NC0021326_Draft Permit_20181003

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NORTH CAROLINA
ROY COOPER Environmental Quality
Governor
MICHAEL S.REGAN
Secretary
LINDA CULPEPPER
Interim Director
October 03, 2018
Ms.Laura Neely
Town of Dobson
P. 0.Box 351
Dobson,NC 27071
Subject: Draft NPDES Permit
Permit Number NC0021326
Town of Dobson WWTP
' Grade II Biological WPCS [15A NCAC 08G .0302]
Surry County
Dear Ms. Neely:
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. Although
some aspects of formatting and appearance have changed, the draft permit contains no significant
changes in its terms from those found in your current permit.
Please note the following minor changes:
> Updated outfall map is included
> HUC and Stream Index number were added to outfall description
> Regulatory citations were added
Please submit any comments to me no later than thirty days following your receipt of the draft.
Comments should be sent to the address listed at the bottom of this page. If no adverse comments are
received from the public or from you, this permit will likely be issued in December 2018,with an
effective date of January 1, 2019. If you have any questions or comments concerning this draft permit,
please contact me at the telephone number listed at the bottom of the page, or via e-mail at
[e-mail].
Sincerely,
te,,,e,.3 Lae_
Emily DelDuco
Environmental Specialist
Compliance&Expedited Permitting Unit
cc: NPDES Program
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location:512 N.Salisbury St.Raleigh,North Carolina 27604
Phone:[phone] FAX:[phone]
Internet:www.ncwaterquality.org
An Equal Opportunity\Affirmative Action Employer

Permit NC0021326
Grade II Biological Water Pollution Control System[15A NCAC 08G .0302]
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
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,the
Town of Dobson
is hereby authorized to discharge wastewater from a facility located at the
Dobson Wastewater Treatment Plant
500 Vineyard Lane
Dobson
Surry County
to receiving waters designated as Cody Creek 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 2019.
This permit and authorization to discharge shall expire at midnight on December 31, 2023.
Signed this day 2018.
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 5

Permit NC0021326
Grade II Biological Water Pollution Control System[15A NCAC 08G .0302]
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.
The Town of Dobson
is hereby authorized to:
1. Continue operation of a 0.35 MGD wastewater treatment plant that includes the following
components:
• Rotomat/barscreen
• Flow splitter box
• Dual circular treatment units with aerobic&anoxic treatment, anoxic treatment, clarification
• Ultraviolet disinfection
• Back-up chlorine disinfection
• Lime sludge stabilization
• Sludge holding
This facility is located at the Dobson Wastewater Treatment Plant, 500 Vineyard Lane,near Dobson
in Surry County.
2. Discharge from said treatment works at the location specified on the attached map into Cody Creek
[Stream Index: 12-63-14], currently classified C waters in subbasin 03-07-02 of the Yadkin-Pee Dee
River Basin [HUC 030401010705].
Page 2 of 5

Permit NC0021326
Grade II Biological Water Pollution Control System[15A NCAC 08G .0302]
PART I
A. (1) 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 from outfall 001. Such discharges shall be limited and monitored)
by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Weekly Daily Measurement Sample Type Sample
eDMR Code Average Average `Maximum Frequency Location2
Flow 50050 0.35 MGD Continuous RecordingInfluent or
Effluent
BOD,5-day,20°C3 C0310 30.0 mgfL 45.0 mg/L Weekly Composite Influent&
Effluent
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Weekly Composite Influent&
Effluent
NH3 as N C0610 2.0 mg/L 6.0 mg/L Weekly Composite Effluent
(April 1 —October 31)
NH3 as N C0610 4.0 mg/L 12.0 mg/L Weekly Composite Effluent
(November 1 —March 31)
Dissolved Oxygen 00300 Daily average>5.0 mg/L Weekly Grab Effluent
Dissolved Oxygen 00300 Monitor&Report Weekly Grab U&D
Fecal Coliform(geometric mean) 31616 200/100 ml 400/100m1 Weekly Grab Effluent
Total Residual Chlorine4 50060 22 pg/L Weekly Grab Effluent
Temperature(°C) 00010 Monitor&Report ' Weekly Grab Effluent,
U'&D
Total Nitrogen(NO2+NO3+TKN) C0600 Monitor&Report Monthly Composite Effluent
Total Phosphorus C0665 Monitor&Report Monthly Composite Effluent
pH 00400 >6.0 and<9.0 standard units Weekly Grab Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application
system. See Condition A. (2.).
2. U: at least 100 feet upstream from the outfall. D: downstream at Hwy 601.
3. The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15 percent
of the respective monthly average influent value(85%removal).
4. Limit and monitoring requirements apply only if chlorine is added to disinfect. The Division shall consider
all effluent TRC values reported below 50 µg/1 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 .tg/l.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 5

Permit NC0021326
Grade II Biological Water Pollution Control System [15A NCAC 08G .0302]
A. (2.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(b)]
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs)
and specify that, if a state does not establish a system to receive such submittals,then permittees must
submit DMRs electronically to the Environmental Protection Agency(EPA). The Division anticipates
that these regulations will be adopted and is beginning implementation in late 2013.
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 [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. Until such time that the state's
eDMR application is compliant with EPA's Cross-Media Electronic Reporting Regulation
(CROMERR),permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DENR/DWR/Information Processing Unit
ATTENTION: Central Files/eDMR
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
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.
Requests for temporary waivers from the NPDES electronic reporting requirements 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 using eDMR. Temporary waivers shall be
valid for twelve(12)months and shall thereupon expire. At such time, DMRs shall be submitted
electronically to the Division unless the permittee re-applies for and is granted a new temporary
waiver by the Division.
Page4of5

Permit NC0021326
Grade II Biological Water Pollution Control System [15A NCAC 08G .0302]
A. (2.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS, continued
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting
requirements is found on the following web page:
http://portal.ncdenr.org/web/wq/admin/bog/ipu/edmr
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.
2. 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://portal.ncdenr.org/web/wq/admin/bog/ipu/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."
3. 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].
A. (3.). Nutrient Reopener for High Rock Lake
[NCGS 143.215.1 (b)]
This permit may be reopened and modified to implement nutrient requirements in accordance with any
future TMDL and/or nutrient management strategy for High Rock Lake.
Page 5 of 5

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NPDES Permit NC0021326 „,
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Receiving Stream: Cody Creek Stream Class:C
Stream Segment: 12-63-14 Sub-Basin#:03-07-02
River Basin:Yadkin-Pee Dee HUC:030401010705 SCALE 36.380556°N, -80.723611°W
County: Surry 1:16,000