BOISE, Idaho (AP) — The Environmental Protection Agency ordered a chemical company to take steps to halt poisonous, explosive gas that's leaking from a Superfund site in southeastern Idaho after the state determined it's an "urgent public health hazard."
Philadelphia-based FMC Corp. operated a plant until 2001 on the Eastern Michaud Flats area west of Pocatello on the Shoshone-Bannock Indian Reservation.
The site, about a mile from Pocatello Airport's passenger terminal, has been on a federal list of America's most-contaminated places since 1990.
A decade after the FMC plant was shuttered, however, a capped pond is now leaking phosphine gas, a severe respiratory irritant that smells like rotten fish.
This month, Idaho concluded burping phosphine gas from FMC's Pond 15S "is an urgent public health hazard for anyone on site."
Copyright 2010 The Associated Press.