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Sequoia 1551 Industrial Road <br /> San Carlos CA 94070 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 , <br /> www.scquoialabs.com <br /> Gettler-Ryan/Geostrategies(I) Project: Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number: Tosco#11195 Reported: .. <br /> Dublin CA,94568 Project Manager; Deanna Harding 02/21/02 08:17 <br /> Total Purgeable Hydrocarbons (C6-C22),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(L202058-01)Water Sampled: 02/07/02 00:00 Received:02/07/02 18:35 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ugA 1 2B18003 02/18/02 02/18/02 EPA <br /> 8015M/8021 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " " " <br /> Xylenes(total) ND 0.50 " PP <br /> " <br /> Methyl tert-butyl ether(MTBE) ND 2.5 " P. <br /> " <br /> Surrokate:a,a.a-Tri/luorotoluene 110% 70-130 <br /> MWA (L202058-02)WaterSampled: 02/07/0215:50 Received:02107/0218:35 <br /> Purgeable Hydrocarbons(C6-C12) ND 500 ugA 10 2B18003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Benzene ND 5.0 <br /> Toluene ND 5.0 <br /> Ethylbenzene ND 5.0 " '+ <br /> Xylenes(total) ND 5.0 <br /> Methyl tert-butyl ether(MTBE) 2400 25 <br /> Surrogate:a,a,a-Trifluorotoluene 105% 70-130 " ++ <br /> MW-2 (L202058-03)Water Sampled:02/07/02 15:15 Received:02/07/02 18:35 <br /> Purgeable Hydrocarbons(C6-C12) ND 500 ugA 10 21318003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Benzene ND 5.0 " " " " " It <br /> Toluene ND 5.0 " +' <br /> Ethylbenzene ND 5.0 +' <br /> Xylenes(total) ND 5.0 " It " <br /> Methyl tert-butyl ether(MTBE) 560 25 P, " <br /> Surrosate:a,a,a-Trifluorotoluene 98% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> i <br /> I <br /> Page 6 of 17 <br />