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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: <br />Shaw Environmental & Infrastructure, Inc. <br />Service Request: <br />P0700704 <br />Project Name : <br />Foothill Landfill, San Joaquin <br />County (New Wells) <br />Date Collected: <br />NA <br />Project Number : <br />124591 <br />Date Received : <br />NA <br />Sample Matrix : <br />WATER <br />Date Prepared • <br />NA <br />Date Analyzed: <br />08/02/07 <br />Matrix Spike Summary <br />Inorganic Parameters <br />Sample Name: <br />Batch QC <br />Units: <br />mg/L <br />Lab Code: <br />P0700695-OOIMS <br />Basis: <br />NA <br />Test Notes <br />CAS <br />Percent <br />Spiked <br />Recovery <br />Analysis Spike <br />Sample Sample <br />Percent <br />Acceptance Result <br />Analyte <br />Method MRL Level <br />Result Result Recovery <br />Limits Notes <br />Total Sulfide <br />SM 4500-S2- D 0.05 1.96 <br />ND 1.51 <br />77 <br />75-125 <br />SM Standard Methods for the Examination of Water and Wastewater, 20th Ed., 1998. <br />W <br />Report By: CSKILLERN <br />