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819 <br /> Ste 8 <br /> Sequoia Sacramento <br /> CA 583 <br /> a— ) (916)921 900 <br /> Sacramento CA 95834 <br /> Analytical FAX(916)9210100 <br /> www sequoialabs coin <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA 5306625 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/03 I3 04 <br /> Gasohne\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3(5306625-03RE1)Water Sampled 06/27/03 14 30 Received 06/30/03 12 20 <br /> Methyl tert-butyl ether 760 40 ugll 20 3070157 07/11/03 07/11/03 EPA 8260B <br /> Surrogate Toluene-d8 81 % 60-140 " <br /> Surrogate 4-BFB 96% 60-140 " <br /> MW4(5306625-04)Water Sampled 06/27/03 13 02 Received 06/30/03 12 20 <br /> Benzene ND 0 50 ugfl 1 3070157 07/11/03 07/11/03 EPA 8260B <br /> Toluene ND 0 50 1. <br /> " 1 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 27 2 0 " <br /> Gasoline(C6-C10) ND 50 <br /> Surrogate Toluene-d8 82% 60-140 " <br /> Surrogate 4-BFB 91 % 60-140 " <br /> -5(5306625-05)Water Sampled 06/27/03 12 35 Received 06/30/03 12 20 <br /> 'Mffenzene ND 0 50 ug/l 1 3070157 07/11/03 07/11/03 EPA 8260E <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 1$ 2 0 " <br /> Gasoline(C6-C 10) ND 50 n 1. 11 " " <br /> Surrogate Toluene-d8 84% 60-140 " <br /> Surrogate 4-BFB 93% 60-140 " <br /> MW-6(5306625-06)Water Sampled 06/27/03 14 55 Received 06/30/03 12 20 <br /> Benzene ND 050 ugll 1 3070I57 07/11/03 07/11/03 EPA 8260B <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Gasoline(C6-CIO) 170 50 HC-19 <br /> Surrogate Toluene-d8 80% 60-140 " <br /> Surrogate 4-BFB 91 % 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 5 of 18 <br />