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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0802431 <br /> Project: Foothill Landfill,San Joaquin County/124591 (Ground Water) Date Extracted: 08/06/2008 <br /> Sample Matrix: Water Date Analyzed: 08/06/2008 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: Batch QC Units: ug/L <br /> Lab Code: P0802444-001 Basis: NA <br /> Extraction Method: EPA 5030B Level: Low <br /> Analysis Method: 8260B Extraction Lot: PWG0801029 <br /> Batch QCMS Batch QCDMS <br /> PWG0801029-1 PWG0801029-2 <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 11.3 10.0 113 11.0 10.0 110 58-163 3 25 <br /> IJ-Dichloioethane ND 10.6 10.0 106 10.2 10.0 102 57-158 4 25 <br /> 1,1-Dichloroethene ND 11.6 10.0 116 10.7 10.0 107 40-176 8 25 <br /> 1,2-Dichloroethane(EDC) ND 10.1 10.0 101 9.98 10.0 100 60-161 1 25 <br /> 1,2-Dichloropropane ND 10.9 10.0 109 10.6 10.0 106 58-156 2 25 <br /> 1,3,5-Trimethylbenzene ND 11.8 10.0 118 10.5 10.0 105 49-153 12 25 <br /> 1,3-Dichlorobenzene ND 11.4 10.0 114 10.9 10.0 109 66-143 5 25 <br /> Benzene ND 11.0 10.0 110 10.6 10.0 106 61-154 3 25 <br /> Chlorobenzene ND 11.1 10.0 111 10.7 10.0 107 65-143 3 25 <br /> Chloroform ND 11.1 10.0 111 11.0 10.0 110 60-153 1 25 <br /> Ethylbenzene ND 11.3 10.0 113 10.8 10.0 108 64-150 4 25 <br /> Methyl tert-Butyl Ether ND 18.6 20.0 93 18.4 20.0 92 60-147 1 25 <br /> Tetrachloroethene(PCE) ND 11.4 10.0 114 10.8 10.0 108 60-147 6 25 <br /> Toluene ND 11.2 10.0 112 10.5 10.0 105 62-149 7 25 <br /> Trichloroethene(TCE) ND 11.3 10.0 113 10.6 10.0 106 59-147 7 25 <br /> Vinyl Chloride ND 14.1 10.0 141 13.7 10.0 137 49-189 3 25 <br /> Results flagged with an asterisk(r)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 /> 2 <br /> Analyst:KMiller Form 3A-Organic Page 1 of 1 <br /> Printed: 08/13/2008 16:41:04 <br /> P:\STEALTH\CRYSTAL.RPT\Form3DMS.rpt SuperSet Reference: RR14904 <br />