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4D (651551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> Analytical FAX <br /> 0)232-9600 <br /> (650)232-9612 <br /> www.sequoialabs.com <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(I) :ffr S <br /> 6747 Sierra Court, Suite J Project Number: Tosco 411195,Lathrop,CA Reported: - <br /> Dublin CA,94568 Projecl Manager: Deanna Harding 12/10/01 19:11 <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 /> CC-WS(L111147-13)Water Sampled: 11/21/0113:45 Received: 11/21/0118:15 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 1120008 12104/01 12/04/01 EPA 8021B <br /> Benzene ND 0.50 <br /> Toluene Nb 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Methyl tert-butyl ether 5.1 5.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 88.2% 70-130 Fr <br /> Sequoia Analytical -San Carlos The results tit thrs report apply to the samples analyzed in accordance with the chain oj;= <br /> cuslody document. This analytical report must be reproduced in its entirety. <br /> Page 6 of 18 <br />