AHHAAHHA THEY CANNOT actually by law do that. They are disguising it as a safety check, but in reality it is to check for a grow op. I would tell them to --------> O I know you are doing nothing wrong, but then they know what value is in there, I just say, nope, the gas pipes are fine, no leaks, I am safe.
Just say you have a bunch of servers that create heat, that's why the gas usage went down. I am sure the laws are the same or similar. Here if a public utility person sees a grow op, they have to report it, on the flip side they are not allowed to enter a property to look for that, OR to mislead a person to let them into a property to look for something, like safety issue, and then find a grow op. So the question arises - HOW and WHY now did the safety check issue ever come up, since there was never one before. If they had a history of doing real safety checks every 2 - 5 years, then maybe, but in this case I would give them the run around just because of my privacy.
The super-sick-sneak-move is a btc mining operation as a front for your grow-op.