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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0802842 <br /> Project: Foothill Landfill,San Joaquin County/124591 (Resample) Date Extracted: 09/08/2008 <br /> Sample Matrix: Water Date Analyzed: 09/08/2008 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: Batch QC Units: ug/L <br /> Lab Code: P0802913-001 Basis: NA <br /> Extraction Method: EPA 5030B Level: Low <br /> Analysis Method: 8260B Extraction Lot: PWG0801105 <br /> Batch QCMS Batch QCDMS <br /> PWG0801105-1 PWG0801105-2 <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 12.5 10.0 125 12.5 10.0 125 40-176 0 25 <br /> Acetone ND 40.8 50.0 82 42.7 50.0 85 44-166 5 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. <br /> Analyst:KMiller Form 3A-Organic Page 1 of 1 <br /> Printed: 09/11/2008 12:09:38 <br /> P:\STEALTH\CRYSTAL.RPrEorm3DMS.rpt SuperSetReference: RR14944 <br />