Introducting a prepared chlorine solution into a well.
Bulk displacement is the recommended method of introducing a prepared chlorine solution into a well. It involves preparing a predetermined volume of disinfectant solution and pouring or pumping the solution into the well. The chlorine solution displaces water in the casing, screen/borehole and aquifer, replacing it with the chlorinated solution. This is the most practical method to assure that chlorine is uniformly distributed throughout the well and reaches the aquifer surrounding the well intake.
For example, a 125-foot deep well with 5-inch diameter casing, with a static water level of 25 feet below ground, has a volume of 100 gallons. Therefore, the volume of the stock solution should be 500 gallons. For fractured limestone and other highly porous formations, the volume of the chlorine solution should be increased to assure chlorine contact with all contaminants that may have been introduced into the formation.