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Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 67 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach <br />Order Number Receipt Date Time Client Code <br />07JO347 10/06/2007 13:00 URS -SAC <br />Notes and Definitions <br />Report Date: 10/22/07 07:24 <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Client PO/Reference <br />S -GC Surrogate recovery outside of control limits. The data was accepted based on valid recovery of the remaining <br />surrogates. <br />PI -0 I The Reporting Lieut for this analyte has been raised to account for matrix interference. <br />QM -4X 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 bas6d 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 />D-08 Results in the diesel organics range are primarily due to overlap from a gasoline range product. <br />DET Analyte DETECTED <br />ND Analyte NOT DETECTED at or above the reporting limit <br />NR Not Reported <br />dry Sample results reported on a dry weight basis <br />RPD Relative Percent Difference <br />Tire results in this report apply to the samples analyzed in accordance with the chain <br />of custody document. This analytical report must be reproduced in its entirety. <br />Bruce Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Ukiah, 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 />