Solved: Youre a home inspector, and you find radon-222 activity of 23 pCi/L in the air
Chapter 38, Problem 49(choose chapter or problem)
Youre a home inspector, and you find radon-222 activity of 23 pCi/L in the air inside a house, well above the EPAs action limit of 4 pCi/L. If radon infiltration were stopped but there were no significant ventilation, how long would it take for the radon activity to drop below the action limit?
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