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r <br /> Road <br /> Sequoia an Carlos <br /> 94070 <br /> 4D + San Carlos CA 941]70 <br /> r <br /> Analytical (650)232 9600 <br /> FAX(650)232 9612 <br /> www sequoialabs corn <br /> Gettler-Ryan/Geostratel7ie5(1) Project Tosco(l) <br /> 6747 Sierra Court, Suite j Project Number Unocal SS#08671,Stockton,CA Reported , <br /> Dublin CA,94568 Project Manager Deanna Harding 02/28/02 11 15 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> F Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(L202080-01)Water Sampled 02/12/02 0000 Received 02/13/02 07 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/1 1 2B20001 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Benzene ND—- 0 50— - _ -- --"-- - <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tcrt-butyl ether(MTBE) ND 2 5 Q-28 <br /> Surrogate a a a-Trilluorotoluene 140% 70-130 S-LIM <br /> MW-1 (L202080-02)Water Sampled 02/12/02 17 30 Received 02/13/02 07 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 200 ug/l 4 2B20001 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Benzene ND 2 0 " <br /> Toluene ND 2 0 " <br /> Ethylbenzene ND 2 0 " <br /> Xylenes(total) ND 2 0 <br /> Surragate a a a-Trihuorotoluene 121% 70-130 " <br /> MW-1 (L202080-02RE1)Water Sampled 02/12/02 17 30 Received 02/13/02 07 35_ <br /> Methyl tent-butyl ether(MTBE) 860 50 Ug/1 20 2B20001 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Surrogate a a a-Tri/luorotoluene 125% 70-130 " <br /> BMW-2(L202080-03)Watea�Sampled-02/12/02 16 55lWcesved-02/13/02 07 35__ <br /> Purgeable Hydrocarbons(C6-C12) _ ND _ 50 ug/1 _ - 1 2B20001 02/20/02 02/20/02 _ EPA <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> w Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether(MTBE) 98 25 " Q-28 <br /> Surrogate a,a,a-Trilluorololuene 113916 70-130 " <br /> Sequoia Analytical-San Carlos The i esults in this report apply to the samples analyzed in accordance with the c <br /> of custody document This analytical i epos t must be repi oduced in its entre ety <br /> Page 5 of 16 <br />