Lifetime Radon Mitigation Oshkosh is the Fox Valley's premier radon mitigation and radon testing contractor. With over 21 years in business and more than 35 years of combined radon mitigation experience, Lifetime Radon Mitigation in Oshkosh has seen virtually every type of radon problem imaginable. In addition to their unparalleled industry experience, Lifetime Radon offers a lifetime guarantee on their workmanship, the most competitive fan warranty in the business, and extremely competitive pricing on their custom built systems.