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1551 Industrial Road <br /> Sequoia son Carlos, <br /> CA 94070-4111 <br /> (650)Z32-9600 <br /> FAX(650)232-961 Z <br /> Analytical www.sequolalabs.com <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 515100 <br /> 6747 Sierra Court,Suite D Project Number. Tosco(Unocal)SS#1 1195 Received: 515100 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported. 5/22100 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-San Carlos <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> TB-LB L005052-01 Water <br /> Purgeable Hydrocarbons as Gasoline 0050078 5117/00 5/17/00 50.0 ND u9/1 <br /> Benzene " „ " 0.500 ND It <br /> Toluene " " 0.500 ND It <br /> Ethylbenzene „ It 0.500 ND " <br /> Xylenes(total) " " „ 0.500 ND " <br /> Methyl tert-butyl ether +' " 5.00 ND " <br /> Surrogate: a,a,a-Trifluorotoluene " to 70.0-130 99.9 % <br /> MW-1 L005052-02 Water <br /> Purgeable Hydrocarbons as Gasoline 0050078 5117100 5/17100 50.0 ND ug/l <br /> Benzene " 0.500 ND <br /> Toluene 0.500 ND " <br /> Ethylbenzene " 0.500 ND „ <br /> .-T:''Mes(total) "' „ " 0.500 ND „ <br /> hyl tert-butyl ether 5118100 100 <br /> -Surrogate:�a,a,a-Trifluomtoluene " 5117100 70.0-130 111 <br /> MW-2 L005052-03 Water <br /> Purgeable Hydrocarbons as Gasoline 0050078 5117/00 5117/00 50.0 ND ug/l <br /> Benzene " " It 0.500 ND „ <br /> Toluene 0.500 ND " <br /> Ethylbenzene " 0.500 ND " <br /> Xylenes(total) " " " 0.500 ND " <br /> Methyl tert-butyl ether " 5.00 235 " <br /> Surrogate: a,a,a-Tris luorotoluene " " " 70.0-130 115 % <br /> MW-3 L005052-04 Water <br /> Purgeable Hydrocarbons as Gasoline 0050085 5118100 5119100 200 ND ug/l <br /> Benzene " 2.00 ND " <br /> Toluene 2.00 ND " <br /> Ethylbenzene " „ 2.00 ND " <br /> Xylenes(total) " it 2.00 ND " <br /> Methyl tert-butyl ether 5/17100 50.0 2480 1 <br /> Surrogate: a,a,a-Trifluorotoluene to " 5119100 70.0-130 100 % <br /> I <br /> i <br /> MW 4 L005052-05 Water <br /> Purgeable Hydrocarbons as Gasoline 0050085 5/18/00 5118100 50.0 ND ug/l <br /> Benzene " 0.500 ND <br /> Toluene „ 0.500 ND <br /> Ethylbenzene " 0.500 ND " <br /> 11Aenes(total) „ „ 0.500 ND <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notei and definitions. <br /> Page 2 of 13 <br />