NC0063321_Fact Sheet v3 renewal 19Jul2022_20220719

FACT SHEET
EXPEDITED RENEWAL - NPDES PERMIT
NCO063321 — WPCS Class 2
Basic Information
Permit Writer/Date
Joe R. Corporon L.G. / NPDES / 19Feb2022
Permit Number - Class
NC0063321 WWTP - WPCS Class 2
Flow
0.200 MGD
Owner
Tuckaseigee Water and Sewer Authority (TWSA)
Facility Name
Cashiers #3 WWTP
Facility Contact
Stan Bryson, Operations Superintendent / 828-586-5189
Type of Waste
100 % domestic
Basin Name/Sub-basin number
Savannah River Basin / 03-13-01
Receiving Stream
Chattooga River [Segment 3]
Stream Classification in Permit
B; Trout; ORW [no changes from previous]
Does permit need Daily Max NH3 limits?
No need - has MA & WA [summer and winter]
Does permit need TRC limits/language?
Has limit 22 µg/L (revised the TRC footnote for renewal)
Does permit have WET testing?
No - per guidance document 2016
[replaced by NH3 limits and monitoring]
Does permit have Special Conditions?
Yes — collection -system additions require MOD (see A. (2.).
Does permit have instream monitoring?
YES — Temp, Fecal, DO [ORW waters]
Is the stream impaired (on 303(d) list)?
No
Any obvious compliance concerns?
No
Any permit MODS since last permit?
No
Request for Renewal
Received 25Feb2022
Current expiration date
August 31, 2022
New expiration date
August 31, 2027
Comments received on Draft Permit?
Revised Ammonia limits: "Winter no greater than 2x Summer"
per 15A NCAC 2B .0404(c).
Renewal Strategy -- Flow is 100% domestic to receiving stream classified B; Trout; ORW. In lieu of WET
testing, the Permittee monitors Ammonia w/ limits (summer and winter). Parameters of Concern (POCs)
reported within permit limits [no violations since 16Oct2017 [BOD5]. TWSA has made no treatment system
alterations since last renewal (2017) - no permit changes recommended. DWR updated eDMR text; continued
reminder to Permittee in cover letter of ORW stream classification.
Data Review /Compliance Review -- BIMS effluent data from Jan2018 through Feb2022 (see XL Summaries).
BOD5, TSS, and Ammonia (NH3 as N) compliance good; monitoring effluent for Ammonia and instream
continues considering delicate stream class. Compliance issues limited to one NOV for BOD5 in Oct2017 (no
CPAs).
Flow Summary by Year
Year
Average Flow
in MGD
Maximum
Flow in MGD
Number of
Discharges
Highest Reported
Monthly Average
Flow
2018
0.091
0.216
366
—
2019
0.083
0.184
364
—
2020
0.094
0.213
366
—
2021
0.090
0.267
365
—
2022
0.070
0.204
59
0.113 MGD
Renewal / Comments on DRAFT / Staff Report — ARO's last Staff Report is dated 29Aug2018. A previous
report submitted by a concerned citizen, Bill Floyd, described receiving stream "impacts" he felt threatened the
ORW classification (undocumented). Previous report with photos added to the file, 2017.