Environmental
What is the EPA's action level for radon gas in a building that triggers mitigation?
A2 pCi/L
B4 pCi/L✓ Correct
C8 pCi/L
D10 pCi/L
Explanation
The EPA recommends radon mitigation when indoor levels reach 4 picocuries per liter (pCi/L) or higher. Missouri has areas with elevated radon and testing is recommended.
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