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Sequoia 1551 sRoad <br /> San Carlos CA 94070 <br /> 41) <br /> Analytical (650)232 9600 <br /> FAX(550)232 9612VQV 4 <br /> www sequoialabs corn <br /> Gettler-Ryan/Geostrateales(I) Project Tosco(1) <br /> 6747 Sierra Court,Suite l Project Number Unocal S5#08671, Stockton,CA Reported <br /> Dublin CA,94568 Protect Manager Deanna Harding 02/2$/02 11 11 <br /> I <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-6(L202080-07)Water Sampled 02/12/02 15 55 Received 02/13/02 07 35 _ <br /> Purgeable Hydrocarbons(C6-C12) ND - 50 ugll 1 2B20001 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Benzene ND-0 50— <br /> " - --"- "-- —"--- --"-- <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 Q-28a <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether(MTBE) ND 25 Q-28b <br /> Surrogate a a a-Trilluorotoluene 115% 70-130 " <br /> MW-7(L202080-08)Water Sampled 02/12/02 14 40 Received 02/13/02 07 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l 1 2B20001 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene - ND 0 50 Q-28a <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether(MTBE) ND 25 Q- <br /> 0 <br /> Surrogate a a a-Trifluorotoluene 130% 70-130 " <br /> Sequoia Analytical -San Carlos The i esults in this i epos t apply to the samples analyzed in accordance with the c <br /> of custody document This analytical i epor 1 must be reproduced in its entirety <br /> Page 7 of 16 <br />