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HomeMy WebLinkAboutNC0025909_Schedule of Compliance_20240202Cif January 28, 2024 RECEIVED 02 z- NrDEQ/pWR/NPDES Rutherfordton A MINTED ORIGINAL NCDEQ / Division of Water Resources NPDES Permitting 1617 Mail Service Center Raleigh, NC 27699-1617 NCDEQ / Division of Water Resources Asheville Regional Office 2090 US 70 Highway Asheville, NC 28778 Re: NPDES Permit No. NCO025909 Schedule of Compliance To Whom It May Concern, The Town of Rutherfordton is the owner of the Town of Rutherfordton Wastewater Treatment. The recent NPDES Permit issued with an effective date of December 1, 2022 included a permit limitation for Nitrate Nitrogen. Also, included in the Permit was a Schedule of Compliance, Section A.(5.) which allowed the Town time to determine how the permit limit could be met. The first compliance activity required the Town to submit an Action Plan to the Division summarizing the strategy or actions to be taken to achieve compliance with the permit limitations for total copper, total silver, and total lead. The Town has included an Action Plan for review and approval. In accordance with Section A.(5.) of the Permit, attached for review and approval is an Action Plan the Town is proposing to achieve compliance with the Nitrate Permit limit. If our proposed strategy does not provide an acceptable approach, please advise. The Town is available for discussion at your convenience. If you have any questions or require additional information, please do not hesitate to contact me. Sincerely, 9 Doug Barrick Town Manager Cc: Phillip Reynolds, WWTP ORCNeolia Nadine Blackwell, Area ManagerNeolia Sent Certified Mail, Return Receipt Requested TOWN OF RUTHERFORDTON NPDES NCO025909 SCHEDULE OF COMPLIANCE, SECTION A.(5.) ACTION PLAN TO ACHIEVE COMPLIANCE WITH NITRATE LIMITATION Date Developed: December 2023 BACKGROUND During the 2022 NPDES Permit renewal process, the North Carolina Department of Environmental Quality provided the Town of Rutherfordton with a draft permit that included the following limit: Parameter Maximum Monthly Reasonable Potential Analysis Reported Average Limit (RPA) Decision Concentration Nitrate 17 mg/L 22.0 mg/L w. RP shown - apply Monthly Monitoring with Limit NCDEQ issued the NPDES Permit in final form with the proposed Nitrate limit. This limit was not included in the previous NPDES Permit which expired July 31, 2020. The effluent DMR data used by the State for the draft permit development was based on a single value of 17 mg/I. Strategy/Action To Achieve Compliance Proposed Completion Date To determine a representative level of Ongoing Nitrate in the effluent, conduct Effluent monitoring for Nitrate at a monitoring frequency of twice per month which is greater than the monthly monitoring frequency in the Permit. Evaluate the effluent Nitrate data and June 30, 2024 determine consistent compliance with the NPDES Permit limit. Evaluate treatment alternatives if the effluent October 31, 2024 Nitrate does not demonstrate consistent compliance with the monthly average Permit limitation of 22.0 mg/I Submit proposed treatment alternatives to December 1, 2024 NCDEQ