Assertion: radon's level | /r/HasProperty | 0.4 pci/l
Facets:
Source sentences:
text: The average level of radon in outdoor air is 0.4 pCi/L (pico Curies per Liter), and the average level in indoor air is 1.3 pCi/L.
text: The average outdoor level of radon is 0.4 pCi/L.
text: The average outdoor level is about 0.4 pCi/L.
text: The average outdoor level of radon is 0.4 pCi/L, and the average indoor radon level is estimated to be about 1.3 pCi/L. Generally, a level below 4 pCi