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1551 Industrial Road <br /> Sequoia San Xrlos CA 650)232-90600 <br /> FAx 1W Analytical70 <br /> ,!Z� WWW <br /> tahsco2 <br /> www sequoialabs com <br /> r-Ryan/Geostrategies(1) Protect Tosco(1) <br /> 6 7 Sierra Court, Suite J Project Number Tosco(farmer BP)#11192,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/01/02 13 39 <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-10 L202098-10 Water Sampled 02/1810211 40 Received 02/19/02 07 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2020063 02/20/02 02/21/02 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 877 % 70-130 " <br /> MW-11 L202098-11 Water Sampled 02/18/02 13 55 Received 02/19/02 07 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2020064 02/20/02 02/20/02 EPA 8021 B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 290 5 0 " <br /> ate a,a,a-Trifluorotoluene 104 % 70-130 " <br /> S to Analytical - San Carlos The)esulis in this repot apply to the samples analyzed in accordance with the chain a <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 14 <br />