37 Maintenance of property, buildings, namely, mining; quarrying; oil and gas extraction, production, midstream and distribution; refining; and utility generation and transmission facilities, plant facilities and extraction, separation, process, boiler, heater, pump, vessel, distribution, process, mechanical, PVF, HVAC, test, pipeline, tailings and storage equipment; plant, maintenance, repair and operation; and, project management services for businesses in the energy extraction, production and transmission sector