13.16.580   Destruction.
   Except as provided in Sections 13.16.590 and 13.16.600, well destruction shall be accomplished by clearing the shaft of any obstructions, if possible, and filling the shaft in the following manner:
   A.   The water well shafts shall be filled to within twenty (20) feet of the surface with inorganic material. The top twenty (20) feet of the shaft shall be filled with impervious material. If an annular space exists, the casing shall be perforated twenty (20) feet from the surface and the impervious material allowed to flow into and seal the annular space. (Prior code § 7818)