Abstract: A method and apparatus for on-site remedial soil restortation activity of a work site contaminated with volatile organic compounds. Soil is removed from the ground and hauled to an initial feed hopper whereat it is conveyed to an inlet end of a hollow rotating cylinder having plural flights therein for effecting a moving of the contaminated soil lengthwise of the rotating cylinder toward an outlet end. The soil is heated as it tumbles about in the cylinder and the volatile organic compounds (VOCs) are volatilized inside the rotating cylinder. The soil exiting the outlet end of the cylinder is thence recirculated through the rotating cylinder and thereafter fed to a conveying mechanism, whereat the cleaned soil is delivered to a selected location. The hot gases are scrubbed to remove therefrom any organics, acids and phosgenes and, if present, soil fines. The now cleansed gases are thereafter allowed to escape into the atmosphere as clean air.

Abstract: A method and apparatus for on-site remedial soil restoration activity of a work site contaminated with volatile organic compounds. Soil is removed from the ground and hauled to an initial feed hopper whereat it is conveyed to an inlet end of a hollow rotating cylinder having plural flights therein for effecting a moving of the contaminated soil lengthwise of the rotating cylinder toward an outlet end. The soil is heated as it tumbles about in the cylinder and the volatile orgainc compounds (VOCs) are volatilized inside the rotating cylinder. The hot gases drawn from the cylinder are filtered for the purpose of removing dry soil fines. The soil exiting the outlet end of the cylinder is then recirculated through the rotating cylinder and thereafter fed to a conveying mechanism, whereat the cleaned soil is delivered to a selected location. The cleaned soil is then placed into the ground. The hot gases are scrubbed to remove therefrom any organics, acids and phosgenes.