WQ0041626_NOV-2020-PC-0329 Response_20200925

MAYOR
HENRY CARROUTH
MAYOR PRO TEM
DREW SHARPE
TOWN CLERK
AMY ALBRIGHT
TOWN OF SWEPSONVILLE
2747 Darrell Newton Drive
Graham, NC 27253
[phone]
September 25, 2020
Mr. Lon T. Snider, Regional Supervisor
Winston Salem Regional Office
Division of Water Resources — NCDEQ
4050 West Hanes Mill Road, Suite 300
Winston-Salem, North Carolina 27105
Subject: Notice of Violation
Tracking No. NOV-2020-PC-0329
Exceedance of Hydraulic Capacity
Virginia Mills Pump Station (WQ0041626)
Alamance County
Dear Mr. Snider:
Town Council
TRAVIS SAPP
WILBUR SUGGS
JOHN ANDREWS
This letter is an update of our August 26th, 2020 response to the subject Notice of Violation letter
received July 28, 2020 which requests a written response from the Town providing a detailed description
of the corrective actions that will be implemented, along with an implementation schedule or action
items to resolve the capacity issues at the subject pump station.
Since our August 261" letter of response, which included a granted request for an additional 30 days to
provide clearer dates as to when some of the corrective actions would occur, the following has taken
place with updates in italics.
1. The Town installed flow meters August 5th and is currently metering the north and south side of
the collection system and submetering each. The Town along with its Engineer can monitor the
meter readings daily. The Town anticipates a report form Gavel and Dorn in September or
October 2020 depending upon whether we can capture a good rainfall event or two (hopefully
one locally and one regionally when the Haw River is near bank level). We believe results from
this metering study will aid the Town in targeting next steps of point repairs and sewer manhole
and line rehabilitation project.

The Town captured good rain data from the remnants of Hurricane Sally. We met earlier this
week with Gavel and Dorn to review the data collected to date. It appears that the largest dry
weather and wet weather flows are on the South side of Town. Yesterday meters were moved
from the north side of Town to the south side to better isolate 0. We believe that this will allow
the Town to better target its approved funding to address current 0 and effectively reduce the
current ADF seen at the Virginia Mills Lift Station.
2. The Town with its Engineer met with Charles Underwood Co., the pump station "trouble shooter"
August 6t" on site to review the goal of regaining pump station capacity. The Town received an
update on August 241" detailing suggested repairs to the existing pumps, which included a new
impeller and volute for each pump. The contractor is currently trying to locate replacement parts
to provide the Town with an update on parts availability and lead time.
The Town was unable to receive related scheduling of needed parts and costs in a timely manner
from Underwood and contacted Carver Plumbing, who has also worked on these pumps in the
past. Carver has provided the Town with a time schedule (45 to 60 days), and related costs
associated with replacing one volute and two impellers 9.625-inch impellers, wear rings, etc. It is
believed that these corrective actions (according to Underwood's report) will result in close to 420
GPM pumping capacity at around 90' of TDH or 0.2419 MGD exceeding the Average Daily Flow
provided of 0.2095 MGD. This should be the solution that brings the Town in compliance.
3. The Town with its Engineer held a preconstruction conference August 121" with Carolina Civil
Works (the Virginia Mills Pump Station replacement contractor). We expect to receive his project
schedule soon and have asked him to evaluate ways to possibly accelerate the project. The Town
has received a project schedule from Carolina Civil Works this past week and will begin evaluating
ways to possibly accelerate the project.
4. The Town with its Engineer met with C&J Utilities August 13t" to inspect the four air relief valves
on the Virginia Mills Pump Station force main. C&J previously repaired two of the air relief valves,
which seem to be operational, but the other two appear to need replacing. The Town has
approved C&J Utilities to replace the two remaining air relief valves and the work is scheduled to
take place as soon as the valves are delivered. The two air relief valves were replaced by C&J
Utilities on August 31Sr
In summary, the Town is prepared to initiate the related improvements/repairs to the existing pumps
with your concurrence that the new capacity will bring us in compliance with the State.
Sincerely,
Brad Bullis, Town Administrator
Cc: Troy King, PE —Alley, Williams, Carmen, & King, Inc. —[e-mail]