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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client : Shaw Environmental & Infrastructure, Inc. Service Request: P0700115 <br />Project Name: Foothill Landfill, San Joaquin County Date Collected : 01/31/07 <br />Project Number : 791289 (Ground Water) Date Received.: 02/02/07 <br />Sample Matrix: WATER Date Extracted: NA <br />Date Analyzed : 02/02/07 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />Sample Name: <br />LW -1 <br />Units: <br />mg/L (ppm) <br />Lab Code: <br />P0700115-004MS <br />P0700115-004DMS <br />Basis: <br />NA <br />Test Notes <br />Spike <br />Prep Analysis <br />Spike Level <br />Sample Spike Result Recovery <br />CAS <br />Acceptance <br />Relative <br />Percent Result <br />Analyte <br />Method Method <br />PQL MS DMS <br />Result MS DMS MS DMS <br />Limits <br />Difference Notes <br />Chloride <br />None 300.0 <br />0.5 10.0 10.0 <br />8.56 18.7 18.8 101 102 <br />80-120 <br /><1 <br />Approved By _ Date <br />Report By:RWONG <br />