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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0800193 <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 : 02/06/08 <br /> rMatrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: Batch QC Units: mg/L(ppm) <br /> Lab Code: P0800191-002MS P0800191-002DMS Basis: NA <br /> Test.Notes <br /> Spike <br /> CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery <br /> Acceptance Percent Result <br /> Analyte Method Method PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Sulfate None 300.0 0.50 10.0 10.0 9.88 19.9 19.9 100 100 90-110 <1 <br /> r <br /> 1 <br /> r <br /> r <br /> r <br /> r <br /> r <br /> r <br /> r <br /> G.�/( /% J Gig <br /> Approved By �;, ` (1�. i' = tel- �� Date <br /> r <br /> Report By:DCastillo <br /> r <br />