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"" ' Sequoia 819 Striker Ave Ste 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921 0100 <br /> www sequoialabs com <br /> 6Gettler-Ryan-Dublin Project Unocal 5098,Stockton,CA S210010 <br /> 7 Sierra Court, Ste 7 Project Number N/A Reported <br /> lin CA, 94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> GasollneWEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> W-23D S210010-30 Water Sam led 09/23/02 10 40 Received 09/26/02 18 35 <br /> rl-butyl alcohol ND 50 ug/1 1 2100085 ]0/05142 10/05/02 EPA 8260B <br /> ethyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 <br />[byl tent-butyl ether ND 050 <br /> n-amyl methyl ether ND 050 „ <br /> 1,2-Dichloroethane ND 050 <br /> -Dibrornaethane(EDB) ND 050 <br /> nzene NO 050 <br /> thylbenzene ND 050 " <br /> iuene l 4 050 <br /> lenes(total) 1 1 050 <br /> rrogate Toluene-d8 107916 60-140 " <br /> Suri ogate 4-BFB 108% 60-140 <br /> Uagate 1,2-DC4-d4 110% 60-140 <br /> W-24D(S210010-31)'LA'ater Sampled 09/22/02 19 16 Received 09/26/02 18 35 <br /> ftTert-butyl alcohol ND 50 ug/l 1 2100066 10/03/02 10/04/02 EPA 8260B <br /> tent-butyl ether 13 050 <br /> ropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 „ <br /> t-amyl methyl ether ND 050 <br /> Dtchloroethane ND 050 <br /> -Dibromoethane, (EDB) ND 050 <br /> klniz,e <br /> ne 35 050ybenzene 20 050 <br /> uene 38 050 " <br /> Xylenes(total) 79 050 <br /> Irogate Toluene-d8 118% 60-140 " <br /> ogate 4-BFB I I 1 % 60-140 k <br /> Surrogate 1,1-DCA-d4 103 % 60-140 <br /> Via Analytical - Sacramento The i esults ar this i eporr apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are i eported on a wet weight basis <br /> This analpttcal report must be reproduced to its entirety <br /> Page 24 of 119 <br />