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404 N <br /> Sequoia Wigg�e <br /> Walnut Creek CA 94598 <br /> 4 <br /> (925)988-9600 <br /> %0- <br /> FAX FAX 988-9673 <br /> www sequoequowiabs ConnGettler Rvan, Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal# 2859 Reported <br /> Dublin CA 94568 Project Manager Scott Palston I0-Jul-01 11 20 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX in Air by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analvte Result Limit [hits Dilution Batch Prepared Analyzed Method Notes <br /> VE-2@1158(WI06451-01)Air Sampled 20-Jun-01 ill 58 Received 22-Jun-01 15 55 <br /> Purgeable Hydrocarbons NO 28 ppmv I l F22003 25-Jun-0I 25-Jul-01 DHS LUFr <br /> Benzene NO 0 016 " <br /> Toluene NO 0 013 " <br /> Ethylbenzene NO 0 012 " <br /> Xylenes(total) NO 0 012 " <br /> Methyi tert-butyl ether ND 0 14 " <br /> VE-19740(W1O6451-02)Air Sampled 21-Jun-01 07 40 Received 22-Jun-01 1555 <br /> Purgeable Hydrocarbons 69 2 8 ppmv 1 IF22003 25-Jun-01 25-Jul-OI DHS LUFT <br /> Benzene 2 2 0 016 " <br /> Toluene 18 0 013 " <br /> Ethylbenzene ND 0 012 " <br /> rIWylenes(total) 096 0 012 " <br /> Methyl tert-butyl ether NO 0 14 " <br /> EFFLUENT(W1O6451-03)Air Sampled 21-Jun-01 11 30 Received 22-Jun-01 15 55 <br /> Purgeable Hydrocarbons ND 2 8 ppmv l IF22003 25-Jun-01 25-Jul-01 DHS LUFT <br /> Benzene NO 0 016 " <br /> Toluene NO 0 013 " <br /> Ethylbenzene NO 0 012 " <br /> Xylenes(total) NO 0012 " <br /> Methyl tent-butyl ether NO 0 14 " <br /> VE-1@1140(WI06451-04)Air Sampled 21-Jun-01 11 40 Received 22-Jun-01 15 55 <br /> Purgeable Hydrocarbons 23 28 ppmv I IF22003 25-Jun-01 25-Jul-01 DHS LUFT <br /> Benzene 021 0 016 " <br /> Toluene 0 18 0 013 " <br /> Ethylbenzene 0 098 0 012 " <br /> Xylenes(total) 0 11 0 012 " <br /> Methyl tert-butyl ether NO 0 14 " <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4of8 <br />