This standard encompasses monitoring all types of airborne radioactivity including aerosols@ noble gases@ iodines@ and tritium in the workplace@ in effluent@ and in the environment. This standard includes initial design@ manufacture@ minimum performance@ performance testing@ calibration@ and maintenance requirements. This standard covers both real-time monitors and air samplers. Purpose The purpose of this standard is to integrate the relevant materials from ANSI N42.17B@ ANSI N42.18@ ANSI N42.30@ and ANSI N323C into a single standard.1 The intended users would be government and commercial facilities having the potential for airborne radioactivity.