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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client : Shaw Environmental&Infrastructure,Inc. Service Request: P0800213 <br /> Project Name: Foothill Landfill,San Joaquin County Date Collected : 02/06%08 <br /> Project Number : 124591 (Ground Water) Date Received : 02/07/08 <br /> Sample Matrix : WATER Date Extracted : NA <br /> Date Analyzed : 02/07/08 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name: MW-2R Units: mg/L(ppm) <br /> Lab Code: P0800213-OOIMS P0800213-OOIDMS 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 2.64 4.86 4.84 98 97 83-120 <1 <br /> 1 a <br /> Approved By � � Date: C I 1 <br /> Report By:DCastillo <br />