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QC Sample Results <br />Client: Coors Energy Company TestAmerica Job ID: 280 - 46536 -1 <br />Project/Site: Coors - Keenesburg Mine, CO 80643 <br />Method: SM 2320B - Alkalinity (Continued) <br />Lab Sample ID: 280 - 46536 -A -1 DU Client Sample ID: FPW <br />Matrix: Water Prep Type: Total /NA <br />Analysis Batch: 191869 <br />Sample Sample DU DU RPD <br />Analyte Result Qualifier Result Qualifier Unit D RPD Limit <br />Alkalinity 180 177 mg /L - - 0.2 10 <br />Method: SM 2510B - Conductivity, Specific Conductance <br />Lab Sample ID: MB 280 - 191881/5 <br />Client Sample ID: Method Blank <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 191881 <br />• <br />MB MB <br />Analyte <br />Result Qualifier <br />RL Unit <br />D Prepared Analyzed Dil Fac <br />Specific Conductance <br />ND <br />2.0 umhos /cm 09/17/13 17:12 1 <br />Lab Sample ID: LCS 280 - 191881/3 <br />Client Sample ID: Lab Control Sample <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 191881 <br />Spike <br />LCS LCS <br />%Rec. <br />Analyte <br />Added <br />Result Qualifier <br />Unit D %Rec Limits <br />Specific Conductance <br />1410 <br />1390 <br />mhos /cm 99 90 - 110 <br />Lab Sample ID: LCSD 280 - 191881/4 <br />Client Sample ID: Lab Control Sample Dup <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 191881 <br />Spike <br />LCSD LCSD <br />%Rec. RPD <br />Analyte <br />Added <br />Result Qualifier <br />Unit D %Rec Limits RPD Limit <br />Specific Conductance <br />1410 <br />1380 <br />umhos /cm 98 90 - 110 1 10 <br />Lab Sample ID: 280 - 46690 -A -1 DU <br />Client Sample ID: Duplicate <br />Matrix: Water <br />Prep Type: Total /NA <br />Analysis Batch: 191881 <br />Sample Sample <br />DU DU <br />RPD <br />Analyte <br />Result Qualifier <br />Result Qualifier <br />Unit D RPD Limit <br />Specific Conductance <br />690 <br />690 <br />umhos /cm 0.3 10 <br />Method: SM 2540C - Solids, Total Dissolved (TDS) <br />Lab Sample ID: MB 280 - 192222/1 Client Sample ID: Method Blank <br />Matrix: Water Prep Type: Total /NA <br />Analysis Batch: 192222 <br />MB MB <br />Analyte Result Qualifier RL Unit D Prepared Analyzed Dil Fac <br />-- - - - - - - -- -- - -- - <br />ota isso ved —Solids ND 10 mg /L —09/19/1311-06-- <br />9/19/13 1106 1 <br />Lab Sample ID: LCS 280 - 192222/2 Client Sample ID: Lab Control Sample <br />Matrix: Water Prep Type: Total /NA <br />Analysis Batch: 192222 <br />Spike LCS LCS %Rec. <br />Analyte Added Result Qualifier Unit D %Rec Limits <br />- - - -- — - — <br />Total Dissolved Solids 501 492 -mg-/-L 98 - -- 86 _ 11- 0 <br />TestAmerica Denver <br />Page 21 of 32 <br />