37
Construction, installation, repair, maintenance and cleaning of water wells, pipelines, pipes, drains, sewers, mains, sewer systems and tunnels; construction, installation, repair, maintenance and cleaning of water supply mains; civil engineering relating to water irrigation; plumbing and water installation; construction, installation, repair, maintenance and cleaning of water pollution control equipment; construction, installation, repair, maintenance and cleaning of apparatus and installations for treatment of soils, soil conditioning, treatment of water, water purification, sewage, effluent, sludge, industrial waste, waste water, water, sea water; construction of engineering projects relating to the provision, cleaning and supply of water; civil engineering relating to the prevention of inundation of land by flood water; consultancy services relating to the installation of apparatus and installations for the treatment and storage of soils, sea water, sewage, effluent, water, waste water, sludge, industrial effluent and waste; information, advisory and consultancy services relating to all the aforesaid services
39
Transport services; collection, transport, disposal, distribution, storage and supply of soils, sea water, sewage, effluent, water, waste water, sludge, industrial effluent and waste; collection, transport, disposal, distribution, storage and supply of soils, sea water, sewage, effluent, water, waste water, sludge, industrial effluent and waste through public and private sewers; information, advisory and consultancy services relating to all the aforesaid services
40
Services for the treatment, purification and decontamination of sewage, effluent, water, waste water, sludge, sea water, industrial effluent and waste; information, advisory and consultancy services relating to all the aforesaid services
42
Design and development of water wells, pipelines, pipes, drains, sewers, mains, sewer systems and tunnels; design and development of water supply mains, water pollution control equipment and apparatus and installations for treatment and storage of soils, soil conditioning, treatment of water, water purification, sewage, effluent, sludge, industrial waste, waste water, water, sea water; design and development of systems for the collection, transport, disposal, distribution, storage and supply of soils, sea water, sewage, effluent, water, waste water, sludge, industrial effluent and waste; design and development of systems for the treatment, purification, storage and decontamination of sewage, effluent, water, waste water, sludge, sea water, industrial effluent and waste; analysis, monitoring, quality control and testing of water; technical design and planning of sewerage systems; environmental testing and inspection services; consultancy services relating to the operation of apparatus and instruments for the treatment and storage of soils, sea water, sewage, effluent, water, waste water, sludge, industrial effluent and waste; technical and engineering project studies; geological prospecting; design of engineering projects relating to the provision, cleaning and supply of water; information, advisory and consultancy services relating to all the aforesaid services