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819 Striker Ave Ste 8 <br /> ka�_ Sequoia Sacramento CA 95834 <br /> (916)92; 9600 <br /> A naivtical FAX(916)921-0100 <br /> www sequmalabs cam <br /> ettler-Ryan-Dublin Project Former Unocal 5098,Stockton, CA S308091 <br /> 747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L, Harding 08/20/03 16 56 <br /> GasolineTTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> alyte Result Limit units Dilution Batch Prepared Analyzed Method Notes <br /> MW-18(S308091-21)Water Sampled 08/04/03 12 55 Received 08/05/03 17 35 <br /> 058 050 ug/l 1 3080141 08/12/03 08/13/03 EPA 8260E <br /> t,zene <br /> ND 050 <br /> ylbenzene ND 050 <br /> Xvlenes(total) 057 050 " <br /> U09yl tert-butyl ether ND 2 0 0 " <br /> ate 1,2-DCA-d4 106% 60-140 <br /> Surrogate Toluene-& 103% 60-140 <br /> Uogate 4-BFB 103% 60-14018D(S308091-22)Water Sampled 08/04/03 12 15 Received 08/05/03 17 35 <br /> Jjnzenc ND 050 ug/1 1 3080141 08/12/03 08/13/03 EPA 8260B <br /> Dene ND 050 <br /> ylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> lidiglOktert-butyl ether ND 2 Q " <br /> ate 1,2-DCA-d4 104% 60-140 <br /> Surrogate Toluene-d8 105% 60-140 <br /> F <br /> ogate 4-BFB 99% 60-140 <br /> -19S(5308091-23) Water Sampled 08/04/03 13 15 Received 08/05/03 17 35 <br /> Benzene ND 050 ug/1 1 3080141 08/12/03 08/13/03 EPA 8260B <br /> ly'lenes <br /> uene ND 050 <br /> ylbenzene ND 050 <br /> (total) ND 050 <br /> Aethyl tent-butyl ether ND 2 0 <br /> rogate 1,2-DCA-d4 108% 60-140 <br /> rogate Toluene-d8 98010 60-140 " <br /> tut rogate 4-BFB 107 vaa 60-140For <br /> Analytical - Sacramento The results in this i eport apply to the samples analyzed in accordance with the chain of <br /> custody document Unless other wise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced to its entirety <br /> Page 17 of 117 <br />