NC0087491_Draft Permit_20241112

ROY COOPER . r
Governor
MARY PENNY KELLEY
Secretary *"
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
November 12,2024
Erick Jennings
Beaufort County Water District VI
111 West Second Street
Washington,NC 27889
Subject: Draft of NPDES NC0087491
Chocowinity/Richland Township WTP
Grade I Physical Chemical
Beaufort 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. I
This draft contains the following major changes from the existing permit:
• The maximum monthly average discharge has been updated in the Supplement to Permit Cover Sheet.
• A flow limit has been added to section A.(1.).
• The parameter of"Duration of Flow"has been added to section A.(1.).
• The contact information in Section A. (3.)for the aquatic toxicology branch has been updated.
• The permit map has been updated.
Please note that this section of Pamlico River is listed as an impaired waterbody on the North Carolina 303(d)
Impaired Waters List. Addressing impaired waters is a high priority with the Division,and instream data will
continue to be evaluated. If there is noncompliance with permitted effluent limits and stream impairment can be
attributed to your facility,then mitigative measures may be required.
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 Beaufort 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: 1 ,,
I'
D 4) si2Northsausbsteetii6IwafiseiecterI0 NorthCarolina Department of EnvironmentalQuality I DNIslonofWaterResoes, v7 Raklyh North Carolina 276991617
to N /'° 919.707.9000

Sara Bassett
Environmental Specialist I
NPDES Compliance and Expedited Permitting
cc: NPDES files [Laserfiche]
Washingon Regional Office [Laserfiche]
Operator Certification Program [Laserfiche]
Aquatic Toxicology

NPDES Permit NC0087491
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,
Beaufort County Water District VI
is hereby authorized to discharge wastewater from a facility located at the
Chocowinity/Richland Township Water Treatment Plant
116 Windmill Road, Chocowinity
Beaufort County
to receiving waters designated as the Pamlico River in the Tar-Pamlico 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 November 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 June 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 NC0087491
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.
Beaufort County Water District VI
is hereby authorized to:
1. continue to discharge filter backwash and softener regeneration wastewaters from an ion exchange
water treatment plant (WTP) with a design potable flowrate of 1.800 MGD and a maximum,
monthly average wastewater discharge of 0.067 MGD, with wastewater treatment consisting of;
• a holding tank,
• dechlorination (calcium thiosulfate)
• a 10-ft diffuser
• sludge drying beds
• solids settling tank
located at the Chocowinity/Richland Township Water Treatment Plant at 116 Windmill Road in
Beaufort County; and
2. discharge from said treatment works via Outfall 001, at the location specified on the attached map
into the Pamlico River [29-(5)] currently classified SB; NSW waters in subbasin 03-03-07 [HUC:
030201040109] of the Tar-Pamlico River Basin.
Page 2 of 8

NPDES Permit NC0087491
PART I.
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 seq.]
Grade I Physical Chemical Water Pollution Control System [15A NCAC 08G .0302]
Beginning with the effective date of this permit and lasting until expiration, the Permittee is authorized to
discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored) by the
Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS 1
CHARACTERISTICS
Parameter codes Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow 50050 0.077 Once per Instantaneous Effluent
Discharge
Duration of Flow(Hours) 81381 Monitor and Report Once per Calculated Effluent
Discharge
Total Suspended Solids(TSS) C0530 30.0 mg/L 45.0 mg/L 2/Month Composite Effluent
Total Residual Chlorine(TRC)2 50060 13 µg/L 2/Month Grab Effluent
>6.8 and<8.5
pH(su) 00400 2/Month Grab Effluent
standard units
Salinity(ppth) 00480 Monitor&Report Monthly Composite Effluent
Conductivity(µmhos/cm) 00095 Monitor&Report Monthly Composite Effluent
Total Dissolved Solids(TDS) 70295 Monitor&Report Monthly Composite Effluent
Turbidity(ntu) 00070 Monitor&Report Monthly Grab Effluent
Total Chloride(mg/I) 00940 Monitor&Report Monthly Composite Effluent
Ammonia Nitrogen(mg/1) C0610 Monitor&Report Monthly Composite Effluent
Nitrate/Nitrite Nitrogen C0630 Monitor&Report Quarterly Composite Effluent
(NO2+NO3)(mg/1)
Total Kjeldahl Nitrogen(TKN)(mg/I) C0625 Monitor&Report Quarterly Composite Effluent
Total Nitrogen(TN) C0600 Monitor&Report Quarterly Calculated Effluent
(NO2+NO3+TKN)(mg/1)
Total Phosphorus(TP)(mg/1) C0665 Monitor&Report Quarterly Composite Effluent
Whole Effluent Toxicity 3 TGP3E Monitor&Report Quarterly Composite Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see Section A. (4.)].
2. Total Residual Chlorine monitoring is required only if chlorine or a chlorine derivative is added during the
treatment process. 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 pig/L.
3. Chronic Toxicity Monitoring of Mysidopsis bahia at 2.8% during the months of March,June, September, and
December. See Special Condition A. (3.)
Conditions:
• All samples collected shall be of a representative discharge.
Page 3 of 8

NPDES Permit NC0087491
• There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) NUTRIENT REDUCTION REQUIREMENTS
[G.S. 143-215.1(b)]
Dischargers to the Tar-Pamlico River are subject to the requirements, terms, and conditions of the Tar-
Pamlico Nutrient Sensitive Waters (NSW) Implementation Strategy: Phase III adopted April 14, 2005.
Non-members of the Tar-Pamlico Association will maintain or receive permit effluent limits for Total
Nitrogen and for Total Phosphorus concentrations as defined in the Strategy. Any revisions to the
Strategy during the life of this permit are applicable.
If requirements other than those listed in this permit are adopted as part of a revision to the Strategy, the
Division reserves the right to reopen this permit and include those requirements.
If requirements other than those listed in this permit are adopted to prevent localized adverse impacts to
water quality, the Division reserves the right to reopen this permit and include those requirements.
A. (3.) CHRONIC TOXICITY PASS/FAIL PERMIT MONITORING (QUARTERLY)
[15A NCAC 02B .0200] [15A NCAC 02B .0500 et seq]
The effluent discharge shall at no time exhibit observable inhibition of growth or significant mortality to
Mysidopsis bahia at an effluent concentration of 2.8%.
The permit holder shall perform at a minimum, quarterly monitoring using procedures described below
to establish compliance with the permit condition. 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. The test procedure will be based on EPA Method 1007.0, Mysid,
Mysidopsis bahia, Survival, Growth, and Fecundity Test, as described in Short-Term Methods for
Estimating the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms,
Third Edition, EPA-821-R-02-014. The procedure will be performed as written with the following
exceptions:
• The test treatments will consist of a control and a 2.8% effluent concentration.
• Mortality for pass/fail tests will be evaluated using the t test described in Section 11.3 in Methods
for Measuring the Acute Toxicity of Effluents to Freshwater and Marine Organisms, Fifth
Edition. EPA-821-R-02-012, October 2002, applying an alpha level of 0.05.
• The growth endpoint for pass/fail tests will be determined using Appendix G of Short-Term
Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Marine and
Page 4 of 8

NPDES Permit NC0087491
Estuarine Organisms, Third Edition, EPA-821-R-02-014, October 2002, applying an alpha level
of 0.01.
• Mortality and growth endpoints for multiple-concentration tests will be determined using
hypothesis testing as described in EPA Method 1007.0, Mysid, Mysidopsis bahia, Survival,
Growth, and Fecundity Test, as described in Short-Term Methods for Estimating the Chronic
Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms, Third Edition,
EPA-821-R-02-014, October 2002.
• Fecundity will not be evaluated.
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. For pass/fail results, report
using the parameter code TGP3E. Additionally, DWR Form AT-4 (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.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.
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. 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 5 of 8

NPDES Permit NC0087491
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival, minimum control organism growth, 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 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://deq.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.
Page 6 of 8

NPDES Permit NC0087491
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
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:
Page 7 of 8

NPDES Permit NC0087491
http://deq.nc.gov/about/divisions/water-resources/edmr
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. (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
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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Chocowinity/Richland Township WTP1 NPDES Permit
Receiving Stream: Pamlico River Stream Index: 29-(5)
Drainage Basin: Tar-Pamlico Sub-Basin: 03-03-07 NC0087491
Latitude: 35°28'18.8"N Longitude: 76°58'54.1"W Beaufort County
Stream Class: SB; NSW HUC: 030201040109 North