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a <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> Client: Shaw Environment&Infiastructure,Inc. Service Request No.: L0600776 <br /> Project: North County Landfill/791288(Ground Water) Date Received: 5/18/06 <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 H 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 Receiat <br /> The samples were received for analysis at Columbia Analytical Services on 5/18/06. 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 /> Volatile Organic Compounds by EPA Method 8260B <br /> Batch QC was run along with these samples. These results have beenrovided for informational nal purposes only. The <br /> Method Blank LWG0601101-4 contained low levels of Acetone above the Method Detection Limit(MDL). This <br /> result is flagged with"H"because it is due to laboratory contamination. The analyte in question was not detected in <br /> the associated field samples. The sample data is not significantly affected. No further corrective action was <br /> appropriate. <br /> Approved by ��---- Date ;"IV� <br />