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1551 Industrial Road <br /> Sequoia Sen Carlos CA 94070 <br /> 4D (65G)232-9600 <br /> miW Analytical FAX(650)232-9612 <br /> www sequoialabs com <br /> iser-Ryan/Geostrategies(1) Project Unocal(4) <br /> Sierra Court,Suite 1 Project Number Former Unocal#2859,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/04/02 08 47 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (L202097-01)Water Sampled 02/15/02 16.10 Received 02/17/0211 00 <br /> Purgeable Hydrocarbons as Gasoline ND - 50 ugll 1 2020063 02/20/02 02/21/02 EPA 8021E <br /> Benzene ND 0 50 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 50 <br /> Surrogate a,a,a-Tri luorotoluene 900% 70-130 " <br /> MW4(L202097-02)Water Sampled 02/15/02 14 10 Received 02/17/02 11 00 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2020063 02/20/02 02/21/02 EPA 8021E <br /> Benzene ND 0 50 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 50 <br /> ate a,a,a-Triuorotoluene 897% 70-130 ^ <br /> M''5(L202097-03)Water Sampled_02/15/02 12 20 Received 02/17/02 11 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugfl 1 2020071 02/21/02 02/21/02 EPA 8021B <br /> Benzene ND 050 ^ <br /> Toluene ND 050 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 <br /> Surrogate a aa-Trifluorotoluene 859 % 70-130 " <br /> Slea Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 2 of 18 <br />