The venting was due to a relief valve operating to prevent overpressure of a liquid ammonia tank.

The new ammonia tank will replace an empty tank during an EVA.

On May 25, 2008, a tornado ripped through southern Butler County, and destroyed the Sinclair Elevator, ripping apart grain bins and throwing anhydrous ammonia tanks into fields.

The city was evacuated on April 17, 2009, when a large fire at North Star Foods, a poultry processing plant, threatened anhydrous ammonia tanks.

Hazardous material technicians from the Indianapolis Fire Department reported that an open valve in a 1,000-gallon anhydrous ammonia tank was the source of the leak.

Upon arrival at the station, Discoverys crew performed three spacewalks to replace an empty ammonia tank for the ISS Thermal Control System.

Mr. Sweeney said the ammonia tank was leaking but that the leak was under control.

But as the catwalk began to shatter from tension and brittleness the Posleen let loose a stream of railgun rounds then fell screaming into the ammonia tank.

He was hired as a hydroblaster at the Monsanto chemical plant in Pensacola, Fla. where he would be lowered into large ammonia tanks to clean them.

The ATA contains two flexible, chambers incorporated into its ammonia tanks that expand as pressurized nitrogen expels liquid ammonia out of them.