Checking for radon during lease

[Levi Perl]

I finished a rehab on a SFH in Dec 2024 and found a renter last week. I was aware that there is a radon mitigation fan in the basement of the SFH, but I didn't have a chance to check if it is in working order during the rehab, nor did I run a radon test. At this time, I regret not being able to do all of that during the rehab and want to 1. Make sure the radon mitigation fan is working and 2. Run a test at the property for radon levels once the fan is in working order. I will obviously need the tenants permission to do all of that. How do I go about doing all of that without potentially getting the tenants upset for "exposing them to hazardous gases"? Keep in mind they have only been there for a few days... and I'm quite sure the radon fan is running.
Thanks