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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client : Shaw Environmental & Infrastructure, Inc. Service Request: P0700116 <br />Iroject Name : Foothill Landfill, San Joaquin County Date Collected: NA <br />roject Number : 791289 (Leachate Module) Date Received: NA <br />Sample Matrix: WATER Date Extracted: NA <br />Date Analyzed : 02/02/07 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />ample Name <br />Lab Code: <br />Lest Notes <br />Inalyte <br />Sulfate <br />r-, <br />J <br />!J <br />i <br />7 <br />i <br />J <br />Batch QC <br />P0700115-004MS P0700115-004DMS <br />Units: mg/L (ppm) <br />Basis: NA <br />Spike <br />Sample CAS Relative Analysis S ikeLevel S ikeResult Recovery <br />Acceptance Percent Result <br />Method Method PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br />None 300.0 0.5 10.0 10.0 13.4 23.6 23.5 102 101 80-120 <1 <br />Opproved B Date <br />Y <br />port By:RWONG <br />