Which of the following locations is NOT appropriate for a radon test?

Testing for radon is primarily focused on areas where people spend time within a building, particularly at or below ground level since radon is a colorless, odorless gas that can enter structures from the ground.

The location identified as inappropriate for a radon test is a sealed attic because it is generally not a space that is occupied regularly by residents. Radon testing is most effective in areas such as basements or living spaces where individuals spend a significant amount of time, as this provides a more accurate representation of long-term exposure. Radon concentrations can vary greatly from one area of a building to another, and the sealed attic, which typically has limited air exchange with the living spaces below, would not yield reliable data about potential radon exposure for occupants.

In contrast, testing outside the building or in an occupied family room would not only provide more relevant data regarding exposure but also help determine the effectiveness of any radon mitigation systems in place. Similarly, a basement is a prime location for testing due to its proximity to the ground and common issues related to radon entry.