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Alpha VAnalytical Laboratories Inc. <br />e-mail: clientservices®alpha-labs.com <br />URS Corp -Sac CHEMICAL EXAM)NATION REPORT <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:09 <br />Sacramento, CA 95833 <br />Attn: Chani Leimbach Project No: 18600251.02041 <br />Project o: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time Client Code <br />0770352 10/06/2007 13:00URS-SAC ClientPO/Reference <br />Volatile Organic Compounds by EPA Method 8260B - <br />Quality Control <br />Spike Source •/�C RPD <br />Result PQL Units Level Result °/uREC Limits <br />RPP r:.-.:. <br />Batch AJ71704 - VOAs in Soil GCMS <br />0 <br />Page 44 of 50 <br />Flag <br />Bromobenzene <br />0.0124----- <br />0.0050 <br />n atyzea: rU/l b/U7 <br />Bromochlmamethane <br />0.0171 <br />0.0231 ND <br />53.7 <br />31-144 <br />13romodichloromethme0.0231 <br />0.0050 " <br />ND <br />74.0 <br />58-129 <br />Bromoform <br />0.0179 <br />0.0050 <br />0.0231 ND <br />77.5 <br />34-160 <br />Bromomethane <br />0.0134 <br />0.0050 <br />0.0231 ND <br />58.0 <br />22-166 <br />n-Butylbenzene <br />0.0176 <br />0.0050 " <br />0 .0231 ND <br />7fi.2 <br />10-153 <br />sec-Butylbenzene <br />0.0156 <br />0.0050 <br />0.0231 ND <br />67.5 <br />0-182 <br />tert-Butylbenzene <br />0.0140 <br />0.0050 " <br />0.0231 ND <br />60.6 <br />0-187 <br />Carbon tetrachloride <br />0.0152 <br />0.0050 <br />0.0231 Nb <br />65.8 <br />0.179 <br />Chlorobenzene <br />0.0176 <br />0.0050 ^ <br />0.0231 ND <br />76.2 <br />10.189 <br />Chloroethane <br />0.0134 <br />0.0050 " <br />0.0231 ND <br />58.0 <br />32-139 <br />Chloroform <br />0.0193 <br />0.0050 n <br />0.0231 ND <br />83.5 <br />46-141 <br />Chloromethane <br />0.0194 <br />0.0050 " <br />00231 ND <br />70.6 <br />57-127 <br />2-Chlorotoluene <br />0.0217 <br />0.0050 <br />0..0231 ND <br />93.9 <br />30-175 <br />4-Chlorotoluene <br />0.0132 <br />0.0050 " <br />0.0231 ND <br />57.1 <br />16-158 <br />Dibromochloromethane <br />0.0119 <br />0.0050 " <br />0.0231 ND <br />51.5 <br />13-155 <br />1,2-Dibromo-3-chloropropane <br />0.0159 <br />0.0168 <br />0.0050 <br />0.0231 ND <br />68.8 <br />34.160 <br />1,2-Dibromoethme (EDB) <br />0.0141 <br />0.0050 <br />0.0231 ND <br />72.7 <br />24-153 <br />Dibromomethane <br />0.0050 " <br />0.0231 ND <br />61.0 <br />52-129 <br />1,2 -Dichlorobenzene <br />0.0158 <br />0.0050 " <br />0.0231 ND <br />68.4 <br />58-125 <br />1,3-Dichlombenzene <br />0.0139 <br />0.0050 <br />0.0231 ND <br />60.2 <br />1 <br />1,4 -Dichlorobenzene <br />0.0101 <br />0.0050 <br />0.0231 ND <br />43.7 <br />111-143 <br />-150 <br />Dichlorodifluoromethane <br />0.0131 <br />0.0050 " <br />0.0231 ND <br />56.7 <br />31-135 <br />1,1-Dichloroethane <br />0.0217 <br />0.0050 " <br />0.0231 ND <br />93.9 <br />28-190 <br />1,2-Dichloroethme <br />0.0178 <br />0.0050 ^ <br />0.0231 ND <br />77.1 <br />58-131 <br />0.0163 <br />0.0050 " <br />0.0231 ND <br />70.6 <br />61-114 <br />The results in this report apply to the samples analyzed m accordance with the chain <br />of-tody doctonent. Thin analytical <br />report must be reproduced in <br />its entirety. <br />�1p <br />Bruce Gove <br />Corporate: 208 Mason St., Ukiah, <br />CA 95482 • <br />Director <br />Phone: (707) <br />10/22/2007 <br />Service Center: <br />6398 Dougherty Rd., Suite 3, Dublin, CA <br />468 <br />94568 1 Phone: <br />0401 • Fax: (707) 468-5267 <br />(925) 828-6226 <br />• Fax: (925) 828-6309 <br />