NC0066397_factsheet_20230711

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO066397
Catherine Shadwell, Compliance & Expedited Permitting Unit / 919-707-3613 July 2023
FACILITY INFORMATION
Applicant/Facility Name
Cleveland County Schools (Tim Lancaster)
Casar Elementary School WWTP
Applicant Address
866 Poplar Springs Church Rd, Shelby, NC 28152
Facility Physical
Address/Mailing Address
436 School Rd Casar, NC 28020
Permitted Flow (MGD)
0.0066 MGD
Type of Waste
100% Domestic, < 1 MGD
Facility Class
WW-1
County
Cleveland
Permit Status
Renewal
Regional Office
MRO
STREAM CHARACTERISTICS
Receiving Stream
UT Crooked Run Creek
Stream
Classification
C
Stream Segment
9-50-18-(1)
Outfall Lat.
350 30' 22" N
7Q10 - Summer (cfs)
0
Outfall Long.
810 37' 12" W
7Q10 - Winter (cfs)
0
Drainage basin
Broad
30Q2 (cfs)
0
Subbasin
03-08-04
Average Flow (cfs)
0.03
HUC
030501050606
IWC (%)
100% (summer) / 100%
(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?
Already present in permit
Does permit have toxicity testing?
No
Does permit have any Special Conditions?
No
Does permit have instream monitoring?
o, inspection report notes facility feeds into a dry ditch
with no upstream or downstream flow.
New expiration date:
August 31, 2028
Facility Summary
Cleveland County Schools operates a small, private collection system for Casar Elementary School. The
school houses about 320 people when in operation. Casar Elementary School WWTP is a minor facility
with a design capacity of 0.0066 MGD, that feeds into a dry ditch. This permit was originally issued 1986.
0 7500-gallon septic tank
• 3 holding tanks (2 have filters)
• 4460ft2 sand filter bed
• 10,000 holding tank
• Recirculation piping/pumps allowing up to 60% recirculation to head of 2000-gallon septic tanks
0 UV disinfection system
Renewal Summary
This renewal contains the following changes:
• Instream monitoring requirements removed per recent inspection report which noted facility
releases into a dry ditch (no upstream or downstream flow)
Fact Sheet for Permit Renewal
July 2023 - NPDES Permit NCO066397 - Page 1

• Added the facility grade to Section A. (1.).
• Updated the effluent table in Section A. (1.) with eDMR parameter codes.
• Updated Section A. (3) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
• Added Section A. (2.) temporary means of disinfection, per G.S. 143-215, 143-215.1
Compliance History
• Looking back from 2018-present, there have been 3 NOVs, all related to BOD.
• Most recent inspection (04/2022) showed the facility to be in compliance.
Comments on Draft Permit
Fact Sheet for Permit Renewal
July 2023 - NPDES Permit NC0066397 - Page 2

IWC Calculations
Facility: Casar Elementary School WWTP
Permit No.: NC0066397
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.0066 0.2 <= Permitted Flow if Different from Design
Enter s7Q10 (cfs): 0
Enter w7Q10 (cfs): 0
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
s7Q10 (CFS)
0
0
s7Q10 (CFS)
0
0
DESIGN FLOW (MGD)
0.0066 €
0.2
DESIGN FLOW (MGD)
0.0066
0.2
DESIGN FLOW (CFS)
0.01023
0.31
DESIGN FLOW (CFS)
0.01023
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 (%)
100.00
100.00
IWC (%)
100.00
100
Allowable Conc. (ug/1)
17
17
Allowable Conc. (mg/1)
1.0
1.0
< 1 MGD Policy Applies
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
Fecal Coliform
w7Q10 (CFS)
0
0
Monthly Average Limit:
200/100m1 €
200/100m1
DESIGN FLOW (MGD)
0.0066
0.2
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.01023
0.31
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
1.8
Dilution Factor (DF)
1.00
1.00
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
100.00
100.00
Allowable Conc. (mg/1)
1.8
1.8
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)