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1551 Industrial Road <br /> Sequoia san Carlos,CA 94070-4111 <br /> ,! 4 (650) 232-9600 <br /> Z) Analytical - FAX(650) 232-9612 <br /> Ow <br /> Gettler-Ryan/Geostrateves Prosect Tosco Sampled. 4/10100 <br /> 6747 Sierra Court,Suite D Project Number Unocal SS#1205 Received. 4/10/00 <br /> Dublin,CA 94568 Meet Manager Deanna Hardmg Reported 4124/00 <br /> Sample Description: MW-1 <br /> Laboratory Sample Number: L004097-02 <br /> Batch Date Date Specific Method/ Rgxwbng <br /> LAn!h2Number Prepared Analyzed Surrogate Limits Lumt Result Units Notes* <br /> Seauois Analytical-San Carlon <br /> Total PuMeable Mdrocarbons(C6-C12),BTEX and MTBE by DHS LUFI' <br /> Purgeable Hydrocarbons as Gasoline 0040087 4118100 4/I8/00 10000 45604 ug/1 1 <br /> Benzene " 100 ND " <br /> Toluene " " " 100 1570 " <br /> Ethylbenzene " 100 2660 " <br /> Xylenes(total) 100 15000 " <br /> Methyl tert-butyl ether 1000 ND " <br /> Surrogate a,aa-Tnfluorotoluene " 700-130 984 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Ethanol 0040056 4/12/00 4112/00 20000 ND 119/1 <br /> Di-isopropyl ether " Of <br /> 400 NDgftl " <br /> tertbutyl ether It It400 ND " <br /> yl tert-butyl ether " it 400 186 It <br /> Tert-amyl methyl ether 400 ND " <br /> Tert-butyl alcohol 2000 ND " <br /> Surrogate 1,2 Dichloroethane-d4 " 760-114 980 <br />• <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of now and definitions <br /> Page 3 of 11 <br />