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Sequoia 919 Striker Ave Ste 8 <br /> Sacramento CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)92 1-0100 <br /> www sequoialabs corn <br />'647 <br /> l S1Ryan-Dublin Project Unocal 5098, Stockton,CA <br /> Sierra Court,Ste { Projecr Number NIA 5210010 <br /> hn CA,94568 Reported <br /> Project Manager Deanna L Harding 10/14/02 18 46 <br /> GasohneWEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> 117W-18D 5210010-22 Water <br /> Sampled 09/23/02 14 05 Received 09/26/02 18 35 RT-04 <br /> ert-butyl alcohol ND 50 ug/l 1 2100111 10/08/02 10/08/02 EPA 8260E <br /> ethyl ten-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 <br /> „ <br /> hyl ten-butyl ether ND 050 <br /> rt-amyl methyl ether ND 050 <br /> „ <br /> 1,2-Dichloroethane I 1 050 " <br /> -Dibromoethane(ED13) ND 050 <br /> nzene ND 050 <br /> hylbenzene ND 050 " <br /> Toluene ND 050 " <br /> ,1 <br /> lines(total) ND 0 50 <br /> rrogate Toluene-d8 112 0 60-140 <br /> Surrogate 4-BFB 113 % 60-140 <br /> L-1 <br /> ogate 1,2-DCA-d4 122916 60-140 <br /> 95 5210010-23 Water Sampled 09/23/02 13 00 Received 09/26/02 18 35 <br /> soTert-butyl alcohol ND 5 0 ugA 1 2100085 10/05/02 10/05/02 EPA 8260B <br /> tert-butyl ether ND 050 „ <br /> -ropy] ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br />(-amyl methyl ether ND 050 <br /> Dichloroethane ND 050 <br /> , " <br /> 11 „ <br /> Dibromoethane(EDB) ND 050 „ <br /> 11 <br /> Benzene 054 050 <br /> ylbenzene 5 5 050 „ <br /> uene ND „ <br /> 0 50 ” ,1 <br /> Xylenes(total) 25 050 „ <br /> Irogate Toluene-d8 114% <br /> 60-140 „ <br /> rogate 4-BFB 110% 60-140 <br /> surrogate 12-DCA-d4 116% 60-140 <br /> oia Analytical- Sacratnento The results in this report apply to the samples analyzed in accordance with the chain 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 20 of 119 <br />