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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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> � Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> �„ <br /> 1551 Industrial Road San Carlos, CA 94070 41 1 1 (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 lose,CA 95I 12 Project Manager Fran Thte Reported 5/6199 <br /> Sample Description Mw3 <br /> Laboratory Sample Number L904208-13 <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 Pur eable Hydrocarbons C6-41712 BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9040122 4/24/99 4/24/99 500 ND ug/l <br /> Benzene " „ 0 500 ND " <br /> Toluene „ 0 500 ND " <br /> Ethylbenzene It0 500 ND " <br /> Xylenes(total) It0 500 ND " <br /> Methyl tert-butyl ether 500 18.3 " <br /> Surrogate a,a a-Trifluorotoluene 700-130 114 % <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A <br /> Ethanol 9040101 4121199 4/21/99 3000 ND ug/l <br /> Tert-butyl alcohol 200 ND " <br /> Methyl tert-butyl ether 2 00 22 0 " <br /> Di-isopropyl ether 2 00 ND <br /> yi tert-butyl ether " " 200 ND " <br /> -amyl methyl ether 2 QO NO " <br /> urrogate 1 2-Drchloroethane-d4 760-114 113 % <br /> Amok <br /> uoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 14 of 32 <br />