(CNN) - The fertilizer plant that blew up in Texas last week warned state and local officials but not federal agencies that it had 270 tons of highly volatile ammonium nitrate on site, according to regulatory records.
The April 17 fire and explosion at West Fertilizer Co. killed 14 people and devastated the small town of West, Texas. Investigators have said they're not sure how much ammonium nitrate was actually on site at the time of the explosion, however, since plant records were destroyed in the blast.
The company sold ammonium nitrate and anhydrous ammonia, both commonly used as fertilizers. It had notified state and local emergency management officials of its stock of both in its most recent declaration of hazardous chemicals, filed in February.