Thanks to Bryan Haywood over at SAFTENG.net for pointing out this recently published Chemical Advisory for the safe storage, handling and management of ammonium nitrate. This is a joint publication of the US Environmental Protection Agency, the Occupational Safety and Health Administration and the Bureau of Alcohol, Tobacco, Firearms and Explosives.
The document provides a very good discussion about the hazards that are associated with the storage and handling of ammonium nitrate. It also provides an extensive bibliography of sources of additional information. This document should be read, studied and implemented by anyone that stores ammonium nitrate, will potentially respond to a fire or other incident involving ammonium nitrate and any legislators wishing to take action to prevent future accidents like the West Fertilizer explosion.