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I <br />Alpha Analytical LaboratorleS Inc. a -mail: (O <br />clientservicesalpha-labs.com <br />URS Corp -Sac CHEMICAL EXAMINATION REPORT Page 53 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 ReceiptDatdTime Client Code ClientPO/Refermce <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 a/oREC Limits RPD Limit Flag <br />Batch AJ71626 - VOAs in Water GCMS <br />Matrix Spike Dup (AJ71626-MSDI) <br />Source: 07JO416-01 <br />Prepared & Analyzed: 10/15/07 <br />n-Butylbenzene <br />11.1 - <br />0.50 - <br />10.0 <br />ND <br />111 <br />74-138 <br />11.7 <br />25 <br />sec-Butylbenzene <br />12.7 <br />0.50 <br />10.0 <br />ND <br />127 <br />78-145 <br />7.35 <br />25 <br />tert-Butylbenzene <br />12.1 <br />0.50 <br />10.0 <br />ND <br />121 <br />71-139 <br />6.84 <br />25 <br />Carbon tetrachloride <br />11.0 <br />0.50 <br />10.0 <br />ND <br />110 <br />65-153 <br />10.0 <br />25 • <br />Chlorobenzene <br />1I.2 <br />0.50 <br />10.0 <br />ND <br />112 <br />57-136 <br />6.45 <br />25 <br />Chloroethane <br />9.66 <br />0.50 <br />10.0 <br />ND <br />96.6 <br />62-142 <br />2.30 <br />25 <br />Chloroform <br />9.87 <br />0.50 <br />10.0 <br />ND <br />98.7 <br />36-151 <br />3.61 <br />25 <br />Cbloromethme <br />9.89 <br />0.50 <br />10.0 <br />ND <br />98.9 <br />69-149 <br />1.63 <br />25 <br />2-Chloromluene <br />12.0 <br />0.50 <br />10.0 <br />ND <br />120 <br />70-137 <br />4.88 <br />25 <br />4-Chiorotolume <br />11.5 <br />0.50 <br />10.0 <br />ND <br />115 <br />50-134 <br />5.36 <br />25 <br />Dibromochloromethane <br />12.9 <br />0.50 <br />10.0 <br />ND <br />129 <br />62-141 <br />8.91 <br />25 <br />1,2-Dibromo-3-chloropropane <br />9.90 <br />0.50 <br />10.0 <br />ND <br />99.0 <br />59-134 <br />1.73 <br />25 <br />1,2-Dibromoethane (BDB) <br />11.6 <br />0.50 <br />10.0 <br />ND <br />116 <br />40-147 <br />7.14 <br />25 <br />Dibromomethane <br />9.93 <br />0.50 <br />10.0 <br />ND <br />993 <br />65-129 <br />5.06 <br />25 <br />1,2 -Dichlorobenzene <br />11.1 <br />0.50 <br />10.0 <br />ND <br />111 <br />57-137 <br />6.51 <br />25 <br />1,3 -Dichlorobenzene <br />11.1 <br />0.50 <br />10.0 <br />ND <br />ill <br />65-131 <br />6.51 <br />25 <br />1,4 -Dichlorobenzene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />61-131 <br />5.43 <br />25 <br />Dichlorodifluoromethane <br />9.86 <br />0.50 <br />10.0 <br />ND <br />98.6 <br />63-177 <br />4.46 <br />25 <br />i,l-Dichloroethane <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />64136 <br />5.64 <br />25. <br />1,2-Dichloroethme <br />9.61 <br />0.50 <br />10.0 <br />ND <br />96.1 <br />62-126 <br />3.17 <br />25 <br />1,1-Dichloroethene <br />11.3 <br />0.50 <br />10.0 <br />ND <br />113 <br />45-178 <br />5.45 <br />25 <br />cis-1,2-Dichloroethme <br />10.6 <br />.0.50 <br />10.0 <br />ND <br />106 <br />66-141 <br />3.85 <br />25 <br />trans-1,2-Dichloroethene <br />10.4 <br />0.50 <br />10.0 <br />ND <br />104 <br />59-151 <br />5.64 <br />25 <br />1,2-Dichloropropane <br />10.2 <br />0.50 <br />10.0 <br />ND <br />102 <br />62-128 <br />3.69 <br />25 <br />1,3-Dichloropropane <br />112 <br />0.50 <br />10.0 <br />ND <br />112 <br />67-126 <br />4.57 <br />25 <br />The results in this report apply to the samples analyzed to accordance with the chain <br />of =tody document This analytical report must be reproduced to 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 />