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F i <br /> • 885 Jarvis Drive <br />{ Sequoia Morgan Hill,CA 95037 <br /> (409)776-9600 <br /> Analytical FAX(408)782-6308 <br /> i www.sequoialabs.com <br /> URS Corporation[Arco]] Project:ARCO#2168,Stockton,CA MOK0900 <br /> 2870 Gateway Oaks Or.,Ste 300 Project Number:GOC8 1-00 10 Reported: <br /> i Sacramento CA,95833 Project ManagerNernon P.Elarth 11/30/05 12:28 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> j Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzod Method Note <br /> MW-9-20(MOK0900-08)Soil Sampled: 11/15/0514:56 Received:11/17/05 08:30 <br /> i., tert-Amyl methyl ether ND 0.0040 mg/kg 0.8 5K23041 11/23/05 11/24/05 EPA 8260B <br /> Benzene ND 0.0040 <br /> tert-Butyl alcohol ND 0.016 " <br /> i Di-isopropyl ether ND 0.0040 <br /> 1,2-Dibromoethane(EDB) ND 0.0040 <br /> 1,2-Dichloroethane ND 0.0040 " <br /> Ethanol ND 0.080 <br /> # Ethyl tert-butyl ether ND 0.0044 " <br /> Ethylbenzene ND 0.0040 " <br /> Methyl tert-butyl ether ND 0.0044 " <br /> Toluene ND 0.0040 " <br /> Xylenes(total) ND 0.0040 " <br /> Gasoline Range Organics(C4-C12) ND 0.080 <br /> r <br /> Surrogate; 1,2-Dichloroethane-d4 89% 60-125 <br /> MW-10-20(MOK0900-09)Soil Sampled: 11/15/05 08:25 Received:11/17/45 08:30 <br /> tert-Amyl methyl ether ND 0.0038 mg/kg 0.77 5K23041 11/23/05 11/24/05 EPA 8260B <br /> Benzene ND 0.0038 <br /> tert-Butyl alcohol ND 0.015 <br /> Di-isopropyl ether ND 0.0038 <br /> 1,2-Dibromoethane(EDB) ND 0.0038 <br /> 1,2-Dichloroethane ND 0.0038 " <br /> Ethanol ND 0.077 <br /> Ethyl tert-butyl ether ND 0.0038 <br /> Ethylbenzene ND 0.0038 <br /> Methyl tert-butyl ether ND 0.0038 <br /> Toluene ND 0.0038 <br /> Xylenes(total) ND 0.0038 <br /> Gasoline Range Organics(C4-C 12) ND 0.077 <br /> Surrogate: 1„2-Dichloroethane-d4 90% 60-125 <br /> it <br /> I r <br /> f <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 6 of 12 <br /> f <br />