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Bowie Resource, LLC Surface Water <br />Bowie No. 2 Mine <br />2012 Annual Hydrology Report S7 -4 <br />Steven's Gulch - Spring 7 -4 <br />Elevation - 7780 <br />Initiated <br />Activated <br />Date <br />7/1/1983 <br />7/1/1983 <br />7/1/1983 <br />7/1/1983 <br />1 <br />11.13 <br />10/11/2012 <br />8/8/2012 <br />6/27/2012 <br />4/10/2012 <br />Summary Information <br />Field <br />Parameters <br />Baseline Operation <br />UNITS Min Ave Max Min Ave Max <br />Flow <br />GPM <br />0.00 <br />1.80 <br />11.13 <br />0.110 <br />0.120 <br />0.000 <br />0.170 <br />Temperature <br />Celsius <br />8.1 <br />12.1 <br />24.3 <br />6.6 <br />8.1 <br />8.3 <br />Conductivity <br />umhos /cm <br />250 <br />336 <br />530 <br />340 <br />350 <br />270 <br />pH <br />su <br />6.6 <br />7.5 <br />8.2 <br />7.4 <br />7.6 <br />7.7 <br />Field Comments <br />Damp <br />Lab <br />Parameters <br />UNITS <br />Bicarbonate <br />mg /L <br />40.9 <br />155.3 <br />225.7 <br />Chloride <br />mg /L <br /><MDL <br />7.58 <br />22.33 <br />Conductivity <br />umhos /cm <br />226 <br />286 <br />353 <br />Hardness <br />mg /L <br />124.53 <br />149.11 <br />184.00 <br />Nitrate - Nitrite <br />mg /L <br /><MDL <br /><MDL <br /><MDL <br />Oil and Grease <br />mg /L <br /><MDL <br /><MDLI <br /><MDL <br />pH <br />su <br />6.6 <br />7.4 <br />8.2 <br />Phosphate <br />mg /L <br /><MDL <br /><MDL <br /><MDL <br />ResidueFilterable -TDS <br />mg /L <br />172 <br />218 <br />305 <br />ResidueNonFilterable -TSS <br />mg /L <br />11 <br />35 <br />52 <br />SAR <br />0.25 <br />0.77 <br />2.63 <br />Sulfate <br />mg /L <br /><MDL <br />8.71 <br />14.82 <br />Aluminum (TREC) <br />mg /L <br />0.024 <br />0.024 <br />0.024 <br />Arsenic (TREC) <br />mg /L <br />0.026 <br />0.026 <br />0.026 <br />Cadmium (TREC) <br />mg /L <br />0.02 <br />0.02 <br />0.02 <br />Calcium (TREC) <br />mg /L <br />25.30 <br />25.30 <br />25.30 <br />Copper (TREC) <br />mg /L <br />0.01 <br />0.01 <br />0.01 <br />Iron (TREC) <br />mg /L <br />0.35 <br />0.47 <br />0.58 <br />Lead (TREC) <br />mg /L <br />0.04 <br />0.04 <br />0.04 <br />Magnesium (TREC) <br />mg /L <br />13.0 <br />15.0 <br />18.0 <br />Manganese (TREC) <br />mg /L <br />0.01 <br />0.01 <br />0.01 <br />Mercury (TREC) <br />mg /L <br />0.00007 <br />0.00007 <br />0.00007 <br />Molybdenum (TREC) <br />mg /L <br />0.002 <br />0.0021 <br />0.002 <br />Selenium (TREC) <br />mg /L <br />0.018 <br />0.018 <br />0.018 <br />Sodium (TREC) <br />mg /L <br />12.99 <br />12.99 <br />12.99 <br />Zinc (TREC) <br />mg /L <br />0.01 <br />0.01 <br />0.01 <br />The area of concern for monitoring point S7 -4 has not been affected by the mining operation. Therefore, all recorded <br />monitoring events are considered Baseline. <br />Baseline Information Collection initiated on 7/1/83 and net yet considered complete. <br />Point S7 -4 has not been influenced by mining. <br />Figure No. 66 <br />