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C 1551 Carlos <br /> Industrial Road <br /> +� Sequoia sanC(650)329600 <br /> (650 232 9600 <br /> FAX Analytical www <br /> labsco32 2 <br /> www sequoi slabs com <br /> r-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number Tosco(Unocal)SS46981,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 09/27/01 10 19 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE by EPA 802113 <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> _MW-11 (L109080-10)Water Sampled 09/12/01 12 45 Received 09/13/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1090095 09/24/01 09/25/01 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene 49 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 5 0 <br /> Surrogate a,a a-Trifluorotoluene 111 % 70-130 " <br /> MW-14(L]09080-17)Water Sampled 09112101 12 45 Received 09/73/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1090095 09/24/01 09/25/01 DHS LUFT <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> NJlWl tent-butyl ether 55 5 0 " <br /> ate a a,a-Trifluorotoluene 110% 70-130 " <br /> MW-15(L109080-12)Water Sampled 09/12/011205 Received 09113101 19 30 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugA 1 1090095 09/24/01 09/25/01 DHS LUFT <br /> Benzene ND 050 " " " <br /> Toluene ND 0 50 h 1. " " <br /> Ethylbenzene ND 050 " " " N <br /> Xylenes(total) ND 0 50 n " <br /> Methyl tert-butyl ether 22 5 0 " <br /> Surrogate a,a a-Trrlluorotoluene 112% 70-130 " <br /> oia 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 5 of 21 <br />