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'J <br />1� I <br />Ll <br />COLUMBIA ANALYTICAL SERVICES, INC. <br />Date: <br />Report By:RWONG <br />QA/QC Report <br />Client : <br />Shaw Environmental & Infrastructure, Inc. <br />Service Request : <br />P0700115 <br />Project Name: <br />Foothill Landfill, San Joaquin County <br />Date Collected : <br />0 1/3 1/07 <br />Project Number: <br />791289 (Ground Water) <br />Date Received : <br />02/02/07 <br />Sample Matrix : <br />WATER <br />Date Extracted : <br />NA <br />Date Analyzed : <br />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 />Test Notes <br />P070011I-004MS P0710111-004DMS <br />Basis: <br />NA <br />Spike <br />Prep Analysis Spike Level Sample <br />Spike Result Recovery <br />CAS <br />Relative <br />Result <br />Analyte <br />Method Method PQL MS DMS Result <br />MS DMS MS DMS <br />Acceptance <br />Limits <br />Percent Notes <br />Difference <br />Nitrate as Nitrogen <br />None 300.0 0.2 2.26 2.26 1.20 <br />3.34 3.36 95 96 <br />80-120 <br /><1 <br />'J <br />1� I <br />Ll <br />Approved By <br />Date: <br />Report By:RWONG <br />