A system for protecting data stored in a memory of a removable data storage device is provided. In some embodiments, a shielding apparatus may include first and second conductive regions and a plurality of vias disposed between the first and second conductive regions. The nose section of the aircraft would tilt upwards or to the side, either before or after the aircraft enters the terminal docking station, wherein the passenger compartment would be removed from the aircraft and placed in a deplaning area. Waste water is supplied through the inlet port to the upper first part, and the waste water is allowed to undergo a separation by gravity, whereby a grease layer is formed on a separated waste water layer and a sludge layer on the plate.