We just had an incident at work with the nitric acid tanks, maintenance was cleaning out the remainder of the tank with shop vac that someone must've used bleach in, yeah yellow gas cloud out the back and shut down production for a day.
I was a Millwright in a steel mill and our finishing department used about five different types of acid. My buddy and I were inside the shot blasting cabinets rebuilding the shot units and the fumes were getting terrible. I told my buddy we gotta get out of here. By time we climbed out it felt like a circus fat lady was laying on my chest. 30 of us were sent to the dispensary where we were given throat lozenges to coat our throats and we were told to keep walking till we were taken to the hospital for chest ex-rays. It took about four hours to breathe normally again.
