radon pipe leak 3

https://radonlevelsstlouisworld.quantlynix.com/posts/what-homeowners-should-know-about-radon-levels-st-louis

After the basement remodel, we noticed a faint mustiness near the sump pump; a subsequent radon pipe leak test confirmed levels had spiked from 2.5 to 7.1 pCi/L, so we had to seal the cracked joint where the exhaust pipe connects to the exterior vent.