Sounds like the consensus is to level it and leave it where it lays. I'm definitely considering that. I think the tank was about $5000 and I spent about $900 burying it. It was done to code, but a permit was not pulled, nor was it inspected. Ironically, if we had not done it to code by surrounding it with that much sand, it probably wouldn't have floated. Around here we have clay and round rocks. The sand just created a void for the water to run into. By buying the big tank, my propane price went from $3.30 to $1.94. I figure it will pay for itself in 5 years, plus the peace of mind of being able to run the generator for over a month if need be. I like the concrete on top idea, too.