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Peabody <br />�91ENERGY <br />Peabody Sage Creek Mining, LLC <br />R�C;fJgV <br />PUG ® 8 Jp14 <br />oI Recla ety one <br />plvlsM cin9 & Sa <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 />August 6, 2014 <br />RE: Quarterly DMRs for CPDS Permit No. CO- 0048275, Peabody Sage Creek Mine <br />Dear Sir or Madam: <br />During review of the laboratory data collected at Outfall 002 while preparing discharge <br />monitoring reports (DMR) for the second quarter 2014 quarterly submittal for CDPS <br />Permit No. CO- 0048275, I discovered a maximum TDS value for the sample collected on <br />June 19, 2014 that was higher than any previous value measured at that outfall over its <br />extensive history, and subsequently requested our contract laboratory ACZ Laboratories <br />to re- analyze the sample in order to confirm the value. I received the revised laboratory <br />report on August 1, 2014, after submitting the second quarter 2014 DMRs. The revised <br />laboratory report indicates the original TDS value of 7,740 mg /L for the 6/19/14 sample <br />collected at Outfall 002 was in error, and the reanalysis of the same sample yielded a <br />TDS value of 3,870 mg /L. Accordingly, I have modified both the QRTR AVG value and <br />DAILY MAX value reported on the original page 2 of the DMR for Outfall 002 (002 -A) <br />and have enclosed a revised version with this submittal. You will see the two revised <br />TDS numbers are highlighted in yellow on the enclosed revised page 2 of the DMR for <br />Outfall 002. <br />I have attached a copy of my July 25, 2014 email to Scott Habermehl and his August 1, <br />2014 reply concerning my request to have ACZ Laboratories re- analyze TDS on the <br />6/19/14 sample collected at Outfall 002. I have also attached copies of pertinent pages <br />from the August 1, 2014 revised lab report including the Case Narrative Page and <br />Inorganic Analytical Results for NPDES2 collected on 6/19/14. On the Case Narrative <br />page, you will see ACZ Labs explanation regarding the original TDS value reported in <br />Item 2 (yellow highlight). I've also highlighted the data result for TDS that was <br />determined by ACZ Labs when they re- analyzed the sample Please call me at 928 -913- <br />9218, or email me at jcochran @peabodyenergy.com if you have any questions. <br />t ere y, Cochran <br />ody Energy <br />