WQCS00009_Response to Notice_20240722

RECEIVEDiNCDE©1pWR as e rfi c h e
JUL 2 5 2024
W�ROS WATER&SEWER AUTHORITY
WSACC MOORESVii_I_E REGIONAL OFFICE OF CABARRUS COUNTY
Office: 232 Davidson Hwy.
Concord, NC 28027
704.786.1783 • 704.795.1564 Fax
www.wsacc.org
ISO 140012004•SC Star Public Sector•OSSAS 18001:2007
July 22, 2024
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Andrew H. Pitner,P.G., Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources,NCDEQ, MRO
610 East Center Avenue, Suite 301
Mooresville,NC 28115
RE: NOV-2024-DV-0299,Collection System Permit No. WQCS00009
Water and Sewer Authority of Cabarrus Co Collection System
Cabarrus County
Dear Mr. Pitner: 11
i
WSACC is in receipt of the NOV for a Sanitary Sewer Overflow near 6266 NC Highway 49 North, Mt.
Pleasant,NC. Below is a summary of background information and steps taken as a result of the overflow:
6266 NC Highway 49 North Pipe Break
- The wastewater spill was caused by a contractor (BRS, Inc.) installing a new force main for
Town of Mt. Pleasant as part of the Empire Drive Pump Station Project. In early June 2024,
BRS was working to install the new Empire Drive Pump Station force main in the vicinity of
the existing WSACC force main. The new force main from the Empire Drive Pump Station
crosses the WSACC force main, and ties into a WSACC manhole for further conveyance
downstream. BRS located the existing WSACC force main before BRS began excavating in
this area. BRS excavated and exposed the existing force main on June 7, confirming its
location. Between June 7 and June 10, a storm caused muck to dislodge from the excavation
walls and accumulate around the existing WSACC force main. BRS broke the existing
WSACC force main on the morning of June 10,as they failed to carefully relocate the existing
WSACC force main as they were removing the muck from the excavation.
- The referenced WSACC pump station and force main were finished in 2011,and no upgrades
to this pump station are currently planned. The damage to the force main was caused by BRS
failing to relocate and protect the existing WSACC force main as they were installing the new
Empire Drive Pump Station force main.
Page 1 of 2

- BRS broke the pipe and contacted WSACC at approximately 8:45 am on June 10. BRS started
pumping the spilled wastewater into an adjacent manhole and created a catchment surrounded
by a berm to try to contain the spill. Some wastewater seeped through the catchment area and
made its way to surface water as documented in the spill report from WSACC to DEQ.
WSACC personnel arrived at the scene and closed an isolation valve, stopping the spill at
approximately 9:30 am. After WSACC closed the isolation valve, BRS finished dewatering
the catchment and repaired the damage that BRS had caused to the existing WSACC force
main. WSACC evaluated the downstream portions of Adams Creek to check for any adverse
effects to wildlife and found no evidence of fish kills or other adverse conditions which had
affected wildlife in Adams Creek.
- The Town of Mt. Pleasant Empire Drive Pump Station project includes installation of a new
pump station and force main. This is the only location where the existing WSACC force main
and new Empire Drive Pump Station force main will cross. BRS has completed work in this
area, so no further disturbance around the existing WSACC force main is anticipated as part of
the Empire Drive Pump Station project.
WSACC will continue to monitor this area, along with monitoring other areas throughout our system.
WSACC will also continue to be proactive to protect our facilities and to take all steps possible to prevent
future spills. Please let me know if you have any questions.
Sincerely,
Thomas Hahn,PE
Assistant Engineering Director
cc: Chad VonCannon, Engineering Director
Wayne Lyles, Interceptor Supervisor
Page 2 of 2

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