They don't have any records on when the tank went in in the 1960s. There was no requirements when I bought this house a year and a half ago. I just don't like having the tank in the ground and I'd like to put a small garden in that spot.If it's on record with the town you're screwed, if it isn't Fight Club is an option. Mostly depend on its age, older houses may have stuff underground that nobody knows about.