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.

Abstract: In a device for indicating a preset amount of relative movement between two points, an indicator sleeve axially movable in a cylindrical bore in a housing fixed to one of the points remains flush with the housing until the preset amount of movement is reached at which point the sleeve pops up to give a positive, easily identifiable indication of the movement. An actuating rod which bears against and follows the second point is axially slidable in the sleeve and operates a ball bearing mechanism which locks the indicator sleeve in the retracted position. The amount of movement required to generate the discrete indication is easily variable and monitoring of the actual displacement is always available.