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1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> FAX mIW Analytical wwseq(650)232-9612612 <br /> www sequoialabs com <br /> r <br /> ttler-Ryan/Geostrategies(1) Protect Tosco(1) <br /> 47Sierra Court,Suite J Project Number Tosco#01205(Circle K),Lathrop Reported <br /> 'n <br /> Dublin CA,94568 Project Manager Deanna Harding 05/13/02 09 26 <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-6(L204130-07)Water Sampled 04/29/02 15 20 Received 04/29/02 17 20 <br /> Purgeable Hydrocarbons as Gasoline 580 200 ug/l 4 2050018 05/09/02 05/09/02 EPA 8021B P-01 <br /> Benzene 86 2 0 " <br /> Toluene 18 2 0 " <br /> Ethylbenzene 22 2 0 " <br /> Xylenes(total) 68 2 0 " <br /> Methyl tert-butyl ether 390 20 " <br /> Surrogate a,a,a-Trlfluorotoluene 93 1 % 70-130 " <br /> MW-7(L204130-08)Water Sampled 04/29/02 14 50 Received 04/29/02 17 20 <br /> Purgeable Hydrocarbons as Gasoline 28000 10000 ug/l 200 2050018 05/09/02 05/10/02 EPA 80218 P-02 <br /> Benzene ND 100 " <br /> Toluene 1100 100 " <br /> Ethylbenzene ]Soo 100 " <br /> Xylenes(total) 6900 100 " <br /> Methyl tert-butyl ether ND 1000 " <br /> Fo8 <br /> gate a,a,a-Trifluorotoluene 811 % 70-130 <br /> (L204130-09)Water Sampled 04/29/02 10 45 Received 04/29/02 17 20 - <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/i 1 2050019 05/09/02 05/09/02 EPA 8021E <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-Trtfluorotoluene 869% 70-130 " <br /> Iw is Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 14 <br />