Assertion: radon's level | /r/CapableOf | mitigate below 2.0 pci/l.
Facets:
Source sentences:
text: The U.S. EPA's radon action level is 4.0 pCi/L, the preferred concentration is 2.0 pCi/L, and the ideal level is the average outdoor level of 0.4 pCi/L, though it is challenging to mitigate below 2.0 pCi/L.