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Alpha VAnalytical Laboratories Inc. e-mail: clientservices®alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 46 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach <br />Order Number Receipt Date/Time Client Code <br />0710347 10/06/2007 13:00 URS -SAC <br />Report Date: 10/22/07 07:24 <br />Project No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <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 Lumt Flag <br />Batch AJ71626 - VOAs in Water GCMS <br />Blank (AJ71626-BLKI) <br />Prepared & Analyzed: 10/15/07 <br />y -- <br />Methylene chloride <br />ND <br />0.50 <br />Naphthalene <br />ND <br />0.50 " <br />n-Propylbenzene <br />ND <br />0.50 " <br />Styrene <br />ND <br />0.50 " <br />1,1,1,2 -Tetrachloroethane <br />ND <br />0.50 " <br />1,1,2,2 -Tetrachloroethane <br />ND <br />0.50 " <br />Tetrachloroethene <br />ND <br />0.50 " <br />Toluene <br />ND <br />0.30 " <br />1,2,3-Trichlorobenzene <br />ND <br />0.50 " <br />1,2,4-Trichlorobenzene <br />ND <br />0.50 " <br />1,1,1 -Trichloroethane <br />ND <br />0.50 " <br />1,1,2 -Trichloroethane <br />ND <br />0.50 <br />Trichloroethene <br />ND <br />0.50 <br />Trichlorofluoromethane <br />ND <br />0.50 <br />Trichlorotrifluoroethane <br />ND <br />0.50 " <br />1,2,3-Trichloropropane <br />ND <br />0.50 " <br />1,2,4-Trimethylbenzene <br />ND <br />0.50 " <br />1,3,5-Trimethylbenzene <br />ND <br />0.50 " <br />Vinyl chloride <br />ND <br />0.50 " <br />-,p-Xylene <br />ND <br />0.50 " <br />o -Xylene <br />ND <br />0.50 " <br />Xylenes (total) <br />ND <br />• 0.50 " <br />Surrogate: Dibromofluoromethane <br />28.5 <br />25.0 114 61-105 S -GC <br />Surrogate: Toluene -d8 <br />26.7 <br />25.0 107 69-115 <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 />