SGM-SF_2017with 12/20 Revisions

1 ANSI/AARST SGM-SF 2017 (with 1220 revisions) Soil Gas Mitigation Standards for Existing Homes SGM-SF 2017 rev. 12/20 Soil Gas Mitigation Standards for Existing Homes Note—12/20 Revisions (Sections 1 -5 do NOT contain changed requirements) 1.0 SCOPE 1.1 This standard of practice specifies practices, minimum requirements and general guidance for reducing soil gas entry into existing homes in order tomitigate occupant exposures to certain hazardous soil gases, including radon gas, chemical vapors and other hazardous gases. This standard of practice is applicable to residential structures to include: those not more than three stories above grade in height; those often classified as single-family structures 3 ; and those that contain not more than four attached dwelling units on a contiguous foundation. 1.1.1 This standard of practice addresses a wide range of mitigation methods and additionally provides guidance for health and safety, system design, system installation, and ongoing stewardship. 1.1.2 This standard of practice is applicable to existing homes be they rented or owned, including timeshare properties. 1.2 Limitations 1.2.1 Water and building materials This standard of practice does not specify radon mitigation practices associated with radon in water, building materials or other less common sources of radon gas. 1.2.2 Outside air and combustible gas This standard does not address mitigating hazards from gases or substances in outside air and does not fully address all practices associated with mitigation of potentially combustible soil gases. 1.2.3 Removal of contaminated source materials This standard does not address practices or techniques associated with removal of contaminated source materials, including: a) chemically contaminated earth and groundwater within or immediately under a building; b) capture, containment and disposal of chemically contaminated vapor or condensate; and c) chemical products be they stored or associated with building materials. 1.2.4 Attached dwellings This standard of practice does not specify all practices that may be appropriate when structures contain two or more attached dwellings . See ANSI/AARST RMS-MF Radon Mitigation Standards for Multifamily Buildings Section 8.3.5 and Section 10.4 regarding collateral mitigation . 1.2.5 Jurisdictional compliance This standard does not contain all code or other requirements of the jurisdictions where the mitigation system is being installed. Although the provisions in this standard have been reviewed for potential conflicts with other regulatory requirements, adherence to this standard does not guarantee or supersede compliance with the applicable codes or regulations of any federal, state or local agency with jurisdiction. 1.2.6 Safety This standard of practice is not intended to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices. It is the responsibility of the user of this standard to determine the applicability of regulatory limitations prior to use. 3 As point of reference, see the International Residential Code (IRC) Section R101.2 .