NC0020338_Schedule of Compliance for Total Cooper_20220302

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February 24, 2022
ATTN: Mike Montebello RECEIVED
NCDEQ—Municipal Permitting Unit
�R 2 2022
1617 Mail Service Center
Raleigh, NC 27699-1617
NCDEQIDWRINPDES
NPDES Permit NC0020338
Town of Yadkinville WWTP
Section A(5)Schedule of Compliance for Total Copper(Outfall 001)
Dear Mr. Montebello:
Schedule of Compliance of the above referenced NPDES Permit requires submittal within one
year of the effective date a Corrective Action Plan for achieving compliance with the newly issued
copper permit limits. These actions have already been completed.
WWTP staff have completed the required sampling for a Water Effects Ratio (WER)for copper. The
completed WER was submitted 4/21/2021 to NC DEQ(Cassidy Kurtz). NC DEQ is actively working on
possibly modifying our NPDES Permit.
We have collected copper samples from throughout points of the collection system to identify possible
sources. For Example:
• Water Treatment Plant lift station Process waste and domestic waste(10.4 ug/L avg.)
• North Gate Lift station all residential(17.2 ug/L avg.)
• Lamplighter lift station 7 contributing lift stations(26.5 ug/L avg.)
- These few examples constitute 50%of our uncontrollable source flow.
• YMCA Lift station DOT maintenance, YMCA, hair salon, Church (464.9 ug/L avg.)
- Due to above average copper levels in samples collected from the DOT discharge. Contact
was made with DOT representatives and after several in person meetings, actions were
taken by both sides(i.e., repair of numerous broken clean outs, used our camera to inspect
specific lines that connects to the lift station.)
- Due to above average copper levels in samples collected from the YMCA discharge. Contact
was made YMCA personnel along with an on-site visit to observe pool maintenance
procedures. Came to an agreement that pool water would be discharged at a lower
frequency and contact the WWTP prior to pool discharges.
- Hair salon and Church showed normal to average copper levels.
213 Van Buren Street
Post Office Drawer 816 Telephone (336) 679-8732
Yadkinville, North Carolina 27055-0816 Fax (336) 679-6151

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During required annual inspections with our SIU's copper reduction was discussed at each of their
facilities.
2 SIU permits Unifi Permit 0002 and Permit 0005 were previously modified (2020)to reduce allocated
copper. Unifi has also installed an ion exchange water softener to assist with metals reduction at the
Permit 0005 site.
All future equipment orders will be non-copper if available (Stainless Steel for condensate coils).
If NCDENR feels there are any corrections to be made please advise.
Sincerely
Grant F.Trivette
WWTP ORC
213 Van Buren Street
Post Office Drawer 816 Telephone (336) 679-8732
Yadkinville, North Carolina 27055-0816 Fax (336) 679-6151