This Safety Standard provides requirements for intervention of areas, including land and industrial sites, that have been contaminated as a result of human activities and could cause the prolonged exposure to radiation of workers and members of the public. This publication establishes requirements in relation to protective and remedial actions intended to reduce actual prolonged exposure, to avert potential prolonged exposure or to reduce the likelihood of the occurence of such exposure. This document does not apply to situations arising from normal operation of appropriately controlled practices.