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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0802431 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected : NA <br /> Project Number: 124591 (Ground Water) "Date Received: NA <br /> Sample Matrix: WATER Date Extracted NA <br /> Date Analyzed: 07/31/08 <br /> Laboratory Control Sample Summary <br /> Inorganic Parameters <br /> Sample Name: Laboratory Control Sample Basis: NA <br /> Lab Code: P0802431-LCS <br /> Test Notes <br /> CAS <br /> Percent <br /> Recovery <br /> Analysis Percent Acceptance Result <br /> Analyte Units Method True Value Result Recovery Limits Notes <br /> Chloride m L m <br /> g/ (pp ) 300.0 10.0 9.73 97 90-110 <br /> Nitrate as Nitrogen mg/L(ppm) 300.0 2.26 2.13 94 90-110 <br /> Sulfate mg/L(ppm) 300.0 10.0 9.55 96 90-110 <br /> Approved By: Date: CJ <br /> 2 <br /> Report By:SAnderson <br />