37 Providing installation, maintenance and repair of flue gas desulfurization systems for power generation and industrial processes; Providing fully integrated environmental solutions, namely, installation and maintenance of environmental containment systems for utility power plants, waste-to-energy facilities and large industrial applications; Providing installation and maintenance of dual loop wet flue gas desulfurization systems; Mercury removal from coal-fired power plants; Mercury emissions control services, namely, installation of mercury emissions control plants; Providing multi-pollutant air quality control systems for power generation and industrial processes, namely, construction and installation of air quality control plants and providing technical advice concerning the repair and maintenance of air quality control plants; Providing regenerative selective catalytic reduction systems for industrial facilities and power plants, namely, installation of regenerative selective catalytic reduction systems for industrial facilities and power plants; Providing regenerative selective catalytic reduction systems for industrial facilities and power plants, namely, maintenance and field repair services; Providing fully integrated environmental solutions for utility power plants, waste-to-energy facilities and large industrial applications, namely, installation and maintenance of environmental containment systems; Providing installation services of single loop wet flue gas desulfurization systems; Providing waste removal in the nature of desulfurization reduction and removal of other acid gas emissions from power plants and industrial facilities utilizing either wet or dry technology; Providing dry scrubbing technology services to power plants and industrial facilities, namely, installation and maintenance of air scrubbers in power plants and industrial facilities; Installation of upgrades to existing emission removal systems in large industrial systems; Providing integrated and field services, namely, providing integrated maintenance and field repair of scrubbers for air pollution control for power generation and industrial processes; Providing selective catalytic reduction technology management and performance services, namely, maintenance and repair of catalytic reduction plants for utility and waste-to-energy systems; Providing technological services, namely, installation, maintenance and repair to upgrade and maintain steam generating plants; Providing on-site construction of structures, installation, repair, and alteration, namely, machinery conversion and retrofitting and maintenance of boilers and boiler-related equipment maintenance and repair services; Providing construction project management services in the field of replacement pressure parts for boilers; Providing field maintenance and repair and retrofitting services for heat recovery steam generators; Providing construction services, namely, construction of structures and installation of heat exchangers and condensers; Repair and maintenance of heat exchangers and condensers; Providing turnkey solutions, namely, installation with field maintenance and repair services and site installation of heat exchangers and condensers; Providing field machining namely, refurbishing of boilers, environmental control systems, tanks, turbines, pumps, interconnecting piping, valves, and fittings in power plants and industrial process facilities; construction services for new and existing plants using direct-hire personnel; Providing on-site installation, machinery retrofit and conversion repair and maintenance of any OEM boilers and boiler related equipment; Providing construction project management services; Providing technical advisory and consulting services about the installation, repair and maintenance of regenerative selective reduction systems for industrial facilities and power plants