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1551 industrial Road <br /> San Carlos,CA 94070-4111 <br /> Sequoia (650)232-9600 <br /> FAX(650)232-%12 <br /> Analytical www sequoialabs corn <br /> Zisettler-Ryan/Geostrategzes(1) Project. Tosco(5) Sampled 7/5/00 <br /> 5747 Sierra Court,Suite 3 Project Number Unocal Circle K SS#1205 Received 7/5100 <br /> Dublin,CA 94568 Project Manager Deanna H211inA Eseorted 7/18/00 <br /> Sample Description MW 3 <br /> Laboratory Sample Number: L007040-04 <br /> Batch Date Date Specific Method/ Reporting <br />,final Number P ared Anal Surrogate Limits Linut Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pureeable Hydrocarbons(C6-C12),BTEX and MTBE by DRS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0070052 7/13/00 7/13/00 500 3640 ug/1 1 <br /> Benzene '+ 5 00 21.9 " <br /> Toluene 500 ND " <br /> Ethylbenzene " TV 500° 7.1 it <br /> Xylenes(total) 500 NIT <br /> Methyl tert bu l ether " Soo ND D to <br /> Surrogate a,a,a-Tnfluor+otoluene " 700-130 lib <br /> Volatile Organic Oxvizenated Compounds by EPA Method 8260A <br /> Tert-butyl alcohol 0070036 7/12/00 7/12100 1000 ND 119/1 <br /> Methyl tent-butyl ether " " 20 0 ND " <br /> Di-isopropyl eer 20 0 ND <br /> th " <br /> E -butyl Cher n " �+ 200 ND " <br /> T 1 methyl ether If <br /> " 200 ND <br /> Surrogate 1,2-Dzch1,oroethane-d4 AV of 760-114 102 <br /> 0— <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definmons <br /> ,per Page 5 of 10 <br />