Operation for others of energy systems and energy producing machinery, namely, engine generators, turbines, windmills and generators and the facilities and infrastructures associated therewith excluding systems and machinery for procurement, sale or transmission of natural gas, natural gas liquids, petroleum, and other similar fuels; consulting services in the field of monitoring costs related to energy use and consumption, thereby increasing efficiency; monitoring expenditures on energy systems for others excluding systems and machinery for procurement, sale or transmission of natural gas, natural gas liquids, petroleum, and other similar fuels

Maintenance and construction for others of energy systems and energy producing machinery, namely, engine generators, turbines, windmills and generators and the facilities and infrastructures associated therewith excluding systems and machinery for procurement, sale or transmission of natural gas, natural gas liquids, petroleum, and other similar fuels; construction, installation and maintenance for others of fire protection and life safety systems, namely, water and foam sprinklers and smoke detectors; consulting services in the field of installation and maintenance of emergency power systems; consulting services in the field of installation and maintenance of access and security systems; consulting services in the field of installation and maintenance of fire protection systems

Design for others in the field of energy systems and energy producing machinery, namely, engine generators, turbines, windmills and generators and the facilities and infrastructures associated therewith excluding systems and machinery for procurement, sale or transmission of natural gas, natural gas liquids, petroleum, and other similar fuels

Monitoring the safety of the energy systems for others excluding systems and machinery for procurement, sale or transmission of natural gas, natural gas liquids, petroleum, and other similar fuels