Oil tanks are metal, and as such, must be recycled once they are safely decommissioned. Once emptied of all oil and oil residue, home heating oil tanks can and must be recycled as scrap metal.
There are two types of residential heating oil storage tanks, above ground tanks (typically found in basements or outside of homes) and underground tanks (buried).
Hire a professional – this is not a do-it yourself job.
For more information and a list of disposal facilities, visit Myrecyclopedia.