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T�5 I HISTORICAL GROUNDWATER ANALYTICAL DATA Cohn Property Stockton California Sample Date of TPH as Aromatic Volatlle Or amcs Seven Fuel O enates 1D Sampling Gasoline Benzene Toluene Ethyl- Total DIPE ETRE MTBE TAME TBA 1,2-DCA EDB Benzene Xylenes !L !L !L !L !L IL !L 1L !LI (pglL) MW-8 12/14/00 30 000 480 810 850 2 600 <40 <40 <40 <40 <400 — --- 6119101 11 000 110 60 410 610 <20 <20 <20 <20 <200 — --- 9125101 5 600 69 58 320 77 <10 <10 <10 <10 <100 — — 12/17/01 3 500 65 62 390 74 <10 <10 <10 <10 <100 — — 414l02 7,600 120 9 480 130 <10 <10 <10 <10 <100 — -- 6l25102 7100 120 12 610 140 <10 <10 <10 <10 <100 — -- 91024/02 11 000 510 41 760 560 <20 <20 <20 <20 <200 — — 1214102 14,000 450 60 620 580 <20 <20 <20 <20 <200 — --- 313l03 8 300 330 27 470 270 <20 <20 <20 <20 <200 --- --- 6111103 8 400 270 13 430 150 <20 <20 <20 <20 <200 — — 9/9103 260 000 1 400 200 680 630 <20 <20 <20 <20 <200 — — 12/3103 18,000 2000 430 770 690 <20 <20 <20 <20 <200 --- --- 3125104 8 300 1 800 190 390 350 <20 <20 <20 <20 <200 <20 <20 6/22/04 9,100 2,400 32 750 220 <50 — — — — --- --- 9123/04 6100 1700 49 620 200 <50 — — — --- --- — 12MO4 3 900 1 000 <10 350 100 <100 — — — — --- — 3/4/05 4,400 1200 32 520 13 <25 --- — — -.- --- — 6130105 5 100 1,000 37 500 27 <0 50 <0 50 <0 50 <0 50 15 — - 9119/05 6 900 1200 29 750 100 <0 50 <0 50 <0 50 <0 50 <5 0 1218/05 5,500 1,200 <5 0 550 160 <5 0 <5 0 <5 0 <5 0 <50 <20 <2 0 Erin 14 etc d/ MW-9 9125101 <50 <0 50 <0 50 <0 50 <0 50 <2 0 <2 0 <20 <2 0 <20 — — 12/18/01 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <2 0 <2 0 <20 — - 4/4/02 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <20 <2 0 <2 0 <20 --- -- 6125102 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <2 0 <2 0 <20 --- — 9124102 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <2 0 <2 0 <20 — — 1214102 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <2 0 <2 0 <20 — — 3/3/03 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <2 0 <2 0 <20 — - 6/11103 <50 <0 50 <0 50 <0 50 <1 0 <20 <2 0 <2 0 <2 0 <20 --- 919103 <50 <0 50 <0 50 <0 50 <1 0 <2 0 <2 0 <2 0 <2 0 <20 — 1213103 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 --- 3125104 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 <0 50 <0 50 6122104 <50 <0 50 <0 50 <0 50 <1 0 <5 0 — --- — --- — — 9123104 <50 <0 50 <0 50 <0 50 <1 0 <5 0 --- — — — — 12l7/04 <50 <0 50 <0 50 <0 50 <1 0 <5 0 — — — .-. --- — 3/4/05 <50 <0 50 <0 50 <0 50 <1 0 <5 0 — — --- --- — — 6130105 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 — — 9119/05 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 121105 <50 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 <2 0 D G APEX ENVIROTECH INC, FOURTH OUARTER21)05 Page 5 of 9 COH01 001