Which process is NOT part of the tank decommissioning by removal?

When decommissioning a heating oil tank by removal, the processes involved typically include cleaning the tank to remove any residual oil and contaminants, removing all piping to ensure that no connections remain that could lead to leaks, and making proper arrangements for the disposal of the old tank according to environmental regulations and safety standards.

Filling the tank with water is not a standard process in the context of decommissioning by removal. In fact, filling a tank with water could pose several risks, such as potentially creating pressure issues or complicating the removal process. The best practice involves emptying the tank completely and ensuring it is clean and safe to transport without introducing additional liquids inside that might complicate the procedure.

Thus, the focus during decommissioning is on ensuring the tank is entirely emptied and ready for safe handling, making filling it with water an inappropriate step in this process.