The 1,4 dioxane plume emanating from the old Gelman Sciences Facility on Wagner Road in Scio Township has caused environmental damage and remains a threat to public health. In this week's "Issues of the Environment," WEMU's David Fair has a conversation with Roger Rayle, who is both chair of the Coalition for Action on Remediation of Dioxane ( CARD ) and Scio Residents for Safe Water ( SRSW ), about the ongoing efforts to remediate the dioxane plume.