The U.S. Environmental Protection Agency has opened a public-comment period on the proposed cleanup plan for an area of the NIPSCO Bailly Generating Facility in Chesterton, as the Indiana Dunes National Park has been impacted in the area by a solid waste management unit. The unit was used in the 1960s and 1970s to dispose of ash created from burning coal to generate electricity. The ash is buried approximately 25 feet underground, but contains various hazardous metals, including boron, which officials say is the primary concern in the national park. Public comments are being accepted now through August 19th. Those interested can view a pre-recorded presentation and comment on the proposed cleanup plan.