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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc. Service Request: P0700116 <br />roject 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 />1 Date Analyzed: 02/02/07 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />tample Name: Batch QC Units: mg/L (ppm) <br />b Code: P0700115-004MS P0700115-004DMS Basis : NA <br />Test Notes <br />Spike <br />CAS RelativePrep Analysis Spike Level Sample Spike Result Recovery <br />Acceptance Percent Result <br />Inalyte Method Method PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br />Chloride None 300.0 0.5 10.0 10.0 8.56 18.7 18.8 101 102 80-120 <1 <br />1 <br />proved By Date <br />ort By:RWONG <br />