"Good chance" of Superfund status for Ann Arbor's dioxane plume

This is a great summary about the history of the cleanup from the AADL: History of the Pall-Gelman Dioxane Groundwater Contamination Cleanup

Gelman Sciences was sold to the Pall Corporation in 1997, so most news coverage now calls it the “Pall Corp. clean-up” even though dioxane use was discontinued while Gelman still owned the company. Also, Pall was acquired by the Danaher Corporation in 2015 though the Pall name was retained.