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• *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 fDBj <br /> Benzene Xylenes <br /> 1L 1L 1L It 1L !L 1L 1L !L /L 1L <br /> MW-6 12/14/00 170 000 10 000 9200 4 500 23 000 <100 <100 <100 <100 <1 000 --- — <br /> 6119/01 160 000 4 300 12,000 5,400 35 000 <100 <100 <100 <100 <1 000 — <br /> 9125101 140,000 7 500 6 100 4 100 23 000 <100 <100 <100 <100 <1 000 – — <br /> 12/17/01 100 000 8 500 2 900 4 000 21 000 <200 <200 <200 <200 <2 000 — <br /> 414102 210 000 7 300 8200 5 300 34 000 <200 <200 <200 <200 <2 000 — — <br /> 6125/02 100 000 12 000 6 400 5,100 27,000 <200 <200 <200 <200 <2,000 — <br /> 9/024102 140 000 12 000 1 600 5 100 22 000 <200 <200 <200 <200 <2 000 — – <br /> 12/4102 150 000 13 000 920 4,700 20,000 <400 <400 <400 <400 <4 000 — <br /> 313103 180 000 15 000 570 5 400 21 000 <200 <200 <200 <200 <2 000 – — <br /> 6111/03 130 000 12 000 310 4,500 16 000 <200 <200 <200 <200 <2 000 — - <br /> 919103 150 000 13 000 500 5,000 14 000 <200 <200 <200 <200 <2 000 — - <br /> 1213103 110 000 14 000 500 4 900 15 000 <200 <200 <200 <200 <2,000 -- — <br /> 3/26104 60 000 11 000 180 3 600 12 000 <200 <200 <200 <200 <2 000 <20 <20 <br /> 6122104 73 000 12,000 200 4 000 11,000 <500 — --- — -- — — <br /> 9/23104 66 000 8 800 230 4 500 12 000 <500 --- — — — <br /> 1217l04 52 000 9 300 170 4 000 9 700 <500 --- — — _ — — <br /> 314105 55,000 11,000 180 4,800 10,000 <250 — --- — _ — — <br /> 6/30105 70 000 9 700 690 4200 9 900 <0 50 <0 50 <0 50 <0 50 160 — <br /> 9119105 62 000 11,000 810 3 700 10 000 <0 50 <0 50 <0 50 <0 50 <5 0 - <br /> 1218/05 62,000 12,000 610 4,200 9,500 <10 <10 <10 <10 <100 <2 0 <2 0 <br /> 6>ri3 xe-et <br /> MW 7 12/14/00 160 000 19 210 380 1 600 <20 <20 <20 <20 <200 — <br /> 6/19101 630 23 26 77 43 <10 <10 <10 <10 <100 — --- <br /> 9/25101 100 060 <050 <0 50 <0 50 <2 0 <2 0 <2 0 <2 0 <20 — --- <br /> 12117/01 760 17 24 70 53 <10 <10 <10 <10 <100 — --- <br /> 414102 2,600 63 72 60 10 <10 <10 <10 <10 <100 --- — <br /> 6125102 990 23 12 35 1 3 <20 <2 0 <2 0 <2 0 <20 — — <br /> 9/024/02 2 900 160 33 32 11 <2 0 <20 <2 0 <2 0 <20 — - <br /> 1214/02 18 000 370 190 690 2000 <20 <20 <20 <20 <200 — – <br /> 3/3103 13 000 320 56 430 960 <20 <20 <20 <20 <200 – — <br /> 6/11103 3,600 50 130 46 180 <20 <20 <20 <20 <200 — <br /> 919103 6 500 60 45 94 140 <20 <20 <20 <20 <200 – <br /> 1213103 35 000 250 81 880 2 900 <4 0 <4 0 <4 0 <40 <40 — <br /> 3125104 6,700 35 11 130 360 <40 <40 <40 <40 <400 <40 <40 <br /> 6122104 15 000 110 50 550 1600 100 — --- — -- — <br /> 9/23104 20 000 250 140 810 2600 <40 <40 <40 <40 <40 — <br /> 1217104 19,000 330 140 690 2200 <100 --- — — — w v <br /> 3/4105 6 000 19 120 150 660 <50 — — — <br /> 6130105 2 700 28 29 57 140 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 9119/05 13 000 190 330 690 1 800 <0 50 <0 50 <0 50 <0 50 <5 0 p <br /> 1218105 21,000 220 440 810 2,600 <50 <5 0 <5 0 <50 <50 1<2 0 <20 <br /> EfG 1Zted <br /> APEX ENVIROTl;CH INC <br /> FOURTH QUARTER 2005 <br /> Page 4 of 9 COHO1 001 <br />