Radon Standards of Practice
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Note: Federal participation in the development and use of voluntary consensus standards, and in conformity assessment activities, is governed by the National Technology Transfer and Advancement Act (1995), and Circular A-119 (2016, 1998) issued by the Office of Management and Budget, Executive Office of the President. Since about 2012, EPA has been actively participating in the radon industry led ANSI/AARST voluntary consensus-based standards process. As a general principle, the Federal government’s reliance on privately developed voluntary consensus based standards is to be preferred over the Federal government developing such standards. For more information, please visit "Guidance on the Use of Voluntary Consensus Standards for State Indoor Radon Grant Recipients."
Current Radon Standards of Practice
Copies of the following Radon Standards of Practice may be viewed, purchased or printed from Association of Radon Scientist and Technologists Standards webpage or from the American National Standards Institute store. To view the standards, please click on the appropriate links below.
Radon Mitigation Standards for Schools and Large Buildings (RMS-LB 2018)
This new American National Standard addresses the complexities of properly mitigating radon in large and complicated building structures that require specialized techniques and quality assurance to address complicated building designs and specialized airflow.
Protocols for Measuring Radon and Radon Decay Products in Schools and Large Buildings (MALB 2014)
This new American National Standard addresses the complexities of properly measuring radon in large and complicated building structures that require specialized techniques and quality control and assurance to address complicated building designs and specialized airflow.
Protocol for Conducting Radon and Radon Decay Product Measurements in Multifamily Buildings (MAMF-2017)
This ANSI/AARST standard is for measuring radon levels in multifamily housing.
Radon Mitigation Standards for Multifamily Buildings (RMS-MF 2018)
This new American National Standard addresses the complexities of properly mitigating multifamily dwelling over four units that require specialized techniques and quality assurance.
Protocols for Measuring Radon and Radon Decay Products in Homes (MAH 2019)
This American National Standard is the first complete consensus standard and is an update of the 1993 EPA Protocol on Radon and Radon Decay Measurement in Homes.
Reducing Radon in New Construction of 1 & 2 Family Dwellings and Townhouses (CCAH 2020)
This standard provides minimum requirements for the rough-In of radon control system components in new dwelling units under construction. CCAH also includes minimum requirements for verifying if radon concentrations are below the national action level and, if required, activation of radon control systems. This standard is harmonized to compliment the standard designated as ANSI/AARST RRNC, which replicates construction activities for rough-In components only
Soil Gas Mitigation Standards for Existing Homes (SGM-SF 2017)
The newest standard and the only American National Standard on radon mitigation for single-family homes. It also addresses mitigation of chemical vapor intrusion and virtually all non-ASD mitigation methods.
Soil Gas Control Systems in New Construction of Buildings (CC-1000 2018)
This new standard addresses RRNC construction for virtually every building that is larger than a one- and two-family dwelling.
Performance Specifications for Instrumentation Systems Designed to Measure Radon Gas in Air (MS-PC 2015)
Every step of measurement and QA relies on performance of devices. A comparative examination of Spikes, Dupes, Blanks, Performance Tests and Calibration.
Radon Measurement Systems Quality Assurance(MS-QA 2019)
This standard specifies minimum requirements for quality systems designed to quantify the concentration of radon-222 gas in air by qualified professionals (QPs) and laboratories, whose data are intended to be used to determine the need for, or success of mitigation.
Rough-In Of Radon Control Components In New Construction Of 1 & 2 Family Dwellings And Townhouses (RRNC-2020)
This standard provides minimum requirements for the rough-In of radon control system components in new dwelling units under construction. This standard is harmonized with ANSI/AARST CCAH, which additionally addresses requirements for verifying if radon concentrations are below the national action level and, if required, activation of radon control systems.
Protocol for the Collection, Transfer and Measurement of Radon in Water (MW-RN-2020)
This standard of practice contains minimum requirements and guidance for measuring radon in water that enters a building through groundwater supplies for determining if mitigation is necessary to protect current and future occupants of dwellings and other buildings. This standard includes procedures for the collection and transport of water samples, as well as protocols for the quantitative transfer of the sample to a measurement device to determine radon concentrations in water.
Archived Radon Standards of Practice for Reference
Indoor Radon and Radon Decay Product Measurement Device Protocols(EPA 402-R-92-003, May 1993)
Radon Measurement in Schools (Revised Edition - Second Printing)
Model Standards and Techniques for Control of Radon in New Residential Buildings(EPA 402-R-94-009, March 1994)