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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc. Service Request: P0700116 <br />Project Name : Foothill Landfill, San Joaquin County Date Collected: NA <br />Project Number: 791289 (Leachate Module) Date Received: NA <br />Sample Matrix: WATER Date Extracted: NA <br />Sample Name <br />Lab Code: <br />Test Notes <br />Analyte <br />Nitrate as Nitrogen <br />Batch QC <br />P0700115-004MS <br />Prep <br />Method <br />None <br />Analysis <br />Method <br />300.0 <br />Approved By 20 Date: <br />Report By: RWONG <br />Date Analyzed: <br />02/02/07 <br />Matrix Spike/Duplicate <br />Matrix Spike Summary <br />Units: <br />mg/L (ppm) <br />P0700115-004DMS <br />Basis: <br />NA <br />Spike <br />Spike Level <br />Sample Spike Result <br />Recovery <br />CAS <br />Acceptance <br />Relative <br />Percent <br />Result <br />PQL MS DMS <br />Result MS DMS <br />MS DMS <br />Limits <br />Difference <br />Notes <br />n ? 7 ?6 ? ?(i <br />1 ?n 114 116 <br />(A 96 <br />M I N) <br /><1 <br />Approved By 20 Date: <br />Report By: RWONG <br />