1.1 This specification covers the types, physical properties and dimensions of rigid cellular polystyrene intended for use as geofoam. 1.2 This specification does not cover the layout, placement and workmanship for proper This specification presents the types, physical properties, and dimensions of rigid cellular polystyrene (RCPS) intended for use as geofoam. This specification, however, does not address the layout, placement, and workmanship for proper installation an