People often use 'abandoned' to mean a tank is empty, disconnected or no longer wanted. The paperwork may mean something more specific. Removing a tank takes it off the property. Closing it in place can leave the tank behind, where allowed.
Before choosing the less expensive-sounding option, ask two questions: Is it allowed for this tank? And will the buyer, lender or insurer accept it?
What the FDNY guidance says
The New York City Fire Code guide explains that fuel-oil tank systems taken out of service must comply with applicable requirements. It also states that old tank removal is licensed work under the relevant rules. Confirm the currently applicable procedures with the licensed professional and authority.
Buried versus basement tanks
A tank inside a basement may be accessible for physical removal. A buried tank can involve excavation and questions about nearby structures or soil conditions. The possibilities and paperwork are not interchangeable.
Closing records and lender conditions
A certificate, permit closure, receipt and environmental report answer different questions. Before paying for work, ask for the exact written requirement from the lender, insurer, buyer or agency.
Avoid unsupported assurances
No website can guarantee that an in-place method will be accepted for an individual property without an appropriate assessment. Ask who performs the work and who provides the final documents.
Before accepting an estimate, ask who's responsible for the leftover oil, pipes, disposal and any permits. Have the company put those details in writing.
Official references
Check these agencies' current guidance for your property and type of work: