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• <br />Bowie Resources, LLC <br />Bowie No. 2 Mine <br />2010 Annual Hydrology Report <br />AW-7 <br />Alluvial Well <br />Top of Pipe Elevation - 5950' <br />Depth -188' <br />Pipe 2.17' Above Ground <br />Ground Water <br />Initiated 9/9/1999 9/9/1999 9/9/1999 9/9/1999 <br />Activated 9/9/1999 9/9/1999 9/9/1999 9/9/1999 <br />Date 12/8/2010 9/22/2010 6/2012010 3130/2010 <br />Summary Information <br />• <br />Field <br />Parameters Baseline Operation <br />UNITS Min Ave Max Min Ave Max <br />Static Water Level Feet 50.59 73.48 97.52 80.92 78.42 63.69 69.48 <br />Water Elevation Feet 5852.5 5876.5 5899.4 5869.08 5871.58 5886.31 5880.52 <br />FieldComment <br />ph su 7.1 7.8 8.4 7.6 7.5 7.2 7.6 <br />Conductivity umhos/cm 300 1503 3100 3000 2900 2800 2600, <br />Temperature Celsius 10.3 12.6 14.5 10.3 11.3 12 12.1 <br />Lab <br />Parameters <br />UNITS <br />Bicarbonate mg/L <MDL 305.3 511.2 408.95 447.64 <br />Carbonate mg/L <MDL 8.3 33.0 <MDL <MDL <br />Chloride mg/L 13.0 59.3 248.4 248.43 170.16 <br />Conductivity umhos/cm 359 1727 3645 3620 2920 <br />Hardness mg/L <MDL 457.97 109120 596.28 491 <br />Acidity mg/L 3.0 3.5 4.0 3 4 <br />Nitrate-Nitrite mg/L <MDL 1.79 7.92 1.52 3.8 <br />Ammonia /L <MDL 0.084 0.231 0.18 0.071 <br />pH 7.4 8.0 8.6 7.5 7.7 <br />Phosphate /L <br />! <MDL 0.02 <br />0.06 <br />0.03 <br /><MDL <br />ResidueFilterable-TDS /L 200 1186 2254 2254 2077 <br /> <br />Sulfate /L <br />40.00 <br />489.63 <br />942.56 <br />786 <br />890 <br />Arsenic (Dissolved) mg/L <MDL 0.047 0.255 0.255 0.255 <br />Cadmium (Dissolved) mg/L <MDL 0.005 0.023 0.02 0.003 <br />Calcium (Dissolved) g <br />21.8 <br />64.1 <br />108.4 <br />84.6 <br />77.4 <br />Iron (Dissolved) <MDL 0.04 0.28 0.02 0.02 <br />Iron (Total) q 0.003 0.26 1.01 0.07 0.47 <br />Magnesium (Dissolved) 6.3 65.5 225.2 93.5 72.3 <br />Manganese (Dissolved) <MDL 0 0.004 <br />0.007 <br />Manganese (Total) <MDL 0 0.031 0.028 <br />Mercury (Dissolved) mg/L <MDL 0.00 0.00013 0.00031 <br />Selenium (Dissolved) mg/L <MDL 0 d 0.01 0.011 <br />Sodium (Dissolved) mg/L 46.7 2 <br />8 583 188 583 <br />Zinc (Dissolved) mg/L <MDL 0 0.021 0.03 <br />The area of concern for monitoring point AW-7 was affected by the mining operation before its establishment. Therefore, all <br />recorded monitoring events are considered operational. <br />Alluvial Wells AW-7 through AW-9 are located south of Old State Highway 133, near the entrance to the mine. <br />They were installed in 1999 as the result of PR-03. <br />• <br />There is no Baseline Collection possible for points initiated after the influence of mining. <br />Figure No. 163