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1551 Industrial Road <br /> ID <br /> Sequoia San Carlos CA 94070 <br /> 1wAnalytical (650)232-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> Gettler-Ryan/GeostrateRies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite J Project Number Former Unocal#2859,Stockton Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 03/04/02 0847 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reportmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-6(L202097-04)Water Sampled 02/15/02 16 45 Received 02/17/0211 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2020064 02/20/02 02/20/02 EPA 8021 B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 987% 70-130 <br /> MW-7(L202097-05)Water Sampled 02/15/02 10 40 Received 02/17/02 11 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2020064r 02/20/02 02/21/02 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trtfluorotoluene 969% 70-130 <br /> MW-8(L202097-06)Water Sampled 02/15/02 12 56 Received 02/17/02 11 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2020064 02/20/02 02/21/02 EPA 8021 B <br /> Benzene ND 0 50 <br /> Toluene ND 0 50 <br />-Ethylbenzene ND 0-50 <br /> Xylenes(total) ND 050 <br /> Methyl tent-butyl ether---- NDβ€” 5 0 ^ ---"-----" β€”"- - , ---- - ---- -- -- <br />_Surrogate a,a,a-Trtfluorotoluene=_ 970%_ β€”__70-130 __ __- <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain a <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 18 <br />