[cabmandone]

https://www.amazon.com/The-Original-Radon-Sump-Dome/dp/B00A422NV8/ref=asc_df_B00A422NV8/?tag=hyprod-20&linkCode=df0&hvadid=193994427542&hvpos=&hvnetw=g&hvrand=11353125936473712210&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9015981&hvtargid=pla-313394905846&psc=1

Once you've done that, epoxy the saw cuts in the floor. Saw cuts, cracks in the concrete and the sump pit are the easiest paths for radon to enter.