The tank is a composite hermetic tank. The storage capacity is calculated in liters. It can hold 1100 liters of liquid, equivalent to 5000 people, and 23 liters of solid waste, representing 115 people for the pump drain model. For the truck pump drain, the capacity is 715 liters of liquid, representing 3250 people, and 46 liters of solid waste, representing 230 people.