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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0800887 <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 : 04/02/08 <br /> Laboratory Control Sample Summary <br /> Inorganic Parameters <br /> Sample Name: Laboratory Control Sample Basis: NA <br /> Lab Code: P0800887-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 5.00 4.76 95 90-107 <br /> Nitrate as Nitrogen mg/L(ppm) 300.0 1.13 1.10 97 90-110 <br /> Sulfate mg/L(ppm) 300.0 5.00 4.91 98 90-110 <br /> t <br /> Approved By: YL Date <br /> Date <br /> 23 <br /> Report By:DCastillo <br />