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x;s <br /> Afsolumbia <br /> 2655 Park Center Drive, Suite A Simi Valley, California 93065 (805) 526-7161 (805)526-7270 fax AnalyticalServices'"C <br /> An Employee,-Owned Company <br /> Client: Shaw Environmental&Infrastructure, Inc. CAS Project No: P0800887 <br /> Project: Foothill Landfill, San Joaquin County/ 124591 (Ground Water) <br /> CASE NARRATIVE <br /> The samples were received intact under chain of custody on April 2, 2008 and were stored in accordance <br /> with the analytical method requirements. Please refer to the sample acceptance check form for additional <br /> information. The results reported herein are applicable only to the condition of the samples at the time of <br /> sample receipt. <br /> Volatile Organic Compounds by EPA Method 8260 <br /> Batch QC (Matrix Spike) was analyzed with the sample(s) and has been provided for informational <br /> purposes only. The upper control criterion was exceeded for sec-Butylbenzene and Vinyl Acetate in the <br /> Laboratory Control Sample (LCS) identified as PWG0800501-3. The analyte(s) in question were not <br /> detected in the associated field samples. Since the error associated with the elevated recovery equates to a <br /> high bias, the sample data has not been significantly affected. The data has been flagged accordingly. No <br /> corrective action was required. <br /> Anions by EPA Method 300.0 <br /> Batch QC was analyzed with this sample and has been provided for informational purposes only. The <br /> required control criteria were acceptable for the associated Method Blank and Laboratory Control <br /> Sample. No anomalies were encountered during these analyses. <br /> The results of analyses are given in the attached laboratory report. All results are intended to be <br /> considered in their entirety, and Columbia Analytical Services, Inc. (CAS) is not responsible for <br /> utilization of less than the complete report. <br /> 2 <br /> NELAP Accredited ACIL Seal of Excellence Award ,,om,Req 1.1 <br />