The metal weapons casings were then thermally decontaminated and scrapped. The cavern was decontaminated and the reactor dismantled over the next few years. The laboratories were decommissioned in 1993, and the area was decontaminated. Mustard gas can be readily decontaminated through reaction with chloramine-T. Uranium can be decontaminated from steel surfaces and aquifers. In 1981, the U.S. Department of Energy decontaminated and decommissioned the site. The Department of Energy (DOE) reported the Cimarron plant as decontaminated and decommissioned in 1994. Gases from the reactors would be decontaminated before they would be released into the air. Once decontaminated to the maximum extent practical, pieces will be further fragmented for eventual disposal. Some of the largest areas committed to be decontaminated are in the Fukushima Prefecture, Japan. Many areas had to be decontaminated before they could be prepared for public use. Several helicopters were decontaminated after returning from flights. The Dayton Warehouse was decontaminated in 1950 and returned to its owners. He decontaminated her desk, computer, keypad and monitor, but did not notify his superiors. The estate was decontaminated and the residents were able to return.