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HomeMy WebLinkAboutWQCS00025_NOI_NOV2021DV0445_Response_20211027i i" Water Resources Division 146 N Church Street PO Box iio6 Asheboro, NC 27204-lio6 October 27, 2021 i CITY OF A_ sHEBORO NORTH CAROL INA 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 to Notice of Violation & Intent to Issue Civil Penalty Tracking No.: NOV 2021-DV-0445 Dear Mr. Snider: Tel: 336-626-i2o1 Ext. 258 Fax:336-626-1218 NC Department of Enviro Received entalluality OCT 2 9 2021 Winston-c�'.F' Region3! -2 This letter is written in response to the above referenced letter of correspondence from your office for the sanitary sewer overflows (SSO's) experienced on August 7 and 18, 2021 at Lift Station Number 3, 1129 E. Mine Street due to inflow and infiltration related to heavy rainfall events. The SSO on August 7, 2021 at LS # 3 (Incident # 202101755) was due to I & I because of the heavy rainfall. The City of Asheboro Water Plant measured over 2" of rain in 3 hours. Our region was under a flash flood warning for this event and several flooded areas were reported. 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. The SSO on August 18, 2021 at LS # 3 (Incident # 202101779) was due to I & I because of the heavy rainfall associated with Tropical Storm Fred. Measured rain for this event was V on top of 1 " received over the previous three days. 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. The City is in the planning/design stage for an upgrade to this station. The City has been awarded funding from NCDEQ Division of Water Infrastructure and is waiting for the Engineering Report approval to complete design plans. This basin and each sub basin that flows into this station has been investigated to identify inflow/infiltration but no major sources have been identified. Including these SSO's over the past two months, the overall performance of our system is exemplary. The 2020 System Performance reveals that of the more than 1.5 billion gallons of wastewater treated at the City of Asheboro W WTP, less than 0.05% was spilled at the plant or in the collection system. Laboratory personnel sample after every SSO as soon as it is safe to do so. None of the laboratory results from any SSO on these two dates revealed significant environmental impact. Home of the NC Zoological Park Response to Notice of Violation & Intent to Issue Civil Penalty i' 10/27/2021 Page 2 of 2 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. The Capital Improvement Plan provides future resources for studies, repairs and replacements to the wastewater collection and treatment systems. The City is currently utilizing a grant from NCDEQ Division of Water Infrastructure to complete and Asset Inventory Assessment of our collection system. We have contracted with Freese & Nichols to complete and assessment of the system and provide an updated Capital Improvement Plan to prioritize future projects to eliminate SSO events. 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 contact me at (336) 626-1201 ext. 258. Sincerely, X44 Michael D. Rhoney, P.E. Water Resources Director OTYOF ASHEBOFO WATER RESOURCES