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819 Striker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (g16)921-9600 <br /> 1WAnalytical FAX(9 16)921-0 100 <br /> WWW sequoialabs corn <br /> -Ryan-Dublin Project Former Unocal 5098,Stockton,CA S302592 <br /> Sierra Court,Ste 3 Project Number N/A Reported <br /> ubltn CA,94568 Project Manager Deanna L Harding 03/10/03 17 17 <br /> Gaso11ne1BTEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Resuit Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> W-215 S302592-24 Water -Sampled 02/21/03 08 20 Received 02/24/03 15 30 <br /> Benzene ND 050 ug/1 1 3030088 03/06/03 03/06/03 EPA 8260B <br /> tyluene ND 050 <br /> hylbenzene ND 050 <br /> lenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Irrogate 1,2-DCA-d4 122 % 60-140 " <br /> rrogate Toluene-d8 114% 60-140 <br /> Surrogate 4-BFB 100% 60-140 <br /> EW-21D 5302592-25 Water Sampled 02/21/03 08 50 Received 02/24/03 15 30 <br /> enzene ND 050 ug/I 1 3030088 03/06/03 03/06/03 EPA 8260B <br /> Toluene ND 050 <br /> ahylbenzene ND 050 <br /> ]enes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> to 1,2-DCA-d4 119% 60-140 " <br /> ate Toluene-d8 113 % 60-140 " <br /> Surrogate 4-BFB 102 % 60-140 <br /> MW-22S(5302592-26)Water Sampled 02/21/03 09 30 Received 02/24/03 15 30 <br /> Benzene ND 050 ug/l 1 3030088 03/06/03 03/06/03 EPA 8260B <br /> Toluene ND 050 " <br /> thylbenzene ND 050 <br /> ylenes(total) ND 050 <br /> ethyl tert-butyl ether ND 20 <br /> rogate 1,2-DCA-d4 109% 60-140 " <br /> frrogale <br /> rogate Toluene-d8 113 % 60-140 <br /> 4-BFB 98% 60-140 " <br />�1 <br /> SIWa Analytical - Sacramento The results in this repoi t apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise staled results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 17 of 126 <br />