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

Immediately upon activation

Answer

One year after installation

Answer

Testing is not required

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

To measure radon levels directly

Answer

To test water pressure in plumbing

Answer

To measure exhaust air temperature

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

On the roof

Answer

Directly on the mitigation fan

Answer

In the attic

Question 4

What does a failing post-mitigation test indicate?

Accepted Answer

The system may need additional suction points or sealing

Answer

The building is permanently unsafe

Answer

Radon mitigation is impossible for this building

Answer

The test device was defective

Question 5

How often should post-mitigation radon levels be retested?

Accepted Answer

Every 2 years, or after significant building changes

Answer

Never after initial test

Answer

Every month

Answer

Only when selling the property

Question 6

What type of radon test provides the most accurate long-term average?

Accepted Answer

Alpha track detector deployed for 91 days to 1 year

Answer

A 48-hour charcoal canister test

Answer

A grab sample collected in 5 minutes

Answer

An electronic radon detector running for 4 hours