How do you get rid of radon gas in a basement?

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How do you lower high radon levels in a basement?

Uma Parekh Published: May 22, 2020, 11:54 a.m.Last updated: Sept. 14, 2020, 1:17 p.m.

I have a house to sell, I already have contract. we stayed 13 years in that home with full finished basement. In Radon test result is 7.5pCi/L . What should  we do and how much it will cost? Can you please suggest us what should be done. House is in very good condition. 

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