717.20  BURNING JUNK.
   (a)   No rubbish or portion or parts of wrecked machines and other accumulations which are to be discarded by a junk dealer shall be burned on his premises without the written consent of the Fire Chief.
   (b)   No fire disposing of material accumulated in the yards shall be created less than thirty feet from any building.  Where the yard in which such junk business is conducted is so small as to not permit compliance with this restriction such person so operating such yard is required to build an incinerator within which the fires may be started to dispose of such refuse or other material desired to be destroyed by fire, or cleaned in such manner from grease and other collections.  (1973 Code §118.20)