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1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> 4D <br /> mW Analytical 329600 <br /> PAX(650)232-9612 <br /> www sequoiaequoialabs coin <br /> Der-Ryan/Geostrategies(l) Project Tosco(1) <br /> Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/07/02 12 56 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-16(L203104-13)Water Sampled 03/20/02 12 00 Received 03/21/02 18 40 <br /> Purgeable Hydrocarbons as Gasoline 1800 500 ug/l 10 2040002 04/01/02 04/01/02 EPA 8021E P-01 <br /> Benzene 230 5 0 " <br /> Toluene ND 5 0 " <br /> Ethylbenzene 45 5 0 " <br /> Xylenes(total) 67 5 0 " <br /> Methyl tert-butyl ether 230 50 " <br /> Surrogate a,a,a-Tri luorotoluene 782% 70-130 " <br /> VW-1 L203104-14 Water Sampled 03/20/02 14 10 Received 03/21/02 18 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I I 2040002 04/01/02 04/01/02 EPA 80218 <br /> Benzene <br /> ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> V-3 <br /> ate a a,a-Trifluorotoluene 871 % 70-130 " <br /> L203104-15 Water Sampled 03/20/02 15 40 Received 03/21/02 18 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2040003 04/01/02 04/01/02 EPA 8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 50 " <br /> Surrogate a,a,a-Trifluorotoluene 987% 70-130 " <br /> The results in this report apply to the sam les analyzed in accordance with the chain o <br /> to Analytical-San Carlos P PPY P YZ f <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 6 of 20 <br />