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0 <br />Alpha Analytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 27 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite <br />300 <br />Report Date: 10/22/07 07:24 <br />Sacramento, CA 95833 <br />Project No: 18600251.02041 <br />Attn: Chani Leimbach <br />Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Datefrime <br />Client Code <br />Client PO/Reference <br />07JO347 10/06/2007 <br />13:00 <br />URS -SAC <br />Metals by EPA 6000/7000 Series <br />Methods - Quality Control <br />Spike <br />Source °/.REC RPD <br />Analyte(s) <br />Result <br />PQL Units <br />Level <br />Result %REC Limits RPD Limit <br />Flag <br />Batch AJ71541- EPA 3051 Microwave <br />Matrix Spike AJ71541-MSI)Source: <br />07J0352-01 <br />Prepared: <br />10/15/07 Analyzed: 10/18/07 <br />Barium <br />159 <br />10 <br />20.0 <br />87 360 70-130 <br />QM -04, <br />QM -4X <br />Beryllium <br />20.0 <br />0.75 <br />20.0 <br />ND 98.6 70-130 <br />Cadmium <br />18.1 <br />1.0 <br />20.0 <br />ND 90.5 70-130 <br />Chromium <br />50.2 <br />5.0 <br />20.0 <br />24 131 70-130 <br />QM <br />Cobalt <br />35.7 <br />10 <br />20.0 <br />14 108 70-130 <br />Copper <br />74.3 <br />10 <br />20.0 <br />21 266 70.130 <br />QM -04 <br />Lead <br />28.6 <br />5.0 <br />20.0 <br />6.6 110 70-130 <br />Molybdenum <br />182 <br />10 <br />20.0 <br />ND 91.0 70-130 <br />Nickel <br />41.4 <br />10 <br />20.0 <br />18 117 70-130 <br />Selenium <br />0.952 <br />1.0 <br />2.00 <br />ND 28.6 15-115 <br />Silver <br />16.6 <br />5.0 <br />20.0 <br />ND 83.0 70-130 <br />1bailium <br />16.7 <br />7.0 <br />20.0 <br />ND 83.5 70-130 <br />Vanadium <br />119 <br />5.0 <br />20.0 <br />65 270 70-130 <br />QM -04 <br />96.4 <br />10 <br />20.0 <br />60 182 70-130 <br />QM -04 <br />Zinc <br />Matrix Spike AJ71541-MS2 <br />Source:07JO347-02 <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />14.3 <br />15 mg/kg <br />20.0 <br />ND 71.5 70-130 <br />Arsenic <br />5.01 <br />2.0 <br />2.00 <br />3.2 90.5 70-130 <br />Barium <br />89.8 <br />10 <br />20.0 <br />66 119 70-130 <br />Beryllium <br />19.5 <br />0.75 <br />20.0 <br />ND 95.4 70-130 <br />Cadmium <br />16.8 <br />1.0 <br />20.0 <br />ND 84.0 70-130 <br />Chromium <br />63.9 <br />5.0 <br />20.0 <br />43 104 70-130 <br />Cobalt <br />34.2 <br />10 <br />20.0 <br />13 106 70-130 <br />Copper <br />52.5 <br />10 <br />20.0 <br />27 128 70-130 <br />Lead <br />29.7 <br />5.0 <br />20.0 <br />10 98.5 70-130 <br />The results in this report apply to the samples analyzed in accordance with the chain A <br />of custody document. This analytical report must be reproduced in its entirely. -6 _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 />