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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0900139 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected: 01/14/09 <br /> Project Number: 124591 (Ground Water) Date Received : 01/15/09 <br /> Sample Matrix : WATER Date Extracted: NA <br /> Date Analyzed: 01/15/09 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: MW-2R Units: mg/L(ppm) <br /> Lab Code: P0900139-OOlMS P0900139-OOIDMS 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 /> Nitrate as Nitrogen None 300.0 0.12 2.26 2.26 2.56 4.89 4.87 103 102 86-110 <1 <br /> r" <br /> Approved ByyjZ� ii�/1 . v Date <br /> Report By:NFallahi <br />