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COLUMBIA. ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc. Service Request : L0600992 <br />Project Name : Foothill Landfill Date Collected : 07/27/06 <br />Project Number : 791289 (Ground Water) Date Received : 07/28/06 <br />Sample Matrix : WATER Date Extracted: NA <br />Date Analyzed : 07/28/06 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />arY <br />Sample Name: MW -2R Units: mg/L (ppm) <br />Lab Code : L0600992-002MS L0600992-002DMS Basis: NA <br />Test Notes <br />Spike <br />Spike Level Sample Spike Result Recovery CAS Relative <br />Prep Analysis S <br />p p p � 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 0.3 2.26 2.26 2.21 4.50 4.48 101 100 80-120 <1 <br />1 <br />1 <br />Approved By <br />Date <br />Report By:SAnderson <br />