Quote:
Originally Posted by Erick Estrada
It fluctuates daily with barometric pressure variances and as long as the average is below 200 you are okay. We have had peak measurements of 887 Bq/m3. Clearly we have to get something done with a kid sleeping downstairs but it's one of those things where I wouldn't have even checked if the kind fella at work didn't ask if I wanted to give it a try.
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These levels are extremely dangerous for everyone living in the house and you should have it mitigated asap. It is a lot cheaper and simpler than people are led to believe. A couple of holes drilled in the basement floor and proper exhaust piping out; that's all it takes. If you need a reference for a good honest installer, PM me.
For the measurement device,
this one is universally recommended by professionals. It used to be called Corentium and it was made in Norway. Now I see that the name has changed to Airthings, but it looks to be the same tester.