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12) Sequoia los, A 94070 Road <br /> San Carlos, CA 94070-41 ]I <br /> Analytical (650) 232-9600 <br /> FAX(650) 232-9612 <br /> 'Maine Tech Services Project Shell(1) Sampled 4/15/99 <br /> 1680 Rogers Avenue Project Number Shell 2575 Country Club Blvd,Stockton Received 4/16/99 <br /> San Jose,CA 95112 Project Manager Fran Thee Reported 5/6/99 <br /> Sample Description MW2 <br /> Laboratory Sample Number L904208-17 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pureeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9040111 4/22/99 4/22/99 500 NO ug/1 <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene It0 500 ND " <br /> Xylenes(total) 11 0 500 ND " <br /> Methyl tert-butyl ether 9040121 4/24/99 4/24/99 50 886 " <br /> Surrogate a,a,a-Trrfluorotoluene 9040111 4/22/99 4/22/99 700-130 107 % <br /> Volatile Organic Oxygenated Corni3ounds by EPA Method 8260A <br /> Ethanol 9040114 4/22/99 4/22/99 20000 ND ug/1 <br /> Tert-butyl alcohol 1330 ND " <br /> Methyl tert-butyl ether 13 3 1230 " <br /> Di-isopropyl ether 13 3 ND " <br /> yl tert-butyl ether 13 3 ND " <br /> -amyl methyl ether 13 3 ND " <br /> arrogate 1,1-Dzch1oroethane-d4 760-114 113 % <br /> uo►a Analytical- San Carlos *Refer to end of report for text of notes and defrnitrons <br /> Page 18 of 32 <br />