NC0088447_Draft Permit_20260204

JOSH STEIN
D. REID WILSON
Yerre r,
RICHARDE. ROGERS, JR
0,ww,
Daniel Early
Town of Oriental
P.O. Box 472
Oriental, NC 28571
Dear Mr. Early:
NORTH CAROLINA
fmfraruwe tafgwaaly
2/3/2026
Subject: Draft NPDES Permit Renewal NCO088447
Town of Oriental WTP
Physical Chemical Not Classified
Pamlico County
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.
The draft permit includes the following significant changes from the existing permit:
• Updated the water and wastewater treatment components in the Supplement to Permit Cover Sheet and
Fact Sheet to reflect the change in the dechlorination method from calcium thiosulfate to sulfur dioxide.
Alum/aluminum sulfate was removed from the chemical usage fist and replaced with sulfur dioxide.
+ Added the "Duration of Flow" row to the Effluent Table in Section 1.
+ Added Mixing Zone Special Condition (Section A. (2)) and adjusted Reasonable Potential based on
mixing zone.
o Removed Lead from the Effluent Table based on Reasonable Potential Analysis.
o Changed the Monthly Average and Daily Maximum for Total Copper and the Daily Maximum
for Total Zinc in the Effluent Table to reflect the calculations in the Reasonable Potential
Analysis.
o Added Downstream monitoring for Total Copper and Total Zinc to the Effluent Table.
o Changed the location of Downstream Sampling to less than 160 feet from the outfall based on the
mixing zone.
o Removed Schedule of Compliance (Outfall 001) special condition (previously Section A.(3)).
+ Removed Total Iron and Total Manganese from the Effluent Table since there are no longer state water
quality standards for iron or manganese.
+ Changed the Sample Type for Total Nitrogen in the Effluent Table from "Grab" to "Calculated".
+ Updated Section A. (3) to include language for submitting toxicity testing results to the eDMR system.
+ Updated Section A. (4) to reflect current federal requirements for Electronic Reporting of Discharge
Monitoring Reports.
Please note that Whittaker Creek 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
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DRAFT NPDES Permit Renewal
Permit NC0089447
Page 2 of 2
division names have been updated. The latest version is available atlhUM!/XwwwLdCglttcigav/rlpdas-standarti-
LwnditioTls�bolWWllate,411100011[2/gpen 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 Pamlico County area, per EPA requirements.
Please provide your comments, if any, to me at the address below 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 at
[phone], or via a -mail at [e-mail].
Sincerely,
Cassilyn Shires, Environmental Specialist I
NPDES Compliance and Expedited Permitting Unit
Division of Water Resources
cc: NPDES File [laserfiche]
DWR WQ Regional Operations- Washington Regional Office [laserfiche]
DWR Operator Certification Program / Jeffrey Talbott ieffreyiWbott@deamc:mv cc: Renee
Thompson: mneeLthomvson(tkdcw:ncseov
DWR Aquatic Toxicology Branch / kTFomss:kl IIBAdeainc:aov cc: Cindy Moore
DMF Shellfish Sanitation / Andy Haines

NPDES Permit NCO088447
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWA
In compliance with the provisions of North Ca
and regulations promulgated and adopted
Commission, and the Federal W�
is hereby authorized to
O
to receii
effluent
hereof.
The permit shall
This permit and the authocizzit
If the permittee intends to corn
application must be submitted
permit)
Signed this day
of
THE
I Statute 143=215.1, other lawful standards
Carolina Environmental Management
Control Act, as amended, the
a facility known as
reeZwithin the Neuse River Basin in accordance with
v
and other conditions set forth in Parts I, II, III and IV
ischarge shall expire at midnight on January 31, 2031.
discharge at the facility beyond the term of this permit, a renewal
. than August 4, 2030 (180 days before the expiration of this
Caroline Robinson
Compliance & Expedited Permitting Unit Supervisor
Division of Water Resources
Page 1 of 8

NPDES Permit NCO088447
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 described herein.
The Town of
is hereby authorized to:
1. Continue to operate an existing water treatmerft plant with discharge
ion exchange and greensand units. This water Y eaiment plant curren
of 0.2 MGD. Water and wastewater treatment consisls•of:
• Water supply well system
• Aeration
• Filtration
• Oxidation
• 3,000 gallon rse8ling yank
• Two (2) 1,700 gallon sett]
• Ion -exchange water•softer
• Tw/(2)-gravity filierg using anthracite, gree, nsand, and gravel
• Dechlorination using sulfur dioxide
• Settling tanks
• iliffiisrr
Chemical usage consists of
• Sulfur dibxde
• Chlorine (gas)
• Ammonia (to produ
• Salt brine
wastewater from
,n potable flowrate
This facility is located at the Town of Oriental Water Treatment Plant (1300 Gilgo Road) in Oriental
in Pamlico County.
2. Discharge from said treatment works via Outfall 001 at a location specified on the attached map, into
Whittaker Creek [Stream Segment: 27-130], a waterbody currently classified SA; HQW, NSW
within subbasin 03-04-10 [HUC: 030202040603] of the Neuse River Basin.
Page 2 of 8

NPDES Permit NCO088447
PART
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[I5A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Physical Chemical Not Classified
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash, from ion exchange and greensand units, via Outfall
001. Such discharges shall be limited and monitored' by the Permittee as specified below:
EFFLUENT CHARACTERISTIC
Parameter Code
LIMITATIONS
MONITORING RE UII2EMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location 2
Flow 3 (MGD) 50050
0.029
�/
Once per
Discharge
Grab
Effluent
Duration of Flow (Hrs) 81381
Momto�& Report
Dischaiee
Calculated
Effluent
Total Suspended Solids C0530
30.0 mg/L `
\45:0 mg/L
2/Month
\ Grab
Effluent
Total Residual Chlorine' 50060
1 '13 4/1,
'2/Month
\ \Grab
Effluent
pH 00400
Not <6.8or>Wu
n tandard units
2/Month
\ )
Grab
Effluent
pH (s.uJ 00400
'\Iytonitor&,Report \
, Monthly
Grab
Downstream'
Total Dissolved Solids
m 70�5
\\ \
IvIb�it\r & Rep\rt�
\ \
Mo tW
Grab
Effluent
Turbidity (NTU) /, �000Z6'
\ Monitor,& Rep`ortr�,
1--,Monthly
Grab
Effluent
Dissolved Oxygen (mg/6\<00300
Monito`& Report
Monthly
Grab
Effluent
Downstream'
Salinity (ppt)�0980-
/ IMonitor & R rt
Monthly
Grab
Euent
Downstream'
Conductivity (µmhos/cm `0094,
Mo in for, \Report
Monthly
Grab
Effluent 7
Downstream
Total Copper, \ \010,42
'37.0•µg/L
1 49.5 µg/L
Monthly
Grab
Effluent
Total Copper \ \ 07042,
Monitor & Report
Quarterly
Grab
Downstream'
Total Chloride (mg/L\ 000,,0
Monitor & Report
Monthly
Grab
Effluent
Total Zinc �\ 010i2
Monitor &
report
810.8 µg/L
Monthly
Grab
Effluent
Total Zinc '\O,l Q92�
Monitor & Report
Quarterly _
Grab
Downstream'
Ammonia Nitrogen (mg/L) `C06•f 0
Monitor & Report
Monthly
Grab
Effluent
TKN s (mg/L) 00625
Monitor & Report
Quarterly
Grab
Effluent
NO3-N + NO2-N s (mg/L) 00630
Monitor & Report
Quarterly
Grab
Effluent
Total Nitrogen '(mg/L) C06001
Monitor & Report
I 2/Year
Calculated
Effluent
Total Phosphorus (mg/L) C06651
Monitor & Report
2/Year
Grab
Effluent
Acute WET Testing 6 TGE3E
I Monitor & Report
Quarterly
Grab
Effluent
Footnotes:
1. -The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see Section A. (4)].
Page 3 of 8

NPDES Permit NCO088447
2. Downstream sampling shall be less than 160 feet from the outfall.
3. Duration of discharge should be noted in log books and a Total daily discharge reported in the DMR.
4. The Division shall considerall.effluem TRC values reported below 50 µg/L.toibeiin compliance.withithe
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 below304tl#L. TRC limit and
monitoring requirements apply only if chlorine is added to disinfect.
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. Whole Effluent Toxicity (WET) testing of Mysidopsis bahia shall be performed as 24-hour pass/fail test at
90% effluent concentration during January, April, July and October [See Section A. (3)].
7. If no stream flow is available to sample, indicate "no stream flow" on DMR
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 in other than trace amounts.
A. (2) MIXING ZONE
[15A NCAC 02B .0226]
This permit incorporates a mixing zone due to the installation of a diffuser. The established mixing zone
is approximately 164 ft. long, 72 ft. wide, and 6.5 ft. deep. This mixing zone implements an additional
quarterly Total Copper and Total Zinc sampling location downstream of the discharge. The Monthly
Average Flow Limit (0.029 MGD) was then converted to gallons per day and divided by the mixing
zone volume (581,178.5 gallons) to generate a dilution factor of 20:1.
29,000 gallons per day / 581,178.5 gallons = 5%
Based on these calculations, a dilution factor of 20:1 was used in the Reasonable Potential Analysis to
calculate the Effluent Limits for metals.
A. (3) SW -ACUTE TOXICITY PASS/FAIL MONITORING ONLY (QUARTERLY)
[15A NCAC 02B .0200j [15A NCAC 02B .0500 et seq.]
The permince shall conduct acute toxicity tests on a quarterly asis 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 Mysid Shrimp (Mysidopsis bahia) 24 hour static test. The effluent concentration at
which there may be at no time significant acute mortality is9(j% (defined as treatment two in the
procedure document). The tests will be performed: wring the months of 1 - „ril. end
Octob 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
TGE3E. Additionally, DWR Form AT-2 (original) is to be sent to the following address:
Page 4 of 8

NPDES Permit NCO088447
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, [e-mail].
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
concentration/response data, and be certified by laboratory
signature.
Total residual chlorine of the effluent toxicity sample
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facilit
required, the permittee will complete the informatioi
form indicating the facility name, permit number, pi:
with the notation of "No Flow" in the comment area
Water Sciences Section at the address cilted�above._
Should the permittee fail to monitor during
monthly monitoring will begin mimediatel,
requirement will revert toquarter ly.in the n
Should any test data from
Division of Water_Resour
opened and modified to ii
NOTE: Failui%e to achieve
organism survival and app
require immediate foklow-1
the month of the initial`mc
A. (4) ELECTRONIC I
[NCGS 143-215.1
;ical measurements and all
ORC or approved designate
;'measure\nd reported if chlorine is
a month in which,toxicity monitoring is
at e fop of the aquatic toxicity (AT) test
c, county, and the morith/year of the report
nn.,The report shall be•submitted to the
ing is required, then
this monthly test
rents or tests performed by the North Carolina
the receiving stream, this permit may be re-
rements or limits.
ins as specified"in the cited document, such as minimum control
ronmental controls, shall constitute an invalid test and will
be completed no later than the last day of the month following
OF MONITORING REPORTS
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
Page 5 of 8

NPDES Permit NC0088447
• 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 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:lhtlps:gftmc4myLdboutidiriision>itwabir+msuumwiedmr.
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, 2028, 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
Page 6 of 8

NPDES Permit NC0088447
In accordance with 40 CFR 122.41(l)(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:lhqpgt/gwwwffudme dl�dttersoyLdauumentgaUBA101L2' 120L3-
1#/naiiond kndl lutantdliediiur�aei#liniinulion�vstem�mrthse�leatroriic-+xenottin�+i�l le
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reportine
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:
IhUt//tlapmc LraVidboutididisionCUwater4msoumes/edmr
4. Sienatory Requirements ISuoplements Section B. (11.) (b) and Supersedes Section B. (11.) Ml
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 11,
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:
Intmf/cltay iru: �ru�tduuuttll tv dtitutattiwaturrarcuuncesudntrc
Page 7 of 8

NPDES Permit NC0088447
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:
7 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. (6.11
The pi
submi
date o
122.4
Page 8 of 8
nding eDMR
least 3 years from the
:t,any time [40 CFR

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NCO088447 — Town of Oriental WTP
Facility
Town of Oriental
Location
Receiving Stream: Whittaker Creek Stream Class: SA;HQW*,NSNN
Latitude: 35° 02' 12" N Longitude: 76° 41' 18" W
Map not to scale
Sub -basin: 03-04-01 Stream Segment: 27-130
River Basin: Neuse HUC #: 030202040603
,/vpf(
Pamlico County