seepage• By the sampling point there is an iridescence on the water which regularly fans out, indicating a seepage of oil.• No one in town has taken floodwater, though some basements are wet from seepage.• Manureseepage from storage areas is pollutingwaterways and evaporating ammonia is contributing to acidrain.• There was some oil seepage from the valves in the car's engine.• A more sinister development is the seepage of nitrate into aquifers which are used as sources of the domestic water supply.• However, this seepage was slight and not a problem.• Most homes in town get some water in their basements, mostly due to seepage from the rain.• This will prevent water seepage into the building.