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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) Analytical 819 5triker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070 4111 (650) 232 9600 FAX(650)232-9612 <br /> ISan <br /> tne Tech Services Project Shell(1) Sampled 4/15/99 <br /> 0 Rogers Avenue Project Number Shell 2575 CountryClub Blvd,Stockton Received 4116199 <br /> .lose, CA 95112 Project Manager Fran Mie Reported 5!6/99 <br /> Sample Description MW9 <br /> Laboratory Sample Number- L904208-09 <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 Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9040106 4/21/99 4/21/99 500 ND ug/l <br /> Benzene 0 500 ND IF <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) it It <br /> " 0 500 ND IF <br /> Methyl tent-butyl ether it " " 5 00 ND " <br /> Surrogate a a a-Tri luorotoluene If <br /> " 700-130 78 2 % <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A <br /> Ethanol 9040101 4/21199 4/21/99 3000 ND ug/l <br /> Tert-butyl alcohol it " 11 200 ND " <br /> Methyl tert-butyl ether IF <br /> 2 00 ND IF <br /> Di-isopropyl ether 200 ND 11 <br /> yI tert-butyl ether IF " 2 00 ND IF <br /> methyl ether It <br /> " 200 ND <br /> Surrogate 1,2-Dichloroethane-d4 760-114 109 % <br /> uoia Analytical-San Carlos *Refer to end of reportfor text of notes and definitions <br /> Page 10 of 32 <br />