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• T�5 <br /> HISTORICAL GROUNDWATER ANALYTICAL DATA <br /> Cohn Property <br /> Stockton,California <br /> Sample Date of TPH as Aromatic Volatile Organics Seven Fuel Oxygenates <br /> ID Sampling Gasoline Benzene Toluene Ethyl Total DIPE ETBE MTBE TAME TBA 1,2-DCA EDB <br /> Benzene Xylenes <br /> 1L IL !L iL 1L 1L lL !L IL !L 1L <br /> PZ-1a(d) 9/26/01 310,000 45 000 47 000 3,400 17,000 <250 <250 <250 <250 <2 500 — — <br /> 12/11/01 270 000 37 000 33 000 2 300 13 000 <400 <400 <400 <400 <4 000 — — <br /> 12/17/01 320 000 52 000 45 000 3 300 19 000 <1 000 <1 000 <1,000 <1,000 <10,000 --- — <br /> I M7101 290 000 51,000 42 000 3 400 19 000 <1 000 <1 000 <1 000 <1 000 <10,000 --- — <br /> 113102 290 000 45 000 36 000 3 000 17 000 <1 000 <1 000 <1 000 <1 000 <10 000 -- — <br /> 1214102 400 000 45 000 53 000 4 400 23 000 <1 000 <1 000 <1 000 <1,000 <10,000 --- — <br /> 313103 440 000 50 000 48 000 3 100 22,000 <500 <500 <500 <500 <5 000 --- — <br /> PZ-15(D) 9/26101 310 000 35 000 47 000 3 400 18 000 <250 <250 <250 <250 <2 500 — -- <br /> 12/11/01 310 000 36 000 46 000 3,100 17 000 <400 <400 <400 <400 <4,000 — <br /> 12l17101 290 000 37 000 51 000 3 300 18 000 <1 000 <1 000 <1 000 <1 000 <10 000 --- — <br /> 12/27/01 300 000 43 000 53 000 3 800 21 000 <1 000 <1 000 <1 000 <1 000 <10 000 --- — <br /> 113102 300 000 36 000 46 000 3 100 17,000 <1 000 <1 000 <1 000 <1 000 <10 000 --- — <br /> 1214102 360 000 36 000 53 000 4,100 23 000 <1,000 <1 000 <1 000 <1 000 <10 000 --- — <br /> 313103 430 000 39 000 57 000 3 400 24 000 <500 <500 <500 <500 <5 000 — --- <br /> Notes <br /> TPH-Total Petroleum Hydrocarbon --- Not Analyzed <br /> DIPE-DHsopropyl Ether ICC(Effluent) sample collected between the first and second Arbon vessels filtering the fadotys water <br /> ETBE Ethyl Tertiary Butyl Ether 2CC(Effluent) sample collected atter both carbon vessles filtering the facilitys water <br /> MTBE Methyl Tertiary Butyl Ether pg1L micrograms per Inter <br /> TAME TertiaryAmyl Methyl Ether <br /> TBA-Tertiary Butyl Ether <br /> 12 DCA-1 2 Drchloroothane <br /> EDB Ethyl Dibromide <br /> APEX EWROTECH INC <br /> FOURTH QUARTER 2905 <br /> Page 9 of 9 COH01 001 <br />