the Tennessee rules and regulations. This is to protect the well from caving in and to prevent contaminants from entering the well. Casing will not be needed for the full well depth, only to solid rock. We use only galvanized casing with a wall thickness of .0188. The use of galvanized casing has been proven not to rust and cause iron scale that might enter your water source and stand up to the test of time for endurance. Your well casing will be properly sealed and grouted with an approved NSF grout. This will form a protective barrier against contaminated water entering your well from the surface or from undesirable aquifers. After the completion of the drilling and the development of the well, we will sanitize your well to insure that bacteria was not induced in the drilling process, and place a sanitary cap on the well. All measures are taken for the protection of the ground water and to provide you with a superior water well.