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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client : Shaw Environmental & Infrastructure, Inc. Service Request: P0700116 <br />Project Name : Foothill Landfill, San Joaquin County Date Collected : NA <br />Project Number: 791289 (Leachate Module) Date Received : NA <br />Sample Matrix : WATER Date Extracted : NA <br />Date Analyzed : 02/02/07 <br />Laboratory Control Sample Summary <br />Inorganic Parameters <br />Sample Name: Laboratory Control Sample <br />Basis: NA <br />Lab Code: P0700116-LCS <br />Test Notes <br />CAS <br />Percent <br />Recovery <br />Analysis <br />Percent <br />Acceptance Result <br />Analyte <br />Units <br />Method <br />True Value <br />Result <br />Recovery <br />Limits Notes <br />Chloride <br />mg/L (ppm) <br />300.0 <br />5.00 <br />4.84 <br />97 <br />90-110 <br />Nitrate as Nitrogen <br />mg/L (ppm) <br />300.0 <br />1.13 <br />1.13 <br />100 <br />90-110 <br />Sulfate <br />mg/L (ppm) <br />300.0 <br />5.00 <br />5.10 <br />102 <br />90-110 <br />Approved By: Date <br />Report By:RWONG <br />