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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 /> a- )„V Analytical 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 /> 'Tffarae Tech Services Project Shell(1) Sampled 4115199 <br /> 1680 Rogers Avenue Project Number Shell 2575 Country Club Blvd, Stockton Received 4/16/99 <br /> San Jose,CA 951 l2 Project Manager Fran Thie Reported 516/99 <br /> Sample Description: MW8 <br /> Laboratory Sample Number L904208-19 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result Units Nates* <br /> -i <br /> Sequoia Analytical-San Carlos <br /> Total Purg`eable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9040111 4/22/99 4/22/99 2500 5650 ug/l 2 <br /> Benzene 1. <br /> " " 250 705 " <br /> Toluene to 11 11 25 0 860 " <br /> Ethylbenzene 10 '1 250 68 5 " <br /> Xylenes(total) " 250 585 " <br /> Methyl tert-butyl ether It <br /> 250 9850 <br /> Surrogate a,a a-Tr:fluorotoluene 700-130 119 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A <br /> Ethanol 9040114 4122/99 4122/99 300000 ND ug/l <br /> Tert-butyl alcohol 20000 ND " <br /> Methyl tert-butyl ether 200 11600 " <br /> Di-isopropyl ether 200 ND " <br /> yl tert-butyl ether 200 ND " <br /> t-amyl methyl ether to to 200 214 It <br />-uurrogate 1 2-Drchloroethane-d4 760-114 113 % <br /> nota Analytical- San Carlos *Refer to end of report for text of notes and defanttrons <br /> Page 20 of 32 <br />