HAMMOND | Environmental investigators have not nailed down the source of glittery material that appeared this weekend in Hammond's Robertsdale neighborhood.
Dan Goldblatt, a spokesman for the Indiana Department of Environmental Management, said investigators think the material came from a mobile source. He said officials do not think the source of the material is land-based because of wind patterns.
The material previously was spotted in the same neighborhood earlier this summer. At the time, state investigators said initial reports indicated the material was kish graphite, which is used in the steel making process.
Goldblatt said investigators do not think the material found this weekend is kish graphite because it is much heavier and magnetic.
Ron Novak, director of the Hammond Department of Environmental Management, said complaints about the glittery material have become common since June.