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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9zi-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 /> acne Tech Services Project Shell(]) 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 Thie Reported 5/6/99 <br /> Sample Description- MW11 <br /> Laboratory Sample Number L904208-15 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result units Notes` <br /> Sequoia Ana"cal-San Carlos <br /> Total Pur eable Hydrocarbons C6-C12 BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9040111 4/22199 4122199 500 ND ug/l <br /> Benzene " " IF0 500 ND " <br /> Toluene IF 11 0 500 ND IF <br /> Ethylbenzene it0 500 ND " <br /> Xylenes(total) IF0 500 ND <br /> Methyl tert-butyl ether IF <br /> 5 00 ND _ <br /> Surrogate a,a,a-Trifluorotoluene 700-130 113 <br /> I <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A <br /> Ethanol 9040107 4/21/99 4/21/99 3000 ND ug/l <br /> Tert-butyl alcohol IF <br /> 200 ND " <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 2 00 ND " <br /> yl tert-butyl ether IF <br /> 200 ND " <br /> -amyl methyl ether " " " 200 ND --- <br /> -Surrogate 1,2-Dichloroethane-d4 IF760-114 113 <br /> uoia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 16 of 32 <br />