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Alpha VAnalyticaI Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 26 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 Daterfime Client Code Client PO/Reference <br />0720347 10/06/2007 13:00 URS -SAC <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Spike Source %REC RPD <br />Analyte(s) Result PQL Units Level Result %REC Limits RPD Limit Flag <br />Batch AJ71541 - EPA 3051 Microwave <br />LCS (AJ71541-BSI) <br />Prepared: 10/15/07 Analyzed: 10/1_8107 <br />u <br />Thallium <br />21.1 7.0 <br />20.0 106 85-115 <br />Vanadium <br />20.0 ' 5.0 <br />20.0 100 85-115 <br />Zinc <br />22.4 10 <br />20.0 112 85-115 <br />Duplicate (AJ71541-DUPI) <br />Source: 07JO352-01 <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />ND 15 mg/kg <br />ND <br />20 <br />_ <br />Arsenic <br />2.58 2.0 <br />2.2 <br />15.9 <br />20 <br />Barium <br />108 10 <br />87 <br />21.5 - <br />20 <br />QM -04 <br />Beryllium <br />ND 0.75 <br />ND <br />20 <br />Cadmium <br />ND 1.0 <br />ND <br />20 <br />Chromium <br />33.8 5.0 <br />24 <br />33.9 <br />20 <br />QM -04 <br />Cobalt <br />19.2 10 <br />14 <br />31.3 <br />20 <br />QM -04 <br />Copper <br />25.1 10 <br />21 <br />17.8 <br />20 <br />Lead <br />7.50 5.0 <br />6.6 <br />12.8 <br />20 <br />Molybdenum <br />ND 10 <br />ND <br />20 <br />Nickel <br />21.6 10 <br />18 <br />18.2 <br />20 <br />Selenium <br />ND Lo <br />ND <br />20 <br />Silver <br />ND 5.0 <br />ND <br />20 <br />Thallium <br />ND 7.0 <br />ND <br />20 <br />Vanadium <br />83.9 5.0 <br />65 <br />25.4 <br />20 <br />QM -04 <br />Zino <br />51.8 10 <br />60 <br />14.7 <br />20 <br />Matrix Spike (AJ71541-MSI) <br />Source: 07J0352-01 <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />15.4 15 mg/kg <br />20.0 ND 77.0 70-130 <br />Arsenic <br />4.17 2.0 <br />2.00 2.2 98.5 70-130 <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. <br />Bruce Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Masan 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 />