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Alpha VAnalytical Laboratories Inc. <br />e-mail: clientservices@alpha-labs.COm <br />URS Corp -Sac CHEMICAL EXANUNATION REPORT <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:09 <br />Sacramento, CA 95833 Project No: 18600251.02041 <br />Attn: Chani Leimbach Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/time Client Code <br />07JO352 Client PO/Reference <br />10/06/2007 13:00 URS -SAC <br />Notes and Definitions <br />R-01 The Reporting Limit for this analyte has been raised to account for matrix interference. <br />QM4X The spike recovery was outside of QC acceptance limits for the MS and/or MSD due to analyte concentration <br />at 4 times or greater the spike concentration. The QC batch was accepted based on LCS and/or LCSD <br />recoveries within the acceptance limits. <br />QM -05 The spike recovery was outside acceptance limits for the MS and/or MSD due to matrix interference. The LCS <br />and/or LCSD were within acceptance limits showing that the laboratory is in control and the data is <br />acceptable. <br />QM -04 High RPD and/or poor percent recovery may reflect sample non -homogeneity. <br />QM -03 The spike recovery was high for this analyte. The batch was accepted based on a non -detect for the analyte. <br />QM -01 The spike recovery for this QC sample is outside of established control limits possibly due to a sample matrix <br />interference. <br />QL-03 Although the LCS/LCSD recovery for this analyte is outside of in-house developed control limits, it is within <br />the EPA recommended range of 70-130%. <br />DET <br />ND <br />Analyte DETECTED <br />Analyte NOT DETECTED at or above the reporting limit <br />Not Reported <br />Sample results reported on a dry weight basis <br />Relative Percent Difference <br />Practical Quantitation Limit <br />0 <br />Page 50 of 50 <br />Corporate: 208 Mason St., Uldah, CA 95482 • Phone: (707) 468-0401 • Fax: (707) 468-5267 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />0 <br />0 <br />