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4D (631551 Indusinal Road <br /> Sequoia San Carlos CA94o7o <br /> Analytical FAX <br /> 0)232 9602 <br /> (650)232 9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(I) Project Unocal(4) <br /> 6747 Sierra Court, Suite J Project Number Former Unocal##5098&Montgmery Ward Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/26/02 12 44 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result - Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-27(1-203015-36)Water Sampled 03/05/02 08 58 Received 03/05/02 18 25 T ' <br /> Benzene ND 20 ug/1 1 2030017 03/08/02 03/12/02 EPA 8260B <br /> Bromobenzene - ND 20 - <br /> Bromochloromethane ND 20 <br /> Bromodichloromethane ND 20 <br /> Bromoform ND 20 " <br /> Bromomethane ND so " <br /> n-Butylbenzene ND 20 <br /> sec-Butylbenzene ND 20 " <br /> Tert-butylbenzene ND 20 " <br /> Carbon tetrachloride ND 20 <br /> Chlorobenzene ND 20 " <br /> Chloroethane ND 50 <br /> Chloroform - ND - 20 <br /> Chloromethane ND 50 <br /> 2-Chlorotoluene ND 20 " <br /> 4-Chlorotoluene ND 20 " <br /> Dibromochlorom ethane ND 20 " <br /> 1,2-Dibromoethane ND 20 <br /> Dibromomethane ND 20 <br /> 1,2-Dibromo-3-chloropropane ND 50 <br /> 1,2-Dichlorobenzene ND 20 <br /> �1;3=Dichlorobenzene — ND 2 - <br /> 1,4-Dichlorobenzene ND 20 " <br /> --DichloTodifluoromet}iane � NDT- <br /> ],1-Dichloroethane ND 20 <br /> 1,2-Dichloroethane - --- - - - =- -ND - 20 <br /> _- <br /> 1,1-Dichloroethene ND 20 <br /> cis-1,2-Dichloroethene ND 20 <br /> -- trans-1,2-Dichloroethene "" -------'ND -"20 <br /> 1,2-Dichloropropane ND 20 <br /> 1,3-Dichloropropane ND 20 <br /> 2,2-Dichloropropane y ND 20 <br /> i,1-Dichloropropene ND 20 <br /> Ethylbenzene ND 20 <br /> Hexachlorobutadiene ND 20 <br /> Isopropylbenzene ND 20 <br /> p-Isopropyltoluene ND 20 <br /> Methylene chloride ND 50 <br /> Naphthalene- - - -- - -- - ND - <br /> n-Propylbenzene ND 20 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entireop <br /> Page 67 of 91 ' <br />