I’m sure it’s just a building problem. It’s old, and they’ve been talking for several years of building or moving into a new one.
Yes, a maintenance issue. The most amazing thing is that the FBI told the truth about this issue.
I’ve never heard a commercial building make regular periodic noises like that. I started up large package boilers for large commercial buildings and our safety valves never sounded like that when they popped off. The sounds are very weird.