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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0800887 <br /> Project Name : Foothill Landfill,San Joaquin County Date Collected : NA <br /> Project Number : 124591 (Ground Water) Date Received : NA <br /> Sample Matrix : WATER Date Extracted : NA <br /> Date Analyzed : 04/02/08 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name : Batch QC Units: mg/L(ppm) <br /> Lab Code: P0800877-002MS P0800877-002DMS Basis: NA <br /> Test Notes <br /> Spike <br /> CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery <br /> Acceptance Percent Resuit <br /> Analyte Method Method PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Nitrate as Nitrogen None 300.0 0.12 2.26 2.26 ND 2.28 2.25 101 100 86-110 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Approved By Date: 41 9-5L <br /> Report By:DCastillo <br />