NC0089265_Draft Permit_20240514

ROY COOPER
Governor AML
ELIZABETH BISER
Secretary /
RICHARD E. ROGERS, JR •tea,,,,,.•
Director
NORTH CAc10,INA
Environmental Quality
May 15, 2024
Jeff Sedlacek, Town Manager
Town of Dobson
PO Box 351
Dobson, North Carolina, 27017
Subject: Review of Permit DRAFT
NPDES NC0089265, Class PCNC
Dodson Water Treatment Plant (WTP)
2604 Prison Camp Road, Dodson
Surry County
Mr. Jeff Sedlacek:
Having received your renewal request for the subject permit (July 10, 2023), the Division of
Water Resources (DWR or the Division) hereby transmits a renewal draft for your review and
comment. Please review it carefully to ensure your understanding of the permit limits and
monitoring requirements, 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 Surry County area, as required
by the NPDES Program. Please provide your written comments, if any, to DENR / DWR /
NPDES Program no later June 18, 2024 (approximately 30 days after receiving this document).
Your written comments are welcome, but they are not mandatory.
RENEWAL STRATEGY — Previous renewals have applied the current permitting strategy for
conventional WTPs. Following Dobson's relocation of Outfall 001 to mainstem Fisher River, the
Division understands that the Town of Dobson (Dobson) has established a new effluent database,
and DWR has reviewed these data for renewal.
Summary of Renewal Changes:
1. Acute WET -Testing Replaces Chronic WET - Considering Dobson WTP's relocated
outfall to the Fishing River main stem, DWR renews this permit with Acute Toxicity
PASS/FAIL, Limited [TGE6C], using Fathead Minnow (Pimephales promelas), 24-hour
static test at an effluent concentration of 90%, in accord with current WTP permitting
Guidance [section A. (2.)].
2. Total Copper database no longer shows reasonable potential [32 samples] to exceed its
surface water -quality standard (values detected average less than 50% allowable). However,
because Dobson adds copper sulfate during treatment, Total Copper remains a parameter of
concern, and monitoring continues Quarterly without permit limits [see A. (1.)].
3. The Permittee no longer adds fluoride (Application, pg. 21), therefore Fluoride
monitoring has been discontinued [see A. (1.)].
4. Electronic Reporting language and requirements have been updated [see A. (3.)].
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 - 919.707.9000

Jeff Sedlacek, Town Manager
Town of Dobson
Permit Renewal - Draft Review 2024
Page 2 of 2
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/3k5NFaL and can be viewed online or downloaded as a PDF file.
General Permit NCG590000 (G59) Eligibility — With the relocation of the Outfall 001, Dobson
WTP must comply with new WET test conditions [TGE6C]. Therefore, Dobson WTP is not
currently eligible for General Permit NCG590000, in accordance with current WTP permitting
Guidance.
Sincerely,
f�
Joe Corporo .G.
DE / DWR / NPDES Pennitting Unit
Enclosure: NPDES Permit NCO089265 (renewal draft)
Attachments: WTP General Permit NCG590000
ec: NPDES Program Files [Laserfiche]
WSRO, Gary Hudson [[e-mail]]
WSRO, Jenny Graznak [[e-mail]]
DWR/OCU, Jeffery Talbott [e-mail]]
ATB, Molly Nicholson [[e-mail]]
DOBSON, Michael Frazier [[e-mail]], ORC — Public Works Director

Permit NCO089265
WTP Class PCNC
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
Town of Dobson
is hereby authorized to discharge wastewater from a facility located at the
Dobson Water Treatment Plant (WTP)
2607 Prison Camp Roaa;,�Pobson
Surry County
to receiving waters designated as an unnamed tributary (UT) to Fisher River in the Yadkin -Pee Dee
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 , 2024.
This permit and authorization to discharge shall expire at midnight on December 31, 2028.
Signed this day 12024.
John E. Hennessy, Section Chief
Water Quality Regional Operations
Division of Water Resources
By order of the Environmental Management Commission

Permit NCO089265
SUPPLEMENT TO PERMIT COVER SHEET
As of this permit issuance, any previously issued permit bearing this number is no longer effective. All
previous NPDES Permits issued to this facility, whether for operation or discharge, are hereby
revoked. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
The Town of Dobson
is hereby authorized to:
1. continue to operate wastewater -treatment to produce potable water employing conventional
treatment technology [coagulation, flocculation, sedimentation, filtration and disinfection]
to treat raw surface water at a design flow of 0.066 MGD, generating a wastewater
discharge at 0.057 MGD [highest monthly average], utilizing facilities consisting of;
• pond - raw -water impoundment [additive ,7 copper sulfate]
• flash mixing tank [additive — alttrn; lime]
• flocculation tank
• sedimentation
• filter backwash/rewash (using potable water)
• chlorination / floridiation
these facilities located at the'RobZ on'�V`)<'P, 2706 Prison tamp Road, Dobson, Surry County; and
2. discharge from said treatment works via Outfall 001 to the main -stem Fisher River; stream
segment 12-63-(9)], a wateibody currently classified C waters within hydrological unit 03-07-
02 [HUC: 03040101 ] of the Yadkin -Pee Dee River Basin.
Page 2 of

Permit NCO089265
Part I
A. (I.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[NCAC 0213.0400 et seq., 0213.0500 et seq.] [15A NCAC 08G .0302 - WPCS Class PCNC]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge conventional WTP wastewater from Outfall 001. Such discharges
shall be limited, monitored, and reported t by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
PARAMETER CODES
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
T
Sample
Location
Flow (MGD)
50050
Instantaneous
Recording
Effluent
Total Suspended Solids
00530
30.0 mg/L
45.0 mg/L
VMonth
Grab
Effluent
pH (Standard Units)
00400
Not < 6.0 or > 9.0 sm.
2/Month
Grab
Effluent
Total Residual Chlorine 2 (TRC)
50060
17 µg/L
2/Month
Grab
Effluent
Turbidity'
00070
50 ntu
2/M nth
Grab
Effluent
Hardness (as CaCO3)
00900
Monthly,
Grab
Effluent
Total Copper (mg/L)
01042
Quarterly
Grab
Effluent
Aluminum (mg/L)
0 I o
Quarterly
Grab
Effluent
Total Nitrogen 4 (mg/L)
C06601\`
Quarterly
Grab
Effluent
Total Phosphorus (mg/L)
C0665
^ Quarterly
Grab
Effluent
Whole Effluent Toxicity (WET)
ACUTE 5
TGE6C
Limited s
Quarterly
Grab
Effluent
Footnotes:
1. The Permittee shall submit discharge Mpn}toriig Reports electronically using DWR's eDMR
submittal system [See Section A."(�.)]. i
2. TRC limit and monitoring apply only if facility adds chlorine or chlorine derivatives to filter backwash
water. The Division shall consider compliant all effluent TRC values reported below 50µg/L. However,
the Permittee shall continue to submit all values reported by North Carolina -certified test methods
(including field certified), even if these values fall below 50µg/L.
3. Receiving waterbody is impaired for Turbidity. Exceeding this permit limit requires instream monitoring
sufficient to establish compliance (effluent vs. background). If receiving -stream background exceeds 50
ntu, effluent turbidity shall not cause background to increase.
4. TN = (NO2-N + NO3-N) + TKN, where (NO2-N + NO3-N) and TKN are Nitrite/Nitrate nitrogen
and Total Kjeldahl Nitrogen respectively.
5. WET -Testing as Acute Toxicity PASS/FAIL, Limited [TGE6C], using Fathead Minnow (Pimephales
promelas), 24-hour static test at 90% effluent concentration [during the months of February, May,
August, and November [see A. (2.)].
Condition: The Permittee shall discharge no floating solids or foam visible in other than trace
amounts.
Page 3 of

Permit NCO089265
A. (2.) ACUTE TOXICITY PASS/FAIL - PERMIT LIMITED
[ 15A NCAC 02B .0200 et seq.]
The Permittee shall conduct acute toxicity tests Quarterly using protocols defined in the North Carolina
Procedure Document entitled "Pass/Fail Methodology for Determining Acute Toxicity in A Single Effluent
Concentration" (Revised December 2010, or subsequent versions).
The monitoring shall be performed as a Fathead Minnow (Pimephales promelas) 24-hour static test. The
effluent concentration at which there may be at no time significant acute mortality is 90% (defined as treatment
two in the procedure document). The tests will be performed during the months of February, May, August, and
November. 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.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring shall begin immediately until such time that a single test is passed. Upon passing, this monthly
test requirement will revert to quarterly in the months specified above.
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 TGE6C.
Additionally, DWR Form AT-2 (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 emailed to ATForms.ATBAncdenngov.
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, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above. 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 either these monitoring requirements 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 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.
Page 4 of

Permit NCO089265
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 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)]
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
monthly 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.
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; and
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).
Page 5 of

Permit NC0089265
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-eliminarion-
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: http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)]
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 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
Page 6 of

Permit NC0089265
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 &6m the date of the report. This period may
be extended by request of the Director at any time [40 CFR 122.4 1].
Page 7 of

L Little Fisher River
(flows SE)
lit
Fisher River
Outfa11001 !` -` = (flows E)
@ Main stem
(Flows E)
1� NeW Ho
%
Il / Discharge line 1 100
(flows N)JVV
E
} r—
Prison Camp Road ^
CC
(NCSR 1345) \J
Dobson Potable 1W P
(Approx Location) I o�
Main Street
It (Hwy 601 BUS)
19
_� .. • -7.
Driv
S heater- S r _ � ►- .
Town of Dobson
Facility
Dobson WTP
Location
not to scale
Drainage Basin:
Yadkin - Pee Dee Receiving Stream: Fisher River
Latitude:
36' 24' 49" N State Grid/USGS: B 16NW / Dodson, NC
Longitude:
Stream Class:
80° 43' 16" W Stream Segment: 12-63-(9)
C HUC: 03040101
} ],F7PDES
North
Permit NC0089265
Sub -Basin:
03 07-02
Surry County