I'm buying a house in Ames. I had a radon test done as part of the inspection, which came back as 4.3. 4.0 is the level where mitigation is recommended. My realtor is telling me that because it's 'borderline', we can't ask the seller to install/pay for mitigation. Everything I hear (online and from friends) is that this is not the case and seller almost always pays for it. Anyone have any experience with this, or know if it is correct? Unless bringing it up gives the seller a chance to back out I don't see the harm in requesting it done.