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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0800191 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected : 02/05/08 <br /> Project Number: 124591 (Ground Water) Date Received: 02/06/08 <br /> Sample Matrix: WATER Date Extracted : NA <br /> Date Analyzed : 02/06/08 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: MW-4 Units: mg/L(ppm) <br /> Lab Code: P0800191-002MS P0800191-002DMS Basis: NA <br /> Test Notes <br /> Spike <br /> Prep Analysis Spike Level Sample Spike Result Recovery CAS Relative 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 9.88 19.9 19.9 100 100 83-116 <1 <br /> 1 <br /> Approved By � Date: �) 30 <br /> Report By:DCastillo <br />