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Yoast Mine AHR 2020 <br /> Review of Annual Hydrology Report <br /> Mine: Yoast Mine Date Reviewed: 28 May 2021 <br /> Permit No: C-1994-082 Reviewed By: R. Reilley M.S,GISP <br /> Report Year: 2020 Submitted By: Seneca Property, LLC <br /> Date Received: 31 March 2021 <br /> Water Year 2019 October through 2020 September <br /> Requirement Requirement citation Comment <br /> 1. Filing frequency of CDRMS regulation The Annual hydrology Report is required to be <br /> hydrology report 4.05.13(4)(c) submitted yearly. <br /> 2. Timely filing of hydrology CDRMS regulation The Annual hydrology Report is required to be <br /> report 4.05.13(4)(c) submitted by February 28 and was received by the <br /> Division on 31 March 2021 via electronic filling. <br /> 3. Filing frequency of NPDES permit COG- Filling is monthly,and were not relayed to DRMS in a <br /> NPDES Discharge Monitoring 0000221 timely manner. <br /> Reports <br /> 4. Timely filing of Discharge NPDES permit COG- Filling is monthly, and were not relayed to DRMS in a <br /> Monitoring Reports 0000221 timely manner. <br /> 5. Sampling frequency of NPDES permit COG- It appears that frequency for sampling was complied <br /> NPDES outfalls 0000221 with. <br /> 6. Parameters to be sampled NPDES permit COG- All parameters were met. <br /> for NPDES reporting 0000221 <br /> 7. NPDES discharge NPDES permit COG- The Yoast Mine discharged from Ponds 010, 011, 012, <br /> limitations 0000221 013,and 014 during the 2020 water year. According to <br /> the report no exceedances were noted. <br /> Based on a Memorandum of Understanding between the <br /> Division of Reclamation, Mining and Safety and the <br /> Water Quality Control Division (WQCD), the WQCD <br /> will be responsible for enforcing CDPS permit <br /> conditions. <br /> 2 <br />