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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0700376 <br /> roject: Corral Hollow Landfill,San Joaquin County/124592(Ground Water) Date Extracted: 04/20/2007 <br /> Ell"le Matrix: Water Date Analyzed: 04/20/2007 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> ample Name: Batch QC Units: ug/L <br /> ab Code: P0700378-002 Basis: NA <br /> Extraction Method: EPA 5030B Level: Low <br /> clysis Method: 8260B Extraction Lot: PWG0700642 <br /> Batch QCMS Batch QCDMS <br /> PWG0700642-1 PWG0700642-2 <br /> Sample Matrix Spike Duplicate Matrix Spike %Rec RPD <br /> Itnalyte Name Result Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> ,1,1-Trichloroethane(TCA) ND 11.9 10.0 119 10.3 10.0 103 52-158 14 25 <br /> 1,1-Dichloroethane 0.59 10.8 10.0 102 10.3 10.0 97 59-145 4 25 <br /> 1 <br /> 1-Dichloroethene ND 12.6 10.0 126 10.7 10.0 107 27-176 16 25 <br /> ,2-Dichloroethane(EDC) 0.95 10.8 10.0 99 13.0 10.0 121 56-147 18 25 <br /> 1,2-Dichloropropane 0.70 10.2 10.0 95 10.7 10.0 100 60-139 5 25 <br /> ,3,5-Trimethylbenzene ND 9.89 10.0 99 9.55 10.0 96 45-143 3 25 <br /> ,3-Dichlorobenzene ND 10.2 10.0 102 11.1 10.0 111 62-134 8 25 <br /> enzene ND 10.8 10.0 108 10.4 10.0 104 58-148 4 25 <br /> Cwgrobenzene 1.4 11.6 10.0 103 11.8 10.0 105 60-136 2 25 <br /> form ND 10.8 10.0 108 10.9 10.0 109 60-147 1 25 <br /> benzene ND 10.5 10.0 105 9.81 10.0 98 50-142 6 25 <br /> Methyl tert-Butyl Ether ND 19.7 20.0 98 24.9 20.0 125 66-136 23 25 <br /> etrachloroethene(PCE) 8.2 20.3 10.0 121 18.3 10.0 101 27-168 10 25 <br /> oluene ND 9.92 10.0 99 9.39 10.0 94 56-137 5 25 <br /> Trichloroethene(TCE) 2.8 14.0 10.0 112 12.8 10.0 100 42-156 9 25 <br /> inyl Chloride 1.2 13.0 10.0 118 10.2 10.0 90 40-177 24 25 <br /> flagged with an asterisk(*)indicate values outside control criteria. <br /> esults bagged with a pound(t0 indicate the control criteria is riot applicable. <br /> ercent recoveries and relative percent differences(RPD)are determined by the software using values in the calculation which have not been rounded. <br /> 34 <br /> 1rinted: 04/25/2007 10:50:48 Form 3A-Organic Page 1 of 1 <br /> ,:\STEALTH\CRYSTAL.RPT\Fonn3DMS.tpt SuperSet Reference: RR13545 <br />