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Sequoia los. Industrial Read <br /> San Carlos,t:.n 9ao7o-41 t 1 <br /> 4 (650)232-9600 <br /> 4,,,� Analytical FAX`650'232-9612 <br /> www sequotalabs ootsr <br /> Gettler-RyanlGeosbutegies(1) Project. Tosco(5) Sampled. 6/26/00 <br /> 6747 Sierra Court,Suite J Project Number_ _Tosco(Unocal)SS#6981 Received. 612_7/00 <br /> Dublin,CA 94568 - - Proect M Deanna Hardin- --- - - 7/12/00 <br /> - - - - - - - — - - - - - - - - - -- - - - <br /> Sample Description: MW-15 - - - - -- - - ---- - - - - - ---- - ---- — --- <br /> Laboratory Sample Number: L006236-12 <br /> Batch Date Date Spomfic Method/ Reporting <br /> Anal Number PreparedAnal Surrogate Limits Unlit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total PuLrLeable Hydrocarbons(Q:C121 BTEX and MTBE by DHS LUFP <br /> Purgeable hydrocarbons as Gasoline 0070025 717100 717100 500 ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene " 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tent-butyl ether 5 00 7.26 <br /> Surrogate a,a,a-Tn luorotoluene " 700-130 108 % <br /> i <br /> Volatile Organic C2ML)ounds by EPA Method 8260A <br /> 1,2-Drbromoethane 0070031 717/00 717100 2 00 ND ug/l <br /> 1,2-Dichloroethane 2 00 3.57 " <br /> Dr-isopropyl ether " " " 2 00 ND '1 <br /> Ethyl teat butyl ether " 2 00 ND <br /> Methyl tert-butyl ether " 2 00 5.23 " <br /> Tert-amyl methyl ether " 2 00 ND " <br /> Tert-butyl alcohol 100 ND " <br /> Surrogate 1,2-Dichlomethane-d4 760-114 102 <br /> Surrogate Toluene-d8 " 880-110 968 " <br /> i <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor react of now and definitions <br /> Page 13 of 30 <br />