Construction of water and sewage networks:
- installation and supply of wastewater treatment plants, including buildings
- implementation of the main water supply and sewage systems, including earthworks and landscaping to the original state
- execution of domestic water and sewage connections, including earthworks and landscaping to original condition
- cutting asphalt and concrete surfaces of roads and sidewalks up to a depth of 175 mm
- plumbing work inside buildings
- construction of steam and gas pipelines.