Perform technical work in the operation of the wastewater treatment plant to include the maintenance, inspection and repair of wastewater lift station structures, equipment and machinery. An operator may operate the wastewater treatment plant on a daily basis, inspecting the plant for efficient operation of equipment and reading various charts, graphs, gauges and meters. Work includes the collection and laboratory analysis of wastewater samples and the maintenance and minor repair of equipment at the treatment plant. Maintenance and repair duties require the application of journeyman level skill in several trades particularly areas such as mechanical, electrical, and plumbing. Although all work is performed in accordance with established procedures, duties require the exercise of judgment based on training and experience in making decisions and coordinating the proper operation of equipment. Work is performed under general supervision and is evaluated through observation and discussions in terms of the efficiency of the wastewater treatment plant operation.