The radon test results came back from the lab this morning, showing a level of 4.7 picocuries per liter in the basement, which is just above the EPA's recommended action limit of 4.0. I'm a bit concerned, especially since the kids spend so much time down there playing video games. The report suggests installing a mitigation system to vent the soil gases away from the house. I'm researching contractors now to get this fixed as soon as possible. radon test results 8