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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc. Service Request: L0600154 <br /> Project Name : North County Landfill, San Joaquin County Date Collected : 01/26/06 <br /> Project Number: 791288 (Ground Water) Date Received : 01/27/06 <br /> Sample Matrix: WATER Date Extracted : NA <br /> Date Analyzed : 01/27/06 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Sample Name : G-3D Units: mg/L(ppm) <br /> Lab Code : L0600154-002MS L0600154-002DMS Basis : NA <br /> Test Notes <br /> Spike <br /> Prep Analysis Spike Level Sample Spike Result Recovery CAS Relative <br /> Acceptance Percent. Result <br /> Analyte Method Method <br /> PQL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Nitrate as Nitrogen METHOD 300.0 0.2 2.26 2.26 1.32 3.51 3.52 97 97 85-111 <1 <br /> 1 <br /> Approved By Date: <br /> 1 4=- 7 <br /> Report AwNKunermnn <br />