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Alpha VAnalytical Laboratories Inc. e-mail: clientsenAces@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 20 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 Date/Time Client Code Client PO/Reference <br />0770347 10/06/2007 13:00 URS -SAC <br />Metals by EPA 6000/7000 Series Methods - Quality Control <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 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 />Spike Source 0AREC RPD <br />Analyte(s) <br />Result <br />PQL <br />Units <br />Level Result %REC Limits RPD Limit Flag <br />Batch AJ71021 - EPA 7471A Hg Soil <br />Blank (AJ71021-BLK1) <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Mercury <br />ND <br />0.20 <br />mg/kg <br />-- -- <br />Duplicate (AJ71021-DUPI) <br />Source: 07JO347-02 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Mercury <br />ND <br />0.20 <br />mg/kg <br />ND 20 <br />_Matrix Spike (AJ71021-MS1) <br />Source: 07JO347-02 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Mercury <br />1.02 <br />0.20- <br />mg/kg <br />1.00 ND 102 60-140 <br />Matrix Spike (AJ71021-MSZ) <br />Source: 07JO352-09 <br />Prepared: I0/10/07 Analyzed: 10/11/07 <br />Mercury <br />0.960 <br />0.20 <br />mg/kg <br />1.00 ND 96.0 60-140 <br />Batch AJ71517 - Metals Digest <br />Blank (AJ71517-BLK1) <br />Prepared: 10/15/07 Analyzed: 10/16/07 <br />Antimony <br />ND <br />0.020 <br />mgll <br />Arsenic <br />ND <br />0.0020 <br />" <br />Barium <br />ND <br />0.010 <br />" <br />Beryllium <br />ND <br />0.010 <br />" <br />Cadmium <br />ND <br />0.010 <br />" <br />Chromium <br />ND <br />0.050 <br />" <br />Cobalt <br />ND <br />0.020 <br />" <br />Copper <br />ND <br />0.10 <br />" <br />Lead <br />ND <br />0.050 <br />" <br />Molybdenum <br />ND <br />0.50 <br />" <br />Nickel <br />ND <br />0.10 <br />" <br />Selenium <br />ND <br />0.0050 <br />" <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 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 />