It is made up of a single room. At one end sits a large stack of oil drums and to the right a counter with a large amount of maize on it. It is full of a flammable gas.
- Inside are approximately 102 pieces of maize.
- Having a flame based weapon out (such as the flamer) while near the gas will cause an explosion. Firing any Energy Weapons, Guns, or Explosive weapons inside will always cause an explosion.
- The large amount of maize found within is a reference to real world biofuel which is often made from corn.
The biodiesel refinery appears only in Fallout: New Vegas.