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0 <br />Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 21 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 Datelrime Client Code Client PO/Reference <br />0710347 - 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 AJ71517 - Metals Digest <br />Blank (AJ71517-BLK1) <br />Prepared: 10/15/07 Analyzed: 10/16/07 <br />Silver <br />ND <br />0.010 <br />" <br />Thallium <br />ND <br />0.40 <br />^ <br />Vanadium <br />ND <br />0.50 <br />Zinc <br />ND <br />0.10 <br />^ <br />• <br />LCS (AJ71517-BSI) <br />Prepared: 10/15/07 Analyzed: 10/17/07 <br />Antimony <br />_ 0.214 <br />0.020 <br />mg/l <br />0.200 107 85-115 <br />Arsenic <br />0.0192 <br />0.0020 <br />0.0200 96.0 85-115 <br />Barium <br />0.233 <br />0.010 <br />0.200 116 87-124 <br />Beryllium <br />0.216 <br />0.010 <br />0.200 108 85-115 <br />Cadmium <br />0.224 <br />0.010 <br />0.200 112 85-115 <br />Chromium <br />0.214 <br />0.050 <br />0.200 107 85-115 <br />Cobalt <br />0216 <br />0.020 <br />0.200 108 85-115 <br />Copper <br />0.201 <br />0.10 <br />0.200 100 85-115 <br />Lead <br />0.219 <br />0.050 <br />0200 110 85-115 <br />Molybdenum <br />0.228 <br />0.50 <br />0.200 114 85-115 <br />Nickel <br />0.187 <br />0.10 <br />0.200 93.5 85-115 <br />Selcmiun <br />0.0175 <br />0.0050 <br />0.0200 87.5 70-118 <br />Silver <br />0.186 <br />0.010 <br />0.200 93.0 85-115 <br />Thallium <br />0.213 <br />0.40 <br />0200 106 85-115 <br />Vanadium <br />0,206 <br />0.50 <br />0.200 103 85-115 <br />Zinc <br />0.225 <br />0.10 <br />0.200 112 85-115 <br />Duplicate (AJ71517-DUPI) <br />Source: 07JO335-01 <br />Prepared: 10/15/07 Analyzed: 10/16/07 <br />Antimony <br />ND <br />0.020 <br />mg/l <br />ND <br />20 <br />Arsenic <br />ND <br />0.0020 <br />ND <br />20 <br />The results to this report apply to the samples analysed in accordance with <br />ir the chain 0 <br />of custody document This analytical report mast be 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 />