We moved to a new house recently and are having some major landscaping work done in the backyard (removing/relocating a number of boulders, flattening out one area of the yard and filling another in, etc.).
Before we moved in, we did a radon test and the results came back very low (I think it was 0.4 pCi/L). However, I've read that the amount of radon in your home is very specific to your individual house (e.g., your neighbor's house could have much higher/lower radon that yours does).
Therefore, I was wondering if big changes to the surrounding landscape could cause the radon levels to change significantly. Should we do another radon test after the landscaping work is complete?