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819 Striker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> Analytical FAX <br /> 41) (916)92€ 9600 <br /> (9€6)921-p€00 <br /> www sequoialab$com <br /> Gettler-Ryan-Dublin Project Unocal 5098, Stockton, CA S210010 <br /> 6747 Sierra Court, Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L }larding 10/14/02 1846 <br /> GasolineWEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units - Dilution Batch Prepared Analyzed Method Notes <br /> � - <br /> MW-14(S210010-16)Water Sampled 09/24/02 16_47 Received 09/26/02 18 35 <br /> Tert-butyl alcohol ND 50 ug/I 1 210011 1 10/08/02 10/08/02 EPA 8 <br /> _ 2608 <br /> Methyl tert-butyl ether - ND 050 " " " " <br /> 11 <br /> Di-isopropyl ether ND 0 50 <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane 055 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Benzene 11 0 5 " <br /> Ethylbenzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) 6 2 050 <br /> Surrogate Toluene-d8 111 % 60-140 <br /> Surrogate 4-BFB - 110% 60-140 <br /> Surrogate 1,2-DCA-d4 124 % 60-140 " <br /> MW-14A (S210010-17)Water Sampled 09/24/02 17 27 Received 09/26/02 18 35 _ <br /> Tert-butyl alcohol 56 5 0 ug/1 1 2100111 10/08/02 10/08/02 EPA 826013 <br /> Methyl tent-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " <br /> =1=2--Dichloroethane 0 92 —0 - <br /> 1,2-Di romoet ane(EDB) ND 050 <br /> "Benzene — � �- _ � � 3 <br /> T <br /> Ethylbenzene ND 0 50 " <br /> Toluene T_ 18 0-50 <br /> Xylenes(total) 86 050 <br /> Sut rogate Toluene-d8 113 % 60-140 " <br /> 111 %--- y60-140� '• •' -,• <br /> Surrogate 1 2-DCA-d4 127% 60-140 " <br /> Sequoia Analytical- Sacramento The results in this repoi t apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated i esults are reported on a wet weight basis <br /> This analytical t eport must be reproduced in its entirety , <br /> Page 17 of 119 ' <br />