NC0038822_NC0038822 Factsheet 2023_20231121

NCDEQ/DWR/NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO038822
Sara Bassett/Compliance&Expedited Permitting Unit/sara.bassettgdeq.nc.gov/November 2023
FACILITY INFORMATION
Applicant/Facility Name Central Care Inc./Central Care WWTP
Mailing Address 139 Apex Lane Mt.Airy NC 27030
Facility Physical Address Same as mailing
Permitted Flow(MGD) 0.010 MGD
Type of Waste 100%Domestic
Facility Class WW-1 County Surry
Permit Status Renewal Regional Office WSRO
STREAM CHARACTERISTICS
Receiving Stream UT to Stewarts Creek Stream C
Classification
Stream Segment Outfall Lat. 36.4531N
7Q10 - Summer(cfs) 0 Outfall Long. 80.6478W
7Q 10 -Winter(cfs) 0 Drainage basin Yadkin-Pee Dee
30Q2 (cfs) 0 Subbasin 03-07-03
Average Flow(cfs) 0.075 HUC 0304010108
IWC(%) 100 303(d)List No
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Does permit need Daily Max NH3 limits? Yes,will become effective January 2028
Does permit need TRC limits/footnote? Already has
Does permit have toxicity testing? Tox is being removed and replaced with ammonia nitrogen
limit per 2016 Division policy
Does permit have any Special Conditions? Yes, High rock Lake reopener
Does permit have instream monitoring? Yes,temp and D.O.
New expiration date: February 28,2029
1. FACILITY SUMMARY
Central Care Inc. sends 100%domestic discharge to Central Care WWTP. Central Care WWTP is a minor
facility(flow< I MGD)with a design capacity and permitted wastewater discharge of 0.01 MGD facility
that includes the following components:
♦ Septic tank
♦ Dosing chamber
♦ Surface sandfilter
♦ Tablet chlorination
♦ Tablet dechlorination
RENEWAL SUMMARY
This renewal contains the following changes:
➢ Section A. (3.)has been updated regarding electronic submission of effluent data. Federal
regulations require electronic submittal of all discharge monitoring reports(DMRs).
➢ In July 2016 the NPDES program began implementation of revised ammonia criteria based upon
the potential for toxic impacts from ammonia. Previously, some 100% domestic discharges were

allowed to choose an effluent toxicity test instead of an ammonia limit. Based on input from EPA in
program and permit reviews,that option is no longer available.
As these permits are received for renewal(or major modification), ammonia limits are being
calculated and included in the permit in accordance with the revised criteria.Appropriate limits
have been added in this draft permit based on the results of the waste load allocation spreadsheet
and to remain consistent with the Division's 1999 ammonia policy for minor facilities discharging
< 1 MGD and the Division's updated 2016 ammonia criteria. The effluent toxicity test is being
removed, as it was only there in lieu of an ammonia limit.
These limits will take effect in January of 2028. This compliance schedule is to allow time for the
necessary facility modifications to meet the ammonia limits. Until the limits take effect,the facility
will monitor ammonia with no effluent limits.
➢ (Ammonia testing was subbed for toxicity in 2014 permit)
➢ The Waste Load Allocation spreadsheet for this discharge calculated NH3-N limits of 1.0 mg/L for
summer and 1.8 mg/L for winter. However,Division policy has established that for small
discharges(< 1 MGD)the best available treatment technology for these facilities leads to monthly
average limits no lower than 2 mg/L-summer and 4 mg/L—winter.
➢ The outfall coordinates were updated to match those provided in the application
COMPLIANCE HISTORY
1 tox enforcement 2022, 12 monitoring enforcements in 2021, 1 Limit and Monitoring Enforcement in 2020
COMMENTS ON DRAFT PERMIT