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d0fColumbia <br /> Analytical <br /> 2655 Park Center Drive, Suite A Simi Valley,California 93065 (805)526-7161 (805)526-7270 fax Services""` <br /> An Employee-Owned Company <br /> Client: Shaw Environmental&Infrastructure,Inc. CAS Project No: P0802444 <br /> Project: Foothill Landfill, San Joaquin County/ 124591 (Ground Water) <br /> CASE NARRATIVE <br /> The samples were received intact under chain of custody on August 1, 2.008 and were stored in <br /> accordance with the analytical method requirements. Please refer to the sample acceptance check form <br /> for additional information. The results reported herein are applicable only to the condition of the samples <br /> at the time of sample receipt. <br /> Volatile Organic Compounds by EPA Method 8260B <br /> The spike recovery for Vinyl Acetate in the Laboratory Control Sample (LCS) identified as <br /> PWG0801029-3 was outside the lower control criterion. The error associated with reduced recovery <br /> equates to a potential low bias. The analyte in question was not detected in the associated field sample(s); <br /> however, a Method Reporting Limit (MRL) check standard containing the analyte(s) of concern was <br /> analyzed and verified that instrument sensitivity was adequate to detect the analyte at the MRI,on the day <br /> of analysis. Because the sensitivity was shown to be adequate to detect the compound in question, the <br /> compound was not detected in the field sample(s), data quality is not significantly affected. No further <br /> corrective action was taken. <br /> General Chemistry Parameters <br /> 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 /> NELAP Accredited ACIL Seal of Excellence Award f.100 R.-,AM <br />