don't forget the ammonia fumes that almost choke you, they certainly clear out your sinuses & asbestos its everywhere, if you look at the pipes they all have a red triangle on & they are full of footprints & tube marks
with a spanner when i was on there we where asked to strip a hanger under the fans they thought it was ok for us to stand and walk on asbestos pipes the place is a joke
we stripped most of that job when we erected the scaffold for the asbestos pipe they were removing, it was easier to strip the job & use the gear than get it up from the ground