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Industrial Road <br /> + Sequoia Sanan C Carlos,CA 94070 <br /> Analytical (650)2329600 <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> er-Ryan/Geostrategtes(1) Project Unocal(4) L208029 <br /> Sierra Court Suite J Project Number Former Unocal#12859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Total Purgeable Hydrocarbons (C6--C]0) 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 /> MW-16(L208029-16)Water Sampled 08/10/0212 15 Received 08/11/02 11 30 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/I ] 2H22004 08/22/02 08/23/02 8015Bm/802]B <br /> Benzene ND 0 50 <br /> Toluene 22 0 50 <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) 24 0 50 <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate aa o-Trifluorotoluene 924% 70-130 " <br /> ]%IW-17(L208029-17)Water Sampled 08/09/02 14 50 Received 08/11/02 11 30 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/1 l 2H22001 08/22/02 08/23/02 8015Bm/8021 B <br /> Benzene ND 0 50 " " " <br /> Toluene ND 0 50 " " <br /> Ethylbenzene ND 0 50 It " <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 25 " <br /> Wate a,a,o-Tr�uorotoluene 899% 70-130 <br /> l► -18(L208029-18)Water Sampled 08/0910214 18 Received 08/11/02 11 30 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l l 21-122001 08/22/02 08/23/02 8015Bm/8021B <br /> Benzene ND 050 It <br /> " " <br /> Toluene ND 050 " " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Triuorotoluene 802% 70-130 " <br /> is Analytical- San Carlos The results in this report apply to the samples analysed 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 entirety <br /> Page 12 of 25 <br />