Referring to the accompanying figure , a 90-day look at continuous monitor data from a home teetering on the edge of being hazardous , the variation seen is fairly typical . Such wild swings can be puzzling . However , suppliers of CRMs don ’ t want their customers calling in a radon professional over a 1-day spike
. Some homes only temporarily read high during certain seasons and in certain weather patterns . Conversely , some high-reading homes temporarily test low
.
Understanding long-term multi-seasonal variation through a graphic is important to understanding one ’ s risk
.
It is somewhat amazing that we can measure radon at all . There is so very little of it , yet its consequences can be life altering . There are only about 1 . 5 x 10 5 atoms of radon in a liter of outdoor air . This compares with 2. 5 x 10 22 air molecules in a liter of air . Expressed another way , radon amounts to 1 of every
100 million billion atoms in air . However , when that one atom decays, it