Civil engineering structures, namely, storage basins in the nature of non-metal in-ground sewage and water run-off basins; non-metal swimming pools; non-metallic building materials to building civil engineering structures, namely, storage basins in the nature of non-metal in-ground sewage and water run-off basins; non-metal composite sheeting and panels for making watertight walls; non-metallic panels forming casings for building swimming pools; non-metallic protective fitted covers for swimm...