Environmental
Radon is a naturally occurring radioactive gas that enters buildings through foundation cracks. The EPA action level at which mitigation is recommended is:
A2 pCi/L
B4 pCi/L✓ Correct
C6 pCi/L
D10 pCi/L
Explanation
The EPA recommends mitigating radon when levels reach 4 pCi/L (picocuries per liter) or higher. Radon is the second leading cause of lung cancer in the United States.
Related Arkansas Environmental Questions
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