IEA Sept. 2024 Radon Reporter

18 | September 2024 Page | 1 Technical Bulletin, MA-MFLB March 2024 Technical Bulletin: MA-MFLB MA-MFLB 2023 Protocol for Conducting Measurements of Radon and Radon Decay Products in Multifamily, School, Commercial, and Mixed-Use Buildings (MAMF and MALB 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, Protocol for Conducting Measurements of Radon and Radon Decay Products in Multifamily Buildings (MAMF 2017) and Protocol for Conducting Measurements of Radon and Radon Decay Products in Schools and Large Buildings (MALB 2014). These standards were recently revised, with MAMF and MALB consolidated into a single standard. Scope This Technical Bulletin addresses recent revisions and consolidation of two ANSI/AARST radon measurement standards. This bulletin is relevant only to these latest revisions. It does not address revisions prior to the 2014-17 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 Measurement Standards” is the body responsible for continual review and update of all ANSI/AARST radon measurement 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 2014 and 2017 publication of these standards, the committee has reviewed, revised, consolidated, and finalized publication of the standards identified in this document. Historical Overview The ANSI/AARST MALB standard was published in 2014, along with the sibling standard, MAMF, in 2017. The scope of effort entailed a complete review and update of previously published radon measurement standards. Harmonization began in 2020, using the same text for identical tasks within MAMF 2017 and MALB 2014. For needs of compliance assessment after the fact, informational content was moved from within the standard to the attached companion guidance. With many requirements being the same, the effort also sought consolidation of MAMF and MALB into a single standard. 1/21 Transitional Revisions Prior to consolidation of MAMF and MFLB, harmonized versions were published as revisions to the existing documents. The focus included Sections 2 through 8. Most informational content was relocated to the Companion Guidance. __________________________________________________________________________________

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