"Scio Township resident Roger Rayle is beginning his 21st year as a citizen volunteer watching over the issue of the expanding Pall-Gelman 1,4-dioxane plume."

"But now he and other Ann Arbor area residents contend that some of the contamination is expanding northward. This is a potential danger to Ann Arbor’s primary water source, and thus threatens health, safety and livelihood of residents.

“1,4-dioxane is fully miscible and goes wherever the groundwater goes,” Rayle said.

The hard evidence that the plume is expanding includes recent groundwater sampling and Pall’s latest plume maps. "

Donna Iadipaolo reports for the Ann Arbor Journal November 20, 2013. [2]