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Sequoia 1551 Industria[Road <br /> San Carlos CA 94070 <br /> r (650)232-9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> www.sequoialabs.com <br /> Gertler-Rvan/Geostrategies(1) Project: Tosco(1) f,} <br /> 6747 Sierra Court,Suite 7 Project Number: Tosco#11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna/-larding 02/21/02 08:17 <br /> Total Purgeable Hydrocarbons (C6-C12), 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 /> MW-5(L202058-06RE1)Water Sampled:02/07/02 16:20 Received: 02/07/02 18:35 <br /> Methyl tert-butyl ether(MTBE) 6200 5000 ug/l 2000 2B 18003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Surrogate:a,a,a-Trifluorotoluene 111 % 70-130 " <br /> MW-6 L202058-07 Water Sam led:02/07/02 74:10 Received: 02/07/02 18:35 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/1 1 2B18003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Benzene ND 0.50 " " " " " " <br /> Toluene ND 0.50 it <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether(MTBE) ND 2.5 <br /> Surrogate:a,a,a-Trifluorotoluene 100% 70-130 <br /> MW-8(L202058-08)Water Sampled:02/07/02 12:20 Received: 02/07/02 18:35 _ <br /> Purgeable Hydrocarbons(C6-Cl2) ND 50 ug/1 1 2B18003 02/19/02 02/19/02 EPA . <br /> 8015M18021 �rrJ1 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " " " " " It <br /> Surroi ate:a,a,a-Trifluorotoluene 104% 70-130 <br /> MW-8(L202058-08RE1)Water Sampled:02107/0212:20 Received:02/07/02 18:35_ <br /> Methyl tert-butyl ether(MTBE) 1200 120 ug/l 50 2B 18003 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Surrozate:a,a,a-Trifluorotoluene 102% 70-130 " <br /> MW-9(L202058-09)Water Sampled:02/07/02 11:40_ Received:02/07/02 18:35 _ <br /> Purgeable Hydrocarbons(C6-C]2) ND 50 ugR 1 2B18003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 It <br /> It <br /> " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Methyl tert-butyl ether(MTBE) ND 2.5 <br /> Surrogate:a,a,a-TriJluorotoluene 100% 70-130 " <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chK?::'r <br /> of custody docurnent. This analytical report must be reproduced in its entirety. <br /> Page 8 of 17 <br />