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819 Striker Ave Ste B <br /> Sequoia Sacramento,CA 956.4 <br /> Analytical FAX <br /> 41) (916)921 9600 <br /> (9!6)921-0 i oQ <br /> www sequoialabs cam ' <br /> Gettler-Ryan-Dublin Project Unocal 5098, Stockton,CA S210010 <br /> 6747 Sierra Court, Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> Gasollne\BTEXIQxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3 S210010-04 Water Sampled 09/24/02 13 10 Received 09/26/0218 35 r <br /> 'Pert-butyl alcohol 70 50 ue 10 2100085 10/05/02 10/06/02 EPA 8260B <br /> Methyl tert-butyl ether ND 50 <br /> Di-isopropyl ether ND 50 <br /> Ethyl tert-butyl ether ND 50 <br /> Tert-amyl methyl ether ND 50 " ^ <br /> I,2-Dichloroethane ND 50 <br /> 1,2-Dibromoethane(EDB) ND 50 <br /> Ethylbenzene 800 50 " <br /> Toluene 1400 50 <br /> Xylenes(total) 3300 50 i <br /> Sur rogate Toluene-d8 105% 60-140 <br /> Stu rogate 4-BFB 78% 60-140 <br /> Surrogate 1,2-DCA-d4 102% 60-140 <br /> MW-3 (521-0010-04RE1) Water Sampled_ 09/24/02 13 10 Received 09/26/02 38 35 _ <br /> Benzene 600 50 ug/l 100 2100111 10/08/02 10/08/02 EPA 8260B <br /> Sur?ogate Toluene-d8 113% 60-140 <br /> Su?rogate 4-BFB 108% 60-140 <br /> Surrogate 1,2-DCA-d4 114% 60-140 <br /> MW-4(S210010-05)Water SarnRled 09/241021850 Received 09/26/02 18 35 <br /> 'Pert-butt'!alcohol - - - - -19- ------, 5 0—ug/1 1 2100088--10105102 10/06/02 EPA 8260B--— -- <br /> Methyl tent-butyl ether is 050 " <br /> Di-isopropyl ether ND---- 0 50 " <br /> Ethyl tert-butyl ether_ ND 0 50 <br /> `Pert-amyl methyl ether ---- - =---T ND 050 -- <br /> 1,2-Dichloroethane 1 4 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Benzene 180 050 <br /> Ethylbenzene 30 050 ^ ' <br /> Toluene 19 050 ^ <br /> Xylenes(total) 76 050 QB-01 <br /> Sur?agate Toluene-d8 110% 60-140 " ^ <br /> Surrogate 4-BFB 108% 60-140 <br /> Surrogate 1,2-DCA-d4 110% 60-140 " ^ <br /> i <br /> Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the charn 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 11 of l 19 ' <br />