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Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 44 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 <br />0770347 <br />Receipt Date/time <br />10/06/2007 13:00 <br />Client Code <br />URS -SAC <br />Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source %REC RPD <br />Analyte(s) Result PQL Units Level Result %REC Limits RpD Limit Flag <br />Batch AJ71206 - VOAs in Water GCMS <br />Matrix Spike yup (AJ71206-MSD1) <br />Source: 07.10309-01 <br />Prepared: 1.0110/07 Analyzed: 10/11/07 <br />-� <br />Surrogate: Dibromojluoromethane <br />21.1 <br />" <br />25.0 84.4 61-105 -- <br />Surrogate: Toluene -d8 <br />23.3 <br />" <br />25.0 93.2 69-115 <br />Surrogate: Bromojluorobenzene <br />30.0 <br />" <br />25.0 120 75-126 <br />Batch AJ71626 - VOAs in 'Water GCMS <br />Blank (AJ71626-BLK1) <br />Prepared & Analyzed: 10/15/07 <br />Acetone <br />ND <br />5.0 ugll <br />- <br />Benzene <br />ND <br />0.30 " <br />Bromobenzene <br />ND <br />0,50 " <br />Bromochloromethane <br />ND <br />0.50 , " <br />Bromodichloromethane <br />ND <br />0.50 " <br />Bromoform <br />ND <br />0.50 " <br />Bromomethane <br />ND <br />0.50 " <br />n-Butylbenzene <br />ND <br />0.50 " <br />sec-Butylbenzene <br />ND <br />0.50 " <br />tert-Butylbenzene <br />ND <br />0.50 " <br />Carbon tetrachloride <br />ND <br />0.50 " <br />Chlorobenzene <br />ND <br />0.50 " <br />Chloroethane <br />ND <br />0.50 " <br />Chloroform <br />ND <br />0.50 " <br />Chloromethane <br />ND <br />0.50 " <br />2-Chlorotoluene <br />ND <br />'0.50 " <br />4-Chlorotoluene <br />ND <br />0.50 " <br />Dibromochloromethane <br />ND <br />0.50 " <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 />