Normal Radon Graph #1
This graph shows the proverbial normal,
repeating diurnal curve. We see this uniform a curve in less than
5% of our testing. The change in radon levels is primarily caused
by the difference in soil gas pressure to house air pressure. The
stack pressure of the house fluctuates as the inside outside
temperature differential changes. The barometric pressure changes,
wind, and the soil moisture can also change the levels of radon.