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(D (M)819 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> � Analytical <br /> 921-96o0 <br /> FAX(916)92 i-0100 <br /> www seilmialabs com <br /> Gettler-Ryan-Dublin Project TOSCO 11192,Stockton,CA S211573 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/06/02 15 34 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> _QA (5211573-01)Water Sampled 11/15/02 00 00 Received 11/18/021645 <br /> Benzene ND 050 ug/l 1 2110445 11/27/02 11/29/02 EPA 8260B <br /> Toluene a ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 ^ <br /> Methyl teri-butyl ether ND 2 0 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 108% 60-140 " <br /> Surrogate 4-BFB 120% 60-140 <br /> MW-1 (S211573-02)_Water Sampled 11/15/02 00 00 Received 11/18/02 16 45 R-05 <br /> Benzene ND 2 5 ug/1 5 2110445 11/27/02 11/28/02 EPA 8260B <br /> Toluene ND 2 5 ^ ^ <br /> Ethylbenzene ND 2 5 <br /> Xylenes(total) ND 2 5 <br /> Methyl tert-butyl ether ND 10 <br /> Gasoline(C6-C 10) ND 250 <br /> Surrogate Toluene-d8 i 171 % 60-140 ^ <br /> Surrogate 4-BFB 118% 60-140 " <br /> r W-3'(S211573-03)Water Sampled 11115/021423 Received 11/18/02 16 45 R-05 <br /> Acetone ND,' / 1200 - ugA - 250 2110445 11/27/02 11128/02 EPA 82608 <br /> Benzene ND 120 <br /> Toluene ND 120 " <br /> Ethylbenzene ND 120 <br /> Xylenes(total) ND 120 <br /> Methyl tent-butyl ether ND 500 <br /> Gasoline(C6-C 10) ND 12000 " <br /> Surrogate Toluene-d8 108% 60-140 <br /> Surrogate 4-BFB 117% 60-140 " <br /> 4 <br /> Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed to 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 3 of 16 <br />