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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0700376 <br /> Project: Corral Hollow Landfill,San Joaquin County/124592(Ground Water) Date Extracted: 04/19/2007 <br /> Sample Matrix: Water Date Analyzed: 04/19/2007 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: SB-1 Units: ug/L <br /> Lab Code: P0700376-003 Basis: NA <br /> Extraction Method: EPA 5030B Level: Low <br /> Analysis Method: 8260B Extraction Lot: PWG0700595 <br /> SB-1MS SB-IDMS <br /> PWG0700595-1 PWG0700595-2 <br /> Sample Matrix Spike Duplicate Matrix Spike %Rec RPD <br /> Analyte Name Result Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> 1,1,1-Trichloroethane(TCA) ND 11.4 10.0 114 10.9 10.0 109 52-158 4 25 <br /> 1,1-Dichloroethane ND 10.3 10.0 103 9.97 10.0 100 59-145 3 25 <br /> 1,1-Dichloroethene ND 11.9 10.0 119 11.2 10.0 112 27-176 6 25 <br /> 1,2-Dichloroethane(EDC) ND 9.93 10.0 99 9.92 10.0 99 56-147 0 25 <br /> 1,2-Dichloropropane ND 9.70 10.0 97 9.64 10.0 96 60-139 1 25 <br /> 1,3,5-Trimethylbenzene ND 9.42 10.0 94 8.09 10.0 81 45-143 15 25 <br /> 1,3-Dichlorobenzene ND 9.92 10.0 99 9.73 10.0 97 62-134 2 25 <br /> Benzene ND 10.2 10.0 102 9.92 10.0 99 58-148 3 25 <br /> Chlorobenzene ND 9.99 10.0 100 9.86 10.0 99 60-136 1 25 <br /> Chloroform ND 10.4 10.0 104 10.2 10.0 102 60-147 2 <br /> Ethylbenzene ND 10.1 10.0 101 9.87 10.0 99 50-142 2 <br /> Methyl tert-Butyl Ether ND 19.1 20.0 96 19.5 20.0 97 66-136 2 25 <br /> Tetrachloroethene(PCE) ND 11.0 10.0 110 10.7 10.0 107 27168 3 25 <br /> Toluene ND 9.58 10.0 96 9.23 10.0 92 56-137 4 25 <br /> Trichloroethene(TCE) ND 10.6 10.0 106 10.2 10.0 102 42-156 4 25 <br /> Vinyl Chloride ND 13.1 10.0 131 12.1 10.0 121 40-177 7 25 <br /> j <br /> 1 <br /> 1 <br /> 1 <br /> i <br /> Re suits 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 /> 33 <br /> Printed: 04/25/2007 10:50:45 Form 3A-Organic Page 1 of 1 , <br /> P:\STEALTH\CRYSTAL.RP1NFonn3DMS.rpt Superset Reference: RR13545 <br />