This report includes test results from a radon-testing device that records the levels of radon gas over a short term test period. The actual radon levels in the home may vary depending on many factors including, time, temperature, season, barometric pressure, ventilation, and other factors.
There is currently a radon mitigation system installed. The system was inspected and appeared to be in proper working condition. The vapor barrier was installed and the installed manometer indicated that a negative pressure was being applied. Radon levels in a home should not be above 4.0 pCi/l when a mitigation system is properly installed and operating correctly. Consulting with a professional radon mitigation specialist is recommended to evaluate the system and determine if repairs or upgrades should be made to lower radon levels in the home.
EPA recommends that you should fix your home if the radon level is equal to or greater than 4.0 pCi/L (the Action Level). Homes should be checked every few years to make sure homes are lower than the 4pCi/L level set by the EPA, whether or not you have a mitigation system. More information can be found directly at the EPA's website.