NC0075612_factsheet_20230627

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO075612
Catherine Shadwell, Compliance & Expedited Permitting Unit / 919-707-3613 June 2023
FACILITY INFORMATION
Applicant/Facility Name
Wildcat Community Services (Jeffrey Blais, General Manager)
Wildcat Cliffs WWTP
Applicant Address/ facility
mailing address
770 Country Club Dr Highlands, NC 28741
Facility Physical Address
116 Birchwood Dr Highlands, NC 28741
Permitted Flow (MGD)
0.05 MGD
Type of Waste
100% Domestic, < 1 MGD
Facility Class
WW-2
County
Macon
Permit Status
Renewal
Regional Office
I ARO
STREAM CHARACTERISTICS
Receiving Stream
UT Cullasaja River
Stream
Classification
WS-III;Tr
Stream Segment
2-21-(0.5)
Outfall Lat.
350 05' 03.4" N
7Q10 - Summer (cfs)
0
Outfall Long.
830 09' 19" W
7Q10 - Winter (cfs)
0.08
Drainage basin
Little Tennessee
30Q2 (cfs)
0.24
Subbasin
04-04-01
Average Flow (cfs)
0.81
HUC
060102020201
1WC (%)
100% (summer) /
49.21 % (winter)
303(d) List
Not listed*
Facility Summary
Wildcat Community Services operates a country club with a private 100% domestic wastewater plant called
Wildcat Cliffs WWTP. Wildcat Cliffs WWTP is a minor facility (flow < 1 MGD) with two plants — one that
operates in summer, and one that operates in winter, the permitted flow for both is 0.05 MGD. The WWTP
was constructed in 1989, a second plant was added in 2001.
Winter Facility (0.015 MGD) utilizes the following components
• Flow splitter box
• Aeration basin
• Secondary Clarifier
• Tertiary sand filters
• Sludge holding tank
• Chlorine disinfection / Dechlorination
• Standby generator
Summer Facility (0.0035 MGD) utilizes the following components
• Flow splitter box
• Aeration basin
• Secondary Clarifier
• Tertiary sand filters
• Sludge holding tank
• Chlorine disinfection / Dechlorination
• Standby generator
Fact Sheet for Permit Renewal
June 2023 - NPDES Permit NCO075612 - Page 1

Renewal Summary
This renewal contains the following changes:
• Added the facility grade to Section A. (1.).
• Updated the effluent table in Section A. (1.) with eDMR parameter codes.
• Updated Section A. (2) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
• Added regulatory citations.
• *Removed comments on cover letter referencing Cullasaja River as a 303d waterbody. The
segment listed on the 303d list that is referenced in previous permit is downstream from the UT.
• Separated the two plants by components on Supplement to Cover Sheet in order to make it clear the
site has 2 operating plants.
• Added effluent monitoring for turbidity to determine compliance with 15A NCAC 02B.0211 (21).
• Added instream monitoring for temperature to determine compliance with 15A NCAC 0213.0211
(18).
Compliance History
Enforcement case in 2018 for BOD exceeding daily maximum and monthly average.
20 NOV cases from 2017-2019, 16 out of the 20 cases had BOD as an issue.
There have been no NOVs or issues since 2020 (per the ARO)
Comments on Draft Permit
ARO note pre drafting process — Site was noted to have 2 separate plants (one for summer use, one
for winter use) of varying size and previous permit did not reflect this. Requested to make note of
the two plants in supplement to cover sheet.
Confirmed facility Address with applicant — addresses and coordinates given on application had
discrepancies. Addresses on fact sheet and permit are slightly different than what is on 2022
application.
Fact Sheet for Permit Renewal
June 2023 - NPDES Permit NC0075612 - Page 2

IWC Calculations
Facility:Wildcat Cliffs WWTP
Permit No.: NC0075612
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.05
Enter s7Q10 (cfs): 0
Enter w7Q10 (cfs): 0.08
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) 0.05 0.2
DESIGN FLOW (MGD)
0.05 €
0.2
DESIGN FLOW (CFS) 0.0775 0.31
DESIGN FLOW (CFS)
0.0775
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)
0.08
0.08
Monthly Average Limit: 200/100m1 € 200/100m1
DESIGN FLOW (MGD)
0.05
0.2
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.0775
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 (%)
49.21
79.49
Allowable Conc. (mg/1)
3.4
2.2
*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)