Keywords: Air pollution, aquifer, cargo, case history, depth, diesel fuel, economic factor, ground water, heating fuel, hydrocarbon, in situ, injection well, meeting papter, motor fuel, motor gasoline, motor vehicle, oil waste, petroelum fraction, physical property, physical separation, pollution ocntrol, pollution control equipment, service staton, soil (earth), soil pollutant, soil pollution, stripping, subsurface, thermodynamic property, unleaded gasoline, vapor pressure, volatile organic compounds, waste material, water pollutant.