Every fire department has a history that is capable of going back hundreds of years.
Our firehouse has been standing for a long time... long before I was even born. They say that a ghost is nothing but a memory preserved in time. The people at the firehouse are torn between those who truly believe it is haunted, those who have seen things but ignore it, and those who have never seen anything and are totally skeptic. Based on my own experiences, I fall into the first category I named. I believe that people that have passed on still walk the firehouse. Sometimes strange things would happen... like I've seen the bay doors open and shut on their own when no one is standing near the button. Every now and then I would swear someone just walked into the room, and I'd turn around and the room would be empty. Apparitions can be seen sometimes walking the hallway or the bay. I've heard air brakes engage when none of the apparatus had turned a wheel all day. Sounds are heard that have no rational explanation. Though we search for some way to contraindicate the fact this place has spiritual inhabitants, we usually come back empty-handed.
Could it really be that we have unseen souls still tending to firehouses long after they've left this world? I honestly believe you can love this job so much that you would refuse to stop doing it even after you die. A firehouse would be a prime place for a haunting anyway considering the history and tradition of a fire department, many as I said, go back centuries.