NC0028975_Draft_Factsheet_20231114

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO028975
Caroline Robinson / Compliance & Expedited Permitting Unit / [e-mail] / Oct 2023
FACILITY INFORMATION
Applicant/Facility Name
City of Saluda (Steven Orr, City Manager)
Saluda WWTP
Applicant Address/Mailing
Address
PO Box 248, Saluda, NC 28773
Facility Physical Address
619 Pearson Falls Road, Saluda, NC 28773
Permitted Flow (MGD)
0.1 MGD
Type of Waste
Municipal, < 1MGD
Facility Class
WW-2
County
Polk
Permit Status
Renewal
Regional Office
ARO
STREAM CHARACTERISTICS
Receiving Stream
Joel's Creek
Stream
Classification
C
Stream Segment
9-55-1-4
Outfall Lat.
350 13' 50" N
7Q10 - Summer (cfs)
0.27
Outfall Long.
820 20' 37" W
7Q10 - Winter (cfs)
0.35
Drainage basin
Broad River Basin
30Q2 (cfs)
0.53
Subbasin
03-08-06
Average Flow (cfs)
0.86
HUC
030501051201
IWC (%)
36.47% (summer) /
30.69% (winter)
303(d) List
No
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Updated the monthly average and weekly average
Ammonia Nitrogen winter effluent limits (for months
November 1— March 31) based on the IWC
Does permit need Daily Max NH3 limits?
calculations and 2016 NH3 guidance document
(specifically 213 .0404c). The monthly average winter
limit for NH3 as N will be 4.8 mg/L and the weekly
average winter limit for NH3 as N will be 14.4 mg/L.
Does permit need TRC limits/footnote?
No — Already present in permit.
Does permit have toxicity testing?
No — not a complex wastestream
Does permit have any Special Conditions?
Yes — Effluent Mercury Analysis
Does permit have instream monitoring?
Yes — U & D for Temperature and Dissolved Oxygen
New expiration date:
July 31, 2028
FACILITY SUMMARY
The City of Saluda operates a municipal wastewater treatment plant for an estimated 1,000 residents. The
Saluda WWTP is a minor facility (flow < 1 MGD) with a design capacity and permitted wastewater
discharge of 0.1 MGD. The original NPDES permit for this facility was issued in December 1980. This
facility utilizes the following treatment components:
• Bar screen
• Influent channel
• Grit collection system
• 2 Clarifiers (both 21 feet in diameter)
Fact Sheet for Permit Renewal
Oct 2023 - NPDES Permit NCO028975 - Page 1

• Chlorine disinfection
• Dechlorination
• Chemical feed system
RENEWAL SUMMARY
This renewal contains the following changes:
• Updated electronic data submission requirements in Part I. A. (2).
• Updated the monthly average and weekly average Ammonia Nitrogen winter effluent limits (for
months November 1 — March 31) based on 2B .0404c.
COMPLIANCE HISTORY
Saluda WWTP has had eight enforcements since the permit was originally issued in November 2018. The
facility has been issued eight NOVs in 2019 for Dissolved Oxygen limit violations, one NOV in 2020 for a
flow limit violation, and two NOVs in 2023 for Ammonia Nitrogen. This facility has been issued one NOD
in 2019 for a Dissolved Oxygen limit violation. This facility has been issued 10 proceed to enforcement
cases for BOD, Total Suspended Solids, Fecal Coliform, and Flow limit violations in 2018, 2019, 2020,
2021, and 2023 since the permit was originally issued in November 2018. Most recent inspection (March
2022) showed the facility to be in compliance.
EFFLUENT MERCURY ANALYSIS
The permittee is required to provide one effluent mercury analysis, using EPA Method 1631E, in
conjunction with the next permit renewal application. The analysis should be taken within 12 months
prior to the application date. Any additional effluent mercury measurement conducted from the effective
day of this permit and up to the application date shall also be submitted with the renewal application. This
facility has not reported any effluent mercury data for this permit cycle using EPA Method 1631E,
therefore this analysis will continue to be a required part of the permit.
Fact Sheet for Permit Renewal
Oct 2023 - NPDES Permit NCO028975 - Page 2