Who you gonna Call? GHOSTBUSTERS
My station is an old railroad building that the town turned into an ambulance garage. People have said they've heard people walking around, but its also an old building, so of course everything is going to creak. I've also been a member here for over two years, and haven't seen or heard anything weird.
Same with my firehouse. During renovations years ago, some homeless man wandered inside to escape the cold, and died of hypothermia in one of the bathrooms. They say that he haunts the place, but I've spent many nights there, and have heard nothing but the creaking and banging of pipes, which is normal because the building is over 100 years old.
A lot of station haunting can probably be debunked because the buildings are old.
But, there is a health center in our district that used to be a hospital. the downstairs is still used as an ER, but the top few floors are abandoned. And when I say abandoned, I mean abandoned. One of the medics took me and a few of my buddies up there one night, and it was weird. There was paperwork everywhere (nothing HIPPA related), IV setups, beds, supplies, everything, left where they fell. And every chair (and I mean that, at least 50-100 chairs) all faced out the window. Each room had chairs that were turned to face out the window in their room. Except for one, which was at the end of the hallway next to the nurse's station, that faced down the hallway, giving someone who sat in the chair a view of every room, as if keeping watch. It was creepy, and like I said, it looks like people just upped and left one day. Even the ICU room was left in shambles.
TL;DR, I believe in ghosts, but I also believe in simple explanations for the most part, unless there is no simple explanation.