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Alpha VAna)ytical Laboratories Inc. e-mail: clientservices@alpha-Iabs.com <br />CHEMICAL EXAMINATION REPORT Page 47 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 />07JO347 I0/06/2007 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 AJ71626 - VOAs in Water GCMS <br />Blank (AJ71626-BLK1) <br />_ <br />Prepared & Analyzed: 10_/15107 <br />.Surrogate: Bromofluorobenzene <br />30.7 <br />25.0 <br />123 <br />75-126 <br />LCS (AJ71626-BSI) <br />Prepared & Analyzed: 10/1510.7 <br />Acetone <br />49.7 <br />5.0 ug/l <br />39.4 <br />126 <br />69-145 <br />Benzene <br />9.40 <br />0.30 <br />10.0 <br />94.0 <br />85-116 <br />Bromobenzene <br />11.0 <br />0.50 <br />10.0 <br />110 <br />83-120 <br />Bromochloromethane <br />9.69 <br />0.50 <br />10.0 <br />96.9 <br />86-115 <br />Bromodichloromethane <br />9.20 <br />0.50 <br />10.0 <br />92.0 <br />87-118 <br />Bromoform <br />10.8 <br />0.50 <br />10.0 <br />108 <br />79-132 <br />Bromomethane <br />8.95 <br />0.50 <br />10.0 <br />89.5 <br />69-145 <br />n-Butylbenzene <br />10.4 <br />0.50 <br />10.0 <br />104 <br />79-132 <br />sec-Butylbenzene <br />11.5 <br />0.50 <br />10.0 <br />115 <br />86-132 <br />tert-Butylbenzene <br />10.9 <br />0.50 <br />10.0 <br />109 <br />82-126 <br />Carbon tetrachloride <br />8.54 <br />0.50 <br />10.0 <br />85.4 <br />82-128 <br />Chlorobenzene <br />10.4 <br />0.50 <br />10.0 <br />104 <br />84-114 <br />Chloroethane <br />8.54 <br />0.50 <br />10.0 <br />85.4 <br />68-133 <br />Chloroform <br />9.06 <br />0.50 <br />I0.0 <br />90.6 <br />83-114 <br />Chloromethane <br />9.30 <br />0.50 <br />10.0 <br />93.0 <br />71-141 <br />2-Chlorotoluene <br />11.5 <br />0.50 <br />10.0 <br />115 <br />78-130 <br />4-Chlorotoluene <br />10.9 <br />0.50 <br />10.0 <br />109 <br />80-122 <br />Dibromochloromethane <br />10.6 <br />0.50 <br />10.0 <br />106 <br />81-124 <br />I,2-Dibromo-3-chloropropane <br />8.61 <br />.0.50 <br />10.0 <br />86.1 <br />74-124 <br />1,2-Dibromoethane (EDB) <br />10.3 <br />0.50 <br />10.0 <br />103 <br />80-118 <br />Dibromomethane <br />9.16 <br />0.50 <br />10.0 <br />91.6 <br />82-116 <br />I,2 -Dichlorobenzene <br />10.1 <br />0.50 <br />10.0 <br />I01 <br />86-115 <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 />