Waco, TX – The Chemical Safety Board is calling on OSHA to address the hazards posed by fertilizer grade ammonium nitrate.

This comes in light of the chemical explosion that killed 15 people and injured more than 260 others on April 17, 2013, at West Fertilizer Co. in West, TX.

CSB issued recommendations for OSHA and the Environmental Protection Agency as part of a final report that was approved Jan. 28. CSB investigators listed a series of shortcomings in regulation, emergency planning and incident response that contributed to the scope of the tragedy. The blast took place after about 30 tons of fertilizer grade ammonium nitrate, which were stored in combustible plywood bins, overheated in a fire at the facility.

OSHA does not cover fertilizer grade ammonium nitrate in its Process Safety Management Standard or clearly identify the chemical in its Explosives and Blasting Agents Standard, CSB said. The agency recommended that OSHA revise either standard to address safe storage of fertilizer grade ammonium nitrate, construction materials and fire suppression systems. Investigators also recommended that existing chemical facilities be required to replace bins made of wood and other combustible materials with non-combustible materials.