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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0900161 <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: 01/16/09 <br /> Laboratory Control Sample Summary <br /> Inorganic Parameters <br /> Sample Name: Laboratory Control Sample Basis: NA <br /> Lab Code: P0900161-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 mg/L(ppm) 300.0 10.0 10.3 103 90-107 <br /> Nitrate as Nitrogen mg/L(ppm) 300.0 2.26 2.25 100 90-110 <br /> Sulfate mg/L(ppm) 300.0 10.0 10.2 102 90-110 <br /> r <br /> Approved By: Date: 11g110 7 <br /> Report l3y:NFallahi <br />