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819 Sinker Ave Sic S <br /> Sequoia Sacramllt%CA 5834 <br /> 9 6)921998600 <br /> Analytical FAX(916)921-WOO <br /> www sequoielabscom com <br /> Gettler-Ryan-Dublin Project TOSCO 11192,Stockton,CA S305429 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 05/29/03 17 15 <br /> Gasoiine\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> QA (S305429-01)Water Sampled 05/14/03 00 00 Received 05115103 16 40 <br /> Benzene ND 0 50 ug/l 1 3050437 05/27/03 05/27/03 EPA 8260E <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 107% 60-140 " <br /> Surrogate 4-BFB 103% 60-140 " <br /> MW-1 (S305429-02)Water Sampled 05/14/03 16 55 Received-05/15/03 16 40 <br /> Benzene ND 050 ug/l 1 3050466 05/28/03 05/28/03 EPA 82608 <br /> Toluene - ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Gasoline(C6-C10) ND 50 - <br /> Surrogate Toluene-d8 118% 60-140 <br /> Surrogate 4-BFB 97% 60-140 " <br /> MW-3 5305429-03 Water Sampled 05/14/03 14 25 Received 05/15/0316 40 R-05 <br /> Benzene ND 50 ug/l 100 3050475 05/27/03 05/28/03 EPA 8260E <br /> Toluene ND 50 " <br /> Ethylbenzene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Methyl tert-butyl ether ND 200 " <br /> Gasoline(C6-C10) ND 5000 " <br /> Surrogate Toluene-d8 104% 60-140 " <br /> Surrogate 4-BFB 92% 60-140 " <br /> Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain <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 3 of 23 <br />