The decontamination containers help in ensuring this target. When using disposable overalls, these can be removed either outside or on the dirty side, before washing the boots, hands and vacuum cleaning the clothes. Entrance to the clean side goes through an air shower, where high speed – low pressure air is used to detach dust from the clothes.
On the clean side it is time to remove the personal protection gear, clean it up once more and leave to the clean areas.