local radon mitigation crews 5
https://ace-wiki.win/index.php/Why_Local_Radon_Mitigation_Crews_Are_Essential_for_York_County_Homes
We called in a local radon mitigation crew after our test showed high levels. They walked us through the whole process, sealed the crawlspace vents, and installed a vent pipe with a quiet fan that runs constantly. Now the monitor stays well under 2 pCi/L, and the house feels drier too.