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Alpha VAnalytical 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 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 />07J0347 10/06/2007 13:00 URS -SAC <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Analyte(s) <br />Result <br />PQL Units <br />Spike <br />Level <br />Source <br />Result <br />%REC <br />%REC RPD <br />Limits RpD Limit <br />Flag <br />Batch AJ71541- EPA 3051 Microwave <br />70-I30 <br />Arsenic <br />5.01 <br />2.0 <br />2.00 <br />3.2 <br />90.5 <br />Matrix Spike AJ71541-MS1 <br />Source: 07J0352-01 <br />Prepared: <br />10/15/07 <br />Analyzed: 10/18/07 <br />66 <br />Barium <br />159 <br />10 <br />20.0 <br />87 <br />360 <br />70-130 <br />QM -04, <br />70-130 <br />Cadmium <br />16.8 <br />lA <br />20.0 <br />ND <br />84.0 <br />QM -4X <br />Beryllium <br />20.0 <br />0.75 <br />20.0 <br />ND <br />98.6 <br />70-130 <br />Cobalt <br />Cadmium <br />18.1 <br />1.0 <br />20.0 <br />ND <br />90.5 <br />70-130 <br />52.5 <br />Chromium <br />50.2 <br />5.0 <br />20.0 <br />24 <br />131 <br />70-130 <br />QM -04 <br />Cobalt <br />35.7 <br />10 <br />20.0 <br />14 <br />108 <br />70-130 <br />Copper <br />74.3 <br />10 <br />20.0 <br />21 <br />266 <br />70-130 <br />QM -04 <br />Lead <br />28.6 <br />5.0 <br />20.0 <br />6.6 <br />110 <br />70-130 <br />Molybdenum <br />18.2 <br />10 <br />20.0 <br />ND <br />91.0 <br />70-130 <br />Nickel <br />41.4 <br />10 <br />20.0 <br />18 <br />117 <br />70130 <br />Selenium <br />0.952 <br />1.0 <br />2.00 <br />ND <br />28.6 <br />15-115 <br />silver <br />16.6 <br />5.0 <br />20.0 <br />ND <br />83.0 <br />70-130 <br />Thallium <br />16.7 <br />7.0 <br />20.0 <br />ND <br />83.5 <br />70-130 <br />Vanadium <br />119 <br />5.0 <br />20.0 <br />65 <br />270 <br />70-130 <br />QM -04 <br />Zinc <br />96.4 <br />10 <br />20.0 <br />60 <br />182 <br />70-130 <br />QM -04 <br />Matrix Spike (AJ71541-MSZ) <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 <br />71.5 <br />70-I30 <br />Arsenic <br />5.01 <br />2.0 <br />2.00 <br />3.2 <br />90.5 <br />70-130 <br />Barium <br />89.8 <br />10 " <br />20.0 <br />66 <br />119 <br />70-130 <br />Beryllium <br />I9.5 <br />0.75 <br />20.0 <br />ND <br />95.4 <br />70-130 <br />Cadmium <br />16.8 <br />lA <br />20.0 <br />ND <br />84.0 <br />70-130 <br />Chromium <br />63.9 <br />5.0 <br />20.0 <br />43 <br />104 <br />70-130 <br />Cobalt <br />34.2 <br />10 <br />20.0 <br />13 <br />106 <br />70-130 <br />Copper <br />52.5 <br />10 <br />20.0 <br />27 <br />128 <br />70-130 <br />Lead <br />29.7 <br />5.0 <br />20.0 <br />10 <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. 13 <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 />