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885 Jarvis Dr <br /> a— —N Sequoia Mogan Hill,CA 95037 <br /> (408)776-9600 <br /> f Analytical <br /> FAX(408)782-6308 <br /> www sequotalabs coin <br /> URS Corporation[I] Project ARCO#4493,Stockton,Ca MLL0311 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number ARCO#4493,Stockton,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 12/26/02 14 17 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-11M(MLL0311-141 Water Sampled 12/05/02 10 40 Received 12/06/02 17 10 <br /> Ethanol ND 80 ug/1 2 2L19014 12/18/02 12/19/02 EPA 8260B <br /> tert-Butyl alcohol ND 40 " 0-11 <br /> Methyl tert-butyl ether 55 to " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> tert-Amyl methyl ether ND 1 0 " <br /> 1,2-Dichloroethane ND 10 <br /> 1,2-Dibromoethane(EDB) ND 10 <br /> Surrogate 1,2-Dichloroethane-d4 940% 78-129 " <br /> Benzene ND I0 2 <br /> Bromobenzene ND 10 " <br /> Bromochloromethane ND 10 " <br /> Bromodichloromethane ND 10 " <br /> Bromoform ND 10 " <br /> Bromomethane ND 20 " <br /> ,n-Butylbenzene ND 10 <br /> sec-Butylbenzene ND 1 0 <br /> tert-Butylbertzene ND 10 <br /> Carbon tetrachloride ND 1 0 <br /> Chlorobenzene ND I p <br /> Chloroethane ND 10 <br /> Chloroform ND 10 " <br /> Chloromethane ND 10 <br /> 2-Chlorotoluene ND 10 <br /> 4-Chlorotoluene ND 1 D " <br /> Dibromochloromethane ND I0 " <br /> 1,2-Dibromoethane(EDB) ND 10 <br /> Dibromomethane ND 1 p ^ " <br /> 1,2-Dibromo-3-chloropropane ND 20 <br /> 1,2-Dichlorobenzene ND 1 0 <br /> 1,3-Dichlorobenzene ND 10 " <br /> 1,4-Dichlorobenzene ND 10 <br /> Dichlorodifluoromethane ND 10 " <br /> 1,1-Dichloroethane ND 10 <br /> 1,2-Dichloroethane ND 10 <br /> 1,I-Dichloroethene ND 10 " <br /> cis-1,2-Dichloroethene 10 10 " <br /> trans-1,2-Dichloroethene ND 10 ^ <br /> 1,2-Dichloropropane ND 10 " <br /> 1,3-Dichloropropane ND 10 " <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 36 of 55 <br />