2016-01-13_REPORT - C2009087 - Laserfiche WebLink

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Peabody Sage Creek Mining, LLC Page 3 12/14/2015 The selenium standard (4.6 ug/1) was exceeded a total of two times at one NPDES outfalls (Outfall 004) during the water year. A Notice of Violation/Cease and Desist Order, Number: I0-120912-1 was issued by CDPHE's WCQCD at the Peabody Sage Creek Mine on September 12, 2012. The CDPHE NOV was issued for Failure to Comply with Permit Effluent Limitations, Failure to Use Required Analytical Method, and Failure to Report Representative Monitoring Data. The effluent limitation was the above mentioned parameter on Potentially Dissolved Selenium. Based on the CDPS permit CO -0048275 issued to Peabody Sage Creek Mining, LLC, the effluent parameter is a 30 -day average of 4.6 ug/1 for potentially dissolved selenium. This parameter was exceeded during the 2013 water year at two outfalls, outfall 003 and outfall 004. Outfall 004 discharges both surface run-off and spoil spring water from an area which has no active disturbance and is currently in reclamation. Outfall 003 discharges surface run-off from the North Facilities Area. Based on a Memorandum of Understanding between the Division of Reclamation, Mining and Safety and the Water Quality Control Division (WQCD), the WQCD will be responsible for enforcing CDPS permit conditions. According to the 2014 ARR, PSCM is working with CDPHE to resolve this issue. Also, there was an exceedance of the total recoverable iron standard of 1.0 mg/1 in January of 2014 at outfall 004. Please see section 9 of this document for more information. 8. Basic Standards for CWQCC regulations The manganese standard was exceeded at seven sites Surface Water 31.1.11 during this water monitoring year. Based on CWQCC reg. 31, the standard of 0.2 mg/1, applies to plants grown in acidic soils (<6.0 pH). In alkaline soils, as found on the PSCM site, the EPA standard would be 10 mg/1. All