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Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 32 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 />Report Date: 10/22/07 07:24 <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />Client PO/Reference <br />TPH by EPAILUFT GC/GCMS Methods - Quality Control <br />Spike Source %REC . RPD <br />Analyte(s) Result PQL Units Level Result %REC Limits RPD Limit Flag <br />Batch AJ71623 - CA LUFT - orb shaker <br />LCS (AJ71623-BS1) - Prepared & Analyzed: 10/16/07 <br />TPH as Diesel 34.6 1.0 mg/kg 40.3 85.9 63-126 <br />Surrogate: Tetratetracontane 2.04 1.45 141 20-152 <br />Matrix Spike. AJ71623-MSI) Source: 07J0347-18 Prepared & Analyzed: 10/16/07 <br />TPH as Diesel 33.9 1.0 mg/kg 40.3 ND 84.1 61-134 <br />Surrogate: Tetratetracontane 2.06 " 1.45 142 20452 <br />Matrix Spike Dup (AJ71623-MSD/) Source: 07JO347-18 Prepared & Analyzed: 10/16/07 <br />TPH as Diesel 34.5 1.0 mgtkg 40.3 ND Y 85.6 61-134 1.75 20 <br />Surrogate: Tetratetracontane 2.02 1.45 139 20-152 <br />The 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. —6 � <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 Ad., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />