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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client : Shaw Environmental&Infrastructure,Inc. Service Request: L0600154 <br /> Project Name: North County Landfill,San Joaquin County Date Collected : NA <br /> Project Number: 791288(Ground Water) Date Received : NA <br /> Sample Matrix : WATER Date Extracted : NA <br /> Date Analyzed : 01/27-31/06 <br /> Laboratory Control Sample Summary <br /> Inorganic Parameters <br /> Sample Name: Laboratory Control Sample Basis : NA <br /> Lab Code: L0600154-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 /> Alkalinity as CaCO3,Total mg/L(ppm) SM 2320B 86.1 92.6 108 85-115 <br /> Chloride mg/L(ppm) 300.0 10.0 10.1 101 92-109 <br /> Nitrate as Nitrogen mg/L(ppm) 300.0 2.26 2.16 96 92-108 <br /> Solids,Total Dissolved(TDS) mg/L(ppm) 160.1 100 101 101 76-119 <br /> Sulfate mg/L(ppm) 300.0 20.0 19.7 99 94-109 <br /> i <br /> f <br /> 1 <br /> 1 <br /> 1 <br /> t <br /> Approved By: Date : 3 <br />