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To 5 HISTORICALR NDWATER ANALYTICAL DATA G OU C TA Cohn Property Stockton,California Sample Date of TPH as Aromatic Volatile Organics I Seven Fuel Oxi cienates ID Sampling Gasoline Benzene Toluene Ethyl- Total I DIPE ETRE MTBE TAME TBA Ethanol Methanol Benzene Xylenes 1L 1L 1L !L 1L 1L 1L 1L 1L 1L 1L 1L PZ la(d) 9126101 310 000 46 000 47 000 3 400 17 000 <250 <250 <250 <250 <2 500 12/11/01 270 000 37 000 33 000 2 300 13 000 <400 <400 <400 <400 <4 000 12117/01 320 000 52 000 45 000 3 300 19 000 <1 000 <1 000 <1 000 <1 000 <10 000 12/27/01 290,000 51 000 42 000 3 400 19 000 <1 000 <1 000 <1,000 <1,000 <10 000 113102 290 000 45 000 36,000 3,000 17,000 <1 000 <1 000 <1 000 <1 000 <10,000 1214102 400 000 45 000 53 000 4 400 23 000 <1 000 <1 000 <1,000 <1,000 <10 000 313103 440 000 50 000 48 000 3,100 22 000 <500 <500 <500 <500 <5,000 -- - PZ-1 b(D) 9/26101 310 000 35,000 47,000 3 400 18 000 <250 <250 <250 <250 <2 500 12/11/01 310 000 36 000 46 000 3,100 17 000 <400 <400 <400 <400 0,000 12/17/01 290,000 37 000 51 000 3,300 18 000 <1,000 <1,000 <1 000 <1 000 <10,000 12/27/01 300 000 43,000 53 000 3 800 21 000 <1 000 <1 000 <1 000 <1 000 <10 000 1/3102 300 000 36,000 46 000 3 100 17 000 <1 000 <1 000 <1,000 <1,000 <10000 1214!02 360 000 36 000 53 000 4,100 23,000 <1,000 <1 000 <1 000 <1 000 <10,000 313/03 430 000 39,000 57,000 3 400 24 000 <600 <500 <500 <500 <5,000 - - Notes TPH Total Petroleum Hydrocarbon -- Not Analyzed DIPE-Di-Isopropyl Ether 1CC(Effluent) sample collected between the first and second carbon vessels filtering the facility's water ETBE-Ethyl Tertiary Butyl Ether 2CC(Effluent) sample collected after both carbon vessles filtenng the facility's water MTBE-Methyl Tertiary Butyl Ether pglL-micrograms per liter TAME-TeruaryAmyl Methyl Ether TBA-Tertiary Butyl Ether I APEX ENVIROTECH INC THIRD QUARTER 2005 Page 9 of 9 COH01 001