radon in basement 6

https://direct-wiki.win/index.php/Radon_O%27Fallon_IL:_What_Homeowners_in_Metro_East_Illinois_Need_to_Know

We finally tested for radon in the basement after hearing about health risks from a neighbor. The test kit sat in the corner for three days, and when we sent it in, the results showed levels above the EPA action limit. Now we're researching mitigation systems to vent the gas out safely.