2008-05-01_REPORT - C1996083 (4)

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• Bowie Resources, LLC Bowie No. 2 Mine 2007 Annual Hydrology Report B-Gulch-lo Drainage System Elevation - 5960 Surface Water Initiated 2/28/1995 2/28/1995 2/28/1995 2/28/1995 Activated 3/30/1997 3/30/1997 3/30/1997 3/30/1997 Date 11/26/2007 9/25/2007 6/26!2007 3/19/2007 • • Summary Information Field Baseline Operation r, e:., n..., nn~.. nn.., qua Mar Narameters ~~~~ ~ ~ ~~~~~~ ~„~ 0 ,.,~,. 0 ,...., 00 0 ...., 03 1 ...--- 13 13 0 0 0 1.875 Flow GPM 0 . . . FieldComment No Flow No Flow No Flow h su 6.5 8.0 8.8 7.0 Conductivity umhos/cm 730 4736 9800 6600 Temperature Celsius 0.5 12.8 24.6 12.6 Lab Parameters UNITS Bicarbonate mg/L 174 445 678 Chloride mg/L 27 93 225 Conductivity umhos/cm 1030 5664 9670 Hardness mg/L <MDL 2095 3930 Nitrate-Nitrite mg/L 0.12 10.91 20.70 Oil and Grease mg/L <MDL 19.70 29.40 pH su 8.0 8.3 8.5 Phosphate mg/L <MDL 0.2 0.8 ResidueFilterable-TDS mg/L 630 6133 10400 ResidueNonFilterable-TSS mg/L <MDL 4818 34500 SAR <MDL 3.36 11.40 Sulfate mg/L 270 3232 6620 Aluminum mg/L <MDL 30 148 Arsenic mg/L <MDL 0.058 0.400 Cadmium mg/L <MDL 0.009 0.04 Calcium m /L 101 307 854 Cop er mg/L <MDL 0.1 0.6 Iron (Total) mg/L <MDL 31 149 Lead mg/L <MDL 0.12 0.48 Magnesium mg/L 27.2 435.1 773.0 Man anese Total) mg/L <MDL 0.6 3.8 Mercu mg/L <MDL 0.0001 0.0003 Molyebdenum mg/L <MDL <MDL <MDL Selenium mg/L <MDL 0.123 0.462 Sodium mg/L 142 921 1540 Zinc mg/L <MDL 0.45 1.70 The Lower B Gulch monitoring point is just above Sediment Pond 8. Atl flows in this Gulch flow into this Sediment Pond. This point exhibited no flows before the construction of the mine. The mine construction and now the mine operation provide flow to this gulch. Baseline Information for B-Gulch-lo is derived from events beginning on 2/28195 through 3/30/97. Point influenced by mining on 3/30197. Figure No. 82