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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95634 <br /> (9 16)921 9600 <br /> Analytical <br /> FAX(91 b)921 0100 <br /> Ift IW www sequomlabs coin <br /> Gettler-Ryan-Petaluma Project Tosco 6981, Stockton,CA 5302524 <br /> 1364 N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 03/07/03 16 58 <br /> GasolmelBTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-7 5302524-01 Water Sampled 02/21/03 10 18 Received 02/21/03 14 50 <br /> Benzene 55 5 0 ugll 10 3030052 03/06/03 03/06/03 EPA 8260E <br /> Toluene 110 5 0 <br /> Ethylbenzene 52 5 0 " <br /> Xylenes(total) 1300 5 0 " <br /> Methyl tert-butyl ether ND 20 " <br /> Gasoline(C6-C10) 6200 500 <br /> Surrogate Toluene-d8 116% 60-140 " <br /> Surrogate 4-BFB 111% 60-140 " <br /> MW-16 5302524-02 Water Sampled 02/21/03 10 25 Received 02/21/03 14 50 <br /> Benzene 12 0 50 ug/1 1 3030052 03/06/03 03/06/03 EPA 8260B <br /> Toluene ND 050 " <br /> Ethylbenzene 1 7 050 " <br /> Xylenes(total) 2 9 050 <br /> Methyl tert-butyl ether 36 2 0JOW <br /> inline(C6-C10) ND 50 <br /> urrogate Toluene-d8 110% 60-140 <br /> Surrogate 4-BFB 107% 60-140 <br /> quota 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 entirety <br /> Page 3 of 6 <br />