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(�equoia 404 N. WiLane <br /> �7 [.l Walnut Creels,CAA 94598 <br /> t5)— <br /> AFAX Analytical (925'988-9600 <br /> (925)988-9673 <br /> Ryan,Inc.-Dublin Project: Unocal <br /> �47 Sierra Court Suite J Project Number: Unocal#11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09-Dec-99 08:34 <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 /> TB-LB(W91158O-01)Water Sampled. 19-Nov-99 00:00 Received.22-Nov-99 16:00 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9K29001 29-Nov-99 29-Nov-99 EPA <br /> Benzene ND 0.50 " 8015M/8020 <br /> Toluene 0.58 0.50 <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether 6.3 2.5 <br /> Surrogate:a,a,a-Trifluorotoluene 967% 70-130 " <br /> MW-1 (W91158O-02)Water Sampled: 19-Nov-99 15:10 Received: 22-Nov-99 16:00 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9K29001 29-Nov-99 29-Nov-99 EPA <br /> Benzene ND 0.50 " 8015M18020 <br /> Toluene 2.2 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) 2.0 0.50 <br /> Surrogate:a,a,a-Tris luorotoluene 100% 70-130 " <br /> -1 (W91158O-02RE1)Water Sampled: 19-Nov-99 15.10 Received:22-Nov-99 16:00 <br /> thyl tert-butyl ether 2500 13 ug/l 5 9K29001 29-Nov-99 29-Nov-99 EPA <br /> Surrogate:a,a,a-Trifluorotoluene 93.3% 70-130 " <br /> MW-2(W91158O-03)Water Sampled. 19-Nov-99 1123 Received:22-Nov-99 16:00 <br /> Purgeable Hydrocarbons ND 50 ug/1 1 9X29001 29-Nov-99 29-Nov-99 EPA <br /> Benzene ND 0.50 " " " 8015M/8020 <br /> Toluene 2.9 0.50 <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) 3.5 0.50 <br /> Methyl tert-butyl ether 120 2.5 " <br /> Surrogate:a,a,a-Trifluorotoluene 107% 70-130 " <br /> Sequoia Analytical-Walnut Creels The results in flus report apply to the samples analyzed in accordance with rhechain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> r Al .Kemp,Laboratoiy Ihiector Page 2 of 12 <br /> I <br /> i <br />