radon retest 12

https://foxtrot-wiki.win/index.php/Understanding_Radon_in_Festus,_MO:_What_Homeowners_Should_Know

Radon retest is a follow-up measurement to see if radon levels in your home have changed since the initial test. You might do this after mitigation work, or if a previous test was borderline. It's simple—run the test again in the lowest lived-in level. This helps confirm that any fixes actually worked, or alerts you to new issues. Consistent testing keeps your family safe from this invisible gas.