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COLUMBIA ANALYTICAL SERVICES, INC. <br />Client: Shaw Environment & Infrastructure, Inc. Service Request No.: P0700346 <br />Project: Foothill Landfill/124591 (Resample) Date Received: 4/6/07 <br />Sample Matrix: Water <br />CASE NARRATIVE <br />All analyses were performed consistent with the quality assurance program of Columbia Analytical Services, Inc. (CAS). <br />This report contains analytical results for samples designated for Tier II data deliverables. When appropriate to the <br />method, method blank results have been reported with each analytical test. Surrogate recoveries have been reported for <br />all applicable organic analyses. Additional quality control analyses reported herein include: Matrix/Duplicate Matrix <br />Spike (MS/DMS) and Laboratory/Duplicate Laboratory Control Sample (LCS/DLCS). <br />Sample Receipt <br />The samples were received for analysis at Columbia Analytical Services on 4/6/07. No discrepancies were noted upon <br />initial sample inspection. The samples were received in good condition and consistent with the accompanying chain of <br />custody form. The samples were stored at 4°C upon receipt at the laboratory. <br />Acetone by EPA Method 8260B <br />Batch QC was run along with these samples. These results have been provided for informational purposes only. The <br />Method Blank and Laboratory Control Samples were within control criteria. No anomalies were encountered during <br />this analysis. <br />Approved by 4 I ;1; LI �.l '1� <br />