I had two houses that failed the radon test (above 4.0). Atlantic Radon responded quickly to both residences, did their own computer measurement, and installed their radon mitigation, all at a very reasonable price. The results were excellent, with one house getting a 0.7 average and the other a 0.9. I recommend them highly.
Atlantic Radon installed an active radon mitigation system and also a backup battery sump pump. Service was prompt, and very professional. The results were fantastic. Not only is the radon level down to just about 1, the outside work looks unobtrusive and clean. We'd highly recommend them.