NC0026441_NOV-2024-LV-0102_20240314

Fe
L E7 P
CS10
Town of *fifer Citp
Public works and Utilities
March 03, 2024
Attn: Vanessa E. Manuel, Assistant Regional Supervisor
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: NOTICE OF VIOLATION & INTENT TO ASSESS CIVIL PENALTY
Tracking Number: NOV-2024-LV-0102
NPDES Permit # NCO026441
Town of Siler City
Chatham County
Dear Vanessa E. Manuel,
MAR 1 4 2024
This letter is in response to the NOV & Intent for Civil Penalty issues on February 02, 2024, for
exceeding the following parameters for December 2023:
Sample Limit Reported Type of
Location Parameter Date Value Value Violation
001 Effluent Nitrogen, Ammonia Total (as N) 12/30/2023 6 7.3 Weekly Average Exceeded
It is believed that we exceeded the weekly average for week 5 Ammonia due to some high flow on 12/27/2023,
potentially speeding up the detention time through the plant, and reducing treatment. Also, we started experiencing
some inhibition to the facility starting at the end of December and currently. We started to haul the WTP residuals to
the WWTP to process through the press keeping their flow out of the collection system, increased sampling, and
reseeded with RAS flow from the Sanford WWTP. We are also working with Hazen and Sawyer Engineering firm
to understand this inhibition and work through it. We are hopeful all the measures taken will resolve the inhibition
and give us information to prevent it in the future.
Sincerely,
Brittany York, d-44-.C�ya4—
WWTP Superintendent,
Siler City
Cc: Hank Raper —Town Manager, Chris McCorquodale— Utility Director
Brittany York Brittany York
WWTP Superintendent [e-mail]
PO Box 769 • 311 N Second Avenue Phone: [phone]
Siler City, NC 27344-0769 www.silercity.org