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Approved By: 5 Date <br />17'Z-16) <br />Report By:RWONG <br />COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QCReport <br />p ort <br />—" <br />Client: <br />Shaw Environmental & Infrastructure, Inc. <br />Service Request : <br />P0700115 <br />Project Name: <br />Foothill Landfill, San Joaquin County <br />Date Collected : <br />NA <br />Project Number: <br />791289 (Ground Water) <br />Date Received : <br />NA <br />Sample Matrix : <br />WATER <br />Date Extracted : <br />NA <br />Date Analyzed: <br />02/02/07 <br />Laboratory Control Sample Summary <br />Inorganic Parameters <br />Sample Name: <br />Laboratory Control Sample <br />Basis : <br />NA <br />Lab Code: <br />P0700115-LCS <br />Test Notes <br />CAS <br />Percent <br />Recovery <br />Analysis <br />Percent <br />Acceptance <br />Result <br />Analyte <br />Units Method <br />True Value Result Recovery <br />Limits <br />Notes <br />Chloride <br />mg/L (ppm) 300.0 <br />5.00 4.84 <br />97 <br />90-110 <br />Nitrate as Nitrogen <br />mg/L (ppm) 300.0 <br />1.13 1.13 <br />100 <br />90-110 <br />Sulfate <br />mg/L (ppm) 300.0 <br />5.00 5.10 <br />102 <br />90-110 <br />Approved By: 5 Date <br />17'Z-16) <br />Report By:RWONG <br />