The vent pipe leaves out the side of your house and also approximately the eaves, where the radon gas spreads harmlessly into the atmosphere. If degrees are still high, consider setting up a radon mitigation system on your own or employ a pro. Consider taking steps to reduce radon levels in your residence if a 2nd test signs up above 4 pCi/L. You should take actions to lower the radon level as quickly as possible if the radon levels in your house exceed 4 picocuries per liter. When screening, carefully follow all guidelines on the kit.