Battery charging services; Battery regeneration services; Electric appliance installation and repair; Electrical contractor services; Electrical repairs, maintenance, and installation of electrical wiring, outlets, light fixtures, and electrical panels; Refrigerant recovery and abatement services, namely, removal of refrigerant from a system and placement of the refrigerant into a container; Building demolition; Cleaning services, namely, mechanically removing scale and sludge from tubes in steam generators in nuclear power plants; General contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; Installation and replacement service for heating, ventilating and air conditioning systems; Installation and maintenance of fire alarm, detection and suppression systems; Installation of electrical and generating machinery; Installation, maintenance and repair of computer servers; Maintenance, repair, replacement and tuning of components, parts or systems in steam and gas turbine generators; Power generation engine cleaning services; Repair or maintenance of electric motors; Repair or maintenance of power distribution or control machines and apparatus; Repair or maintenance of power generators; Repair services for electric generators and wind turbines; Self-perform construction skilled trades, namely, concrete work, carpentry and selective demolition services