RMS Post-Mitigation Testing 3

Question 1

What is the primary purpose of performing a post-mitigation test rather than relying on system diagnostics alone?

Accepted Answer

To verify that actual indoor air radon levels have been reduced to acceptable concentrations

Answer

System diagnostics confirm the fan and piping are functioning, but only an air quality test can verify that radon concentrations in breathing air have been reduced.

Question 2

When interpreting post-mitigation short-term test results, what factor can most significantly skew the reading higher than normal long-term averages?

Accepted Answer

Elevated wind speeds and low outdoor temperatures

Answer

High wind and cold temperatures increase the stack effect in homes, which can draw more radon from the soil, producing higher-than-average short-term readings.

Question 3

A mitigator places a post-mitigation test device in a storage closet in the basement. Why is this placement improper?

Accepted Answer

The device must be placed in a frequently occupied area of the lowest livable level

Answer

Test devices must be placed in frequently occupied spaces because the purpose is to assess actual human exposure, not radon levels in unoccupied storage areas.

Question 4

After a successful post-mitigation test, how long does EPA recommend before conducting a routine follow-up test?

Accepted Answer

Every 2 years

Answer

EPA recommends retesting every two years after a successful mitigation to ensure the system continues to perform adequately over time.

Question 5

Which condition would invalidate a post-mitigation short-term radon test result?

Accepted Answer

A window was opened for 3 hours during the middle of the test period

Answer

Opening windows or doors during a short-term test violates closed-house conditions and introduces outdoor air that dilutes radon, making the result invalid.

(RMS) Radon Mitigation Specialist Practice Test

(RMS) Radon Mitigation Specialist Practice Test

RMS Post-Mitigation Testing 3