General The provisions in this standard provide prescriptive minimum requirements for the construction of any building intended for human occupancy@ except for 1 and 2 family dwellings4@5 in order to reduce occupant exposure to radon and other hazardous soil gases. This standard and informational supplement6 address construction of buildings that include@ among others@ the use of a building or structure@ or a portion thereof for multifamily or congregate residential occupancies@ educational occupancies and commercial occupancies. Applicability This standard can be adopted as requirements for contractual relationships or as recommendations or requirements of an authority or jurisdiction. Informative??When deciding whether to require or apply practices set forth in this standard@ note that: a) Radon and other hazardous soil gas can be found in any location or building site regardless of existing surveys@ maps or listed sites; b) Local state radon programs often publish updated information on how often radon has been found locally; and c) An older radon zone map published by EPA (www.epa.gov adon) can be helpful where local data are not published.