Quality Assurance & Quality Control
Introduction to Radon Mitigation
Worker Health & Safety
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Post-Mitigation Testing

Post-mitigation testing should be conducted under standard protocols.  Additional protocols include the following considerations:

  • Conduct the test in the same location as the pre-mitigation test(s) when possible.
  • Conduct  an additional post-mitigation test in the lowest livable area above any crawlspace that is structurally isolated from the occupiable or tested rooms; and in the lowest livable area above each other unique structural area.
  • Post-mitigation tests should be initiated no sooner than 24 hours and no more than 30 days after a system has been installed and operational.
  • Systems should be retested every 2 years.