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8 19 <br /> Ave Ste 8 <br /> Sequoia Sacramento,rCA95834 <br /> Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> www sequoialabs corn <br /> Gettler-Ryan-Dublin Project Unocal 5098Stockton,CA <br /> , <br /> 6747 Sierra Court, Ste J S210010 <br /> Project Number N/A Reported <br /> m CA,94568 Project Manager Deanna L Harding .} 10/14/02 18 46 <br /> GasolinelBTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-255 5210010-34 Water Sampled 09/23/02 16 00 Received 09/26/02 18 35 <br /> rt-butyl alcohol 37 50 ug/1 1 2100085 10/05/02 10/05/02 EPA 8260B <br /> ethyl tert-butyl ether 077 050 " <br /> Di-isopropyl ether ND 050 <br /> IIy]tert-butyl ether ND 050 <br /> rl-arnyl methyl ether ND 050 <br /> 42-Dichloroethane 14 050 <br /> t-D,bTomoethane(EDB) ND 050 <br /> nxene 45 050 „ <br /> ylbanzene ND 050 " <br /> „ <br /> Toluene 2 5 050 <br /> flenes(total) 120 050 <br /> rogate <br /> Toluene-d8 113 % 60-140 " <br /> Surrogate 4-BFB 112% 60-140 „ <br /> rugate 1,2-DCA-d4 110% 60-140 <br /> -27 5210010-35 Water Sampled 09/22/02 11 52 Received 09/26/02 18 35 <br /> Tert-butyl alcohol ND 5 0 ug/l 1 2100066 10/03/02 10/04/02 EPA 8260B <br /> tert-butyl ether 20 050 « <br /> ftopyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 „ <br /> -amyl methyl ether ND 050 <br /> iDichloroethane ND 050 <br /> I, -Dibromoethane(EDB) ND 050 „ <br /> 3enzene 26 050 „ <br /> sylbenzene 13 050 <br /> uene 28 050 <br /> xylenes(total) 47 050 <br /> agate Toluene-d8 110% 60-140 <br /> agate 4-BFB 111 % 60-140 „ <br /> urrogate 1,2-DCA-d4 101 % 60440 <br /> d <br /> ola Analytical -Sacramento The results in thrs repol t 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 enter ety <br /> Page 26 of 119 <br />