42 ENERGY USAGE MANAGEMENT; TECHNICAL CONSULTATION IN THE ENERGY AREA; CONSULTATION DURING THE PLANNING, CONSTRUCTION AND OPERATION OF POWER PLANTS, NAMELY COAL- FIRED, WASTE-FED AND ATOMIC POWERED, STEAM POWERED, GASPOWERED AND WATER POWERED POWER PLANTS, WASTE DISPOSAL PLANTS, NAMELY WASTE UTILIZATION AND WASTE INCINERATION PLANTS, CLEANSING PLANTS, NAMELY DESULPHURIZATION AND DENITRIFICATION PLANTS, AS WELL AS POWER NETWORKS, NAMELY DISTRICT HEATING AND ELECTRICITY NETWORKS; CONSULTATION DURING THE PLANNING, CONSTRUCTION AND OPERATION OF WATER SUPPLY AND WATER DISPOSAL PLANTS; CONSULTATION IN THE AREA OF MACHINE ENGINEERING, STEAM PRODUCTION, FLUE GAS CLEANSING, TURBOMACHINES, WATER-STEAM CIRCULATIONS, WATER ENGINEERING, NUCLEAR ENGINEERING, ELECTRIC ENGINEERING, PIPINGS, FITTINGS, MATERIALS AND WELDING ENGINEERING, CONTROL AND INSTRUMENTATION ENGINEERING, PROCESS CONTROL ENGINEERING, SECONDARY ENGINEERING, STRUCTURAL ENGINEERING, BUILDING PLANNING, PLANNING OF SUPPORTING FRAMEWORK, ENVIRONMENTAL ENGINEERING ANALYSIS, CHEMICAL ENGINEERING, NETWORK ENGINEERING, NETWORK PLANNING, SUBSTATIONS, LINE ENGINEERING, POWER SYSTEM MANAGEMENT AND COMMUNICATIONS ENGINEERING; SERVICES IN THE ENVIRONMENTAL FIELD, NAMELY THE PERFORMANCE OF MEASUREMENTS AND ANALYSIS IN ENVIRONMENTAL TECHNOLOGY, ADJUSTMENT OF ENVIRONMENTAL AND FIRING INSTALLATIONS, DRAFTING OF ENVIRONMENTAL EXPERT OPINIONS. SERVICES IN THE ENERGY FIELD, NAMELY OBTAINING PERMITS FOR TECHNICAL INSTALLATIONS, OPERATION MONITORING, PERFORMANCE OF CHEMICAL ANALYSIS, QUALITY MONITORING, SUPERVISION OF PRODUCTION, ASSEMBLAGE AND CONSTRUCTION, PERFORMANCE OF COMMISSIONINGS AND INSPECTIONS, DRAFTING OF TECHNICAL EXPERT OPINIONS; DEVELOPMENT, WRITING AND UPDATE OF DATA PROCESSING PROGRAMS FOR THE CONTROL, MONITORING AND ERROR ANALYSIS OF TECHNICAL INSTALLATIONS AS WELL AS SUCH FOR DATA CAPTURE