Must demonstrate ability to learn and independently operate equipment such as pumps, engines, centrifuge, generators, valves, gates, mixers, conveyors, blowers, dryers, chemical feed, odor control, disinfection equipment, sludge processing filters, belt presses and measuring/control devices, testing equipment and material handling equipment. Tends automatic and semi-automatic machines and related equipment including pumps, engines, generators, valves, gates, mixers, conveyors, blowers, chemical feed and odor control and vacuum filters used to decontaminate waste water by settling, aeration and sludge digestion.