WQCS00054_NOV-2021-DV-0186 Response_20210331

Public Works
500 North Main Street
Suite # 600
Monroe, NC 28112
T. 704-296-4210
March 31, 2021
Mr. W. Corey Basinger
Regional Supervisor
Water Quality Regional Operations Section
Mooresville Regional Office
610 East Center Ave., Suite 301
Mooresville, NC 28115
Subject: Notice of Violation
Tracking #: NOV-2021-DV-0186
Sanitary Sewer Overflows - February 2020
Collection System Permit - WQCS00054
Union County
Dear Mr singer:
RECEIVED/NCDEQ/DWR
APR - 5 2021
WQROS
MOORESVILLE REGIONAL OFFICE
Union County has received the NOV referenced above for collection system overflows.
Explanations of the overflows were on the BIMS Overflow Reporting Forms submitted by Union
County Public Works (UCPW) to the NCDEQ. However, we have added a few additional facts
in the explanations below.
Incident # Date Location
202100454 2/10/2021 2856 Gray Fox Rd
Response:
The SSO listed in this section was due to an Air Release Valve (ARV) failure. The ARV is
located on the Helmsville Road Pump Station Force Main. The failure occurred due to corrosion
of the saddle connection below the valve above the shutoff. This corrosion caused the
connection to weaken and when the pumps ran the spill occurred. We took immediate action
by shutting pump station down and put a pumper truck on standby. We then replaced the
saddle and the system was restored to normal operations.
Incident # Date Location
202100953 2/10/2021 7001 Sedgwick Rd
The SSO listed in this section was due to an obstruction causing a backup. The
issue that caused the spill/blockage was a flow meter that came loose and