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Peabody Sage Creek Mine July 2014 <br />SL -3 Phase 111 Bond Release Request <br />approved as a permanent impoundment in TR -37. Monitoring wells TR3 and TR4 were <br />transferred to landowners, wells TR15 and WR 1 were reclaimed in August 2009 and the sites <br />inspected and approved in September 2009. CDRMS approved termination of the water <br />monitoring program with the approval of Technical Revision No 48 (TR 48) on August 20 2009. <br />H) Findings of the Protection of Hydrological Balance <br />The observed hydrological impacts at the PSCM are consistent with those predicted in the PHC <br />section of the permit package. With the exception of the occasional excursion of the aquatic life <br />selenium standard at Outfalls 002 and 004, water pollution is not occurring at the PSCM, and <br />there is no potential for future water pollution. Steam Site SSG2 (located downstream of Outfall <br />002) and steam Site SSF13 (located downstream of Outfall 004) are in compliance of the <br />selenium stream standard. <br />Water quality at the alluvial Ground Water Point of Compliance (GWPOC) wells is within the <br />prescribed limits, with the exception of iron at Well SFAL72. However, the high levels of iron <br />displayed at this Well SFAL72 are likely the result of naturally occurring organic matter and plant <br />debris present in the alluvium. Bedrock GWPOC wells were deemed to be not necessary, based <br />on the absence of the potential for the mine to negatively impact the quality of bedrock ground <br />water. <br />PSCM and Seneca have provided the CDRMS annual hydrology reports (AHRs) since 1980. <br />Additional hydrology data may be found in those reports. <br />References <br />Hem, John D. 1989. "Study and Interpretation of the Chemical Characteristics of Natural <br />Water" USGS Water Supply Paper 2254, Third Edition <br />EPA. 1976. "Quality Criteria for Water" <br />Seneca 11 and Peabody Sage Creek Mines. 1980 — 2013. "Annual Hydrology Reports" <br />REFERENCES <br />Hem, John D. 1989. "Study and Interpretation of the Chemical Characteristics of Natural Water" <br />USGS Water Supply Paper 2254, Third Edition <br />35 <br />