This question has already been asked, but in the previously asked question the tank was plastic and was sited outside. This one is metal and in a cellar its 6 ft. by 4 ft. by 4 ft. The kerosene/air flammable mix is the obvious question. The tank is as empty as possible, but there is about half an inch of residual sludge left in the bottom.
How can I cut up this tank and remove it?