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0 <br />Alpha VAnaliytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 25 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:24 <br />Sacramento, CA 95833 Project No: 18600251.02041 <br />Attn: Chani Leimbach Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Datefrime Client Code ClientPO/Reference <br />07JO347 10/06/2007 13:00 URS -SAC <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Spike Source °/oREC RPD <br />Analyte(s) Result PQL Units Level Result °/aREC Limits RPD Limit Flag <br />Batch AJ71541- EPA 3051 Microwave <br />Blank (AJ71541-BLKI) <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Cobalt <br />ND <br />10 " <br />Copper <br />ND <br />10 " <br />Lead <br />Molybdenum <br />ND <br />ND <br />5.0 <br />10 " <br />Nickel <br />ND <br />10 " <br />Selenium <br />ND <br />1.0 " <br />Silver <br />- ND <br />5.0 " <br />Tballium <br />ND <br />7.0 " <br />Vanadium <br />ND <br />50 " <br />Zinc <br />ND <br />10 " <br />LCS (AJ71541-BSI) <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />22.1 <br />15 mg/kg <br />20.0 110 85-115 <br />Arsenic <br />221 <br />2.0 <br />2.00 110 80-120 <br />Barium <br />22.6 <br />10 <br />20.0 113 85-115 <br />Beryllium <br />20.4 <br />0.75 <br />20.0 102 85-115 <br />Cadmium <br />22.3 <br />1.0 <br />20.0 112 85-115 <br />Chromium <br />21.5 <br />5.0 <br />20.0 108 85.115 <br />Cobalt <br />21.5 <br />10 <br />20.0 '108 85-115 <br />Copper <br />18.6 <br />10 <br />20.0 93.0 85-115 <br />Lead <br />22.4 <br />5.0 <br />20.0 112 85-115 <br />Molybdenum <br />21.7 <br />10 <br />20.0 108 85-115 <br />Nickel <br />23.0 <br />10 <br />20.0 115 85-115 <br />Selenium <br />5.63 <br />1.0 <br />2.00 282 72-130 <br />QM -03 <br />Silver <br />17.5 <br />5.0 <br />20.0 87.5 78-108 <br />The results in this report apply to the samples analyzed in accordance tthe chain 0 <br />of custody document. Thu analytical report must be <br />be >eproduced to its entirety. <br />Bruce Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707) 468-0401 a Fax: (707) 468-5267 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />