What are the two primary methods of monitoring worker exposure?

The two primary methods of monitoring worker exposure to radon are focused on specific quantitative measurements that provide reliable data regarding the level of radon exposure. Calculating Working Level Months (WLM) and measuring the concentration of radon progeny in picocuries per liter per day (pCi/l/days) are standard practices in the radon industry.

WLM is a unit that relates the exposure to radon gas and its decay products over time, emphasizing the potential health risks associated with different levels of exposure. Similarly, pCi/l/days quantifies the concentration of radon in the air, providing an essential metric for assessing worker exposure levels. These calculations are critical for understanding the risks and implementing appropriate safety measures.

Using air quality sensors and personal interviews, evaluating equipment performance and estimating exposure, and conducting surveys and health screenings serve important roles in various contexts but do not directly provide the rigorous and quantitative monitoring necessary for effective radon exposure assessment in workplaces. The precision and focus of methodologies in option C make it particularly relevant to radon mitigation and monitoring practices.