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Alpha (Analytical Laboratories Inc. e-mail: clientservices®alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 48 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 3 00 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach <br />Order Number Receipt DateiTime Client Code <br />07JO347 10/06/2007 13:00 URS -SAC <br />Report Date: 10/22/07 07:24 <br />Proj ect No: 18600251.02041 <br />Project ID: DTSC FMS24 Phase 2 <br />CIient 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 AJ711626 - VOAs in Water GCMS <br />LCS (AJ71626-BSI) <br />_ <br />Prepared & Analyzed: 10/15/07 <br />1,3 -Dichlorobenzene <br />10.4 <br />0.50 <br />10.0 <br />104 <br />80-120 <br />1,4 -Dichlorobenzene <br />10.0 <br />0.50 <br />10.0 <br />100 <br />85-1I4 <br />Dichlorodifluoromethane <br />9.71 <br />0.50 <br />10.0 <br />97.1 <br />66-I69 <br />1,1 Dichloroethane <br />9.27 <br />0.50 <br />10.0 <br />92.7 <br />86-116 <br />1,2 Dichloroethane <br />8.86 <br />0.50 <br />10.0 <br />88.6 <br />77-115 <br />1,1-Dichlomethene <br />9.68 <br />0.50 <br />10.0 <br />96.8 <br />8I-139 <br />cis-1,2-Dichloroethene <br />9.60 <br />0.50. <br />10.0 <br />96.0 <br />90-120 <br />trans-1,2Dichloroethene <br />9.26 <br />0.50 <br />10.0 <br />92.6 <br />90-120 <br />1,2-Dichloropropane <br />9.53 <br />0.50 <br />10.0 <br />95.3 <br />82-112 <br />1,3-Dichloropropane <br />10.4 <br />0.50. <br />10.0 <br />104 <br />83-116 <br />2,2-Dichloropropane <br />8.91 <br />0.50 <br />10.0 <br />89.1 <br />80-125 <br />1,1-1)ichloropropene <br />9.42 <br />0.50 <br />10.0 <br />94.2 <br />86-116 <br />cis-1,3-Dichloropropene <br />10.1 <br />0.50 <br />10.0 <br />101 <br />85-116 <br />trans-I,3-Dichloropropene <br />8.73 <br />0.50 <br />10.0 <br />87.3 <br />76-115 <br />Ethylbenzene <br />11.0 <br />0.50 <br />10.0 <br />110 <br />84-122 <br />Hexachlorobutadiene <br />10.3 <br />0.50 <br />10.0 <br />103 <br />70-144 <br />Isopropylbenzene <br />102 <br />0.50 <br />10.0 <br />102 <br />75-116 <br />p Isopropyltoluene <br />11.1 <br />0.50 <br />10.0 <br />111 <br />78-121 <br />Methyl ethyl ketone <br />25.7 <br />1.0 <br />20.0 <br />128 <br />69-136 <br />Methyl isobutyl ketone <br />19.8 <br />1.0 <br />20.0 <br />99.0 <br />76-119 <br />Methyl tert-butyl ether <br />9.65 <br />0.50 <br />10.0 <br />96.5 <br />88-I21 <br />Methylene chloride <br />10.4 <br />0.50 <br />10.0 <br />104 <br />79-130 <br />Naphthalene <br />10.7 <br />0.50 <br />10.0 <br />107 <br />86-127 <br />n-Propylbenzene <br />10.7 <br />0.50 <br />10.0 <br />107 <br />75-127 <br />Styrene <br />11.3 <br />0.50 <br />10.0 <br />113 <br />80-125 <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of custody document. This analytical report must he reproduced in its entirety. 13 <br />Bruce Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707) 468-0401 a Fax: (707) 468-5267 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 • Fax: (925) 828-6309 <br />