Issue link: https://hi.iaq.net/i/650064
13 PRIORITY ISSUES ASSESSMENT PROTOCOLS Minimum Actions Expanded Actions Perform radon testing in accordance with applicable state requirements or federal guidance. Individuals conducting tests should be trained or certified by either of these groups: • National Environmental Health Association (NEHA) National Radon Proficiency Program. • National Radon Safety Board (NRSB). Notes Two radon tests may be performed simultaneously and averaged to increase confidence in the short- term test result. This approach can be used for both pre- and post-work testing. Another option is to take two tests sequentially. DO NOT average the pre- work and post-work test results. Long-term testing is the most accurate way to test for radon, but it may not be feasible. See EPA's Citizen's Guide to Radon for information on long- term testing. The recommended testing protocols are designed to ensure that radon exposure does not increase above EPA thresholds in homes where radon levels are initially below those thresholds. This protocol is not designed to mitigate radon risks that existed prior to the energy upgrade. All clients should be provided with radon testing results. Determine whether the home has an active or passive radon mitigation system. Note Active mitigation systems include a radon vent fan, usually located in an attic, in an attached garage or on the building exterior. Relevant Guidance/Standards ASHI Radon Mitigation System Inspection Checklist. EPA Radon Guidance: Guidance for Radon Testing and Mitigation. EPA Radon: State Radon Contact Information. When the pre-work radon level is ≥ 2 pCi/L, complete precautionary foundation air sealing strategies: • Cover exposed earthen floors in basements and crawlspaces according to section 1.2 of EPA's Indoor airPLUS Construction Specifications. • Air seal sumps (e.g., install an airtight sump cover) in such a way that water can drain from above and below the sump cover. • Install airtight drain fittings (e.g., trap or flange system) in foundation floor drains. • Seal and caulk penetrations, openings or cracks in below-grade walls and floors that contact the ground with a sealant that meets the requirements of ASTM C920. Note These foundation air sealing strategies are also important elements of radon mitigation according to ASTM E2121, which addresses both foundation air sealing and fan-powered radon mitigation systems. Educate the client about the test results and radon reduction measures that were followed. Inform the client that the radon testing protocols were completed to ensure that the energy upgrade work did not introduce indoor radon problems, but the protocols do not necessarily mitigate a prior indoor radon problem in the home. Advise the client to refer to EPA's Citizen's Guide to Radon for more information about radon risk. Mitigate in accordance with ASTM E2121 if: • Option 1: Post-work radon level is ≥4pCi/L AND it exceeds the pre-work radon level OR • Option 2: Post-work radon level is ≥4pCi/L AND no pre-work levels were taken. Relevant Guidance/Standards ASTM C920. ASTM E2121. EPA Radon. State Radon Contact Information. EPA Radon Guidance: Citizen's Guide to Radon. (Continued on next page) RADON (continued)