tankage

Etymology
From.

Noun

 * 1) Storage in a tank.
 * 2) The amount that a tank (or tanks) can hold.
 * 3) The charge levied for storage in a tank.
 * 4)  Waste matter from tanks, especially the dried nitrogenous residue from tanks in which fat has been rendered, used as a fertilizer.
 * 1)  Waste matter from tanks, especially the dried nitrogenous residue from tanks in which fat has been rendered, used as a fertilizer.