Abstract: A replaceable cap sleeve system is described herein which remedies the cost of acquiring multiple pairs of footwear by providing flexibility to match apparel. The system includes a base shoe structure having only a projecting heel, an insole, an outsole, and an instep area between a toe area and heel area, a removable toe sleeve adapted to extend over at least a portion of the toe area and insole of the base shoe structure, but which is attached to the underside of the base shoe structure at a location on the outsole, and a separate, removable heel sleeve adapted to be fastened over the projecting heel of the base shoe structure. A completed shoe for wear is realized that covers toes of a wearer and supports the wearer's heel with the toe and heel sleeves installed on the base shoe structure.

Abstract: A device for use in remediation of a multiplicity of adjacent subsurface geologic strata is described. The device comprises co-axially or concentrically positioned conduits installed in a borehole with an inner conduit extending below an outer conduit through a seal attached to the distal end of the outer conduit. The distal ends of both the outer, upper and the inner, lower conduits are perforated to allow the flow of liquids or gases through the conduits between ground surface and the geologic stratum adjacent to the perforated sections of both conduits. The annular spaces between the borehole wall and the unperforated portions of both the inner and outer conduits are sealed with impermeable barrier plugs to prevent flow parallel to the borehole axis between the borehole wall and the outer surface of the conduits. The annular spaces between the perforated sections of both conduits and the borehole wall is filled with a permeable granular filtration material.