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r <br /> .......----- - - --- - <br /> Sl9 Striker Ave Ste 8 <br /> Sequoia Sacram(916) A95834 <br /> 9600 <br /> �-���' q (916)921-9600 <br /> -0 100 <br /> Analytical ww.FAX e9uaialu16) s.com <br /> www sequoia la 6s.com <br /> :;"jettler-Ryan Petaluma Tosco 11195,Lathrop,CA 5303557 <br /> 1364 N McDowell Blvd.Ste B2 Project Number. NIA Reported: <br /> Petaluma CA,94954 Project Manager: Dave Vossler 04/04/03 18:44 <br /> GasolinelBTEXIOxygenates by EPA method 8260E <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilation Balch Prepared Analyzed Method Notes <br /> MW-3(5303557-01)Water Sampled: 03/21/03 11.18 Received:03/21/03 14:20 <br /> Benzene ND 0.50 ug/l 1 3040041 04/02/03 04102!03 EPA 8260E <br /> Toluene 0.60 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Gasoline(C6-C10) 320 50 HC-19 <br /> Surrogate:1,2-DCA-d4 106% 60-140 " <br /> Surrogate:Toluene-d8 101 % 60-140 <br /> Surrogate:4-BFB 97% 60-140 " <br /> MW-3 5303557-01RE1 Water Sampled:0312110311:18 Received:0312110314:20 <br /> Methyl tent-butyl ether 1700 10 ug/l 20 3040041 04/04/03 04/04/03 EPA 9260B <br /> Surrogate:1,2-DCA-d4 125% 60-140 <br /> Surrogate:Toluene-d8 100% 60-140 <br /> Surrogate:4-BFB 100% 60-140 <br /> MW 10(5303557-02)Water Sampled:0312110311.35 Received:03/21/03 14:20 <br /> '. 3nzene ND 0.50 ug/I 1 3040041 04/02/03 04/03/03 EPA 8260B <br /> luene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 <br /> Methyl tert-butyl ether 5.1 0.50 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate:1,2-DCA-d4 127% 60-140 <br /> Surrogate:Toluene-d8 100% 60-140 <br /> Surrogate:4-BFB 96% 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in 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 entirely. <br /> Page 3 of 7 <br />