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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> CIient: Shaw Environmental&Infrastructure,Inc Service Request: P0700023 <br /> Project: Harney Lane Landfill,San Joaquin County/791290(Ground Water) Date Extracted: 01/18/2007 <br /> Sample Matrix: Water Date Analyzed: 01/18/2007 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name: MW4 Units: ug/L <br /> Lab Code: P0700023-004 Basis: NA <br /> Extraction Method: METHOD Level: Low <br /> Analysis Method: 624M Extraction 'Lot: PWG0700142 <br /> MW4MS MW4DMS <br /> PWG0700142-1 PWG0700142-2 <br /> Sample Matrix Spike Duplicate Matrix Spike <br /> p %Rec RPD <br /> Analyte Name Result Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> 1,1-Dichloroethene ND 22.7 20.0 114 21.6 20.0 108 50-150 5 30 <br /> Benzene ND 20.8 20.0 104 19.8 20.0 99 64-136 5 30 <br /> Chlorobenzene ND 20.3 20.0 102 19.4 20.0 97 66-134 5 30 <br /> Toluene ND 20.3 20.0 102 19.4 20.0 97 74-126 5 30 <br /> Trichloroethene(TCE) ND 21.3 20.0 107 20.1 20.0 100 66-134 6 30 <br /> Results nagged with an asterisk(*)indicate values outside control criteria. <br /> Results nagged with a pound(#)indicate the control criteria Is not applicable. <br /> Percent recoveries and relative percent differences(RPD)are determined by the software usil'2&ftes in the calculation which have not been rounded. <br /> Printed: 01/19/2007 11:28:51 Form 3A-Organic Page 1 of I <br /> ' P:\STEALTH\CRYSTAL.RPT\Fomm3DMS.rpt Superset Reference: RR13316 <br />