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Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAAMINATION REPORT Page 22 of 68 <br />URS Corp - Sac <br />2870 Gatewav 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 Date/Time Client Code Client PO/Reference <br />0710347 10/06/2007 13:04 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 FIag <br />Batch AJ71517 - Metals Digest <br />Duplicate (AJ71517-DUPI) <br />Source: 07JO335-01 <br />Prepared: 10/15/07 Analyzed: 10/16/_07 <br />Barium <br />0.0116 <br />0.010 <br />0.013 <br />11.4 <br />20 <br />Beryllium <br />ND <br />0.010 <br />ND <br />20 <br />Cadmium <br />ND <br />0.010 <br />ND <br />20 <br />Chromium <br />ND <br />0.050 <br />ND <br />20 <br />Cobalt <br />ND <br />0.020 <br />ND <br />20 <br />Copper <br />ND <br />0.10 <br />ND <br />20 <br />Lead <br />ND <br />0.050 <br />ND <br />20 <br />Molybdenum <br />Nil <br />0.50 <br />ND <br />20 <br />Nickel <br />ND <br />0.10 <br />ND <br />20 <br />Selenium <br />ND <br />0.0050 " <br />ND <br />20 <br />Silver <br />ND <br />0.010 <br />ND <br />20 <br />Thallium <br />ND <br />0.40 <br />ND <br />20 <br />Vanadium <br />ND <br />0.50 <br />ND <br />20 <br />Zinc <br />ND <br />0.10 <br />ND <br />20 <br />Matrix Spike (AJ71517-MSI) <br />Source: 07JO335-01 <br />Prepared: 101_15107 <br />- <br />Analyzed: 10/16/07 <br />Antimony <br />0.214 <br />0.020 mgll <br />0.200 <br />ND <br />107 <br />70-130 <br />Arsenic <br />0.0199 <br />0.0020 <br />0.0200 <br />ND <br />94.0 <br />70-130 <br />Barium <br />0.235 <br />0.0I0 <br />0.200 <br />0.013 <br />111 <br />70-130 <br />Beryllium <br />0.205 <br />0.0I0 <br />0.200 <br />ND <br />102 <br />70-130 <br />Cadmium <br />0.210 <br />0.010 <br />0.200 <br />ND <br />I05 <br />70-130 <br />Chromium <br />0.201 <br />0.050 <br />0.200 <br />ND <br />100 <br />70-130 <br />Cobalt <br />0.207 <br />0.020 <br />0.200 <br />ND <br />104 <br />70-130 <br />Copper <br />0.191 <br />0.10 " <br />0.200 <br />ND <br />95.5 <br />70-130 <br />Lead <br />0.197 <br />0.050 <br />0.200 <br />ND <br />98.5 <br />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 he 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 />