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A5 • HISTORICAL GROUNDWATER ANALYTICAL DATA Cohn Property Stockton California , Sample Date of TPH as Aromatic Volatile Organics Seven Fuel Oxvgenates ID Sampling Gasoline Benzene Toluene Ethyl- Total DIPS ETBE MTBE TAME ITBA Ethanol Methanol Benzene Xylenes (pg/L) 1L 1L 1L !L IL 1L 1L IL 1L 1L IL ES-1 6130105 <50 76 <0 50 <0 50 <10 <0 50 <0 50 <0 50 <0 50 <5 0 AS-1 9126101 260 000 38,000 31 000 3,400 18 000 <250 <250 <250 <250 <2 500 12!11101 3,900 610 390 43 300 <20 <20 <20 <20 <200 12!17!01 2 700 460 290 29 220 <20 <20 <20 <20 <200 12127!01 1800 280 180 19 150 <20 <20 <20 <20 <200 113102 2 500 360 230 24 180 <50 <5 0 <50 <50 <50 3!3!03 -- -- --- --- -- — -- --- --- --- — — AS-1 (s) 9!26101 260,000 35 000 30 000 3 400 18,000 <250 <250 <250 <250 <2 500 12!11101 1,900 240 160 17 140 <10 <10 <10 <10 <100 12/17/01 2 600 430 270 30 220 <20 <20 <20 <20 <200 12127/01 4,800 720 500 62 430 <20 <20 <20 <20 <200 113102 2 900 450 300 31 240 <10 <10 <10 <10 <100 313103 150 000 15 000 11 000 1 000 15 000 <200 <200 <200 <200 <2 000 — — AS-1(d) 9126101 270 000 35 000 32 000 3 600 19,000 <250 <250 <250 <260 <2 500 12111!01 6 000 900 600 70 490 <20 <20 <20 <20 <200 12117/01 6,700 1 100 800 82 540 <20 <20 <20 <20 <200 12127!01 2,800 460 280 31 230 <20 <20 <20 <20 <200 1!3102 6,200 870 620 67 490 <20 <20 <20 <20 <200 1214102 360,000 47 000 35,000 3 900 20,000 <1 000 <1,000 <1 000 <1 000 <10,000 313103 380 000 44 000 28 000 2 900 21,000 <500 <500 <500 <500 <5,000 — PZ-1 a(s) 9126/01 290 000 37 000 38 000 3 600 18 000 <250 <250 <250 <250 <2 500 12111!01 380 000 46 000 42,000 3200 20,000 <400 <400 <400 <400 <4 000 12!17101 330 000 51 000 46 000 2 900 20 000 <1 000 <1 000 <1 000 <1 000 <10 000 12/27/01 340 000 59 000 51 000 3,400 20 000 <1,000 0,000 <1 000 <1 000 <10,000 113102 340 000 52,000 45 000 3,100 t8 000 0,000 <1 000 <1 000 <1,000 <10 000 313103 – – — – – — — — APEX ENUIROTECH INC THIRD QUARTER 2005 Page 8 of 9 COHOi 001