The Environmental Protection Agency announced an agreement with Gelman Sciences on October 23 covering contaminated soil and groundwater near Ann Arbor and Scio Township, Michigan. The administrative settlement assigns immediate response work and longer-term planning duties under federal oversight.

The company must investigate contamination and compare possible remedies, remove contaminated soil from a former burn-pit area and increase groundwater extraction and treatment in the eastern plume. Additional monitoring wells are intended to better establish how far the 1,4-dioxane contamination extends.

The agreement also provides funding so community groups can obtain independent technical advice on reports and proposed actions. Existing requirements under a Michigan consent judgment remain in effect, including monitoring, treatment and annual sampling of residential wells.

EPA traces the contamination to medical-filter manufacturing between 1963 and 1986 and added the property to the Superfund priority list in March 2026. The new agreement advances investigation and containment; it does not establish that the aquifer has been restored or that the cleanup is complete.