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i <br />Alpha PAnalytical Laboratories Inc. e-mail: clientservices®alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 54 of 68 <br />URS Corp - Sac <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 Daterrime 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 "/.REC RPD <br />Analyte(s) Result PQL Units Level Result °/"REC Limits RPD Limit Flag <br />Batch AJ71626 - VOAs in Water GCMS <br />Matrix Spike Dup (AJ71626-MSD1) <br />Source: 07JO416-01 <br />Prepared & Analyzed: <br />10/15/07 <br />2,2-Dichloropropme <br />10.8 <br />0.50 <br />10.0 <br />ND <br />108 <br />71-135 <br />6.70 <br />25 <br />1,1-Dichloropropene <br />10.6 <br />0.50 <br />10.0 <br />ND <br />106 <br />71-135 <br />8.25 <br />25 <br />cis-1,3-Dichloropropme <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />50-140 <br />4.65 <br />25 <br />tr,h#Dichloropropme <br />9.99 <br />0.50 <br />10.0 <br />ND <br />99.9 <br />55-126 <br />8.12 <br />25 <br />Eth nzene <br />12.0 <br />0.50 <br />10.0 <br />ND <br />120 <br />48-153 <br />6.01 <br />25 <br />Hexachlorobutadime <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />70-147 <br />6.45 <br />25 <br />Isopropylbenzene <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />65-128 <br />6.45 <br />25 _ <br />p-Isoprupyltoluene <br />12.1 <br />0.50 <br />10.0 <br />ND <br />121 <br />70.132 <br />8.62 <br />25 <br />Methyl ethyl ketone <br />18.7 <br />1.0 <br />20.0 <br />ND <br />93.5 <br />62-126 <br />5.49 <br />25 <br />Methyl isobutyl ketone <br />21.2 <br />1.0 <br />20.0 <br />ND <br />106 <br />66-127 <br />6.83 <br />25 <br />Methyl ten -butyl ether <br />9.80 <br />0.50 <br />10.0 <br />ND <br />98.0 <br />55-144 <br />4.81 <br />25 <br />Methylene chloride <br />9.62 <br />0.50 <br />10.0 <br />ND <br />96.2 <br />60-137 <br />6.22 <br />25 <br />Naphthalene <br />11.9 <br />0.50 <br />10.0 <br />ND <br />119 <br />64-143 <br />5.17 <br />25 <br />a-Propylbenzene <br />11.9 <br />0.50 <br />10.0 <br />ND <br />119 <br />66-138 <br />14.4 <br />25 <br />Styrene <br />12.5 <br />0.50 <br />10.0 <br />ND <br />125 <br />36-162 <br />5.76 <br />25 <br />1,1,1,2 -Tetrachloroethane <br />122 <br />0.50 <br />10.0 <br />ND <br />122 <br />56-137 <br />8.55 <br />25 <br />1,1,2,2 -Tetrachloroethane <br />11.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />63-121 <br />5.50 <br />25 <br />Tetrachloroethene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />49-148 <br />9.89 <br />25 <br />Toluene <br />12.1 <br />0.30 <br />10.0 <br />ND <br />121 <br />56-147 <br />5.08 <br />25 <br />1,2,3-Trichlorobenzene <br />11.6 <br />0.50 <br />10.0 <br />ND <br />116 <br />60-143 <br />6.22 <br />25 <br />1,2,4-Trichlorobenzene <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />65-134 <br />9.26 <br />25 <br />1,1,1-Trichloroethme <br />10.9 <br />0.50 <br />10.0 <br />ND <br />109 <br />62-144 <br />8.61 <br />25 <br />1,1,2-Trichloroethme <br />11.5 <br />0.50 <br />10.0 <br />ND <br />115 <br />62-129 <br />6.28 <br />25 <br />Trichloroethene <br />10.0 <br />0.50 <br />10.0 <br />ND <br />100 <br />58-140 <br />8.01 <br />25 <br />TrichlorofluommAme <br />10.3 <br />0.50 <br />10.0 <br />ND <br />103 <br />65-143 <br />8.08 <br />25 <br />The results in this report apply to the samples analyzed in accordance with the chain -n <br />of document. This analytical report must be reproduced m its entirety. 1 /��� <br />Bruce Gove /(J 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Uldah, 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 />