NC0058416_Fact Sheet_20180425 (24)

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require
full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile
home parks, etc) that can be administratively renewed with minor changes, but can include
facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing,
instream monitoring, compliance concerns).
Basic Information for Expedited Permit Renewals
Permit Writer/Date
Brianna Young 4/9/18
Permit Number
NCO058416
Facility Name / Facility Class
South Granville Water & Sewer Authority
SGWASA WTP / PC -1
Basin Name / Sub -basin number
Neuse River / 03-04-01
Receiving Stream / HUC
UT to Kna of Reeds Creek / 0302020104
Stream Classification / Stream Segment
WS -IV; NSW, CA / Index: 27-4-(8)
Does permit need Daily Maximum NH3
limits?
N/A
Does permit need TRC limits/language?
Already present
Does permit have toxicity testing?
Yes
Does permit have Special Conditions?
Yes — WET reo ener
Does permit have instream monitoring?
Yes — added upstream hardness in renewal
Is the stream impaired on 303(d) list)?
Yes - Benthos Fair ar, AL, FW
Any obvious compliance concerns?
Yes — toxicity testing
Any permit mods since lastpermit?
No
New expiration date
1/31/2023
Comments on Draft Permit?
None
Facility Overview:
This facility is a conventional technology water treatment plant (coagulation,
flocculation, sedimentation, filtration, and disinfection) with discharge of wastewaters
from media filter backwash and sedimentation basins with a design potable flowrate of
7.5 MGD and a maximum monthly average wastewater discharge of approximately 0.282
MGD (January 2015 — December 2017).
303(d) iMpaired listing_
27-4-(8) Knap of Reeds Creek 0.6 FW Miles WS-IV;NSW,CA
From a point 1.9 miles downstream of Granville County SR 1120 to Falls Lake, Neuse River
IRCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC Benthos Fair (Nar, AL, FW) 2004 1998
303(d) language for Draft/Final Cover Letters: "Please note that the receiving stream is
listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List.
Addressing impaired waters is a high priority with the Division, and instream data will
continue to be evaluated. If there is noncompliance with permitted effluent limits and
stream impairment can be attributed to your facility, then mitigative measures may be
required."

Compliance History:
• 6 limit violations for TRC January 2013 to February 2018; All BPJ'd
• Failed 6 of last 12 toxicity tests; failed last 5 toxicity tests; Section A. (3) toxicity
re -opener clause will remain in the permit
RPA:
• Fluoride did not show reasonable potential to violate state WQS; however, since
fluoride has the potential to be discharged, and the predicted max is > 50% of
allowable Cw, Total Fluoride will remain in the permit at quarterly monitoring
• Aluminum is no longer a metal to perform an RPA on; however, since
alum/aluminum sulfate has the potential to be discharged per the renewal
application, Total Aluminum will remain in the permit at quarterly
• Total Copper showed reasonable potential to violate state WQS; limits added and
monitoring changed to monthly
NCG59 General Permit Eligibility:
• They have failed 6 of last 12 toxicity tests, and failed last 4 toxicity tests,
therefore they are not eligible by tox standards
Changes from previous permit to draft:
• Added eDMR footnote in A(1) and language as A(4)
• Updated outfall map
• Added regulatory citations
• Updated language on supplement to permit cover sheet per 2012 guidance update
• Limits added for Total Copper and monitoring increased to monthly based on
RPA
• Units of measure changed from mg/L to µg/L in A(1) for total copper, total
fluoride, and total aluminum
• Monitoring for Total Manganese reduced to quarterly per WTP guidance; no RPA
to perform on manganese as there is no longer a standard
• Hardness monitoring added to A(1) per WTP guidance
• Language "Monitor and Report" added to WET testing in A(1)
• Removed former footnote #3 "Samples shall be collected concurrently with WET -
test samples" as concurrent testing with tox is no longer required
• TRC footnote updated in A(1)
• Added "All samples collected should be from a representative discharge event"
under A(1) as this is used in all permits
• Updated tox language in A(2)
Comments received on draft:
None