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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> ,!D (916)921-9600 <br /> v4Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA S302221 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <br /> Gasoline (2-Metbylpentane to 1,2,4-Trimetbylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U_-15(5302221-16)Water Sampled 02/06/03 08 30 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons ND s 50.-. ug/1 - 1 3020205 02/14/03 t 02/15/03 EPA 8015!8021 " <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-bury]ether ND 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 90% 60-140 " <br /> U-16(S302221-17)Water Sampled 02/04/03 15 25 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons 82 _ 50 ug/I 1 3020224 02/18/03 02/18/03 EPA 8015/8021 <br /> Benzene ND 0 50 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 0 90 0 50 " <br /> -Methyl tert-butyl ether - - - 4 2 2 0 <br /> Surrogate a a a-Trtfluorotoluene 100% 60-140 <br /> U-17(S302221-18)Water Sampled 02/04/03 14 55 Received 02/07/0310 30 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3020224 02/18/03 02!18103 EPA 8015/8021 <br /> Benzene ND 050 " <br /> w Toluene- 50— <br /> Ethylbenzene ND 050 " <br />----Xylenes(total)_ — — ND�0 50____ <br /> -- ----------- --------- - - ------ ---- - -- <br /> Methyl tert-butyl ether ND 2 0 <br /> Surrogate a,a a-TrtflrAorotoluene -� - -----85% ' - " 60=140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain o <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 9 of 33 <br />