NC0083101_Draft Permit_20230517

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHAM E. ROGERS, JR.
Director
Terrell Blackmon
City of Henderson
PO Box 1434
Henderson, NC 27536-1434
Dear Mr. Blackmon:
\f QaAi'i Na j
NORTH CAROLINA
Environmental Quality
May 17, 2023
Subject: Draft NPDES Permit NCO083101
Kerr Lake WTP
Grade I PC WPCS
[I 5A NCAC 08G .0306]
Vance County
Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft
very carefully to ensure thorough understanding of the conditions and requirements it contains.
Your permit is among several in the Roanoke River Basin that the Division has targeted for
expedited renewal.
This draft contains the following changes from the existing permit:
Section A(4.) has been updated to be consistent with current federal requirements for
electronic reporting.
Section A (3.) was updated to include latest language for toxicity testing requirements.
Review of data from the last permit cycle demonstrated no reasonable potential for the
exceedance of water quality limits for fluoride. Therefore, the limit for Fluoride has been
removed, and monitoring has been reduced to quarterly.
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 is available at https://bit.ly/2BZ4xxx 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 Vance 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 Q ,fJ North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA (J1(�.'�O'�.(�OQO
Department of Emlmnmenfal Duali�

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 [e-mail]].
Sincerely,
Emily Richards
Environmental Specialist II
NPDES Program
ec: NPDES files
Raleigh Regional Office
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA 919.707.9000
Depanmem of Envlmnmenml Dual

NPDES Permit NCO083101
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 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 Henderson
is hereby authorized to discharge wastewater from a facility located at the
Kerr Lake Regional Water Treatment Plant (WTP)
280 Regional Water Lane, Henderson 27536
Vance County
to receiving waters designated as an unnamed tributary to Anderson Swamp Arm of Kerr Lake in the
Roanoke 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 March 31, 2027.
Signed this day DRAFT
Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

NPDES Permit NCO083101
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.
City of Henderson
is hereby authorized to:
1. continue to operate a wastewater treatment system utilizing conventional water treatment plant
technology [coagulation, flocculation, sedimentation, and filtration] with a current maximum,
monthly average wastewater discharge of 0.020 MGD from media filter backwash and
sedimentation basins with a design potable flowrate of 10 MGD;
located at the Kerr Lake Regional WTP, 280 Regional Water Lane, Henderson, Vance County.
Treatment components include:
2. discharge from said treatment works via Outfall 001, at the location specified on the attached map
into an unnamed tributary to Anderson Swamp Arm of Kerr Lake [23-8-6-(1.5)], a waterbody
classified WS-III, B; CA located within Subbasin 03-02-06 [HUC: 030101021001] of the Roanoke
River Basin.
Page 2 of 7

NPDES Permit NCO083101
PART I
A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash from outfall 001. Such discharges shall be limited,
monitored and reported' by the Permittee as specified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS'
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTIC
[PARAMETER CODES]
Average
Maximum
Frequency
Type
Location
Flow (MGD)
50050
Continuous
Recording
Effluent
Total Suspended Solids (TSS) (mg/1)
C0530
30 mg/1
45 mg/1
Weekly
Grab
Effluent
Turbidity 2 (NTU)
00070
25 NTU
25 NTU
Weekly
Grab
Effluent
pH (su)
00400
Not < 6.0 or > 9.0
standard units
Weekly
Grab
Effluent
Total Residual Chlorine 3 (µg/1)
50060
F17 µg/l
Weekly
Grab
Effluent
Total Fluoride (mg/1)
00951
Monitor & Report
Quarterly
Grab
Effluent
Hardness - Total as
4
00900
Monitor & Report
Quarterly
Grab
Effluent
[CaCO3 or (Ca + Mg)] (mg/L)
Total Zinc (µg/1) 4
01092
Quarterly
Grab
Effluent
Total Aluminum (µg/1)
01105
Quarterly
Grab
Effluent
Total Nitrogen (mg/1) 5
C0600
Monitor & Report
Quarterly
Grab
Effluent
Total Phosphorus (mg/1)
C0665
Monitor & Report
Quarterly
Grab
Effluent
Chronic WET Testing 6
TGP3B
Quarterly
Grab
Effluent
Footnotes:
1. Submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Condition A. (4.).
2. Turbidity — Effluent turbidity shall not cause receiving -stream turbidity to exceed 25 NTU. If background turbidity
naturally exceeds 25 NTU, the effluent shall not cause background turbidity to increase. Any discharge exceeding this
permit limit will require sufficient instream sampling (upstream and/or downstream) to verify compliance (effluent vs.
background)." [NCAC 02B. 0211(21)]
3. 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 test method (including
field certified), even if these values fall below 50 µg/L.
4. Effluent hardness sampling should be performed in conjunction with sampling for hardness dependent metals (Zinc).
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 WET testing (Ceriodaphnia dubia) 7-day pass/fail test at 90% in January, April, July and October. See condition
A. (3.).
Conditions:
• Samples shall be taken at the outfall but prior to mixing with the receiving waters.
• There shall be no discharge of floating solids or foam visible in other than trace amounts.
Page 3 of 7

NPDES Permit NCO083101
A. (2.) PERMIT RE -OPENER: WHOLE EFFLUENT TOXICITY
[G.S. 143-215.1(b)]
Whole Effluent Toxicity monitoring results indicating aquatic toxicity may result in the Division of
Water Resources re -opening this permit, or requesting by letter that further action be taken. Additional
metals testing, a toxicity identification evaluation, a toxicity reduction evaluation, and/or an
assessment of discharge treatment alternatives may be requested.
A. (3.) CHRONIC TOXICITY PASS/FAIL MONITORING ONLY (QUARTERLY)
[15A NCAC 02B .0500 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 and 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 TGP3B.
Additionally, DWR Form AT-1 (original) is to be sent to the following address:
Attention: 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.ATBkncdenr.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.
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.
Page 4 of 7

NPDES Permit NCO083101
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. (4.) 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)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.
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.
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:
Page 5 of 7

NPDES Permit NC0083101
• 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: hM2s://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.
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:
hqp:Hdeq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.)
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
Page 6 of 7

NPDES Permit NC0083101
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. "
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 ].
Page 7 of 7

J
�� J'
�')Satterwhite
. Point Anderson Swamp Arm of Kerr Lake , r
Outfa11001 N
-, [flows west]
A
Approximate
Facility Boundary
S
o
Regional Water Ln
_""Ce _
IA
h ,
Op
-J n�inF Ch
City of Henderson - Kerr Lake Regional WTP
N
NPDES Permit NCO083101
280 Regional Water Lane, Henderson 27536
Receiving Stream: UT to Anderson Swamp Arm of Kerr Lake
Stream Segment: 23-8-6-(1.5) Stream Class: WS-III,B;CA
River Basin: Roanoke Sub -Basin #: 03-02-06
County: Vance HUC: 030101021001
SCALE
1:24,000
36.435278° N,-78.355278° W
NC Grid: B25NE
USGS Quad: Middleburg, NC