Post-Mitigation Testing Flashcards
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Read the first 6 Post-Mitigation Testing flashcards as text
How soon after activating an active radon mitigation system should post-mitigation testing begin?
Answer: At least 24 hours after activation, with minimum 48-hour test
Post-mitigation testing should begin at least 24 hours after system activation to allow conditions to stabilize, with a minimum test duration of 48 hours.
What is a U-tube manometer used for in radon mitigation?
Answer: To measure the pressure differential created by the mitigation system
A U-tube manometer, installed on the radon vent pipe, provides a visual indication that the mitigation fan is operating by displaying the pressure differential.
What is the recommended placement for a post-mitigation radon test device?
Answer: Lowest livable area, at least 20 inches above the floor
Post-mitigation tests should be placed in the lowest livable area, 20 inches or more above the floor, away from exterior walls and windows.
What does a failing post-mitigation test indicate?
Answer: The system may need additional suction points or sealing
A post-mitigation test showing radon at or above 4 pCi/L indicates the system needs optimization: additional suction points, better sealing, or a more powerful fan.
How often should post-mitigation radon levels be retested?
Answer: Every 2 years, or after significant building changes
The EPA recommends retesting every 2 years, after significant renovations, HVAC changes, or if the mitigation system is modified.
What type of radon test provides the most accurate long-term average?
Answer: Alpha track detector deployed for 91 days to 1 year
Alpha track detectors deployed for 91 days to 1 year provide the most accurate long-term average radon concentration, accounting for seasonal and daily fluctuations.
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