RMS Post-Mitigation Testing

Question 1

How soon after activating an active radon mitigation system should post-mitigation testing begin?

Accepted Answer

At least 24 hours after activation, with minimum 48-hour test

Answer

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.

Question 2

What is a U-tube manometer used for in radon mitigation?

Accepted Answer

To measure the pressure differential created by the mitigation system

Answer

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.

Question 3

What is the recommended placement for a post-mitigation radon test device?

Accepted Answer

Lowest livable area, at least 20 inches above the floor

Answer

Post-mitigation tests should be placed in the lowest livable area, 20 inches or more above the floor, away from exterior walls and windows.

Question 4

What does a failing post-mitigation test indicate?

Accepted Answer

The system may need additional suction points or sealing

Answer

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.

Question 5

How often should post-mitigation radon levels be retested?

Accepted Answer

Every 2 years, or after significant building changes

Answer

The EPA recommends retesting every 2 years, after significant renovations, HVAC changes, or if the mitigation system is modified.

(RMS) Radon Mitigation Specialist Practice Test

(RMS) Radon Mitigation Specialist Practice Test

RMS Post-Mitigation Testing