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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0800193 <br /> Project: Foothill Landfill, San Joaquin County/]24591 (Leachate Module) Date Extracted: 02/13/2008 <br /> Sample Matrix: Water Date Analyzed: 02/13/2008 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: Batch QC Units: ug/L <br /> Lab Code: P0800237-014 Basis: NA <br /> Extraction Method: EPA 5030B Level: Low <br /> Analysis Method: 8260B Extraction Lot: PWG0800308 <br /> Batch QCMS Batch QCDMS <br /> PWG0800308-1 PWG0800308-2 <br /> Sample Matrix Spike Duplicate Matrix Spike %Rec RPD <br /> Analyte Name Result Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> 1,l,l-Tricllloroethane(TCA) 2.2 15.0 10.0 127 13.6 10.0 113 52-158 10 25 <br /> 1,1-Dichloroethane ND 13.1 10.0 131 12.1 10.0 121 59-145 8 25 <br /> 1,1-Dichloroethene 0.81 14.4 10.0 135 13.2 10.0 123 27-176 9 25 <br /> 1,2-Dichloroethane(EDC) ND 12.3 10.0 123 11.7 10.0 117 56-147 5 25 <br /> 1,2-Dichloropropane ND 12.2 10.0 122 11.4 10.0 114 60-139 7 25 <br /> 1,3,5-Trimethylbenzene ND 11.2 10.0 112 10.7 10.0 107 45-143 4 25 <br /> 1,3-Dichlorobenzene ND 11.2 10.0 112 10.8 10.0 108 62-134 4 25 <br /> Benzene ND 12.3 10.0 123 11.4 10.0 114 58-148 8 25 <br /> Chlorobenzene ND 11.3 10.0 113 10.6 10.0 106 60-136 6 25 <br /> Chloroform ND 12.2 10.0 122 11.4 10.0 114 60-147 7 25 <br /> Ethylbenzene ND 11.5 10.0 115 10.6 10.0 106 50-142 8 25 <br /> Methyl tert-Butyl Ether ND 19.6 20.0 98 19.1 20.0 96 66-136 3 25 <br /> Tetrachloroethene(PCE) 1.1 12.6 10.0 115 11.5 10.0 104 27-168 9 25 <br /> Toluene ND 11.5 10.0 115 10.6 10.0 106 56-137 8 .25 <br /> Trichloroethene(TCE) 2.4 14.1 10.0 117 12.6 10.0 103 42-156 11 25 <br /> Vinyl Chloride ND 15.4 10.0 154 14.2 10.0 142 40-177 8 25 <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. C <br /> Printed: 02/15/2008 08:36:05, Form 3A Organic Page 1 of 1 <br /> P:\Sl'EALTII\CRYSTAL.RPTnForm3DMS.rpt Superset Reference: RR14357 <br />