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819 Sinker Ave Ste 8 <br /> 95834 <br /> Y'f � Sacramento, 92 -960 <br /> Sequoia (916)92i-9600 <br /> Analytical ww scq 6) labs2 1 co 0 <br /> www sequoialabs com <br /> 3eyan-Dublin Project Former Unocal 0187,Stockton,CA 5302221 <br /> Reported <br /> 5747 Sierra Court,Ste J Project Number N/A <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Wlyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> J-18 S302221-19 Water Sampled 02/06/03 17 10 Received 02/07/03 10 30 <br />'urgeable Hydrocarbons ND SO ug/1 1 3020205 02/14/03 02/15/03 EPA 8015/8021 <br /> lenzene ND 050 " <br />"oluene ND 050 <br />;thylbenzene ND 050 „ <br />(ylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 88% 60-140 " <br /> U-19 5302221-20 Water Sam led 02/06/0317 45 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3020205 02/14/03 02/15/03 EPA 8015/8021 <br /> Benzene 0 57 0 50 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 „ <br /> Meth 1 tett-butyl ether ND 2 0 ' <br /> Suare a,a,a-Trifluorotoluene 83% 60-140 <br /> U-20 5302221-21 Water Sampled 02/05/03 10 00 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons 150 50 ug/l 1 3020205 02/18/03 02/18/03 EPA 8015/8021 <br /> 0 50 " <br /> Benzene 24 <br /> 0 50 <br /> Toluene ND „ <br /> 0 50 " <br /> Ethylbenzene ND <br /> 0 50 " <br /> Xylenes(total) 1 2 <br /> " <br /> Methyl tent-butyl ether 33 20 " <br /> Surrogate a,a,a-Trifluorotoluene 87% 60-140 " <br /> is 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 10 of 33 <br />