WQCS00057_NOI_NOV2021DV0246_Response_#2_20210527

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City of Thomasville
'Thomasville, North Carolina 27366
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Lon T. Snider
Regional Supervisor
DWQ, NCDEQ
450 W. Hanes Mill Road, Suite 300
Wins ton -Salem, NC 27105
RE: Intent to Enforce Letter Response
'Incidents Number 202100869
NC Department of >
Environmental Quality
Received
JUN 01 2021
Winston-Salem
Regional Office
Utilities Department
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Dear Mr. Snider,
-,, , , In response to the letter of Intent to Enforce of 18 May 2021 the City ofThomasvilleasks that
the following be taken into consideration:
Regarding the incident # 202100869: There are known issues with Inflow and Infiltration in the
collection system leading to the pump station just downstream of Veach Farm Road. A study was
commissioned through consulting engineers Alley Williams Carmen and King that determined that while
I&I is higher than expected for the sewersheds involved, the pump station itself appears to be
undersized for the existing flow. An RFQ was issued for holistic upgrades to the pump station, force
main, and downstream systems and Alley Williams Carmen and King has been selected to design
upgrades to these systems to better meet current and future demand.
Previous efforts to identify sources of I&I for remediation have included smoke testing of the
sewersheds and cleaning and video inspection of the main outfall and trunk lines in the sewersheds in
this part of the collection system. Currently, Duke's Root Control is under contract to perform iTracker
Microdetection in the sewersheds involved to theoretically "pinpoint" the worst sources of I&I in the
collection system for remediation. This project is to begin the week of June 2V, 2021 and will likely
take several months to gather the necessary data and have it evaluated. Initial results may then
necessitate a second round of iTracker device placement, data gathering, and analysis.
There were no known impacts to public health, fish kills, or recreational area closures as a result of this
spill.
The above statements are to share with you that the City of Thomasville is taking steps to address the
issues that led to this spill and to help prevent recurrences of same. 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 ongoing efforts to upgrade
this area of the sanitary sewer collection system be taken into account with any enforcement actions
considered.
Sincerely, ' )
CC: Michael Br ndt /
Morgan Huffman
Public Utilities Director
City of Thomasville
336-475-4220