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Alpha YAnalytical Laboratories Inc. <br />e-mail: clientservices@alpha-IabS.COM <br />URS Corp -Sac CHEMICAL EXAMINATION 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 Datetrime <br />Client Code <br />0710352 10/06/2007 13:00URS-SAC Client PO/Reference <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Result <br />Batch AJ71517 - Metals Digest <br />Spike Source %REC RPD <br />Units Level Result %REC Limits RPD Limit <br />Silver <br />ND <br />0.010 <br />Thallima <br />ND <br />0.40 " <br />Vanadium <br />ND <br />0.50 " <br />Zinc <br />ND <br />0.10 " <br />0 <br />Page 16 of 50 <br />Flag <br />16 <br />LCS (AJ71517-BS11 <br />Antimony <br />Prepared• <br />10/15/07 Analyzed <br />10/17/07 <br />Arsenic <br />0.214 <br />0.020 mg/l <br />0.200 <br />107 <br />85-115 <br />Biu <br />0.0192 <br />0.0020 <br />0.0200 <br />96.0 <br />85-115 <br />Beryllium <br />0.233 <br />0.010 <br />0.200 <br />116 <br />87-124 <br />Cadmium <br />0.216 <br />0.010 " <br />0200 <br />108 <br />85-115 <br />Chromium <br />0.224 <br />0.010 <br />0.200 <br />112 <br />85-115 <br />Cobalt <br />0214 <br />0.050 <br />0.200 <br />107 <br />85-115 <br />Copper <br />0.216 <br />0.020 " <br />0.200 <br />108 <br />85-115 <br />Lead <br />0.201 <br />0.10 <br />0200 <br />100 <br />85-115 <br />Molybdenum <br />0.219 <br />0.050 <br />0.200 <br />110 <br />85-115 <br />Nickel <br />0228 <br />0.50 " <br />0.200 <br />114 <br />85-115 <br />Selenium <br />0.187 <br />0.10 <br />0200 <br />93.5 <br />85-115 <br />Silver <br />0.0175 <br />0.0050 <br />0.0200 <br />87.5 <br />70-118 <br />Thatlium <br />0.186 <br />0.010 <br />0200 <br />93 <br />85-115 <br />Vanadium <br />0.213 <br />0.40 <br />0200 <br />1066 <br />85-115 <br />Zinc <br />0.206 <br />0.50 <br />0.200 <br />103 <br />85-115 <br />0.225 <br />0. <br />_ 10 <br />0.200 <br />112 <br />85-115 <br />Arsenic <br />ND 0.020 m9tl ND <br />ND 0.0020 " ND <br />20 <br />20 <br />The results in this report apply to the samples anal).ed in accordance with the chain <br />of CUstody document. This analytical report must be reproduced in its enWety. f Bruce GoveLaboratoDirector 10/22/2007 <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707) 46 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 />