DSM Radon company is extremely knowledgeable and very professional. It's not an easy task what they did to resolve our radon. I was highly impressed with the precision and amount of hard work that went into it. Clay thoroughly explained everything (before and after) and cleaned up everywhere afterward. It is so nice to have the peace of mind now for our family - having the radon issue resolved. I've already recommended their services to my neighbors and co-workers. Thanks again, Jeremy and Clay!