42 Water quality control services; scientific and industrial research relating to environmental protection; technical and scientific research in laboratories in the fields of water, water treatment and purification; chemical analysis, chemical research, and professional consultancy in the field of waste and water treatment; technical project studies, namely, technical research in the field of environmental studies; engineering and engineering works, namely, technical research in the fields of water and water treatment; technical expert appraisals in the field of water and effluent treatment; laboratory research services in the fields of industrial, household, hospital and special waste treatment, of refuse, sludge, ash, industrial, household, hospital and special waste recovery; bacteriological research; expert reports of engineers in the field of industrial, household, hospital and special waste, sludge and ash from both urban and industrial stations; computer programming; computer services, namely, development, design and updating of computer software and computer software packages; consultancy and technical expertise relating to the research and development new products in the computing field; computer rental; design of computer and telecommunication systems; scientific and industrial research services for developing and evaluating the performance of processes and products for physico-chemical treatment of waters; scientific and technical studies for developing and evaluating the operational performance of installations for treating drinking or industrial water, for processing wastewater, household or industrial wastewater, as well as for treating physicochemical or biological fluids and sludges; engineering services, namely, technical auditing in the field of water treatment; technical research center services in the fields of collection, transport, treatment, cleaning, storage, sanitation, recovery and disposal of waste and refuse; engineering services in the field of waste and refuse; scientific and industrial research in the field of environmental protection, namely, the collection, transport, treatment, cleaning, storage and recovery of waste and refuse; engineering services; technical project studies in the nature of technical research in the field of waste and water treatment; engineering in the fields of design and construction of industrial and urban centers and units for the collection, sorting, storage, treatment, recovery and disposal of waste and refuse; scientific research on the prevention of air, water and sound pollution; consultation relating to research in the field of environmental protection, urban planning, industrialization and natural resource development; providing scientific and technical information on research in the field of environmental protection; conducting studies in the field of engineering on economic, social and environmental implications, urban planning operations, industrialization and use or development of natural resources, in particular water; soil tests, namely, soil percolation testing; engineering services in the field of agricultural, horticultural, wine growing, arboricultural and silvicultural industries; quality control for others of water, air and soil; engineering services in the field of industrial information systems, namely, centralized technical management and control systems; technical project studies consisting of analyses, evaluations, estimates, and research, namely, technical consultation in the technology, maritime, offshore, port and energy fields as well as sustainable development, the environment, climate, weather, the management of household and industrial waste, water, flood control, hydrogeology, wet area management, public transport, telecommunications, civil engineering and urban engineering; quality control services for others in the nature of testing, analyzing and evaluation of services of others to assure compliance with waste treatment industry and water treatment industry standards and to determine conformity with certification standards