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AlphWAnalytical Laboratories Inc. e-mail : clientservicesoalpha-labs.corn <br />URS Corp -Sac CHEMICAL EXAMINATION REPORT Page 59 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 Date/Time Client Code Client PO/Reference <br />0710347 10/06/2007 13:00 URS -SAC <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Spike Source °/aREC RPD <br />Analyte(s) Result PQL Units Level Result %REC Limits RPD Limit Flag <br />Batch AJ71704 - VOAs in Soil GCMS <br />LC�AJ71704-BSI) <br />Prepared & Analyzed: <br />10/16/07 <br />2-Chlorotolume <br />0.0218 <br />0.0050 <br />0.0250 <br />87.2 <br />74128 <br />4-Chlorotoluene <br />0.0212 <br />0.0050 <br />0.0250 <br />84.8 <br />79-125 <br />Dibromochlommethane <br />0.0242 <br />0.0050 <br />0.0250 <br />96.8 <br />76-146 <br />1,2-Dibromo3-chloropropane <br />0.0286 <br />0.0050 <br />0.0250 <br />114 <br />76-137 <br />1,2-Dibromoethane (EDB) <br />0.0228 <br />0.0050 <br />0.0250 <br />911 <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 />74128 <br />1,4 -Dichlorobenzene <br />0.0223 <br />0.0050 <br />0.0250 <br />89.2 <br />77-119 <br />DichlorodiHuoromedrane <br />0.0250 <br />0.0050 <br />0.0250 <br />100 <br />45-180 <br />1,1-Dichloroethane <br />0.0230 <br />0.0050 <br />0.0250 <br />92.0 <br />74124 <br />1,2-Dichloroethme <br />0.0238 <br />0.0050 <br />0.0250 <br />95.2 <br />76-113 <br />1,1-Dichlomethene <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-Dichloroethme <br />0.0231 <br />0.0050 <br />0.0250 <br />92.4 <br />81-126 <br />1,2-Dichloropropene <br />0.0254 <br />0.0050 <br />0.0250 <br />102 <br />82-116 <br />1,3-Dichloropropene <br />0.0221 <br />0.0050 <br />0.0250 <br />88.4 <br />76-131 <br />2,2-Dichloropropene <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 />Hexachlorobutadiene <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 />p4sopropyltoluene <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 analysed in accordance with the chain <br />Of custody document. This analytical report must be reproduced in its entirety. <br />Bruce Uove irector 1022/2007 <br />Corporate: 208 Mason St., Uldah, CA 95482 • Phone: Laboratory07) 4 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 />