This standard of practice specifies minimum requirements and general guidance for mitigation of radon and soil gas in existing multifamily buildings. The techniques addressed in this standard provide whole-building consideration yet also apply to portions of a building or individual occupied spaces.

mprovements to RMS-MF 2018 include harmonized provisions with ANSI/AARST standards RMS-LB (schools and large buildings), SGM-SF (existing homes) and CC-1000 (new construction).