Radon is a colorless, odorless radioactive gas which accumulates through natural decomposition of radium and uranium. Radon can enter buildings through imperfections in the foundations or basements including sewer leaks, sump pumps, drains, floor cracks and bare soil. Radon can accumulate in concentrations that could create hazardous conditions for the lungs including forms of lung cancer. Radon testing kits can be purchased from any home improvement store. DeLisle can assist you in sampling.