Which of the following is considered a non-compliance item in radon mitigation?

In the context of radon mitigation, non-compliance refers to situations where the mitigation system does not adhere to established guidelines and standards designed to ensure safety and performance. Each of the specified issues—having a fan in occupiable space, lack of viewable fan monitors, and exhaust being less than 10 feet above the ground—represents potential violations of those standards.

Having a fan located in a space that is frequently occupied poses health risks due to potential noise and exposure to minor vibrations, which may affect the comfort and livability of the area. This is why there are specific guidelines recommending the placement of fans in non-occupiable spaces.

The absence of viewable fan monitors represents another compliance issue. Fan monitors are critical for indicating the operational status of the radon mitigation system. Homeowners and occupants need to be able to observe whether the system is functioning effectively to ensure ongoing protection from radon exposure.

Finally, if the exhaust of the radon mitigation system is less than 10 feet above the ground, it could pose a risk of inhalation of radon gas or other contaminants by individuals in outdoor spaces, particularly if the exhaust disperses pollutants back toward the structure or into areas where people gather.

Together, these scenarios reflect a comprehensive understanding