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1551 industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> FAX�► 12 <br /> Analytical wwsegt0ialabs om <br /> www sequocalabs coin <br /> ler-Ryan/Geostrategtes(1) Project Unoca](4) <br /> Sierra Court,Suite J 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-3(L202097-13)Water Sampled 02/16/02 08 30 Received 02117/0211 00 - <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 2020071 02/21/02 02/21/02 EPA 8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 50 " <br /> Surrogate a,a,a-Trifluorotoluene 773% 70-130 " <br /> MW-10(L202097-14)Water Sampled 02/16/02 1350 Received-02/17/02 11 00 <br /> Purgeable Hydrocarbons as Gasoline I10000 50000 ug/l 1000 2020070 02/21/02 02/21/02 EPA 8021B P-02 <br /> Benzene 3400 500 " <br /> Toluene 20000 500 <br /> Ethylbenzene 3600 500 " <br /> Xylenes(total) 25000 500 <br /> Methyl tert-butyl ether ND 5000 " <br /> W12 <br /> te a,a,a-Trifluorotoluene 959% 70-130 " <br /> (L202097-15)Water Sampled 02/16/02 12 50 Received-02/17/02 11 00 <br /> Purgeable Hydrocarbons as Gasoline 48000 10000 ugll 200 2020070 02/21/02 02/22/02 EPA 8021B P-02 <br /> Benzene 780 100 " <br /> Toluene 660 100 " <br /> Ethylbenzene 2900 100 " <br /> Xylenes(total) 14000 100 <br /> Methyl tert-butyl ether ND 1000 " <br /> Surrogate a,a,a-Tnfluorotoluene 924% 70-130 " <br /> SIWa 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 6 of 18 <br />