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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0802444 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected: 07/31/08 <br /> Project Number: 124591 (Ground Water) Date Received: 08/01/08 <br /> Sample Matrix: WATER Date Extracted: NA <br /> Date Analyzed: 08/01/08 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: MW-1 Units: mg/L(ppm) <br /> Lab Code: P0802444-OOIMS P0802444-OOIDMS Basis: NA <br /> Test Notes <br /> Spike CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery Result <br /> Analyte Method Method p L MS DMS Result MS DMS MS DMS Acceptance Percent Notes <br /> y Q Limits Difference <br /> Sulfate None 300.0 0.50 10.0 10.0 4.91 15.3 15.4 104 105 83-116 <1 <br /> i <br /> Approved By Date3-3 <br /> Report By:NFallahi <br />