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Alpha VAnalytical Laboratories Inc. e-mail- clientservlces@alpha-labs.com <br />CHEMICAL EXAADNATION REPORT Page 24 of 50 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:09 <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 <br />07JO352 10/06/2007 13:00 URS -SAC <br />Client PO/Reference <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Spike Source %REC RPD <br />Analyte(s) Result PQL Units LeveI Result %REC Limits RPD Limit Flag <br />Batch AJ71541 - EPA 3051 Microwave <br />Matrix S ikeDu AJ71541-MSDI <br />Source: 07JO352-01 <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Zinc <br />78.3 10 <br />20.0 60 91.5 70-130 20.7 20 QM -04 <br />Batch AJ71607 - EPA 7470A <br />Blank.(AJ71607-BLK1) <br />Prepared: 10/18/07 Analyzed: 10/19/07 <br />Mercury <br />ND 0.0010 mgtl <br />- <br />LCS (A.J71607-BSI) <br />Prepared: 10/18/07 Analyzed: 10/19/07 <br />Mercury <br />0.00231 0.0010 mg/l <br />0.00250 92.4 80-120 <br />Duplicate (AJ71607-DUPI) <br />Source. 07J0347-01 <br />Prepared: 10/18/07 Analyzed: 10/19/07 <br />Mercury <br />ND 0.0010 mgll <br />ND 20 <br />Matrix Spike (AJ71607-MSI) <br />Source: 07J0347-01 <br />Prepared: 10/18/07 Analyzed: 10/19/07 <br />Mercury <br />0.00246 0.0010 mg/1 <br />0.00250 ND 98.4 60-140 <br />Matrix Spike (AJ71607-MS2) <br />_ Source: 07JO389-03 <br />Prepared: 10/18/07 Analyzed: 10/19/07 <br />Mercury <br />0.00210 0.0010 mg/1 <br />0.00250 ND 75.2 60-140 <br />Matrix Spike Dup (AJ71607-MSDI) <br />Source: 07JO347-01 <br />Prepared: 10/18/07 Analyzed: 10/19/07 <br />Mercury <br />0.00247 0.0010 mgll <br />0.00250 ND 98.8 60-140 0.406 20 <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. w ` <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 />