radon retest 2

https://writehollow.com/s/3QtqImEVHq_8xWwEdKPkV

If your first radon test result was over 4 pCi/L, a radon retest is strongly recommended to confirm the high levels before you commit to mitigation. Short-term tests placed in the lowest lived-in level for at least 48 hours give a quick snapshot, while long-term tests delivered over 90 days provide a more accurate annual average. For reliable results, keep windows and doors closed as much as possible during testing, except for normal entry and exit.