WQCS00025_NOI_NOV2021DV0042_Response_20210210

S
Water Resources Division
146 N Church Street
PO Box iio6
Asheboro, NC 27204-iio6
February 10, 2021
i
CITY OF
AsHIPRORO
N O R T H C A R O L I N A
Mr. Lon T. Snider
NC Department of Environmental Quality
Division of Water Resources
450 Hanes Mill Rd
Suite 300
Winston-Salem, North Carolina 27105
Re: Response to2NjoaI;&a0"aJ1Ag&&1ntent to Issue Civil Penalty
Tracking N • NOV 2021-DV-004
f =Ilii rer,ii
Tel: [phone]oi Ext. 258
Fax: [phone]
NC Department of
Environmental Quality
Received
FEB 16 2021
Winston-Salem
Regional Office
This letter is written in response to the above referenced letter of correspondence from your office
for sanitary sewer overflow (SSO) Incident Number 202002769, October 11, 2020 at 1129 E Mine
Street, Lift Station # 3, as a result of inflow and infiltration and a severe natural condition.
The City of Asheboro received 2.85" of rain on Saturday and Sunday October 11 & 12, 2020 as
the remnants of Hurricane Delta passed through causing heavy rainfall. Maintenance staff
responded to the alarm and evaluated the site to monitor the flow. Laboratory sampling was
conducted upstream and downstream of the site and no environmental impact was measured.
Temperature, pH, DO, Conductivity, and Ammonia sampling of the stream reveal no real
environmental impact on Dissolved Oxygen (DO), pH, Ammonia (NH3), and Conductivity (Con)
as illustrated in the following table for upstream (US), at the site (S) and downstream (DS)
monitoring.
DO
DO
DO
pH
pH
pH
NH3
NH3
NH3
Con
Con
Con
Station
US
S
DS
US
S
DS
US
S
DS
US
S
DS
LS # 3
8.4
8.2
1 8.0
5.9
1 6.0
1 6.0
1 <.15
<.15
1 <.15
49.7
51.4
36.6
There was no need for remediation because the spill consisted mostly of rainwater and washed
away with runoff. The City is still in the design stages of upgrading/replacing this lift station and
exploring the best financing option for construction.
The City of Asheboro is committed to protecting the environment and improving wastewater
collection service to customers. We are working from many angles to address issues that will
improve the operation of our collection system. Staff is continuing flow monitoring and will be
aggressive in locating potential I & I sources and making repairs. Flow monitoring is ongoing in
other lift station basins. Flow monitoring has not revealed any major sources of I & I yet all
sources located have been repaired. The Capital Improvement Plan provides future resources for
Home of the NC Zoological Park

Response to Notice of Violation & Intent to Issue Civil Penalty
2/10/2021
Page 2 of 2
studies, repairs and replacements to the wastewater collection and treatment systems. We have
received funding for and AIA grant that will assist in prioritizing capital projects that will improve
the performance of the sanitary sewer collection system.
Including this SSO, the overall performance of our system is exemplary. Of the more than 1.5
billion gallons of wastewater treated at the City of Asheboro WWTP, less than 0.01% was spilled
at the plant or in the collection system in 2020. Laboratory personnel sample after every SSO as
soon as it is safe to do so. None of the laboratory results from this SSO event revealed significant
environmental impacts.
Please take these efforts into consideration as you deliberate these matters. The City requests
NCDEQ refrain from taking enforcement action as a result of these incidents. The City of
Asheboro takes pride in being good stewards of the environment and is taking measures to ensure
water quality in our community. Thank you for your consideration in this matter. If you have any
questions, please c6iitactme af(336)-626=1201 ext. 258: -" `-" -
Sincerely,
Michael D. Rhoney, P.E.
Water Resources Director
CITY OF
ASHEBOfU
WATER RESOURCES