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819 Striker Avenue Suite 8 <br /> 5834 <br /> Sequoia 916)921ento CA99600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs corn <br /> Gettler-Rvan-Dublin Project Unocal 2859 Stockton,CA <br /> 6747 Sierra Court Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager S Polston 07/03/01 16 34 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX in Air by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VE-I @ 1605(5106303-01)Air Sampled 06/18/01 16 05 Received 06/19/01 1202 <br /> Purgeable Hydrocarbons 22 28 ppmv 1 IFIS003 06/20/01 06/20/01 DHS LUFT <br /> Benzene 014 0 016 " <br /> Toluene 020 0 013 " <br /> Ethylbenzene 0 16 0 012 " <br /> Xylenes(total) 027 0 012 " <br /> Methyl tert-butvl ether ND 0 14 " <br /> VE-3 @ 737(5106303-02)Air Sampled 06/19/0107 37 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons ND 2 8 ppmv 1 IF15003 06/20/01 06/20/01 DHS LUFT <br /> Benzene ND 0 016 " <br /> Toluene ND 0 013 " <br /> ylbenzene ND 0 012 n <br /> lenes(total) 0 050 0 012 <br /> TvIethyl tert-butyl ether ND 014 " <br /> Effluent(S106303-03)Air Sampled 06/19/01 10 50 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons ND 2 8 ppmv i 1F15003 06/20/01 06/20/01 DHS LUFT <br /> Benzene ND 0 016 <br /> Toluene ND 0 013 " <br /> Ethylbenzene ND 0 012 <br /> Xylenes(total) 0 050 0 012 " <br /> Methyl tert-butyl ether ND 0 14 " <br /> VE-3 @(S106303-04)Air Sampled 06/19/01 10 54 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons 4 2 2 8 ppmv 1 1F15003 06/20/01 06/20/01 DHS LUFT <br /> Benzene ND 0 016 " <br /> Toluene ND 0 013 " <br /> Ethylbenzene ND 0 012 X " <br /> Xylenes(total) 0 058 0 012 " <br /> Methyl tent-butyl ether ND 0 14 " <br /> • <br /> Sequoia Analytical-Sacramento 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 4 of 8 <br />