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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 /> Matrix 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 /> Nitrate as Nitrogen None 300.0 0.20 2.26 2.26 1.70 3.96 3.98 100 101 83-120 <1 <br /> 1 <br /> ? /� c 23 <br /> Approved By d r� Date <br /> Report By:DCastillo <br />