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Alpha VAnalytical Laboratories Inc. e-mail. clientservices@alpha-labs.com <br />CHEMICAL EXANIINATION REPORT Page 38 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 />07J0347 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 Limit Flag <br />Batch AJ71206 - VOAs in Water GCMS <br />LCS AJ71206-BSI)Prepared: <br />21.2 <br />25.0 <br />10/10/07 Analyzed: 10/11/07 <br />Trichloroethene <br />10.1 <br />0.50 <br />10.0 <br />101 <br />84-114 <br />Trichlorofluoromethane <br />10.6 <br />0.50 <br />10.0 <br />106 <br />74-130 <br />Trichlorotrifluoroethane - <br />9.77 <br />0.50 <br />9.84 <br />99.3 <br />87-121 <br />1,2,3-Tricbloropropane <br />10.7 <br />0.50 <br />10.0 <br />107 <br />78-112 <br />1,2,4-Trimethylbenzene <br />11.4 <br />0.50 <br />10.0 <br />114 <br />83-127 <br />1,3,5 Trimethylbenzene <br />11.0 <br />0.50 <br />10.0 <br />110 <br />82-124 <br />Vinyl chloride <br />12.3 <br />0.50 <br />10.0 <br />123 <br />61-140 <br />m,p-Xylene <br />21.2 <br />0.50 <br />20.0 <br />106 <br />81-124 <br />o -Xylene <br />10.8 <br />0.50 <br />10.0 <br />108 <br />80-126 <br />Xylenes (total) <br />32.0 <br />0.50 <br />30.0 <br />107 <br />81-126 <br />Surrogate: Dibromofluoromethane <br />21.2 <br />25.0 <br />84.8 <br />61-105 <br />Surrogate: Toluene -d& <br />23.6 <br />25.0 <br />94.4 <br />69-115 <br />Surrogate: Bromofluorobenzene <br />3a6 <br />25.0 <br />122 <br />75-126 <br />Matrix Spike AJ71206-MSI) <br />_ Source: 07JO309-01 <br />Prepared: 10/10/07 Analyzed: 10/11/07 <br />Acetone <br />42.7 <br />5.0 ugll <br />39.4 <br />ND <br />108 <br />40-147 <br />Benzene <br />1I.0 <br />0.30 <br />10.0 <br />ND <br />110 <br />57-141 <br />Bromobenzene <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />65-135 <br />Bromochloromethane <br />1I.0 <br />O.SO <br />10.0 <br />ND <br />110 <br />69-131 <br />Bromodichloromethane <br />11.6 <br />0.50 <br />10.0 <br />ND <br />116 <br />62-140 <br />Bromoform <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />55-151 <br />Bromomethane <br />12.2 <br />-0.50 <br />10.0 <br />ND <br />122 <br />43-I62 <br />n-Butylbenzene <br />10.9 <br />0.50 <br />10.0 <br />ND <br />109 <br />74-138 <br />see-Butylbenzene <br />11.8 <br />0.50 " <br />10.0 <br />ND <br />118 <br />78-145 <br />tert-Butylbenzene <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />71-139 <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 />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 />