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/�j1 <br /> Sequoia 1551 Carlos, <br /> A Road <br /> ''.�_''���"" uoia Stan Car1�,CA 94070 <br /> (650)232-96 <br /> ilko Analytical FAX(550)232-961212 <br /> www sequoialabs com <br /> tiler-Ryan/Geostrategies(1) Project Unoca](4) L208033 <br /> 7 Sierra Court,Suite J Project Number Former Unocal 40187, Stockton Reported <br /> ublin CA 94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Total Purgeab)e Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-12(L208033-13)Water Sampled 08/1.4102 14 55 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) 650 50 ug/I 1 2H21002 08/21/02 08122/02 8015Bm/8021B HC-21 <br /> Benzene 54 050 ^ ^ <br /> Toluene 2.3 050 " <br /> Ethylbenzene 21 050 <br /> Xylenes(total) 1 7 050 " ^ <br /> Methyl cert-butyl ether 8 9 25 <br /> Surrogate a,a,a-Trifluorotoluene 150% 70-130 S-02 <br /> U-13(L208033-4 Water _Sampled 08/14/02 15 35_Received 08/14/02 19 55 _ <br /> Gasoline Range Organics(C6-C10) ND 50 ug/I I 2H22003 08/22/02 08/22/02 8015Bm/8021B <br /> Benzene 75 050 ^ <br /> Toluene ND 050 " ^ <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl ten-butyl ether ND 2 5 <br /> agate aa a-Triuorotoluene 101 % 70-130 " <br /> L208033-15 Water Sampled 08/12/02 15 00 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/I 1 2H2O039 08/20/02 08/21/02 8015Bm/8021B <br /> Benzene ND 050 <br /> Toluene 13 050 " ^ <br /> Ethylbenzene ND 050 <br /> Xylenes(total) is 050 <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a,a,a-Triuorotoluene 108% 70-130 " <br /> Isoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stared results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 16 of 36 <br />