In this Jan. 13, 2014, photo, Al Jones of the West Virginia department of General Services tests the water in the State Capitol in Charleston, W.Va. CREDIT: AP Photo/Steve Helber Nearly four months after a coal-cleaning chemical mixture spilled into the Elk River and contaminated the water supply for 300,000 West Virginia residents, the Environmental Protection Agency will test the chemical in air and set a corresponding safety limit for breathing the fumes.