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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0900162 <br /> Project Name: Foothill Landfill, San Joaquin County Date Collected NA <br /> Project Number: 124591 (Leachate Module) Date Received : NA <br /> Sample Matrix: WATER Date Extracted : NA <br /> Date Analyzed: 01/16/09 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: Batch QC Units : mg/L(ppm) <br /> Lab Code: P0900161-00IMS P0900161-00IDMS Basis : NA <br /> Test Notes <br /> Spike CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery Result <br /> Method Method p L MS DMS Result MS DMS MS DMS Acceptance Percent <br /> Analyte Q Limits Difference Notes <br /> Sulfate None 300.0 0.50 10.0 10.0 6.51 16.5 16A 100 99 83-116 <1 <br /> Approved By �.J �' Date: t/� 3 <br /> Report By:NFallahi <br />