Building construction services, namely, providing services for building water treatment plants; construction, repair and maintenance of water treatment plants, apparatus, devices and static or mobile installations for distributing, treating, purifying and filtering water and wastewater, namely, repair or maintenance of water treating and purifying apparatus, repair or maintenance of water pollution control equipment; services for putting into service, repairing and maintaining apparatus, devices and static or mobile installations for the purification of urban and industrial wastewater, namely, repair or maintenance of wastewater purification machines and apparatus, environmental remediation services in the nature of waste disposal services; services for putting into service, repairing and maintaining apparatus, devices and static or mobile installations for rendering water drinkable, namely, repair or maintenance of water purifying apparatus, repair or maintenance of water pollution control equipment; services for putting into service, repairing and maintaining apparatus, devices and static or mobile installations for the treatment, disinfection and filtration of sludges, namely, repair or maintenance of sludge treatment and disinfection machines and apparatus; services for putting into service, repairing and maintaining apparatus, devices and static or mobile installations for the treatment of waste in the context of domestic, municipal or industrial applications, namely, repair or maintenance of water treating and purifying apparatus, all of these services are provided in the field of water treatment for purifying and rendering water drinkable and meet quality standards with regard to environmental protection relating to ecology, sustainable development and environmental quality

Services of engineers for analyses and research in the fields of science and technology; architecture; namely, providing architectural consultancy, architectural design, landscape architectural design; advice on construction, namely, providing advice on research on building construction, advice on construction drafting, consulting in the construction of buildings and works that meet quality standards with regard to environmental protection in the field of ecology, sustainable development, environmental quality, namely, consulting for the construction of water treatment and purification plants, solid waste treatment plants and other municipal infrastructure facilities; drawing up of plans of buildings and works that meet quality standards with regard to environmental protection in the fields of ecology, sustainable development, environmental quality; quality control for others; technical project studies, namely, engineering, particularly technical project planning and design engineering of lines for the processing of web products, conducting of feasibility studies, hydrologic study of surface and ground water; expert reports of engineers, namely, conducting engineering surveys, drawing up of plans and engineering drawings; engineering consulting in the field of water quality standards with regard to environmental protection relating to ecology, sustainable development, environmental quality; evaluations, estimates and research, namely, testing, analysis and evaluation of the goods and services of others for the purpose of certification, working on and evaluation of chemical analysis, geological estimations and research in the field of quality standards with regard to environmental protection relating to ecology, sustainable development and environmental quality