Abstract: A method of remediating a contaminant from soil is provided. According to the present method, clean (uncontaminated) soil is mixed with contaminated soil in a ratio that provides for remediation of the contaminant. The soil mixing method utilizes soil vibration and water as a hydraulic medium to achieve mixing of the clean and contaminated soil such that the contaminated soil is distributed homogeneously throughout the mixed soil to bring the level of contamination of the soil contaminant to within an acceptable level.

Abstract: A wiper heater insert includes a coiled heater wire, slip fit insulator, and an air gap between the heater insert and a longitudinal bore of the wiper. These three features minimize warping caused by thermal expansion and maximize the flexibility of the wiper. A press fit bushing at one end provides a readily removable heater element to minimize the cost of replacing a wiper blade and save wear and tear on the heater insert when it is not needed during the summer.

Abstract: An arrangement for butt-welding cylindrical sections of large, thin-wall tanks includes a rotatable mandrel with side-by-side sets of radial position adjusters. Each set of adjusters bears on one of the tank sections adjacent the seam, to prevent the sections from sagging out-of-round. The mandrel rotates relative to the welder, so that a continuous seam is formed. A purge chamber is fixed in position behind the seam at the weld head, and is flushed with inert gas. The purge chamber includes a two-sided structure which is contiguous with the cylindrical sections and a circumferential vane to form an open-ended tube-like structure, through which the radial position adjusters pass as the mandrel and cylindrical workpiece sections rotate. The tube-like structure is formed into a chamber by a plurality of movable gates which are controlled to maintain a seal while allowing adjusters to progress through the purge chamber.

Abstract: A strapping machine for applying a tensioned strap loop horizontally about the girth of an object in which a yoke for lacing a strap about an object and means for tensioning and securing such strap are together adjustable as a unit, first into a desired projected position vertically of the object which is to be strapped, and then into a horizontal projected position in which the strap tensioning and securing means are directly adjacent to such object immediately prior to performing their respective functions.