5000 gallons? That is a huge fucking tank. Back when I was married and we lived on the shore of the bay in a rural area we had a home that the furnace ran on fuel oil and the tank in the basement was only 500 gallons.
It's a giant tank that's in-ground, wrapped in concrete and some rubber membrane, and shit like that. It had to get a permit and be inspected.
After all, if I have a rough winter how is the giant fucking truck full of flammable fucking liquid going to get to my house?
Which is pretty much what I wrote on my permit application.
It must have worked! You will probably have to replace the tank due to corrosion at some point I would imagine. I don't know how long they last. Though the tank in the basement of that house I used to live in was probably installed when they built the house, It would never fit through the door and down the steps
It gets an inspection every 5 years. There are leak detectors around it, buried in the ground. It's all sorts of fancy.
It's basically the same thing you see at a gas station, with the same sort of control panel and the same regulations surrounding it.
Amusingly, I could have had 20 500 gallon above-ground tanks, which is twice as much fuel, and only had to stick 'em on a concrete pad for regulations.
Because I stuck it in the ground, much safer, I had to dance around a bunch of rules. My first permit request was denied and so I had to appeal that.
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