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COLUMBIA ANALYTICAL SERVICES, <br />INC. <br />QA/QC Report <br />Client : <br />Shaw Environmental & Infrastructure, Inc. <br />Service Request : <br />P0700116 <br />Project Name : <br />Foothill Landfill, San Joaquin County <br />Date Collected: <br />NA <br />Project Number : <br />Sample Matrix : <br />791289 (Leachate Module) <br />WATER <br />Date Received : <br />Date Extracted : <br />NA <br />NA <br />Date Analyzed : <br />02/02/07 <br />1 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />Sample Name: <br />Batch QC <br />Units: <br />mg/L (ppm) <br />Lab Code: <br />P0700115-004MS P0700115-004DMS <br />Basis: <br />NA <br />Test Notes <br />Spike <br />CAS Relative <br />Pre Anal sis S ike Level Sam le <br />S ike Result RecoverY <br />Result <br />Analyte <br />Method Method PQL MS DMS Result <br />MS DMS MS DMS <br />Acceptance Percent <br />Limits Difference Notes <br />Chloride <br />None 300.0 0.5 10.0 10.0 8.56 <br />18.7 18.8 101 102 <br />80-120 <1 <br />i <br />1 <br />i <br />t <br />t <br />t <br />1 <br />1 <br />Approved By <br />Date: <br />Report By:RWONG <br />