Underground tank appears to be empty
I just checked the tank in anticipation of starting up the fireplace for the season and discovered it was empty as I can no longer see the level indicator. I thought it had a slow leak but a previous check by the propane company didn't discover anything obvious. I'm wondering how to proceed as it will be expensive to have the tank replaced as it would have to be dug out by hand as there is no way to bring in equipment any more to my backyard as they have already tried that once. I'm also thinking about retiring the propane fireplace and installing an electric one in its place so I would then have to retire the tank in place in a safe manner if allowed. Any suggestions appreciated.