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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0900161 <br /> Project: Foothill Landfill,San Joaquin County/124591 (Ground Water) Date Extracted: 01/21/2009 <br /> Sample Matrix: Water Date Analyzed: 01/21/2009 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: Batch QC Units: ug/L <br /> Lab Code: P0900186-004 Basis: NA <br /> Extraction Method: EPA 5030B Level: Low <br /> Analysis Method: 8260B Extraction Lot: PWG0900148 <br /> Batch QCMS Batch QCDMS <br /> PW G0900148-1 PWG0900148-2 <br /> Matrix Spike Duplicate Matrix Spike <br /> .Sample %Rec RPD <br /> Analyte Name Result Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> 1,1-Dichloroethane 0.98 12.2 10.0 112 11.4 10.0 104 61-140 7 26 <br /> 1,1-Dichlotoethene ND 11.2 10.0 112 10.7 10.0 107 48-153 5 26 <br /> 1,2,4-Trichlorobenzene ND 11.9 10.0 119 12.0 10.0 120 54-140 1 23 <br /> 1,2-Dichloroethane(EDC) ND 1.1.5 10.0 115 11.2 10.0 112 68-136 3 20 <br /> 1,2-Dichloropropane ND 11.9 10.0 .119 11.3 10.0 113 70-136 5 23 <br /> 1,4-Dichlorobenzene ND 11.4 10.0 114 11.3 10.0 113 67-138 1 22 <br /> Benzene ND 11.7 10.0 117 11.2 10.0 112 67-141 5 21 <br /> Carbon Tetrachloride ND 11.3 10.0 113 8.28 10.0 83 37-171 31 41 <br /> Chlorobenzene ND 11.4 10.0 114 10.9 10.0 109 67-136 4 24 <br /> Chloroform ND 11.7 10.0 117 11.1 10.0 111 66-150 5 25 <br /> Ethylbenzene ND 11.9 10.0 119 11.4 10.0 114 65-145 4 29 <br /> Methyl tert-Butyl Ether ND 21.1 20.0 105 20.3 20.0 101 65-141 4 22 <br /> Tetrachloroethene(PCE) 1.8 13.8 10.0 120 13.8 10.0 119 59-150 0 28 <br /> Toluene ND 11.8 10.0 118 11.6 10.0 116 66-139 1 25 <br /> Trichloroethene(TCE) 0.55 12.2 10.0 116 11.5 10.0 109 61-143 6 24 <br /> Vinyl Chloride ND 11.7 10.0 117 10.3 10.0 103 31-180 13 26 <br /> r <br /> Results flagged with an asterisk(*)indicate values outside control criteria. <br /> Results flagged with a pound(#)indicate the control criteria is not applicable. <br /> Percent recoveries and relative percent differences(RPD)are determined by the software using values in the calculation which have not been rounded. <br /> 21 <br /> Analyst:KMiller Form 3A-Organic Page 1 of 1 <br /> Printed: 01/23/2009 10:05:03 <br /> Pi\STEALTMCRYSTAL.RPT1Fonn3DMS.rpt SuperSetReference: RR15207 <br />