An aquifer is a rock formation containing water in recoverable quantities. The problem of aquifer contamination remains one of the greatest challenges facing environmental scientists and engineers. Air sparging has emerged as an alternative to both the pump-and-treat technology and conventional in situ bioremediation for treating this problem. This book conveys the latest practical experience and information from North America and Europe, and presents an overview of air sparging in general and examines the application of the technology to a variety of contaminants.