Which method is NOT recommended for employee exposure reduction to radon?

Using personal protective equipment (PPE) is generally not considered a recommended method for reducing employee exposure to radon. The primary reason for this is that radon is a gas that can permeate through materials, making it difficult for PPE to effectively provide a barrier against inhalation or exposure. While PPE can be beneficial in various workplace environments for physical hazards or chemical exposures, it is less effective for airborne contaminants like radon gas.

On the other hand, periodic retesting of work areas is crucial for monitoring radon levels, allowing for timely mitigation and ensuring that exposure limits are maintained. Ventilating with outside air is an effective strategy, as increasing air exchange can dilute radon concentrations in the indoor environment. Limiting exposure times can also reduce the risk, since the less time someone spends in a radon-rich environment, the lower their overall exposure will be. These strategies target the source and environment of radon effectively, which is why they are preferred methods for minimizing exposure.