALTWATER [See Part 1, Section B. (2)]
X CONVENTIONAL WTP discharging to FRESHWATER [See Part 1, Section B. (3)]
CONVENTIONAL WTP discharging to SALTWATER [See Part 1, Section B. (4)]
All facilities are required to submit monthly Discharge Monitoring Reports and the permittee shall submit
discharge monitoring reports electronically using the NC DWR's eDMR application system. Please see
Part 1, Section C for eDMR information.
For Conventional WTPs:
5. This facility is required to perform annual Whole Effluent Toxicity Testing as shown below:
X Chronic WET test [See Part 1, Section D. (2)]
or
Acute WET test [See Part 1, Section D. (3)]
Using an effluent concentration of 90 % and the following
Test organism: X Ceriodaphnia dubia Mysidopsis Bahia Fathead Minnow
Page 2 of 2

DocuSign Envelope ID: 2E575362-5B54-491 C-A818-62885419B543
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Stream Index: 12-94-12-(4) Latitude: 36' 05' 13.0" N
River Basin: Yadkin Pee -Dee Sub -Basin: 03-07-04
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