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Detection Summary <br />Client: Coors Energy Company <br />Project/Site: Keenesburg Mine, CO <br />TestAmerica Job ID: 280 - 30603 -1 <br />Client Sample ID: AMW -2 (Continued) Lab Sample ID: 280 - 30603 -6 <br />Analyte <br />Result Qualifier <br />RL <br />Unit <br />Dil Fac D <br />Method <br />Prep Type <br />Calcium <br />450 <br />0.20 <br />mg /L <br />1 <br />200.7 Rev 4.4 <br />Dissolved <br />Magnesium <br />170 <br />0.20 <br />mg /L <br />1 <br />200.7 Rev 4.4 <br />Dissolved <br />Manganese <br />2.2 <br />0.010 <br />mg /L <br />1 <br />200.7 Rev 4.4 <br />Dissolved <br />Sodium <br />1600 <br />5.0 <br />mg /L <br />1 <br />200.7 Rev 4.4 <br />Dissolved <br />Sodium Adsorption Ratio <br />15 <br />0.40 <br />No Unit <br />1 <br />20B <br />Total /NA <br />Sodium <br />1500000 <br />1000 <br />ug /L <br />1 <br />20B <br />Total /NA <br />Calcium <br />440000 <br />200 <br />ug /L <br />1 <br />20B <br />Total /NA <br />Magnesium <br />180000 <br />200 <br />ug /L <br />1 <br />20B <br />Total /NA <br />Hardness as calcium carbonate <br />1800 <br />1.3 <br />mg /L <br />1 <br />SM 2340B <br />Dissolved <br />Chloride <br />400 <br />60 <br />mg /L <br />20 <br />300.0 <br />Total /NA <br />Sulfate <br />4000 <br />500 <br />mg /L <br />100 <br />300.0 <br />Total /NA <br />Alkalinity <br />760 <br />5.0 <br />mg /L <br />1 <br />SM 2320B <br />Total /NA <br />Bicarbonate Alkalinity as CaCO3 <br />760 <br />5.0 <br />mg /L <br />1 <br />SM 2320B <br />Total /NA <br />Specific Conductance <br />7900 <br />2.0 <br />umhos /cm <br />1 <br />SM 2510B <br />Total /NA <br />Total Dissolved Solids <br />6500 <br />100 <br />mg /L <br />1 <br />SM 2540C <br />Total /NA <br />pH adj. to 25 deg C <br />6.99 HF <br />0.100 <br />SU <br />1 <br />SM 4500 H+ B <br />Total /NA <br />TestAmerica Denver <br />Page 8 of 31 7/16/2012 <br />