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.