7-4-20: TANK FILLING AND FILLING CONNECTIONS:
   A.   Deliveries of flammable liquids of class I and II shall be made directly to the storage tank through the filling pipe by means of a hose or pipe between the filling pipe and the barrel, tank wagon or tank car from which such liquid is being drawn.
   B.   The end of the filling pipe for underground storage tanks for class I and II liquids shall be carried to a location outside of any building, but not within five feet (5') of any entrance door, or cellar opening; this filling pipe shall be closed by a screw cap. (1961 Code)