The US Chemical Safety and Hazard Investigation Board (CSB) has released a new safety video about the fire, explosions, and toxic hydrofluoric acid (HF) release that occurred at the Philadelphia Energy Solutions (PES) refinery in Philadelphia, Pennsylvania, in June 2019. The incident caused the release of over 2.2 tonnes of highly toxic HF, launched a 17 tonne vessel fragment off-site, and resulted in an estimated property damage loss of $750 million....