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1,4 Dioxane and Pall Life Sciences/Gelman Sciences site

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MDEQ News Release - Feb. 6, 2019 - The Michigan Department of Environmental Quality (MDEQ) has scheduled additional sampling of the Allen Creek Drain Storm Sewer to Help Asses Local Water Quality Concerns. 

Background ​​​

Groundwater in parts of Washtenaw County, including some areas in the City of Ann Arbor and Ann Arbor and Scio township, is polluted with the industrial solvent 1,4-dioxane due to Gelman Sciences', now Pall Life Sciences (PLS), improper disposal of wastewater containing the chemical between 1966 and 1986. As a result of their actions, the chemical seeped through soil and rock layers into the groundwater and has since spread.

It is important to note, however, that 1,4-Dioxane has never been detected to date in Ann Arbor's drinking water supply. 

The City of Ann Arbor City is currently engaged with neighboring communities, Washtenaw County, and state and federal agencies to find solutions and perform clean up. On November 14, 2016, the City Attorney's Office filed a motion in Washtenaw County Circuit Court to intervene in the Gelman dioxane plume case in order to push for better cleanup and more monitoring of the plume.  

The MDEQ encourages property owners with concerns about potential dioxane contamination to contact Dan Hamel, the MDEQ's project manager for the Gelman plume site, by calling 517.745.6595 or emailing



Michigan Department of Environmental Quality Remediation and Redevelopment Division 

Dan Hamel, Project Manager
Jackson District Office