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West Elk Mine 2008 Annual Hydrology Report 64 <br />• compared to the baseline maximum of 0.0006 mg/l; elevated dissolved manganese, 0.136 mg/l, <br />compared to the baseline maximum of 0.101 mg/l, and elevated pH, 8.19 s.u., compared to the <br />baseline maximum of 8.1 s.u. The Lower Dry Fork Alluvial Well had elevated dissolved arsenic <br />0.029 mg/1 compared to the baseline maximum of 0.0004 mg/l; elevated conductivity of 578.5 <br />gmhos/cm compared to the maximum baseline value of 497 gmhos/cm; elevated levels of <br />dissolved magnesium, 16.2 mg/l, compared to the baseline maximum of 16.0 mg/1, elevated pH of <br />8.14 s.u. compared to the maximum baseline of 8.0 s.u.; elevated sodium absorption ratio (SAR) of <br />4.307 compared to the baseline maximum of 1.45; elevated dissolved sodium of 46.2 mg/1 <br />compared to the baseline maximum of 46 mg/l; and elevated sulfate of 107.02 mg/l compared to <br />the baseline maximum of 20 mg/l. Well SOM 80 had an elevated conductivity of 956.2 µmhos/cm <br />compared to the maximum baseline value of 897 µmhos/cm. Well SOM 23-H-4 had elevated <br />ammonia of 1.23 mg/1 compared to the baseline maximum below lab detection limits (<0.01 mg/1); <br />elevated dissolved arsenic of 0.049 mg/l compared to the baseline maximum of 0.003 mg/l; <br />elevated dissolved boron of 0.41 mg/l compared to the baseline maximum of 0.30 mg/l; elevated <br />dissolved cadmium of 0.006 mg/l compared to the baseline maximum of below lab detection <br />limits(<0.005 ,g/1); elevated hardness of about 76 mg/l compared to the baseline maximum of 21 <br />mg/l; elevated total iron of 4.34 mg/l compared to the baseline maximum of 1.75 mg/l; elevated <br />dissolved lead of 0.006 mg;/l compared to the baseline maximum of 0.0017 mg/l; elevated <br />dissolved magnesium of 15.9 mg/l compared to the baseline maximum of 1.9 mg/l; elevated total <br />manganese of 0.145 mg/l compared to the baseline maximum of 0.070 mg/l; elevated nitrite as N <br />dissolved of 0.01 mg/1 compared to the baseline maximum of below lab detection limits (<0.01 <br />mg/1); and elevated dissolved sodium of 564 mg/l compared to the baseline maximum of 487 mg/l. <br />The sample analysis for SOM-23-H-4 is considered suspect. Well SOM 23-H-3 had elevated <br />ammonia of 0.48 mg/I compared to the baseline maximum of 0.09 mg/l; elevated dissolved arsenic <br />of 0.046 mg/1 compared to the baseline maximum of below lab detection limits (<0.001 mg/1); <br />elevated dissolved cadmium of 0.007 mg/l compared to the baseline maximum of below lab <br />detection limits (<0.005); slightly elevated dissolved lead of 0.005 mg/l compared to the baseline <br />maximum of 0.0046 mg/l; elevated nitrite as N dissolved of 0.02 mg/1 compared to the baseline <br />maximum of below lab detection limits (<0.01 mg/1); slightly elevated pH of 8.95 s.u. compared to <br />the baseline maximum of 8.9 s.u.; and slightly elevated dissolved potassium of 3.48 mg/1 compared <br />to the baseline maximum of 3.3 mg/l. Well 3-11-01 had elevated dissolved arsenic of 0.055 mg/l <br />compared to the baseline maximum of 0.0010 mg/l; elevated dissolved cadmium of 0.005 mg/l <br />• compared to the baseline maximum of below lab detection limits (<0.005 mg/1); elevated <br />conductivity of 3082.3 µmhos/cm compared to the maximum baseline value of 2,730 µmhos/cm, <br />June 2009 HydrOGeo, Inc.