872.13 FILLING BETWEEN CASING AND WALL OF WELL.
   The annular space between the casing and well wall shall be filled to the surface with prepared clay, cement, rock sediment or bentonite to prevent any migration of water. If bentonite is used, the mixture shall be not less than two parts bentonite and one part ground fireclay and shall be circulated under pressure to the top of the hole.
(Ord. 2007-69. Passed 11-19-2007.)