Assertion: radon's level | /r/HasProperty | about 1 pci/l
Facets:
value: typically
type: DEGREE
Source sentences:
text: "Normal" indoor levels in the U.S 14 are typically about 1 pCi/l (using the EPA pCi/l, not the real pCi/l) which is 10 times greater than the outdoor concentrations of about 0.15 pCi/l.