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QC Sample Results <br />Client: Coors Energy Company <br />Project/Site: Keenesburg Mine, CO <br />TestAmerica Job ID: 280 - 33543 -1 <br />Method: SM 2540C - Solids, Total Dissolved (TDS) (Continued) <br />Lab Sample ID: LCS 280 - 138358124 <br />Lab Sample ID: LCS 280 - 138879/2 <br />Client Sample ID: Lab Control Sample <br />Matrix: Water <br />Client Sample ID: Lab Control Sample <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 138358 <br />Prep Type: Total /NA <br />Analysis Batch: 138879 <br />Spike <br />LCS <br />Spike <br />LCS <br />LCS <br />Analyte <br />%Rec. <br />Analyte <br />Added <br />Result <br />Qualifier <br />Unit <br />D %Rec Limits <br />Total Dissolved Solids <br />500 <br />494 <br />100 99-101 <br />mg /L <br />99 86-110 <br />Lab Sample ID: LCSD 280 - 13887913 <br />Client Sample ID: Lab Control Sample Dup <br />Client Sample ID: Lab Control Sample Dup <br />Matrix: Water <br />Prep Type: Total /NA <br />Prep Type: Total /NA <br />Analysis Batch: 138879 <br />Spike <br />Spike <br />LCSD <br />LCSD <br />%Rec. RPD <br />%Rec. RPD <br />Analyte <br />Added <br />Result <br />Qualifier <br />Unit <br />D %Rec Limits RPD Limit • <br />Total Dissolved Solids <br />500 <br />500 <br />SU <br />mg /L <br />100 86-110 1 20 <br />Lab Sample ID: 280 - 33543 -6 DU <br />Client Sample ID: FPW <br />Client Sample ID: AMW -2 <br />Matrix: Water <br />Prep Type: Total /NA <br />Prep Type: Total /NA <br />Analysis Batch: 138879 <br />Sample Sample <br />Sample Sample <br />DU <br />DU <br />DU <br />RPD <br />RPD <br />Analyte Result Qualifier <br />Result <br />Result <br />Qualifier <br />Unit <br />D RPD Limit <br />Total Dissolved Solids 6800 <br />7.520 <br />6660 <br />SU <br />mg /L <br />2 10 <br />Method: SM 4500 H+ B - pH <br />Lab Sample ID: LCS 280 - 138358124 <br />Client Sample ID: Lab Control Sample <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 138358 <br />Spike <br />LCS <br />LCS <br />%Rec. <br />Analyte <br />Added <br />Result <br />Qualifier <br />Unit <br />D %Rec Limits <br />pH adj. to 25 deg C <br />7.00 <br />7.010 <br />SU <br />100 99-101 <br />Lab Sample ID: LCSD 280 - 138358/25 <br />Client Sample ID: Lab Control Sample Dup <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 138358 <br />Spike <br />LCSD <br />LCSD <br />%Rec. RPD <br />Analyte <br />Added <br />Result <br />Qualifier <br />Unit <br />D %Rec Limits RPD Limit <br />pH adj. to 25 deg C <br />7.00 <br />7.000 <br />SU <br />100 99-101 0 5 <br />Lab Sample ID: 280 - 33543 -1 DU <br />Client Sample ID: FPW <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 138358 <br />Sample Sample <br />DU <br />DU <br />RPD <br />Analyte Result Qualifier <br />Result <br />Qualifier <br />Unit <br />D RPD Limit <br />pH adj. to 25 deg C 7.51 <br />7.520 <br />SU <br />0.1 5 <br />TestAmerica Denver <br />Page 24 of 33 9/28/2012 <br />