The U.S. Environmental Protection Agency (EPA) conducted a radiation survey of public and private buildings in the vicinity of mineral mining areas to establish the use, if any, of radioactive mineral waste materials in any phase of construction. The survey was conducted in two phases. The initial phase utilized a mobile van equipped with radiation detection instrumentation to survey radioactive levels in the vicinity of the structures of interest. Areas or structures which indicated higher than normal background levels of radiation were recorded for further investigation. The second phase of the survey involved detailed on-site radiation studies to locate and identify the source of radioactivity and to make appropriate radiation measurements inside the structures to provide an assessment of health impacts.