In preparing the berms, expanded polystyrene (EPS) blocks are first assembled and layered to create the shape of the slope. Next, gravel is poured onto the formwork, using a specialized gravel pump, to create a smooth and continuous surface. Then, a liner is laid that will separate the concrete from the gravel. A network of rebar is placed on top of the liner to strengthen the concrete, which is finally poured on top. The concrete surface is designed to allow small service vehicles to safely drive on the berm without damaging it. When completed, the berm will be covered with topsoil, and then landscaped with grass, shrubs, and other foliage.