Abstract: Apparatus that mounts on a standard construction vehicle, such as a crawler or a backhoe. The apparatus drives piles, including sheet piles, that typically are used for bulkheading and earth fortification. A hydraulic cylinder with a downward extendable piston is fixed on a leader and the hydraulic pressure drives the piles. The apparatus is self-erecting and transportable on the construction vehicle.

Abstract: A polymeric retaining wall member with interlocking means along its edges that are universally mateable to like members, such that a plurality of like members can be interlocked to form a wall.

Abstract: The disclosure relates to dump sites for chemical and toxic wastes which avoid the usual problems of chemical pollution of ground water, streams and rivers. Use is made of impacted reinforced concrete tongue and groove sections in sealed relation to the upper surface of a naturally occurring aquaclude which define an enclosed area. Within the enclosed area there are provided a plurality of vertically positioned columns of sand which serve as wicks for collecting liquids. The wicks communicate at the upper ends thereof with gravel windrows leading to a collection pit from which liquids are pumped off for refining and/or recirculation to a chemical plant.