 Plans are freely available in the public domain in the reference "Nuclear War Survival Skills" by Cresson Kearny.Inhabitants should plan to remain sheltered for at least two weeks (with an hour out at the end of the first week – see Swiss Civil Defense guidelines), then work outside for gradually increasing amounts of time, to four hours a day at three weeks.The normal work is to sweep or wash fallout into shallow trenches to decontaminate the area.