For how long is a diffusion barrier ACD typically deployed?

• A. 2-3 days
• B. 5-7 days
• C. 7-10 days
• D. 10-14 days

Answer: (B)

The duration for deploying a diffusion barrier ACD (Active Continuous Dosimeter) is typically 5-7 days. This time frame is chosen to allow for accurate measurement of radon levels over a meaningful period without capturing transient fluctuations. A deployment of 5-7 days balances the need for capturing a representative radon concentration while ensuring that the results are not influenced by temporary spikes related to weather changes or other environmental factors. Additionally, this duration is long enough to gather sufficient data that can be reliably analyzed to understand average radon exposure in a residential or commercial setting. This timeframe is consistent with standard radon measurement protocols to assess radon concentration and provide actionable data to homeowners or property managers.