WQCS00057_NOI_NOV2020DV0442_Response_20201008

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City of Thomasville
Thomasville, North Carolina 27360
20 lam
`N CARp1
Lon T. Snider
Regional Supervisor
WQROS, WSRO, DWQ, NCDEQ
450 W. Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
RE: Intent to Enforce Letter Response
Incident Number 202002221
Nat-aoao _ Q�-Oy�'�
NC Department of
Environmental Quality
Received
OCT 13 2020 I
Winston-Salem
Regional Office
Utilities Department
08 October 2020
Dear Mr. Snider,
In response to the letter of Intent to Enforce of 29 September 2026 the City, of Thomasville asks
that the following be taken into consideration:
Regarding incident # 202002221: Please find enclosed a chart of the rainfall recorded in 15-minute
increments at the station nearest to and in the same sewershed as the East Davidson Pump Station. The
intensity of the rainfall was overwhelming with 1.9 inches in just the first 30 minutes, followed by 0.77
inches over the next 45 minutes. This sudden volume of precipitation overwhelmed not only the
sanitary sewer system, but the storm drain systems of Thomasville as well and resulted in flash flooding
across the city. The fact that this in only lasted for one hour and forty-five minutes indicates that
inflow from the storm deluge entered into sanitary sewer collection system overwhelmed the East
Davidson pump station. There were no known impacts to public health, fish kills, or recreational area
closures as a result of this spill.
Rehabilitation of.the SouthHamby Creek Outfall that leads into this station is listed in the city's
Capital Improvement Plan as adopted by Council. This project should help to reduce I&I and the
resultant spills at this pump station: The City of Thomasville has spent and will continue to spend
millions of dollars to protect the environment by identifying and correcting deficiencies in the collection
system.
The City of Thomasville asks that the extremely precipitation that both preceded and occurred
during this event as well as the ongoing efforts to upgrade all aspects of the sanitary sewer collection
system be taken into account with any enforcement action.considered.
Sincerely, ,>
C
CC:Ke Craver
Morgan Huffman
Public Services Director
City of Thomasville
336-475-4220

t
TimberCreek
Rainfall from 7/1/2020to 7/25/2020
Device Time Rainfall Amount (inches)
7/23/2020 16:00 0
7/23/2020 16:15 0
7/23/2020 16:30 0.
7/23/2020.16:45 OT67
7/23/2020 17:00 1.23
7/23/2020 17:15 0.412.76 inches
7/23/202017:30 0.19 "
7/23/202017:45 0.1,7
7/23/2020 18:00 0.09
7/23/2020 18:15 0.01
7/23/2020 18:30 0.01
7/23/2020 18:45 0.02
7/23/2020 19:00 0
7/23/2020 19:15 0
7/23/2020 19:30 0.04 '
7/23/2020 19:45 0.04
7/23/2020 20:00' 0
7/23/2020 20:15 0
7/23/2020 20:30 0
7/23/2020 20:45 0
7/23/2020 21:00 0.01
7/23/20202.1:15 0
7/23/2020 21:30. 0 j
7/23/2020 21:45 0 �.
7/23/2020 22:00 0
7/23/2620 22:15 0
7/23/2020 22:30 0
7/23/2020 22:45 0
7/23/202.0 23:00 0
7/23/2020 23:15 0
'7/23/2020 23:30 0
7/23/2020 23:45 0
7/24/2020 6:00 0.
l[otal:..-_. - -

1ON12020
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