NC0046418_Draft Permit_20230815

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Wilkes County Schools
Attn: Thomas J. Spicer (ORC)
613 Cherry St
Wilkesboro, NC 28659
Dear Permittee,
S L4i
Maaa
NORTH CAROLINA
EnvlronmaMW Quality
08/15/2023
Subject: Draft NPDES Permit NCO046418
Mountain View Elementary School WWTP
Grade I Biological WPCS
Wilkes 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:
• Section A. (3.) has been updated to require electronic submission of
effluent data reports (DMRs). Federal regulations require electronic
submittal of all discharge monitoring.
• An updated outfall map has been included.
• In July 2016 the NPDES program began implementation of revised ammonia
criteria based upon the potential for toxic impacts from ammonia [see
attached memorandum]. As permits are received for renewal (or major
modification), ammonia limits will be calculated as per the 2016 memo and
implemented. The ammonia limits will take effect in 2028 to allow your
facility time to make any necessary modifications to meet the limits.
Total Residual Chlorine limit has been updated because streamflow
conditions require a limit of 17 µg/L, this new limit will take effect in 2028.
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 1). 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 Wilkes 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 e-mail at kate.shadwell(c�deq.nc.gov.
DwE Q North Carolina Deparnnent of Environmental Quality I Division of Water Resources
o- -OO512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
X 919.707.9000

Sincerely,
M
Catherine Shadwell
NPDES Compliance and Expedited Permitting
cc: NPDES File [Laserfiche]
Winston Salem Regional Office [Laserfiche]

Permit NC0046418
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 Contr ct, as amended,
Wilkes County S
are hereby authorized to discharge wastew4fter fronj a facility located at the
Mountain View Elementa School WWTP
5464 Mou ptain w Rd
Ha,�
Wilkes 'Con ty
to receiving waters designated as am butall to Mulberry Creek in the Yadkin -Pee Dee River
Basin in accordance with effluent 11 t' mg requirements, and other conditions set forth in
Parts I,11, III and IV hereof.
�4,
This permit shall becom
This permit and authorization to discharge shall expire at midnight on September 30, 2028.
Signed this day
Richard E. Rogers Jr.
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 6

Permit NCO046418
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.
Wilkes County Schools
are hereby authorized to:
1. Continue to operate an existing 0.01 MGD wastewater treatment f ility that includes the following
components:
• Septic tank
• Single -siphon dosing tank
• Surface sandfilter
• Calcium hypochlorite disinfection
• Sodium sulfite dechlorinatio
• Pumping station
• 9,270 linear feed of force ma
• Concrete vault 'dwh.�
The facility is located at the
Hays) in Wilkes Cot
School WWTP (5464 Mountain View Rd,
2. Discharge from said treatment works via Outfall 001, at the location specified on the attached
map, into an unnamed tributary to Mulberry Creek, a waterbody currently classified C [Stream
Index: 12-42] within subbasin 03-07-01 [HUC: 0304010104051 of the Yadkin -Pee Dee River
Basin.
Page 2 of 6

Permit NCO046418
PART I.
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Biological Water Pollution Control System [I5A NCAC 08G .0302]
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:
Limits
Monitoring Re uirements
PARAMETERS
Monthly
Daily
Measurement
Sample
eDMR Code
Average
Maximum
Fre uenc
Sample Type
Location2
Flow (MGD)
50050
0.01 MGD
Weekly
Instantaneous
Influent or
Effluent
BOD, 5 day, 20°C
C0310
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
Total Suspended Solids
C0530
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
NH3 as N
C0610
22.6 mg/L
35.0 mg1Lr
2/month
Grab
Effluent
(April 1 to October 31
NH3 as N
C0610
Monitor and Report
2/Month
Grab
Effluent
November 1 to March 31
NH3 as N3
C0610
2.0 mg/L
10.0 mg/L
2/month
Grab
Effluent
(April 1 to October 31
NH3 as N3
C0610
4.0 mg/L
20.0 mg/L
2/Month
Grab
Effluent
November 1 to March 31
Dissolved Oxygen
00300
Daily Average > 6.0 mg/L
Weekly
Grab
Effluent
Fecal Coliform
31616
200/100 mL
4001100 mL
2/Month
Grab
Effluent
(geometric mean
Total Residual Chlorine
50060
28 Ng/L
2/Week
Grab
Effluent
(TRC)4
Total Residual Chlorine
50060
17 pg/L
2/Week
Grab
Effluent
(TRC)5
Temperature °C
00010
Monitor and Report
Daily
Grab
Effluent
Total Nitrogen
00600
Monitor and Report
Quarterly
Grab
Effluent
Total Phosphorous
00665
Monitor and Report
Quarterly
Grab
Effluent
pH
00400
Not < 6.0 or > 9.0 standard
2/Month
Grab
Effluent
units
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's
eDMR system [see A. (3.)].
2. Sample Locations: Effluent = at the wet well.
3. New Ammonia limits will go into effect January 01, 2028.
4. The facility shall report all effluent TRC values reported by a NC certified laboratory
(including field certified laboratories). However effluent values < 50 µg/L will be treated
as zero for compliance purposes.
5. New TRC limits will go into effect January 1, 2028.
Page 3 of 6

Permit NCO046418
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN
OTHER THAN TRACE AMOUNTS
A. (2.) NUTRIENT REOPENER FOR HIGH ROCK LAKE
[G.S. 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.
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 efA tive on December 21, 2015.
NOTE: This special condition supplements or supersedes the foll g secfions within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requiremen
• Section D. (2.) Reporting
• Section D. (6.) Records Retenti
• Section E. (5.) Monitoring Repo
l . Re ortin Requirements ISUDersedes Swtion D. 2.! nd tion E. 5.I Aa
The permittee shall report dischar ionito data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eD et a*cation.
Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted
monthly electronicalVtMR
e eDMR system allows permitted facilities to enter monitoring data
and submit DMRs elaInternet. The eDMR system may be accessed at:
https://deq.nc.gov/ab-resources/edmr.
If a permittee is unabsystem 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
Page 4 of 6

Permit NCO046418
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).
a. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify theRitial 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. Instru on. how to access and use the appropriate electronic
reporting tool will be available as well. Informatio o 's,NPll' ES Electronic Reporting Rule is found at:
m
https://www.federalregister.gov/docuents/2015/ l - 54/national-pollutant-discharge-elimination-
system-npdes-electronic-reporting-rul
Electronic submissions must start he dates listed in the "Reporting Requirements" section above.
b. How to Re uest a Waiy2tjU tronic Reporting li4w
The permittee may see4 a temporary plectroTic reporting waiver from the Division. To obtain an electronic
reporting waiver, a permittee must fir ' submit an electronic reporting waiver request to the
Division. Requests for temporary ronic reporting waivers must be submitted in writing to the Division
for written approval at least sixty ) 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
c. Signatory Reauirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
Page 5 of 6

Permit NCO046418
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B. (11.xa) or by a duly authorized representative of that person as described in Part 1I, Section B. (I I .xb). 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:
V certify, under penalty of law, that this document and all attachments re prepared under my direction or
supervision in accordance with a system designed to assure that quay personnel properly gather and
evaluate the information submitted. Based on my inquiry of the per r persons who manage the system, or
those persons directly responsible for gathering the informationVIe i ation submitted is, to the best of
my knowledge and belief, true, accurate, and complete. I am e that t are significant penalties for
submitting false information, including the possibility of and imprisonm� for knowing violations. "
d. Records Retention ISuDDlements Section D. (6.
The permittee shall retain records of all Dischart
onitoring rts, including eDMR submissions. These
records or copies shall be maintained for a perioatlea from the date of the report. This period
may be extended by request of the Direct t any e [40 C 122.41 ].
Page 6 of 6

w-
'.
liays
�• • •
Outfall 001 +-���.f�ywAta�lt:.
±v��iw, \ .rM ('[•.w • • �• •.
V. . - r
ke
`f- UT to Mulberry Creek
,, JPJ
�� - / •ice -. s
✓ V _ �`•
Mulberry Creek
/'/, � '��. • "-- �s•• \ � / •, lam/ `� r;., �+.
1 }�? CopyrightC'2013 National Geographic_Society. cubed
JL
Wilkes County School
Mountain View Elementary School
N
* 1
t 15,000,000
Receiving Stream: UT to Mulberry Creek Stream Clap: C
Stream Segment: 12-42 Sub -Basin#: 03-07-01
River Basin: Yadkin -Pee Dee HUC: 030401010405
SCALE
NPDES Permit NCO046418
Latitude: 36' 14' 53" N Longitude: 81 ° 07' 02" W
1:20.000

Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
June 19, 2003
TO: NPDES Unit Staff
FROM: David A. Goodrich
NPDES Unit Supervisor
SUBJECT: Total Residual Chlorine Policy for NPDES permits
Every three years the State is required by the Clean Water Act to review its surface water quality standards and
classifications, determine if changes are needed and to make any necessary changes. This review process is referred to
as the "triennial review." Public hearings were held to solicit comments for the 2000-2003 Triennial Review of surface
water quality standards during the summer of 2002. The Hearing Officer's recommendations were presented before
the state's Environmental Management Commission on October 10, 2002.
The Hearing Officer's recommended changes included modifications to the existing standards for Arsenic, Cyanide,
Methylene Blue Active Substances (MBAS) and Total Residual Chlorine (TRC). The Hearing Officer also
recommended the addition of a standard for Methyl Tert-Butyl Ether (M'IBE).
All of the Heating Officer's proposed changes were adopted with the exception of MTBE. The changes took effect
on April 1, 2003. This memo documents the changes to the NPDES permitting policy for TRC limits.
Total Residual Chlorine (TRC)
Previously, TRC had an Action Level Standard, except in designated Trout waters. The Triennial Review changes
modified the TRC Action Level Standard to an Aquatic Life Standard of 17 µg/L. The Aquatic Life Standard will
remain for designated Trout waters.
Aquatic Life Standard —17 µg/L (freshwater only) Trout Waters —17 µg/L
Revised TRC Policy
➢ TRC limits will be assigned to permit renewals and all new permits issued after April 1, 2003.
➢ Facilities that do not use chlorine will not receive a TRC limit; however, the presence of a chlorine back-up
system to augment UV or other disinfection requires a TRC limit.
➢ Facilities discharging to streams with a 7Q10 <0.05 cfs (zero -flow streams) will receive a limit of 17 µg/L.
➢ Limits will be capped at 28 µg/L to protect against acute impacts.
It is likely that many facilities will need to add dechlorination (or use another means of disinfection) to comply with
the new TRC standard. Therefore, a compliance schedule of 18 months from the effective date of the permit may
be added to any TRC limit added during the current permit renewal. This time period is allowed in order for the
facility to budget and design/construct the dechlorination and/or alternative disinfection system(s). The NPDES
Unit has promulgated minimum design criteria in order to expedite permitting of dechlorination equipment.
cc: Coleen Sullins
Regional Office Supervisors (Dechlorination guidance attached)
Shannon Langley
H:\464182023\TRC policy 2003 .doc

Water- Resources
ENVIRONMENTAL QUALITY
Memorandum
To:
From:
Date:
Subject
PAT MCCRORY
Gm+enxn•
DONALD R. VAN DER VAART
NPDES Complex Unit
Tom Belnick
July 20, 2016
NPDES Permitting Guidance
NPDES Implementation of Ammonia Criteria- Update
Seclelwy
S. JAY ZIMMERMAN
Director
NC has still not adopted an ammonia standard, though it is on our WQS Triennial List for next
round. NC did establish ammonia chronic criteria for use in NPDES permitting back in 1989/90,
which was based on EPA's 1986 criteria development document that factored in pH/Temp across
three regions of the State (see attached). This evaluation resulted in ammonia chronic criteria of
1.0 mg/l NH3-N (summer) and 1.8 mg/l NH3-N (winter) for use in permitting purposes. NC
implements these chronic criteria as Monthly Averages limits utilizing instream dilution. In
2002, NC developed procedures for complimentary acute permit limits (discussed below).
The current ammonia permitting procedures should be as follows:
• The NH3/TRC Wasteload Allocation (WLA) spreadsheet automatically calculates
appropriate ammonia Monthly Average limits for summer and winter. The spreadsheet
assumes a background ammonia concentration of 0.22 mg/l.
• For any permit (new/renewal), always run the NH3/TRC WLA spreadsheet to verify
appropriate Monthly Average Ammonia Limits for protection of aquatic life.
• If the allowable ammonia concentration is greater than 35 mg/l, no limit should be
imposed.
• If the allowable concentration is less than 35 mg/l, then the allowable limit is needed and
the spreadsheet will automatically calculate it.
• For Municipal facilities, the acute limit will be expressed as a Weekly Average, and is
based on multiplying the Monthly Average limit by a factor of 3.
• For non -Municipal facilities, the acute limit will be expressed as a Daily Maximum, and
is based on multiplying the Monthly Average limit by a factor of 5.
• If a new more stringent ammonia limit is required, discuss the need for a Compliance
Schedule with senior staff and then with the Permttee.
• There is no RPA procedure used for ammonia; it is implemented strictly based on WLA
spreadsheet results (similar to TRC).
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919 707 9000

Page 12
• A sample NH3/TRC WLA is attached. In this example, the spreadsheet indicates that
Monthly Average ammonia limits of 3.2 mg/1 and 12.7 mg/1 should be imposed for
summer and winter, respectively, in order to protect for NC's chronic ammonia criteria.
Some additional considerations:
This guidance will need to be revisited after NC formally adopts an ammonia standard for
both chronic and acute aquatic life protection.
In the past, some ammonia limits were based strictly on protection of our DO standard
rather than ammonia toxicity, and that is why the permit writer should always verify the
correct ammonia limit with any permit renewal using the WLA spreadsheet.
In the past, some practices allowed for maintaining a less stringent ammonia limit if the
facility was consistently passing the WET test (i.e., biology trumps chemistry). This is
no longer a valid approach and EPA would object. In April 2016 EPA expressly stated
that NC cannot use biology to override chemical results. EPA also disallowed the use of
Action Levels in permitting, in which toxicity test results (if passing) were used to
override the need for permit limits for copper/zinc/silver/iron/chloride.

AMNiONXA CRXTERTA TABLES (NH3 as N)
Based on EPA recommended 4-day maximum average conoentration criteria
Mountains and Trout, Waters
•■F.MPF.R LIPfTR G!
TEMPERATURE
H 120C 230C ,
6.6 1.8084 1.0028 Total Ammonia
7.5 1•.8084 1.0111 (mg/l NH3 as N)
Piedmont Freshwaters
d
TEMPERATURE
H 140C 260C
j 6.8 1.8084 1.1344 Total Ammonia
7.5 1.8084 1.1541 (mg/l NH3 as N)
Coastal Plain and Sandhills Freshwaters
T MP U
H °C 8°
6. V(Y. 0 0 4 ,/Ej 4M:L
n o �a
7.5 6 0. 2 /�'N 3 a )�
TEMPERATURE
H 160C 280C
6.8 1.7920 0.9700 Total Ammonia
7.5 1.7920 0.9864 (mg/1-NH3 as N)
ti
/
c�
S�nw��
10/19/89
1. 8 rn I� � • 0 I�

NH3/TRC WLA Calculations
Facility: Anywhere USA
NC00
Prepared By: Tom Belnick
Enter Design Flow (MGD): 0.03
Enter s7Q10 (cfs): 0.13
Enter w7Q10 (cfs): 0.32
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS)
0.13
s7Q10 (CFS)
0.13
DESIGN FLOW (MGD)
0.03
DESIGN FLOW (MGD)
0.03
DESIGN FLOW (CFS)
0.0465
DESIGN FLOW (CFS)
0.0465
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
26.35
IWC (%)
26.35
Allowable Conc. (ug/1)
65
Allowable Conc. (mg/1)
3.2
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Fecal Coliform
w7Q10 (CFS)
0.32
Monthly Average Limit:
200/100mi
DESIGN FLOW (MGD)
0.03
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.0465
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
3.80
Upstream Bkgd (mg/1)
0.22
IWC (%)
12.69
Allowable Conc. (mg/1)
12.7
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/l, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)