The CSB is publishing this Case Study to help companies understand the hazards associated with static-accumulating flammable liquids that can form ignitable vapor-air mixtures inside storage tanks. In addition, the CSB wants to urge companies to take extra precautions to prevent explosions and fires like the one at Barton. This Case Study also examines industry Material Safety Data Sheet (MSDS) hazard communication practices and makes recommendations to ensure that MSDSs identify these hazards and outline appropriate precautions.