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2.05.6 Mitigation of the Impacts of Mining Operations <br />was 7.4 with a range of 7.3 to 7.5. The average field conductivity was <br />6,575 with a range of 6,500 to 6,700 umhos /cm. The average dissolved <br />manganese concentration is 0.857 mg /I. The total iron concentration is <br />below the method detection limit used by the laboratory. During the <br />second quarter the dissolved iron concentration was 0.0743 mg /I which is <br />slightly above the laboratories reporting limit of 0.07 mg /I. The monitoring <br />data shows an average total dissolved solids concentration of 5,840 mg /L. <br />The predicted coal leachate has a lower salt level (47.1 to 409 umhos /cm) <br />than the adjacent ground water measured at RW -1. Therefore, leachate <br />from the coal pile will not increase conductivity and TDS concentrations in <br />the groundwater in the vicinity of the coal pile. <br />The selenium concentration in the coal pile leachate is below the method <br />detection limit used by the analytical laboratory. RW -1 has a low selenium <br />concentration. The coal pile leachate should not add to the dissolved <br />selenium concentration in groundwater. <br />The manganese concentration in the coal pile leachate is 0.11 mg /I. RW- <br />1 has a dissolved manganese concentration of 0.857 mg /I. The coal pile <br />leachate should not increase the manganese concentration in the <br />groundwater. <br />The iron concentration in the coal pile leachate is 0.12 mg /I. RW -1 has a <br />dissolved iron concentration of 0.0743 mg /I. The coal pile leachate could <br />slightly increase the iron concentration in the groundwater. <br />Bedrock Groundwater <br />Bedrock groundwater will not be affected by the loadout operations. <br />Surface Water <br />As explained above in (b)(i), Sediment ponds will improve the quality of <br />the surface water flowing through and out of the proposed permit area and <br />adjacent area because sediment and water removed from the ponds will <br />be disposed of at an approved disposal facility. This will reduce the total <br />suspended solids in the surface water regime. Additionally the sediment <br />Permit Application 2.05 -59 01/12 <br />