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i <br />r v - <br />Alpha Analytical Laboratories Inc. e-mail: clientservices@alpha labs.com <br />CHEMICAL EXAMINATION REPORT • Pat:e 23 of 50 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Report Date: 10/22/07 07:09 <br />Sacramento, CA 95833 <br />Project No: 18600251.02041 <br />Attn: Chani Leimbach <br />Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time <br />Client Code <br />Client PO/Reference <br />07J0352 10/06/2007 <br />13:00 <br />URS -SAC <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Spike <br />Source °/6REC <br />RPD <br />Analyte(s) <br />Result <br />PQL Units <br />Level <br />Result "/uREC Limits <br />RPD <br />Limit <br />Flag <br />Batch AJ71541 - EPA 3051 Microwave <br />Matrix Spike AJ71541-MS2 <br />Source: 07JO347-02 <br />Prepared: <br />10/15/07 Analyzed: 10/18/07 <br />Molybdenum <br />15.5 <br />10 <br />20.0 <br />ND 77.5 70-130 <br />Nickel <br />47.6 <br />10 <br />20.0 <br />26 108 70-130 <br />Sale <br />0.877 <br />1.0 <br />2.00 <br />ND 25.8 15-115 <br />Sd <br />17.3 <br />5.0 <br />20.0 <br />ND 86.5 70.130 <br />Tb <br />14.2 <br />7.0 <br />20.0 <br />ND 71.0 70-130 <br />Vanadium <br />88.5 <br />5.0 <br />20.0 <br />64 122 70-130 <br />121 <br />10 <br />20.0 <br />75 230 70-130 <br />QM -04, <br />Zinc <br />QM -4X <br />Matrix Spike Du AJ71541-MSDl <br />Source: 07JO352-01 <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />17.9 <br />15 mg/kg <br />20.0 <br />ND 89.5 70-130 <br />15.0 <br />20 <br />Arsenic <br />4.25 <br />2.0 <br />2.00 <br />2.2 102 70-130 <br />1.90 <br />20 <br />126 <br />10 <br />20.0 <br />87 195 70.130 <br />23.2 <br />20 <br />QM -04, <br />Barium <br />QM -4X <br />Beryllium <br />19.4 <br />0.75 <br />20.0 <br />ND 95.6 70.130 <br />3.05 <br />20 <br />17.8 <br />1.0 <br />20.0 <br />ND 89.0 70.130 <br />1.67 <br />20 <br />Cadmium <br />51.1 <br />5.0 <br />20.0 <br />24 136 70-130 <br />1.78 <br />20 <br />QM -04 <br />Chrormum <br />38.2 <br />10 <br />20.0 <br />14 121 70.130 <br />6.77 <br />20 <br />Cobalt <br />41.8 <br />10 <br />20.0 <br />21 104 70-130 <br />56.0 <br />20 <br />QM -04 <br />Copper <br />27.6 <br />5.0 <br />20.0 <br />6.6 105 70-130 <br />3.56 <br />20 <br />Lead <br />18.0 <br />10 <br />20.0 <br />ND 90.0 70-130 <br />1.10 <br />20 <br />Molybdenum <br />41.8 <br />10 <br />20.0 <br />18 119 70-130 <br />0.962 <br />20 <br />Nickel <br />0.989 <br />1.0 <br />2.00 <br />ND 30.4 15-115 <br />3.81 <br />20 <br />Selenium <br />22.2 <br />5.0 <br />20.0 <br />ND 111 70-130 <br />28.9 <br />20 <br />QM -01 <br />Silver <br />15.2 <br />7.0 <br />20.0 <br />ND 76.0 70-130 <br />9.40 <br />20 <br />Thallium <br />97.8 <br />5.0 <br />20.0 <br />65 164 70-130 <br />19.6 <br />20 <br />QM -04 <br />Vanadium <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of IV document. Tuts analytical report must be reproduced in its entirety. -73 -4-- <br />Bruce <br />4 --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 />