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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0802431 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected : 07/30/08 <br /> Project Number : 124591 (Ground Water) Date Received : 07/31/08 <br /> Sample Matrix: WATER Date Extracted : NA <br /> Date Analyzed : 07/31/08 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: MW-4 Units: mg/L(ppm) <br /> Lab Code: P0802431-002MS P0802431-002DMS Basis: NA <br /> Test Notes <br /> Spike CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery Result <br /> Analyte Method Method PQL MS DMS Result MS DMS MS DMS Acceptance Percent Notes <br /> Limits Difference <br /> Sulfate None 300.0 0.50 10.0 10.0 9.60 19.9 20.1 103 105 83-116 1 <br /> Approved By Date: O� <br /> 33 5 <br /> Report By:SAnderson <br />