The Gelman Sciences 1,4 dioxane plume continues to spread and threaten the health of groundwater in Scio Township and Ann Arbor. Recent reports indicate there is now a potential threat of exposure through wet basements. With spring and the usual basement flooding that occurs in portions of the area, it is a cause for concern. University of Michigan toxicologist and environmental professor, Dr. Rita Loch-Caruso, is a co-author of a study identifying the problems. She joined WEMU's David Fair with the latest information.