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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report 1 <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: P0700376 <br /> Project Name: Corral Hollow Landfill,San Joaquin County Date Collected: 04/16/07 <br /> Project Number: 124592(Ground Water) Date Received: 04/17/07 <br /> Sample Matrix: WATER Date Extracted: NA <br /> Date Analyzed : 04/17/07 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name : MW-4 Units: mg/L(ppm) <br /> Lab Code: P0700376-OOIMS P0700376-OOIDMS Basis : NA <br /> Test Notes <br /> 1 <br /> Spike CAS Relative <br /> Prep Analysis Spike Level Sample Spike Result Recovery 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 2 11.3 11.3 9.35 21.6 21.1 108 104 80-120 2 <br /> r <br /> 1 <br /> . 1 <br /> 1 <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> Approved By Date <br /> Report By:RWONG <br />