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. place in the model at the locations of VSB13 , VSB14 and VSB15 . These wells were set to inject 0 . 0001 ft3/sec of contaminated water. The concentraction of the injected water was set to a value that would produce a contaminate impacted on the ground water over a period of 100 years equal to the calculated 100 year impact . The concentrations needed by the model are in mg/l, the i.n3ectzon wells are set to in3ect 0 . 00283 1/sec (0 . 0001 ft3/sec x 28 . 31/ft3 ) . The concentration of the injected fluid was calculated from the the 100 year total impact by finding the average per second influx rate. A = 100 year impact pounds A lb x 453 ._59gm/lb_x 1000 mg/gm 100 years x 365 days x 1440 min x 60 sec x 0 . 0028 140< A x 0 . 0513 mg/l lb. Polygon Gasoline Toluene Ethylbenzene Xylene VSB13 0 . 77 mg/l <0 01 mg/l 0 . 04 mg/l 0 .45 mg/1 VBS14 4 . 1 mg/l 0 01 mg/l 0 . 01 mg/l 0 36 mg/l VSB15 0 . 82 mg/l 0 . 02 mg/l 0 015 mg/l 0 26 mg/l With gasoline comprising the highest concentration it was modeled for 100 years influx In addition to the influx of gasoline range hydrocarbons, two sources of Oxygen were included in the model The water entering the site from outside the model boundaries was set to a concentration of 8 mg/1 Oxygen and the reaeration rate, the rate that the water gains oxygen from the air was set at 0 . 00005/day. After one hundred years the model indicates that the ground water will be impacted mainly in the area under VSB14 (see figure 3) . The main effect of the hydrocarbon infiltration is an area of Oxygen depleted ground water down gradient of the of the influx sites (see figure 4) as the hydrocarbons biodegrade Areas with some dissolved oxygen should biodegrade any oxygen in contact with them. The model indicates that the plume resulting from the influx from the current hydrocarbon soil contamination will not leave the property. •