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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Sample Name: Lab Control Sample <br />p �p <br />Lab Code: P0700704-LCS <br />Test Notes <br />Prep Analysis <br />Analyte Method Method <br />Total Sulfide NONE SM 4500-52- D <br />Units: mg/L <br />Basis : NA <br />CAS <br />Percent <br />Recovery <br />Percent Acceptance Result <br />True Value Result Recovery Limits Notes <br />1.96 1.91 97 85-115 <br />SM Standard Methods for the Examination of Water and Wastewater, 20th Ed., 1998. <br />1 <br />I <br />7 <br />Report By:CSKILLERN <br />Client : <br />Shaw Environmental & Infrastructure, Inc. Service Request: <br />P0700704 <br />Project Name : <br />Foothill Landfill, San Joaquin County (New Wells) Date Collected : <br />NA <br />Project Number : <br />124591 Date Received : <br />NA <br />Sample Matrix: <br />WATER Date .Prepared : <br />NA <br />Date Analyzed : <br />08/02/07 <br />Laboratory Control Sample Summary <br />Inorganic Parameters <br />Sample Name: Lab Control Sample <br />p �p <br />Lab Code: P0700704-LCS <br />Test Notes <br />Prep Analysis <br />Analyte Method Method <br />Total Sulfide NONE SM 4500-52- D <br />Units: mg/L <br />Basis : NA <br />CAS <br />Percent <br />Recovery <br />Percent Acceptance Result <br />True Value Result Recovery Limits Notes <br />1.96 1.91 97 85-115 <br />SM Standard Methods for the Examination of Water and Wastewater, 20th Ed., 1998. <br />1 <br />I <br />7 <br />Report By:CSKILLERN <br />