What does emanation transport specifically refer to?

The concept of emanation transport specifically relates to the process by which radon gas is released from building materials. This terminology is commonly used in the context of radon measurement and mitigation, indicating how radon atoms escape from solid materials, such as concrete or soil, into the surrounding air.

In this case, option B accurately captures the essence of emanation transport, as it highlights the source of radon (building materials) and its transition into a gaseous state, which can then affect indoor air quality and potentially lead to health risks. Understanding this process is crucial for radon measurement technicians, as it helps in identifying potential sources of radon exposure in residential and commercial properties.