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Sequoia <br />� Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-41 1 1 <br />(650) 232-9600 <br />FAX (650) 232 9612 <br />www sequo,alabs com <br />Gettler-Ryan/Geostrategies(1) <br />Project <br />Chevron(1) <br />Sampled <br />6/22/00 <br />6747 Sierra Court, Suite I <br />Project Number <br />Chevron 9-5775 <br />Received <br />6/23/00 <br />DublinCA 94568 <br />Project Manager <br />Scott Polston <br />Reported <br />6/28/00 <br />Sample Description <br />EX -1 <br />Laboratory Sample Number <br />L006183-01 <br />Batch Date <br />Date Specific Method/ <br />Reporting <br />Analyte <br />Number Prepared <br />Analyzed Surrogate Limits <br />Limit <br />Result <br />Units <br />Sequoia Analytical - San Carlos <br />Total Pur¢eable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT <br />Purgeable Hydrocarbons as Gasoline <br />0060112 6/26/00 <br />6/26/00 <br />12500 <br />31000 <br />ug/1 <br />Benzene <br />125 <br />15600 <br />" <br />Toluene <br />125 <br />ND <br />" <br />Ethylbenzene <br />125 <br />518 <br />" <br />Xylenes (total) <br />125 <br />176 <br />" <br />Surrogate a a a-Trrfluorotoluene <br />600-140 <br />107 <br />% <br />Volatile Oranntc Oxygenated Compounds by EPA Method 8260A <br />Tert-butyl alcohol <br />100000 <br />ND <br />" <br />Methyl tert-butyl ether <br />6/27/00 <br />2000 <br />320000 <br />" <br />Di -isopropyl ether <br />6/26/00 <br />2000 <br />ND <br />" <br />Ethyl tent -butyl ether <br />2000 <br />7800 <br />" <br />Tert-amyl methyl ether <br />2000 <br />2900 <br />" <br />Surrogate 12-Dichloroethane-d4 <br />760-114 <br />106 <br />% <br />Notes* <br />n <br />2 <br />Sequoia Analytical - San Carlos *Refer to end of report for text of notes and definite <br />Page 2 of 5 <br />