1-4 dioxane

The U.S. Environmental Protection Agency is proposing a the plume of 1,4-dioxane spreading from the site of the former Gelman Sciences facility near Ann Arbor be added to the federal Superfund list.

Local officials and advocates have asked that the site be included on the National Priorities List to bring more resources to bear on site monitoring and remediation.

The U.S. EPA says a preliminary assessment of the 1,4 dioxane contamination spreading in the city of Ann Arbor's groundwater shows the site has a "good chance of being listed under the federal government's Superfund program.

A newly published study suggests as the polluted groundwater moves east, it gets closer to the surface. It suggests regulators should monitor for vapors in basements in those areas.

The ruling means Gelman Sciences is no longer bound by a consent judgment to accelerate treatment of contaminated groundwater and soil.

More residential wells are contaminated with dioxane outside Ann Arbor, according to recent tests. Federal environmental officials classify the chemical as likely to cause cancer.

The plume of 1,4 dioxane in Washtenaw County's groundwater is one step closer to getting federal help with its cleanup. The Department of Environment,…

Gelman Sciences wants a Washtenaw County judge to pause court proceedings in the 1-4 dioxane pollution cleanup case.Gelman is responsible for a plume of…