42 Water quality control services; scientific and industrial research services relating to environmental protection; laboratory research services in the fields of water and water treatment and purification; chemical analysis, chemical research, professional scientific consultancy, engineering project study, and engineering, not for construction, in the fields of water and water treatment; scientific consultation, namely, providing expert appraisals in the field of water and effluent treatment, laboratory research services in the fields of industrial, household, hospital and special waste, refuse, sludge and ash treatment, and industrial, household, hospital and special waste recovery; bacteriology research services; scientific consultation, namely, providing expert appraisals in the field of industrial, household, hospital and special waste, sludge and ash from plants, both urban and industrial; computer programming; computer services, namely, development, design and updating of computer software and software packages; technical consulting and advice in the field of computing; computer rental; design of computer and telecommunication systems; scientific and industrial research services for developing and evaluating the performance of physico-chemical water treatment processes and products; scientific and technical studies for developing and evaluating the operation performance of installations for treating drinking water or industrial process water, for treating household or industrial wastewater, as well as for treating physico-chemical or biological fluids and sludges; technical audits, namely, engineering advise and work relating to these waste and wastewater treatment processes and equipment and to all other fluid treatments, including in the field of industrial processes; research center, namely, laboratory research services in the fields of collection, transport, treatment, cleaning, storage, sanitation, recovery and disposal of waste and refuse; scientific consultation, namely, providing expert appraisals in the field of waste and refuse; scientific and industrial research relating to environmental protection for the collection, transport, treatment, cleaning, storage and recovery of waste and refuse; engineering and engineering project study in the fields of design and construction of industrial and urban centers and units for waste and refuse collection, sorting, storage, treatment, recovery and disposal; pollution prevention services, namely, scientific consulting regarding environmental protection, urban planning, industrialization and natural resource promotion; environmental information on the impact of pollution on the environment with regard to economic, social and environmental implications; urban planning related to industrialization and use or promotion of natural resources, particularly of water; soil testing; agricultural, horticultural, wine growing, arboricultural and silvicultural engineering