When the nearest bulk storage tank is one mile from the fueling apron, which tank can be used as an operating storage tank on the Type 3 system?

The capacity of the tank needs to align with the operational requirements of the fueling system while also considering the distance from the fueling apron. In a Type 3 system, it is crucial to have a tank that can effectively serve as an operating storage tank while also being manageable within the given proximity.

A 10,000 barrel tank is suitable as an operating storage tank because it is large enough to meet typical fueling demands without overextending the logistical capabilities of transporting fuel from a distance of one mile. The key factor here is that the tank size should support efficient operations at the apron while still being feasible for regular delivery and use.

Larger tanks, such as those with 20,000, 30,000, or 40,000 barrel capacities, might not be as practical in this scenario due to their size and the complexities associated with managing larger quantities of fuel at a further distance from the apron, including potential delays in fuel availability and increased logistical challenges. Therefore, the 10,000 barrel tank represents a balanced choice for an operating storage tank in this context.