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• $19 Sinker Ave Ste <br /> 4DSequoia Sacramento,CA 9583Q4 <br /> Analytical FAX(916)921-9600 <br /> (916)921-0100 <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project TOSCO 11192,Stockton,CA 5211573 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/06/02 1134 <br /> Gasoline\BTEXIOxygerlates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7(S211573-07)Water Sampled 17/15/02 13 50 Received 11/18/02 16 45 R-05 <br /> Acetone i ND' 500 ugn 100 2110445 11/27/02 11/28/02 EPA 8260E <br /> 'Benzene ND 50 <br /> Toluene ND 50 " <br /> Ethylbenzene ND 50 " '+ <br /> Xylenes(total) ND 50 <br /> Methyl tert-butyl ether ND 200 ^ <br /> Gasoline(C6-C10) ND 5000 " ^ <br /> Surrogate Toluene-d8 109% 60-140 " <br /> Surrogate 4-BFB 11.5% 60-140 <br /> MW-8(S211573-08)Water Sampled 11/15/021020 Received 11/18/02 16 45 <br /> Benzene ND 050 ug/l 1 2110445 11/27/02 11/28/02 EPA 8260E <br /> Toluene 055 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 2 0 " <br /> Gasoline(C6-C10) ND 50 <br /> Surrogate Toluene-d8 108% 60-140 ^ <br /> Surrogate 4-BFB 121 % 60-140 ^ <br /> MW-9 S211573-09 Water Sampled 11/15/02 09 21 Received 11/18/02 16 45 <br /> Benzene ND 050 u8A 1 2110445 11/27/02 11/28/02 EPA 8260B <br /> Toluene 1.3 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(tgtal) 0.56 050 <br /> Methyl tert-butyl ether 14 2 0 <br /> Gasoline(C6-C 10) _ ND 50 " <br /> Surrogate Toluene-d8 109% 60-140 ^ " <br /> Surrogate 4-BFB 122% 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 entirety <br /> Page 5 of 16 <br />