Hill AFB is located in northern Utah, approximately 30 miles north of Salt Lake City and 5 miles south of Ogden. Hill AFB, originally “Hill Field” in 1940, is part of the Air Force Materiel Command. The Ogden Air Logistics Center is also based at Hill AFB. The Ogden Air Logistics Center performs operational and support missions such as engineering and logistics management for various aircraft and intercontinental ballistic missiles. Dating back to World War II, Hill AFB has been the site for maintenance and repair activities for numerous types of aircraft. Activities at Hill AFB generate various wastes including chlorinated and non-chlorinated solvents and degreasers, fuels, other hydrocarbons, acids, bases and metals. Waste products were historically disposed of at the Industrial Wastewater Treatment Plant (IWTP), in disposal pits and landfills on Hill AFB, or at other Air Force facilities. Waste disposal in disposal pits and landfills ceased in 1980.