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i <br /> 819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br />,!INFAX 100 <br /> 1 www www Analytical (916192isequoiala6scom com <br /> -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-Methylpentane to 1,2,4-Trimethylbenzene) 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-12 5302221-13 Water Sampled 02/06/03 16 10 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons 810 250 ugA 5 3020205 02/18/03 02/18/03 EPA 8015/8021 <br /> Benzene <br /> 34 2 5 <br /> Toluene ND 2 5 <br /> Ethylbenzene ND 2 5 <br /> Xylenes 50 25{total) „ <br /> Methyl tert-butyl ether 27 10 <br /> Surrogate a,a,a-Trifluorotoluene 95 % 60-140 " <br /> U-13 S302221-14 Water Sampled 02/06103 16 35 Received 02/07/03 10.30 <br /> Purgeable Hydrocarbons 720 250 ugA 5 3020205 02/18/03 02/18/03 EPA 8015/8021 <br /> 2 5 " <br /> Benzene 260 „ <br /> Toluene 61 2 5 <br /> Ethylbenzene ND 2 5 <br /> Xylenes(total) 77 25 <br /> Melbyl tert-butyl ether ND 10 " <br /> ate a,a,a-Trefluorotoluene 89% 60-140 <br /> 11-14 5302221-15 Water Sampled 02/06/03 09 00 Received- 02/07/03 10 30 <br /> Purgeable Hydrocarbons ND 50 ugll 1 3020205 02/14/03 02/15/03 EPA 8015/8021 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 <br /> 0 50 " <br /> Xylenes(total) ND <br /> Methyl tert-butyl ether ND 2 0 <br /> Surrogate a,a,a-Trifluorotoluene 87% 60-140 <br /> oia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custodv document Unless otherwise stated results are reported on a wet weight bases <br /> This analytical report must be reproduced in its entirety <br /> Page 8 of 33 <br />