Notes: In radiation safety norm of Mongolia, there are reference levels for new buildings 100 Bq/m3, old buildings 200 Bq/m3, and working places 1150 Bq/m3. But in Mongolia, there is no long time passive detection system established yet. (track etch detectors CR*-39). The GASI measures radon in public places with a short time active method RAD7 equipment.  