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Sequoia 1551 Industrial Road <br /> Sao Carlos CA 94070 <br /> (650)232-9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> www.sequoislabs.com <br /> < settler-Rvan/Geostrategies(1) Project: Tosco(1) <br /> ='5747 Sierra Court,Suite] Project Number: Tosco#11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 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 Motes <br /> MW-3 (L202058-04)Water Sampled: 02/07/02 16:50 Received: 02/07/02 18:35 <br /> Purgeable Hydrocarbons(C6-C12) ND 1000 ugA 20 2B18003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Benzene ND 10 " <br /> Toluene ND 10 <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 10 <br /> Methyl tert-butyl ether(MTBE) 5200 50 <br /> Surrogate:a,a,a-Trifluorotoluene 98% 70-130 to " <br /> MW-4 (L202058-05)Water -Sampled:02/07/02 14:45 Received: 02/07/0218:35 _ <br /> Purgeable Hydrocarbons(C6-C12) 130 50 ugll 1 21318003 02/19/02 02/19/02 EPA <br /> 8015M/8021 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> ._ '.71lenes(total) ND 0.50 <br /> ,-,-=,-ethyl tert-butyl ether(MTBE) 200 2.5 " <br /> Surrogate:a,a.a-Trifluorotoluene 122% 70-130 " +' <br /> MW-5(L202058-06)Water_Sampled:02/07/02 16:20 Received: 02/07/02 18:35 <br /> Purgeable Hydrocarbons(C6-C12) ND 500 ugll 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 /> Surrogate:a,a,a-Trifluorotoluene 112% 70-130 <br /> I <br /> i <br /> s <br /> I <br /> f <br /> E <br /> s <br /> G <br /> i <br /> 4 <br /> I <br /> <'oia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> f <br /> t <br /> F <br /> Page 7 of 17 F <br />