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1551 Industrial Road - <br /> Sequoia San Carlos CA 94070 <br /> v (650)232-9600 <br /> #w Analytical <br /> FAX(650)232-9612 <br /> www sequoialabs corn <br /> Gettler-Ryan/Geostrategies(l) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco(former BP)#I l 192,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/01/02 1111 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(L202098-01Water Sampled 02/18/02 00 00 Received 02/19/02 07 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/! 1 2020063 02/20/02 02/20/02 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 5 0 " + <br /> Surrogate a a a-Trifluorotoluene 779% 70-130 <br /> MW-1 (L202098-02)Water Sampled 02/18102 15 35 Received 02/19/02 07 40 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1. 2020063 02/20/02 .02/20102 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether 25 5 0 <br /> Surrogate a,a a-Trifluorotoluene 954% 70-130 <br /> MW-3(L202098-03)Water Sampled 02/18/02 17.35 Received 02/19/02 0_7_40 <br /> Purgeable Hydrocarbons as Gasoline 150 120 ug/1 2 5 2020064 02/20/02 02/20/02 EPA 8021B T P-01 <br /> Benzene 12 12 " '+ <br /> Toluene ND 12 <br /> Ethylbenzene ND 12 <br /> Xylenes(total) ND 12 <br /> Methyl tert-butyl ether 1600 100 20 " 02/20/02 " M-04 <br /> Surrogate a,a,a-Trifluorotoluene 111 % 70-130 01/20/02 <br /> Sequoia Analytical - San Carlos The i esults in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must bei eproduced in its entirety <br /> Page 2 of 14 <br />