NC0038709_Fact Sheet_20230815

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO038709
Catherine Shadwell, Compliance & Expedited Permitting Unit / 919-707-3613 July 2023
FACILITY INFORMATION
Applicant/Facility Name
Wilkes County Schools (Thomas J. Spicer, ORC)
Roaring River Elementary School WWTP
Applicant Address
613 Cherry St North Wilkesboro, NC 28659
Facility Physical
Address/Mailing Address
283 White Plains Rd Roaring River NC 28669
Permitted Flow (MGD)
0.0045 MGD
Type of Waste
100% Domestic, < 1 MGD
Facility Class
WW-1
County
Wilkes
Permit Status
Renewal
Regional Office
WSRO
STREAM CHARACTERISTICS
Receiving Stream
Yadkin River
Stream
Classification
WS-V
Stream Segment
12-(45)
Outfall Lat.
360 12' 03" N
7Q10 - Summer (cfs)
276
Outfall Long.
810 00' 21" W
7Q10 - Winter (cfs)
375
Drainage basin
Yadkin -Pee Dee
30Q2 (cfs)
552
Subbasin
03-07-01
Average Flow (cfs)
1181
HUC
030401010407
IWC (%)
0% (summer) / 0%
(winter)
303(d) List
Not listed.
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Does permit need Daily Max NH3 limits?
Already present in permit
Does permit need TRC limits/footnote?
/A due to massive instream dilution
Does permit have toxicity testing?
No
Does permit have any Special Conditions?
Yes, Nutrient Reopener for High Rock Lake
Does permit have instream monitoring?
No
New expiration date:
Sep 30, 2028
Facility Summary
Small WWTP for a school with a population of —300 students and staff. Facility was originally permitted in
1979. This facility utilizes the following treatment components:
• Septic Tank with dual bell siphons
• Dosing tank
• Dual surface sandfilters with pea gravel bed
• Effluent pump station and force main
Renewal Summary
This renewal contains the following changes:
• Added the facility grade to Section A. (L).
• Updated Section A. (3.) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
• Updated outfall map
Fact Sheet for Permit Renewal
July 2023 - NPDES Permit NCO038709 - Page 1

Compliance History
There have been no NOVs issued in the last 5 years (2018-present). The most recent inspection (Feb 2020)
found the site to be in compliance.
Comments on Draft Permit
Fact Sheet for Permit Renewal
July 2023 - NPDES Permit NC0038709 - Page 2

IWC Calculations
Facility: Roaring River Elementary School WWTP
Permit No.: NC0038709
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.0045 0.2 <= Permitted Flow if Different from Design
Enter s7Q10 (cfs): 276
Enter w7Q10 (cfs): 375
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
s7Q10 (CFS)
276
276
s7Q10 (CFS)
276
276
DESIGN FLOW (MGD)
0.0045 €
0.2
DESIGN FLOW (MGD)
0.0045
0.2
DESIGN FLOW (CFS)
0.006975
0.31
DESIGN FLOW (CFS)
0.00698
0.31
STREAM STD (UG/L)
17.0
17
STREAM STD (MG/L)
1.0
1
Upstream Bkgd (ug/1)
0
0
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
0.00
0.11
IWC (%)
0.00
0.1121928
Allowable Conc. (ug/1)
672705
15152
Allowable Conc. (mg/1)
30865.5
695.5
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
Fecal Coliform
w7Q10 (CFS)
375
375
Monthly Average Limit:
Not Requiredi4ot Required
DESIGN FLOW (MGD)
0.0045
0.2
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.00698
0.31
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
1.8
Dilution Factor (DF)
39570.89
891.32
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
0.00
0.08
Allowable Conc. (mg/1)
84948.0
1913.1
*2B .0404 (c) Applies
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)
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
By Policy dischargers < 1 MGD get limits no lower than 2 & 4 due to BAT
* From 2B .0404(c) - Winter Limits can be no less stringent than 2 times the summer limits
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

oQ.�E:srAiE
4
ROY COOPER -
Governor f
ELIZABETH S. BISER
'wvt u n r
SecretaryfixrnM'*
RICHARD E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
July 20, 2023
MEMORANDUM
To: Ben Kirby
NC DEQ / DWR / Public Water Supply
Winston Salem Regional Office
From: Catherine Shadwell
NPDES Unit
Subject: Review of Draft NPDES Permit NCO038709
Roaring River Elementary School WWTP
Wilkes County
Please indicate below your agency's position or viewpoint on the draft permit and return this
form by August 20, 2023. If you have any questions on the draft permit, please contact me
at 919-707-3613 or via e-mail [[e-mail]].
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained
properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
❑ Concurs with issuance of the above permit, provided the following conditions are met:
Opposes the issuance of the above permit, based on reasons stated below, or attached:
Signed ,/ - �
Date: O
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617E Q
919.707.9000 :v: i cnl�o�iva "'
Department of Environmental Quality /►�