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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0700322 <br /> Project: Harney Lane Landfill,San Joaquin County/124593(Ground Water) Date Extracted: 04/05/2007 <br /> Sample Matrix: Water Date Analyzed: 04/05/2007 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: MW-1 Units: ug/L <br /> Lab Code: P0700322-001 Basis: NA <br /> Extraction Method: METHOD Level: Low <br /> Analysis Method: 624M Extraction Lot: PWG0700543 <br /> MW-1MS MW-IDMS <br /> PWG0700543-1 PWG0700543-2 <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-Dichloroethene ND 21.2 20.0. 106 2 2.1 20.0 110 50-150 4 30 <br /> Benzene ND 20.9 20.0 104 20.4 20.0 102 64-136 2 30 <br /> Chlorobenzene ND 21.4 20.0 107 21.0 20.0 105 66-134 2 30 <br /> Toluene ND 23.4 20.0 117 22.4 20.0 112 74-126 4 30 <br /> Trichloroethene(TCE) ND 21.9 20.0 110 21.5 20.0 107 66-134 2 30 <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 usin s in the calculation which have not been rounded. <br /> Printed: 04/09/2007 13:59:35 Form 3A-Organic Page 1 of 1 <br /> P:\STEALTMCRYSTAL.RPT1Form3DMS.rpt SuperSetReference: RR13511 <br /> 1 <br />