From what I understand, outside it's no big deal. Inside it does get trapped. The highest level was a 9.8 and the lowest was a 3.5 I think. Once you put the system in, it takes out 99% of it. One guy had similar readings and he said with his system the readings went down to 1. The EPA states if it's over 4 then you should have a system. Herriman is a 50/50 ratio of houses that need a system and houses that don't. With the highest being 89 I think it was. So our test wasn't crazy high and a system will take care of it. My wife is too attached to this house to let it go Kevin. Especially when she knows a system can take pretty much all of it out. And the garage is the best out of all the houses to put a lift in. And since she threw out my acre property criteria, it's one of the best. I think the main reason they don't want to pay for it is due to them coming down a little, agreeing to pay all closing costs, and the house is priced awesome for the area and size. My wife and I are just reading a bunch if things that are for both sides and it's hard to know who is the best to go with to decide if the system is absolutely needed with our numbers. Of course with our health at risk I don't think it really matters what any article says, we will have one put in no matter what.