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404 N Wiget Lane <br /> Sequoia Walnut C(9251 CA 94598 <br /> -9600 <br /> FAX(925)988-9673 <br /> Analytical www sequotalabs tom <br /> Gettler Rvan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal 4 2859 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 29-Jun-01 09 15 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VE-1�a)0855(W106339-01)Air Sampled 18-Jun-01 08 55 Received 18Jun-01 17 30 <br /> L. <br /> Purgeable Hvdrocarbons 700 50 mg/ml Air l 1 F15003 I8-Jun-01 I8-Jun-01 DHS LUFT P-03 <br /> Benzene 4 6 050 CC-3 <br /> Toluene 4 9 0 50 " <br /> Ethylbenzene 3 8 050 " <br /> Xylenes(total) 2 1 050 <br /> Methvl tert-butvl ether ND 2 5 <br /> Surrogate a a a-Trifluororoluene 178% 70-130 " S-04 <br /> VE-l(a�1247(W106339-02)Air Sampled 18Jun-01 12 47 Received 18-Jun-01 1730 <br /> Purgeable Hvdrocarbons 450 100 m&rn'Air 2 IF15003 18-Jun-01 20-Jun-01 DHS LUFT P-03 <br /> Benzene 2 8 1 0 CC-3 <br /> Toluene 3 6 1 0 " <br /> methylbenzene 3 6 1 0 <br /> Xylenes(total) 5 4 1 0 <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Tnfluorotoluene 112% 70-130 " <br /> EFFLUENT(W106339-03)Air Sampled 18Jun-01 12 43 Received I"un-01 17 30 <br /> Purgeable Hvdrocarbons ND 10 mg/m'Air 02 1F15003 19-Jun-01 19-Jun-01 DHS LUFT <br /> Benzene 013 010 CC-3 <br /> Toluene ND 010 " <br /> Ethvlbenzene ND 0 10 " <br /> Xylenes(total) ND 0 10 " <br /> Methvl tert-butvl ether ND 050 " <br /> Surrogate a a a-Trtfluorotoluene 867% 70-130 " <br /> Sequoia Analvocal-Walnut Creek The results in this report apply to the samples anahrzed in accordance with the than of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 2of6 <br />