Ability to quickly move hands, hands together with arms, or two hands to grasp, manipulate, or assemble objects, ability to exert muscle force repeatedly or continuously over time; this involves muscular endurance and resistance to muscle fatigue, ability to use abdominal and lower back muscles to support part of body repeatedly or continuously over time without 'giving out' or fatiguing, ability to quickly and repeatedly bend, stretch, twist, or reach out with body, arms and/or legs. Assists in performing maintenance and repair work on all plant facilities, pumps, engines, motors, chemical feeders, filters, bar screens, valves, pipes, heat exchangers, air compressors, heating/cooling equipment, aeration equipment, and all other major mechanical and hydraulic equipment found in a wastewater treatment facility and collection system.