HVAC contractor services; pipeline construction and maintenance; installation of appliances and heating systems; plumbing services; construction of energy and utility related buildings

public utility services in the nature of natural gas distribution; public utility services in the nature of water distribution; public utility services in the nature of electricity distribution; transmission of natural gas and liquefied petroleum gas through pipelines; storage distribution and transportation of natural gas

production of energy; oil production services; natural gas production services; water treatment; waste management services

[ surveying and engineering ]