Non-metal building materials, namely, plastic preformed blocks that can be stacked and filled to form retaining walls, primarily for landscape, gardening, and home improvement uses

Environmentally sensitive building and construction materials, namely blocks, bricks and panels made from recycled lightweight materials and concrete, which are intended for use in the construction of walls in residential and commercial buildings

construction services, namely, installation and maintenance of subsurface barriers for fluid containment

construction services relating to the fabrication, installation and maintenance of containment systems and devices used in conjunction therewith

sound/noise walls for highways made from crumb rubber