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i <br />Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />URS Corp -Sac CHEMICAL EXAMINATION REPORT PaRe 49 of 68 <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 Receipt Datefrime Client Code <br />0770347 10/06/2007 13:00 URS -SAC <br />Client PO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source aAoREC RPD <br />Analyte(s) Result PQL Units Level Result a/.REC Limits RPD Limit Flag <br />Batch AJ71626 - VOAs in water GCMS <br />LCS (A771626 -BSI) <br />20.2 <br />25.0 <br />Prepared & Analyzed: 10/15/07 <br />1,1,1,2 -Tetrachloroethane <br />10.5 <br />0.50 <br />10.0 <br />105 <br />79-118 <br />1,1,2,2 -Tetrachloroethane <br />10.2 <br />0.50 <br />10.0 <br />102 <br />81-112 <br />Tetrachloroethene - <br />132 <br />0.50 <br />10.0 <br />132 <br />80-127 QM -03• <br />Toluene <br />11.1 <br />0.30 <br />10.0 <br />111 <br />76-13? <br />1,2,3-Trichlombenzene <br />10.8 <br />0.50 <br />10.0 <br />108 <br />84-128 <br />1,2,4-Tricldorobenzene <br />10.7 <br />0.50 <br />10.0 <br />107 <br />85-123 <br />1,1,1 -Trichloroethane <br />8.81 <br />0.50 <br />10.0 <br />88.1 <br />86-117 <br />1,1,2 -Trichloroethane <br />10.4 <br />0.50 <br />10.0 <br />104 <br />83-115 <br />Trichloroethene <br />9.27 <br />0.50 <br />10.0 <br />92.7 <br />84114 <br />Trichlorofluoromethane <br />9.12 <br />0.50 <br />10.0 <br />91.2 <br />74130 <br />Trichloromfluoroethane <br />8.76 <br />0.50 <br />9.84 <br />89.0 <br />87-121 <br />1,2,3-Triehloropropme <br />10.2 <br />0.50 <br />10.0 <br />102 <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-Trimetbylbenzene <br />10.8 <br />0.50 <br />10.0 <br />108 <br />82-124 <br />Vinyl chloride <br />9.48 <br />0.50 <br />10.0 <br />94.8 <br />61-140 <br />m,p-Xylene <br />19.9 <br />0.50 <br />20.0 <br />99.5 <br />81-124 <br />0 -Xylene <br />11.1 <br />0.50 <br />10.0 <br />Ill <br />80-126 <br />Xylenes (total) <br />31.0 <br />0.50 <br />30.0 <br />103 <br />81-126 <br />Surrogate: Dibromgjluoromethane <br />20.2 <br />25.0 <br />80.8 <br />61-705 <br />Surrogate: Toluene -d8 <br />26.2 <br />25.0 <br />105 <br />69-115 <br />Surrogate: BromoJluoroberaene <br />30.9 <br />25.0 <br />124 <br />75-126 <br />Matrix Spike (AJ71626-MS1) . Source: 07JO416-01 Prepared & Analyzed: 10/15/07 <br />Acetone 24.9 5.0 ug/1 39.4 ND 63.2 40-147 <br />Benzene 9.81 0.30 " 10.0 ND 98.1 57-141 <br />Thestos in this report apply to the samples antlered to accordance with the chain -� /J 0 <br />of custody dacumen. This analytical report must be reproduced in its entirety. 1 / <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 a Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />