Environmental

Radon is a naturally occurring radioactive gas that can accumulate in buildings. The EPA action level for radon that triggers mitigation is:

A2 pCi/L
B4 pCi/L✓ Correct
C6 pCi/L
D10 pCi/L

Explanation

The EPA recommends mitigation when radon levels reach or exceed 4 picocuries per liter (pCi/L). This threshold applies nationally including Rhode Island properties.

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