You may be aksing why I posted this in the PSM/RMP Section; simple, all of the incidents in this alert occurred in a chemical processing area, even though they may have not been covered by PSM/RMP, they no less occurred in processing areas! In response to the findings from an NTSB investigation, PHMSA is issuing this safety advisory guidance to all entities responsible for unloading or transloading of heated hazardous material from a rail tank car.