Abstract: An in-place soil sampler assembly includes an outer barrel or tube coupled to a corer point at one end thereof. An inner samping tube is contained within the outer tube. A soil sample retainer has a support ring connected to one end of the inner sampling tube. The support ring carries a plurality of flexible arcuate leaves each having a base portion secured to the ring and each having an apex moveable with respect to the support ring between opened and closed position. A collar is mounted at the end of the outer tube to form a cavity for receiving the soil sample retainer when the leaves are opened for passage of a soil sample from the corer point into the inner sampling tube; the leaves are closed when the support ring is removed from the cavity so as to form a convex soil sample support surface facing in the direction of the inner sampling tube for holding a soil sample therein.

Abstract: A method is disclosed for the use of an aqueous surfactant solution to remove water-insoluble, organic contaminant from subsurface soil layers. The process is carried out continuously with the application of the surfactant solution and the removal of the leachate from a recovery well within the treatment area. It is contemplated that the leachate will be treated above ground to remove the dispersed contaminant.