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a— ) (98 t 9 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> Analytical FAX <br /> 16)921 9640 <br /> (916)921-0100 <br /> www sequolalabs com <br /> • <br /> SECOR International-Rancho Cordova Project TOSCO 11I93,Stockton,CA 5306625 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/03 13 044 <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 /> MW-9(5306625-09RE1)Water Sampled 06/27/03 16 05 Received 06/30/03 12 20 <br /> Methyl tert-butyl ether 710 20 ugll 10 3070157 07/11/03 07/11/03 EPA 8260E <br /> Surrogate Toluene-d8 89% 60-140 " 11 11 <br /> Surrogate 4-BFB 92% 60-140 " 11 or 11 <br /> MW-10(S306625-10)Water Sampled 06/27/03 10 45 Received 06/30/03 12 20 <br /> Benzene ND 050 ug/] 1 3070157 07/11/03 07/11/03 EPA 8260B <br /> Toluene ND 050 " ^ <br /> EthyIbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 ^ <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 84% 60-140 " <br /> Surrogate 4-BFB 90% 60-140 <br /> AMVV-1(5306625-11)Water Sampled 06/27/03 14 05 Received 06/30/03 12 20 <br /> enzene ND 10 ugll 20 3070157 07/11/03 .07111/03 EPA 8260B <br /> Toluene ND 10 <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 10 ^ <br /> Methyl tert-butyl ether 380 40 <br /> Gasoline(C6-C10) ND 1000 " <br /> Surrogate Toluene-d8 85% 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 /> of custody document Unless otherwise stated,results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 7 of 18 <br />