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COLUMBU ANALYTICAL SERVICES,INC. <br /> Client: Shaw Environment&Infrastructure,Inc. Service Request No.: P0700322 <br /> Project: Harney Lane LF,San Joaquin County/124593 Date Received: 4/3/07 <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 4/3/07. 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 /> Volatile Organic Compounds by EPA Method 624M <br /> The upper control criterion was exceeded for Bromoform in Laboratory Control Sample(LCS)PWG0700543. The <br /> analyte in question was not detected in the associated field samples. The error associated with the elevated recovery <br /> equates to a high bias. The sample data has not been significantly affected. The data has been flagged accordingly. <br /> Chloride by EPA Method 300.0 <br /> No anomalies were encountered during this analysis. <br /> Approved by Date `1 dal D <br />