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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client : Shaw Environmental&Infrastructure,Inc. Service Request: P0800887 <br /> Project Name : Foothill Landfill,San Joaquin County Date Collected: NA <br /> Project Number: I24591 (Ground Water) Date Received: NA <br /> Sample Matrix: WATER Date Extracted: NA <br /> Date Analyzed: 04/02/08 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: Batch QC Units: mg/L(ppm) <br /> Lab Code: P0800877-002MS P0800877-002DMS 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 /> Chloride None 300.0 50 1000 1000 511 1510 1530 100 102 91-115 1 <br /> l <br /> 9 f <br /> Approved By 1 1 — Date: A <br /> �F <br /> Report By:DCastillo <br />