It is made up of a single room. At one end sits a large stack of fuel drums and to the right a counter with a large amount of maize on it. It is full of a flammable fumes.
Inside are 102 pieces of maize, largest amount in a single section in the game.
- Having a flame based weapon out (such as the flamer) while near the fumes will cause an explosion. Firing any Energy Weapons, Guns, or Explosives skill weapons inside will always cause an explosion. Even the BB gun will cause one.
- 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.