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T�5 HISTORICAL GROUNDWATER ANALYTICAL DATA Cohn Property Stockton,California Sample Date of TPH as Aromatic Volatile Organ cs Seven Fuel Oxygenates ID Sampling Gasoline Benzene Toluene Ethyl Total DIPS ETBE MTBE TAME TBA 1,2 DCA EDB Benzene Xylenes 1L /L 1L ILI 1L 1L L 1L 1L 1L 1L MW-10 9125101 <50 <0 50 <0 50 <050 <050 <2 0 <2 0 <20 <20 <20 — — 12/18/01 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <20 <2 0 <20 --- — 414102 130 09 <0 50 <0 50 <1 0 <2 0 <20 <2 0 <2 0 <20 — 6/25102 830 37 10 06 15 <20 <20 <2 0 <2 0 <20 --- -- 9124102 <50 <0 50 <0 50 <0 50 <10 <20 <2 0 <20 <20 <20 — — 1214/02 62 <0 50 <0 50 <0 50 <10 <20 <20 <20 <20 <20 — — 313103 180 <0 50 <0 50 <0 50 <10 <20 <2 0 <2 0 <20 <20 -- - 6/11/03 120 <0 50 <0 50 <0 50 <10 <2 0 <20 <2 0 <20 <20 919103 180 060 <0 50 <0 50 <10 <2 0 <20 <2 0 <2 0 <20 — - 1213103 160 10 <1350 <0 50 <10 <0 50 <050 <0 50 <0 50 <50 — - 3/25104 130 <0 50 <0 50 <0 50 <10 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <0 50 6122104 130 1 1 <050 <0 50 <1 0 <5 0 — --- — — — — 9123104 <50 <0 50 <0 50 <0 50 <1 0 <5 0 — — — --- — — 12f7104 <50 <0 50 <050 <0 50 <1 0 <5 0 — — --- — 314105 <50 <0 50 <0 50 <0 50 <1 0 <50 — — --- — 6130/05 <50 <0 50 <050 <0 50 <1 0 <0 50 <0 50 <0 5D <0 50 <5 0 -- — 9/19/05 <50 <0 50 <D 50 10 17 <0 50 <0 50 <0 50 <0 50 <50 — 12/8/05 <50 <0 50 <0 50 <D 50 <1 0 <050 <0 50 <050 <050 <5 0 <2 0 <2 0 PJI DW 11/16/98 --- 6 4 85 1 1 4 6 -- — --- — — �0/f � v (Influent) 4/7199 <50 <0 50 <0 50 <0 50 <0 50 <2 0 <2 0 <20 <2 0 <200 - — 6 �lg.D G 5130100 1200 128 14 14 130 <0 50 <0 50 <0 50 <0 50 <50 -- — 12114/DO <50 169 2 <0 50 22 <2 0 <20 <2 0 <2 0 <20 — 6119/01 <50 43 51 0 7 46 <20 <20 <2 0 <2 0 <20 — — 9126/01 740 68 65 10 48 <2 0 <20 <2 0 <2 0 <20 — - 12118/01 260 24 25 35 23 <20 <2 0 <2 0 <20 <20 — 414102 3,300 430 170 24 200 <20 <2 0 <2 0 <20 <20 — 6/25102 88 000 8,900 8 500 1 800 8200 <200 <200 <200 <200 <2 000 — — 9124/02 82 000 7 300 8,800 1 300 6,300 <200 <200 <200 <200 <2,000 — - 12/4/02 21000 1,600 1100 85 2100 <20 <20 <20 <20 <200 — - 313/03 12 000 1 100 710 48 1 300 <20 <20 <20 <20 <200 — 6111103 12 000 910 700 55 1 100 <20 <20 <20 <20 <200 — --- DWA-1 7121103 24 000 2 500 2 700 360 2 300 <20 <20 <20 <20 <200 <20 <20 DW-1-2 7121103 10 000 920 730 99 760 <2 0 <2 0 <2 0 <2 0 <20 <2 0 <2 0 9/9/03 49 000 2200 2 600 420 2 400 <40 <40 <40 <40 <400 — --- 3126104 11000 1,800 1300 140 1400 <10 <10 <10 <10 <100 <10 <10 6122104 13 000 2200 1 500 240 1,400 <100 — — --- --- — — 12f7104 69 000 1200 940 150 990 <20 <20 <20 <20 <200 — — 314105 11000 2100 1700 220 1400 <250 <20 <20 <20 <200 — --- 6/30105 50 000 7 400 8 400 1,100 7 300 <0 50 <0 50 <0 50 <0 50 38 — --- 9119105 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <50 1217105 40,000 7,700 5,600 1,400 6,700 <0 50 <0 50 <0 50 <0 50 <50 <2 0 '20 t'Uh. rheo6 DW 3602 818105 <50 <050 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <50 <2 89 12/21/05 <50 <0 50 <0 50 <050 <y98, <0 50 c4 50 <0 50 <0 50 c5 0 < 0 K t� DW 3604 818105 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <50 <2 0 17 12/21/05 <50 <0 50 <0 50 <0 50 -51110 <0 50 <0 50 <0 50 <0 50 <50 <5 0 «nQ E+Or APEX ENVIROTECH INC FOURTH QUARTER 2005 Page 0 of 9 COH01 007