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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 />Sample Name: MW -2R Units: mg/L (ppm) <br />Lab Code: L0600992-002MS L0600992-002DMS Basis: NA <br />Test Notes <br />Spike CAS Relative <br />Prep Analysis Spike Level Sample Spike Result Recovery Result <br />Analyte Method Method P L MS IDMS Resalt Acceptance Percent <br />Q MS PMS MS DMS Limits Difference Notes <br />Chloride None 300.0 1 10.0 10.0 5.39 15.8 15.9 104 105 80-120 <1 <br />Approved By 711--31 14�16 <br />Date <br />Report By:SAnderson <br />