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fAsOlumbia <br /> 2655 Park Center Drive, Suite A Simi Valley, California 93065 (805)526-7161 (805)526-7270 fax Analytical nc <br /> Services <br /> An Employee-Owned Company <br /> Client: Shaw Environmental & Infrastructure, Inc. CAS Project No: P0800193 <br /> Project: Foothill Landfill, San Joaquin County/ 124591 (Leachate Module) <br /> CASE NARRATIVE <br /> The sarnple(s) were received intact under chain of custody on 02/06/08 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 sample(s) at the time <br /> of sample receipt. <br /> Volatile Organic Compounds by EPA Method 8260 <br /> Sample L-01 (P0800193-001) required a dilution due to matrix interference. The reporting limits are <br /> adjusted to reflect the dilution. <br /> Batch QC (Matrix Spike) was analyzed with the sample(s) and has been provided for informational <br /> purposes only. <br /> The spike recovery for Acrylonitrile in the Laboratory Control Sample(LCS) identified as PWG0800308- <br /> 3 was outside the lower control criterion. The error associated with reduced recovery equates to a <br /> potential low bias. However, the spike recovery was within the Continuing Calibration Verification <br /> (CCV) and Initial Calibration Verification (ICV) criteria of 70%-130%. The analyte(s) in question <br /> was/were not detected in the associated field sample(s); however, a Method Reporting Limit (MRL) <br /> check standard containing the analyte(s) of concern was analyzed and verified that instrument sensitivity <br /> was adequate to detect the analyte at the MRL on the day of analysis. Because the sensitivity was shown <br /> to be adequate to detect the compound in question, the compound was not detected in the field samples) <br /> and the DLCS verified extraction efficiency, data quality is not significantly affected. No further <br /> corrective action was taken. <br /> The upper control criterion was exceeded for sec-Butylbenzene in the Laboratory Control Sample (LCS) <br /> PWG0800308-3. The analyte(s) in question were not detected in the associated field samples. Since the <br /> error associated with the elevated recovery equates to a high bias, the sample data has not been <br /> significantly affected. The data has been flagged accordingly. No corrective action was required. <br /> i <br /> 1 <br /> 2 <br /> 1 <br /> NELAP Accredited ACIL Seal of Excellence Award „100%ftqeW <br />