I did a radon test recently and the EPA protocol average was 4.8. I purchased the Sun 1027 in January 2008 and it was calibrated. I also did a cross check with 3 monitors at my home and they all were within the same readings.
The home that I tested had a radon test with a similar monitor done about 18 months ago and this one came back at 2.7.
There are some arguments between the buyer, seller and agents on the next step as my client wants mitigation and the seller says I had it tested and he is not paying for mitigation.
It is a large home and mitigation would be more then the norm.
I told them during a short term test conditions can change and the EPA recommends testing every 2 years.
I also recommended a mitigation specialist to determine if there is a need for a system. I would think a long term test would be needed.
What are your thoughts and how would you handle the above situation?