Louisiana Administrative Code
Title 56 - PUBLIC WORKS
Part V - Capital Area Ground Water Conservation Commission
Chapter 5 - Regulations and Standards for Plugging and Sealing Abandoned Drilled Water Wells and Holes
Section V-523 - Wells Greater Than 50 Feet in Depth and Where One or More Fresh Water Aquifer is Penetrated

A. The entire well shall be filled from the bottom up to the top of the casing with neat cement; or

B. fill material shall be placed in the screen or in the open hole opposite the producing aquifer. A bridge plug of not less than 50 feet in length shall be set above the top of the screen. The remainder of the casing below the upper 30 feet shall be filled with fill material, above which the surface plug will be set. In addition, a bridge plug of not less than 50 feet shall be set and centered at the depth(s) where the size of the casing is reduced and the casing of different diameters are joined by a seal or reducer.