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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc. Service Request : L0600992 <br />Project Name : Foothill Landfill Date Collected : NA <br />Project Number : 791289 (Ground Water) Date Received : NA <br />Sample Matrix: WATER Date Extracted • NA <br />Date Analyzed : 07/28/06 <br />Laboratory Control. Sample Summary <br />Inorganic Parameters <br />Sample Name : Laboratory Control Sample Basis : NA <br />Lab Code : L0600992-LCS <br />Test Notes <br />CAS <br />Percent <br />Recovery <br />Analysis Percent Acceptance Result <br />Analyte Units Method True Value Result Recovery Limits Notes <br />Chloride mg/L (ppm) 300.0 5.00 4.73 95 90-110 <br />Nitrate as Nitrogen mg/L (ppm) 300.0 1.13 1.10 97 90-110 <br />Sulfate mg/L (ppm) 300.0 5.00 4.85 97 90-110 <br />Approved By: AZDate <br />Report By:SAnderson <br />