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'. DSequoia San Carl s�CA9 070 <br /> (650)232-9600 <br /> i1W Analytical FAX(650)232-9612 <br /> www sequoialabs com <br /> er-Ryan/Geostrategies(1) Project Unoca](4) L208033 <br /> Sierra Court- Suite J Project Number Fortner Unocal 40187 Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Total Purgeable 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-24 L208033-25 Water Sampled 08/13/02 09 33 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) ND 50 ugJ] I 2H21002 08/21/02 08/22/02 8015Bm/8021B <br /> Benzene ND 0 50 " <br /> Toluene 0 93 0 50 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) 13 050 <br /> Methyl tent-butyl ether ND 2 5 " <br /> Surrogate a,a,a-Triuorotoluene 968% 70-130 " <br /> U-25(L208033-26)Water Sampled 08/13/02 10 18 Received 08/14/02 19 55 _ <br /> Gasoline Range Organics(C6-C10) ND 50 ug/I 1 2H21003 08/21/02 08/21/02 8015Bm/802]B <br /> Benzene 1 1 050 " <br /> Toluene 086 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) 14 050 <br /> Methyl tert-butyl ether ND 2 5 ~ ^ <br /> -*ale a,a,a-Trtfluorotoluene 117% 70-130 " <br /> U-26(L208033-27)Water Sampled 08/14/02 13 32 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-CIO) 66 50 ug/l 1 21126003 08/26/02 08/26/02 8015Bm/8021B HC-12 <br /> Benzene 13 0 50 " <br /> Toluene 2.3 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) 29 050 " <br /> Methyl tent-butyl ether ND 2 5 <br /> Surrogate a,a,a-Triuorotoluene 993 % 70-130 " <br /> to Analytical - San Carlos The results in this report apply to the samples analyzed to 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 enirrety <br /> Page 20 of 36 <br />