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1551 Industrial Road <br /> a Sequoia San Carlos,CA94070 <br /> (650)232-9600 <br /> Analytical www se(650) <br /> com <br /> ler-Ryan/Geostrategles(I Project Unoca](4) L208033 <br /> Sierra Court. Suite J Project Number Former Unocal 40187 Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Total Purgeable Hydrocarbons (C6-00) 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-18 L208033-19 Water Sampled 08/13/02 12 45 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) 62 50 ug/I 1 2H2O041 08/20/02 08/21/02 8015Bm/8021B <br /> Benzene l l 050 <br /> Toluene 2 1 0 50 " ^ <br /> Ethylbenzene ND 050 ^ <br /> xylenes(total) 060 0 50 <br /> Nlethyl tert-butyl ether 18 25 " ^ <br /> Surrogate a,a a-Tris luoroioluene 119% 70-130 " <br /> U-19(L208033-20)Water Sampled 08/13/021420 Received 08/14/021955 <br /> Gasoline Range Organics(C6-C70) 210 50 ugll I 2H21004 08/21/02 08/21/02 8015Bm/802]B HC-21 <br /> Benzene 32 0 50 ^ ^ <br /> Toluene 4 6 050 ^ ^ <br /> Ethylbenzene l 7 050 <br /> xylenes(total) 1 4 050 <br /> Methyl tert-butyl ether 67 25 " <br /> 0(gate a,a,a-Triuorotoluene 124% 70430 " <br /> L208033-21)Water Sampled 08/13/021330 Received_ 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) 52 50 ug/l I 2H21003 08/21/02 08/21/02 8015Bm/8021B HC-12 <br /> Benzene 1.3 050 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether 4 5 2 5 <br /> Surrogate a,a,a-Tri luorotoluene 136% 70-130 S-02 <br /> la Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its emirery <br /> Page 18 of 36 <br />