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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento, <br /> 916)92 -9600 <br /> 95834 <br /> (416)921-9600 <br />,mw Analytical FAX(916)92"100 <br /> www sequoialabs cam <br /> Ryan-Dublin Project TOSCO 11192,Stockton,CA 5211573 <br /> 6 tetra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/06/02 15 34 <br /> GasolineNBTEXNOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-4 5211573-04 Water Sampled 11/15/02 13 10 Received 11/18/02 16 45 <br /> Benzene ND 050 ug/1 I 2110445 11/27/02 11/28102 EPA 8260B <br /> Toluene 067 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(10181) 064 050 " <br /> Methyl tert-butyl ether 150 2 0 , E <br /> Gasoline(C6-CIO) l50 50 " HC-19 <br /> Surrogate Toluene-d8 ' 10791a 60-140 " <br /> Surrogate 4-BFB 124% 60-140 " <br /> MW-5 S211573-05 Water Sampled 11/15/02 12 39 Received 11/18/02 16 45 <br /> Benzene ND 0 50 ug/1 1 2110445 11/27/02 11/28/02 EPA 8260B <br /> Toluene 1 1 050 " <br /> Ethylbenzene ND 050 1. " " <br /> Xylenes(total) 065 050 " <br /> Methyl tert-butyl ether 3 4 20 <br /> GIM&ne(C6-C10) ND 50 <br /> S ate Toluene-d8 109% 60-140 " <br /> Surrogate 4-BFB 122% 60-140 " <br /> MW-6(S211573-06)Water Sampled 11/15/021052 Received 11/18/02 16 45 <br /> Benzene ND 0 50 ug11 1 2110445 11/27/02 11/28/02 EPA 8260B <br /> Toluene 1 6 0 50 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 10 050 <br /> Methyl ter(-butyl ether 95 20 <br /> Gasoline(C6-C10) 96 50 " HC-19 <br /> Surrogate Toluene-d8 108% 60-140 <br /> Surrogate 4-BFB 122% 60-140 " <br /> to 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 rn its entirety <br /> Page 4 of 16 <br />