When radiation readings are included in a National Priorities List ("Superfund") site data package, public health assessors are sometimes uncertain about how to evaluate the data. For some health assessors, there can be a gap in their knowledge about the nature of radioactivity, their knowledge about how to accurately measure radioactive substances in environmental media, or how to determine the dose of radioactivity to which community residents were exposed. This gap makes it difficult for health assessors to knowledgeably eval ...  [more]