The U.S. Chemical Safety Board ("CSB") last night held a public meeting in connection with a February 18, 2015, explosion of an electrostatic precipitator at a refinery in Torrance, California. After hearing preliminary findings from the investigation team, the CSB considered comments from the Torrance Refinery Action Alliance, a representative of the employer, and a panel of experts who discussed California's new process safety management ("PSM") reforms for the refining industry. The PSM panel included representatives from Cal/OSHA, Cal/EPA, the United Steelworkers, the Western States Petroleum Association, and the Blue Green Alliance. The CSB Board raised the potential for a catastrophic release of modified hydrofluoric acid ("MHF") in connection with the Torrance incident. MHF and PSM reform were both discussed in a variety of contexts throughout the night....