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Peabody Energy, LLC <br />Page 6 <br />2018 <br /> <br /> <br />Requirement Requirement citation Comment <br /> Compliance standard for Sage Creek alluvium or <br />Grassy Creek Alluvium. No material damage has <br />occurred, as discussed in item 20, above. <br />24. Agreement of observed <br />hydrologic impacts with <br />"probable hydrologic <br />consequences" projected in <br />mining <br />CDRMS regulation <br />2.05.6(3) and <br />requirement to keep <br />current, CDRMS <br />regulation 2.03.3(1) <br />No local or regional impacts were identified in the <br />AHR. This observation is consistent with the PHC. <br /> <br />It is noted that the exceedances of the CDPHE <br />selenium standard may need to be included in a <br />revised PHC section of the permit. A determination <br />should be made based on the NPDES Compliance <br />Schedule to meet the selenium limit by December 31, <br />2015 associated with the NPDES permit. <br />25. Adequacy of ground <br />water monitoring program <br />CDRMS regulation <br />4.05.13(1) <br />The current ground water monitoring program <br />continues to adequately address the protection of the <br />hydrologic balance. <br />26. Adequacy of surface <br />water monitoring program <br />CDRMS regulation <br />4.05.13(2) <br />The current surface water monitoring program <br />continues to adequately address the protection of the <br />hydrologic balance. <br /> <br /> <br /> <br /> <br /> <br />Please feel free to contact me with any questions. <br />Sincerely, <br /> <br />Robin Reilley M.S. GISP <br />Environmental Protection Specialist <br />robin.reilley@state.co.us <br /> <br />