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Alpha VAnalytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 59 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 />0770347 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 />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 AJ71704 - VOAs in Soil GCMS <br />LCS (AJ71704-BS1) <br />Prepared & Analyzed: 10/16/07 <br />2-Chlorotoluene <br />0.0218 <br />0.0050 <br />0.0250 <br />87.2 <br />74-128 <br />4-Chlorotoluene <br />0.0212 <br />0.0050 <br />0.0250 <br />84.8 <br />79-125 <br />Dibromochloromethane <br />0.0242 <br />0.0050 <br />0.0250 <br />96.8 <br />76-146 <br />1,2-Dibromo-3-chlompropane <br />0.0286 <br />0.0050 <br />0.0250 <br />H4 <br />76-137 <br />1,2-Dibromoethane (EDB) <br />0.0228 <br />0.0050 <br />0.0250 <br />91.2 <br />76-131 <br />Dibromomethane <br />0.0232 <br />0.0050 <br />0.0250 <br />92.8 <br />79-123 <br />1,2 -Dichlorobenzene <br />0.0237 <br />0.0050 <br />0.0250 <br />94.8 <br />80-117 <br />1,3 -Dichlorobenzene <br />0.0200 <br />0.0050 <br />0.0250 <br />80.0 <br />74-128 <br />1,4 -Dichlorobenzene <br />0.0223 <br />0.0050 <br />0.0250 <br />89.2 <br />77-119 <br />Dichlorodifluoromethane <br />0.0250 <br />0.0050 <br />0.0250 <br />100 <br />45-180 <br />1,I-Dichloroethane <br />0.0230 <br />0.0050 <br />0.0250 <br />92.0 <br />74-124 <br />1,2-Dichloroethane <br />0.0238 <br />0.0050 <br />0.0250 <br />95.2 <br />76-113 <br />1,1-Dichloroethene <br />0.0256 <br />0.0050 " <br />0.0250 <br />102 <br />80-134 <br />cis-1,2-Dichloroethene <br />0.0250 <br />0.0050 <br />0.0250 <br />100 <br />82-126 <br />trans-1,2-Dichloroethene <br />0.0231 <br />0.0050 <br />0.0250 <br />92.4 <br />81-126 <br />1,2-Dichloropropane <br />0.0254 <br />0.0050 <br />0.0250 <br />102 <br />82-116 <br />1,3-Dichloropropane <br />0.0221 <br />0.0050 <br />0.0250 <br />88.4 <br />76-131 <br />2,2-Dichloropropane <br />0.0290 <br />0.0050 <br />0.0250 <br />116 <br />80-120 <br />1,1-Dichloropropene <br />0.0244 <br />0.0050 <br />0.0250 <br />97.6 <br />72-117 <br />cis-1,3-Dichloropropene <br />0.0303 <br />0.0050 <br />0.0250 <br />121 <br />81-130 <br />trans-1,3-Dichloropropene <br />0.0206 <br />0.0050 <br />0.0250 <br />82.4 <br />75-123 <br />Ethylbenzene <br />0.0229 <br />0.0050 <br />0.0250 <br />91.6 <br />86-120 <br />Hexacblorobutadiene <br />0.0218 <br />0.0050 <br />0.0250 <br />87.2 <br />75-127 <br />Isopropylbenzene <br />0.0203 <br />0.0050 <br />0.0250 <br />81.2 <br />76-115 <br />p-Isopropyltoluene <br />0.0214 <br />0.0050 <br />0.0250 <br />85.6 <br />77-124 <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 />Brace Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Ukiah, CA 95482 e 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 />