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Peabgq�IBN6RGY <br />Peabody Sage Creek Mining, LLC <br />�`v eo <br />�c <br />M� <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division <br />Permits and Enforcement Section <br />4300 Cherry Creek Drive South <br />Denver, CO 80246 -1530 <br />36600 Routt County Rd. 27 <br />PO Box 250 <br />Hayden, CO. 81639 <br />(970) 276 -7001 <br />January 22, 2014 <br />2-100q -n� <br />�SDry,� <br />RE: Quarterly DMRs for CPDS Permit No. CO- 0048275, Peabody Sage Creek Mine <br />Dear Sir or Madam: <br />Pursuant to the quarterly reporting requirements contained in Colorado Discharge Permit <br />CO- 0048275 for the Peabody Sage Creek Mine, enclosed please find the fourth quarter <br />2013 discharge monitoring reports for Outfalls 002, 003, and 004. In this quarter, all <br />three Outfalls discharged continuously. No excursions of DMR limits occurred during <br />the fourth quarter of 2013. <br />In addition to the 4t' Qtr DMRs, I've enclosed a revised DMR for Outfall 004 for the 2 °d <br />Quarter 2013. The revision is limited to a change in the previously reported values of 6.4 <br />ug/L for the 30 -Day Average and 6.4 ug/L for the Daily Maximum. During my review of <br />water quality data collected during 2013 as a result of field sampling conducted to <br />address the source and fate of selenium from Outfalls 002 and 004, I realized we had sent <br />a sample split collected at Outfall 004 on May 6, 2013 to the State of Colorado <br />Laboratory. The State Lab conducted selenium analyses on this sample split using EPA <br />Method 200.8, including the potentially dissolved method. The State Lab's analytical <br />result for potentially dissolved selenium on the split sample was 6.5 ug/L and just slightly <br />higher than the value previously reported on the 2 °d Qtr DMR for Outfall 004. Due to <br />this inadvertent oversight, I have accordingly revised the enclosed DMR for Outfall 004 <br />to show the higher result of 6.5 ug/L derived from the State Laboratory analysis. I have <br />also enclosed the laboratory reports generated by the State Lab for the Outfall 004 split <br />sample. <br />Please don't hesitate to contact me at (928) 913 -9218 or via email at <br />icochran@peabodyenergy.com if you have any questions or need additional information. <br />Si er y, <br />J hn Cochran <br />anager Environmental Hydrology <br />