2014-07-11_REPORT - C1980007 - Laserfiche WebLink

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West Elk Mine 2013 Annual Hydrology Report 47 4.6.1 Outfall 007 (Waste Water Treatment Pond (WWTP) Outfall 007 is an internal domestic wastewater discharge point that flows into pond MB- 5E that discharges through Outfall 004. Discharge from Outfall 007 met permit requirements in the first, second, and third quarters of 2013 (MCC, 2014). The fecal coliform daily maximum was exceeded at Outfall 007A on December 31, 2012 as reported by telephone and in correspondence to Ms. Kelly Morgan, WQCD, dated January 15, 2013. "On December 31, 2012 MCC notified the Division by telephone of a fecal coliform daily limit exceedance reported by the laboratory for a sample from Outfall 007. Two subsequent analyses of samples from Outfall 007 both showed fecal coliform results of 0.0 colonies /I00ml. The disinfection system in the WWTP was found to be in working order the day prior to and since the reported fecal coliform exceedance. MCC noted that the same sample with the reported fecal coliform exceedance was reported to have an undetected BOD measurement. Also, although not believed to be the reason for the exceedance, MCC has been working to address a sludge health issue in the WWTP. As was mentioned in the telephone notification, MCC sent a sludge sample to Dr. Michael Richards of Wastewater Microbiology, LLC for analysis. Dr. Richards continues to advise MCC as we work to lower the plant's Mixed Liquor Suspended Solids concentration. This will produce a "younger" sludge and an overall healthier wastewater treatment process. " (MCC, 2014). 4.6.1 Outfall 014 Discharge from pond SG -1 through Outfall 014 met permit requirements in the first quarter of 2013 (MCC, 2014). There was no discharge from this outfall in the fourth quarter of 2012 or the second or third quarters of 2013 (MCC, 2014). 4.6.2 Outfalls 004, 005, 008, 009, 011, 012, 013, 015, 016, 017, 018, and 019 There were no discharges from Outfalls 004, 005, 008, 009, 011, 012, 013, 015, 016, 017, 018, or 019 in WY 2013 (MCC, 2014). 5.0 ASSESSMENT OF MINE - INDUCED HYDROLOGIC IMPACTS IN WY 2013 AND ANTICIPATED IMPACTS IN WY 2014 5.1 Surface Water MCC maintains a network of 23 stream flow gauging stations and 8 temperature monitoring stations throughout the permit and lease areas (Table 3, Map 2). Daily mean surface water flow summary tables are presented in Appendix A. Surface water flow June 2014 IlydroGeo, Inc.