Richard J Kinch wrote:
miamicuse writes:

I am trying to figure out how to remove and dispose of this thing.

Empty it and cut it into pieces small enough your trash collectors will
take.

A 9-inch angle grinder with metal cutting disks would be an appropriate
tool to use. Or a cutting torch.

A free-lance welder would be the guy to call for hiring this out.

Cut it in half, weld on some hinges, now you have a swell barbecue!

be aware the sludge can be hazardous and might be fire hazard taking
cutter to a old tank filled with oil vapors

call a oil supplier and have the tank properly disposed of............