NC0084549_Report_20240810

From:
Sasser, Gabe
To:
Bell, We
Cc:
Huber, John; Smith, Culbert; Eubanks, Ron; Wrobleski, Steven; Loyd, Jonah
Subject:
[External] Upset in Franklin WTP Residuals Process
Date:
Saturday, August 10, 2024 1:41:59 PM
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Hi Wes,
Hope you are doing well. As discussed in our conversation earlier, we experienced an upset in the
residuals process at Franklin this morning at approximately 5 a.m. The cause of the problem has
been identified. Initially, it appeared a failure in the residuals pumps were the cause of the issue,
but upon further investigation, a pneumatic plug blew out of the clarifier effluent line that directs
flow to the residuals wet well, thus creating a restriction of the flow of residuals to the influent
supply to the pumps. Maintenance staff reported to the plant to remove the blockage so the pumps
can function at full capacity, but the plug is lodged deep within the piping (approximately 10ft) and
the decision was made to wait till Monday to attempt to remove the plug from the line. I believe we
will enlist the help of Sanders Construction to help us dislodge and remove the pneumatic plug along
with installing a replacement mechanical plug to prevent a reoccurrence of the blowout that
happened this morning.
As the residuals pumps were compromised from the blockage, an overflow occurred at the manhole
above the wet well at the pump shed. This total volume of the spill is estimated to be 750 gallons
based upon the surface area of coverage and the depth of the material. We are estimating less than
a gallon made it to the tributary that feeds Stewart Creek. I believe Steve Wrobleski and Ron
Eubanks will be visiting the site to take a look later today.
As for the clean up efforts, CCI will report to Franklin later this afternoon to assist with containment
of the spill until they can clean up the area Monday. Thanks and take care.
Gabe Sasser / Operations Manager
CHARLOTTE WATER
5200 Brookshire Blvd. / Charlotte, NC 28216
P:704-399-2142 / C:704-507-5267 / charlottewater.ora