Tend or feed machines or equipment used in construction; Remove rubble and other debris at construction sites; Mix, pour and spread materials; Load, unload and transport construction materials; Level earth to fine grade specifications; Erect and dismantle concrete forms, scaffolding, ramps, catwalks shoring and barricades; Assist in framing houses, erecting walls and building roofs; Clean and pile salvaged materials; Clean up chemical spills and other contaminants