Rough-in of Radon Control Components In New Construction of 1 & 2 Family ANSI/AARST RRNC 2020 Dwellings and Townhouses 1 RRNC Rough-in of Radon Control Components in New Construction of One- and Two-Family Dwellings and Townhouses SECTION 101 GENERAL 101.1 Purpose. The purposes of this standard shall be as follows: 1) This standard is intended to regulate the design and construction of buildings to facilitate the removal of radon gas. 2) To provide minimum requirements for the rough-In of radon control system components in new dwelling units under construction. 3) To provide requirements for adoption by states and local jurisdictions. 101.2 Scope. This standard shall be applicable only to in newly constructed one- and two-family dwellings and townhouses. SECTION 102 LIMITATIONS 102.1 General. The requirements of this standard shall have limitations as indicated in Sections 102.1.1 through 102.1.3. 102.1.1 Radon Testing. Testing to determine the actual radon levels in the structure is outside the scope of this standard. The application of the rough-in requirements of this standard does not guarantee that the National Action Level (NAL) or any other specific indoor radon concentration will be attained. 102.1.2 Soil-borne radon. The requirements of this standard address only soil-borne radon . Radon from other sources such as water and building materials are not addressed. 102.1.3 Soil testing. This standard does not require or provide guidance for soil testing or analyzing the radon potential of a building site prior to construction of the building.