Ever wondered just how big the tanks must be beneath a petrol station?...No me neither, but on my way home this last week or so I've seen the petrol station at my local Sainsbury's dug up - presumably to replace the tanks. I'm guessing they have a rated lifecycle and these ones have reached it. They have built a temporary station in the car park whilst this goes on, which doesn't affect parking in any way - because the car park is about 5 times the size it needs to be.
Oh and the title isn't a cynical joke (unusual for me) - this literally IS a money pit. These four tanks will have a capacity well into the high tens of thousands of Litres. Jungle juice is currently £1.30+ per litre. Thats alot of money.