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1551 Industrial Road <br /> Sequoia San Carlos 94070 <br /> FAX CA <br /> (654)232-9600 <br /> 32-9600 <br /> 0)232-9612 <br /> Analytical �ww.sequoialabs.com <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court.Suite 3 Project Number: UNOCAL SS#11195.LATHROP,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 08/28/01 07:22 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Balch Prepared Analyzed Method Notes <br /> CC-WS(L]08074-13)Waler Sampled:_08/10/01 0:30 Received: 0811010118:55 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 1080107 08/24/01 08/24/01 DHS LUFT <br /> Benzene ND 0.50 " <br /> Toluene 0.86 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) 0.76 0.50 <br /> 117ethyl tert-butyl ether 94 5.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 98.7% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain yi <br /> custody document. This analytical report must be reproduced in its entirety. - <br /> Page 6 of 22 <br />