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not add to the arsenic levels in the surface water. <br />The copper concentration in the coal mine waste pile leachate is below detectable <br />levels. Due to the undetectable level of arsenic in the coal pile leachate, and insignificant <br />flow, it should not add to the selenium levels in the surface or surface water. <br />The iron concentration in the coal mine waste pile leachate is 3.1 mg/I. Due to the <br />insignificant flow of the leachate, flow from the leachate should not increase the iron <br />concentration in the surface water. <br />The lead concentration in the coal mine waste pile leachate is below detectable <br />levels. Due to the undetectable level of lead in the leachate, and insignificant flow, the iron <br />concentration should not increase in the surface water. <br />The manganese concentration in the coal mine waste pile leachate is 1.1 mg/I. Due <br />to the insignificant flow of the leachate, flow from the leachate should not increase the <br />manganese concentration in the surface water. <br />The mercury concentration in the coal mine waste pile leachate is below detectable <br />levels. Since mercury is not present in the coal pile leachate it will not increase the mercury <br />concentration in the surface water. <br />The selenium concentration in the coal mine waste pile leachate is below detectable <br />levels. Due to the undetectable level of selenium in the coal pile leachate, and insignificant <br />flow, it should not add to the selenium levels in the surface water. <br />Table N-9 is a summary of the water from the mine when it is discharging. The <br />maximum flow as previously calculated from the mine alone is 100 gpm (0.22 cfs). It is <br />important to note, the mine has not discharged any water since June of 2008. <br />Table N-9 <br />Mine Water Data Summary (mg/1) <br />AVERAGE <br />Arsenic <br />0.015 <br />Copper <br />0.017 <br />Iron <br />0.058 <br />Lead <br />0.075 <br />Manganese <br />0.033 <br />Mercury <br />No data <br />Selenium <br />0.182 <br />There are no parameters associated with the mine water discharge that are <br />substantially different than the those present in SW -1 or SW -8 (shown previously in Table <br />N-8), and therefore, the addition of mine water to East Salt Creek will not have a negative <br />impact on East Salt Creek. <br />Appendix N — PR -02 - 13 - 10/10 <br />