THE CITY OWNS AND OPERATES THE BANGOR INTERNATIONAL AIRPORT. FROM ONE OF THE BUILDINGS IT DISCHARGES CONTAMINATED GROUNDWATER (JET FUEL). TO A FLOOR DRAIN AND THRU TO THE STORM DRAIN SYSTEM. W/O AN NPDES PERMIT. WE INVESTIGATED THE AIRPORT BUILDINGS AND FOUND 1 BUILDINGS W/18 FLOOR DRAIN GOTING TO THE STORM DRAIN SYSTEM W/O PERMITS. EPA HAD NO EVIDENCE OF POLLUTANT DISCHARGED INTO THE FLOOR DRAIN.