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1 COLUMBIA ANALYTICAL SERVICES, INC. <br />IMatrix Spike/Duplicate Matrix Spike Sunmiary <br />Sample Name: MW -2R Units: mg/L (ppm) <br />Lab Code: P0700685-002MS P0700685-002DMS Basis: NA <br />Test Notes : <br />Spike <br />QA/QC Report <br />Prep Analysis Spike Level Sample Spike Result Recovery <br />Client: <br />Shaw Environmental & Infrastructure, Inc. <br />Service Request : <br />P0700685 <br />Limits <br />Project Name : <br />Foothill Landfill, San Joaquin County <br />Date Collected : <br />07/24/07 <br /><1 <br />Project Number : <br />124591 (Ground Water) <br />Date Received : <br />07/25/07 <br />' <br />Sample Matrix : <br />WATER <br />Date Extracted: <br />NA <br />Date Analyzed : <br />07/25/07 <br />IMatrix Spike/Duplicate Matrix Spike Sunmiary <br />Sample Name: MW -2R Units: mg/L (ppm) <br />Lab Code: P0700685-002MS P0700685-002DMS Basis: NA <br />Test Notes : <br />1 <br />1 <br />Approved By ( Date <br />Report By:RWONG <br />Spike <br />Prep Analysis Spike Level Sample Spike Result Recovery <br />CAS <br />Acceptance <br />Relative Result <br />Percent <br />Analyte <br />Result DS <br />Method Method p L MS DMS esuMS DMS MS M <br />Q <br />Limits <br />Difference Notes <br />Nitrate as Nitrogen <br />None 300.0 0.2 2.26 2.26 2.46 4.62 4.64 96 96 <br />80-120 <br /><1 <br />1 <br />1 <br />Approved By ( Date <br />Report By:RWONG <br />