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• 1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> � Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> Www sequoialabs Com " <br /> Gettler-Ryan/Geostrategies(I) Project Tosco(I <br /> 6747 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-4 L203104-04 Water Sampled 03/20/02 16-08 Received 03/21/02 18 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2030088 03/29/02 03/29/02 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 100% 70-130 " <br /> MW-5(L203104-05)Water Sampled 03/20/02 I5 10 Received 03/21/02 18 40 -_-- <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2030088 03/29/02 03/30/02 EPA 8021 B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 105% 70-130 " <br /> MW-6(L203104-06)Water Sampled 03/20/02 12 45 Received 03/21/02 18 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2030088 03/29/02 03/30/02 EPA 8021 B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 109% 70-130 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 20 <br />