THE RADON REPORTER | 21 Page | 1 Technical Bulletin: SGM-SF and SGM-MFLB SGM-SF 2023 Soil Gas Mitigation Standards for Existing Homes SGM-MFLB 2023 Soil Gas Mitigation Standards for Existing Multifamily, School, Commercial, and Mixed-Use Buildings (RMS-MF and RMS-LB consolidated and updated) Objective The purpose of this document is to provide concerned parties with an overview of recent revisions to the ANSI/AARST Standards, Soil Gas Mitigation Standards for Existing Homes (SGM-SF 2017), Radon Mitigation Standards for Multifamily Buildings (RMS-MF 2018) and Radon Mitigation Standards for Schools and Large Buildings (RMS-LB 2018). These standards were recently revised, with RMS-MF and RMS-LB consolidated into a single standard. Scope This Technical Bulletin addresses recent revisions of one ANSI/AARST mitigation standard and the revision and consolidation of two mitigation standards. This bulletin is relevant only to these latest revisions. It does not address revisions prior to the 2017-18 updates, nor does it address revisions to any other ANSI/AARST standards that may have been recently updated. Background The AARST Consortium “Committee for Radon and Soil Gas Mitigation Standards” is the body responsible for continual review and update of all ANSI/AARST standards. This committee is made up of industry, construction and regulatory professionals, and all proposed revisions are also subject to public review and comment. During the years since the 2018 publication of these standards, the committee has reviewed, revised, consolidated and finalized publication of the standards identified in this document. Historical Overview A provisional ANSI/AARST RMS-MF standard was published in 2013, with formal publication in 2014, along with the sibling standard RMS-LB, and was followed by publication of SGM-SF in 2017. The work entailed complete review of previously published mitigation standards (e.g. EPA RMS and ASTM E2121), where content addressed only mitigation in homes. As these new standards addressed both low-rise and high-rise buildings, more complicated enhancement was needed for: communication between all parties; diagnostics prior to design; separation between ASD content and content for sealing between soil and indoor air, because non-ASD methods often considered for large buildings still usually requires sealing. Non-ASD mitigation methods were addressed to provide minimums for diagnostics and design. Due to the size of many larger buildings, details that can impact public health and the magnitude of cost for larger buildings procedures were elaborated on more explicitly than previously. Because one system can intentionally mitigate multiple dwellings or commercial units, or inadvertently impact such occupied __________________________________________________________________________________ Technical Bulletin, MA-MFLB March 2024
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