Observes and monitors WTP operations, equipment, and process control systems; including, but not limited to, cleaning, maintaining, reading, and interpreting plant equipment gauges, dials, graphs, manuals, and other instrumentation; operates and adjusts treatment processes, chemicals, pumps, valves, motors, and other equipment to maintain appropriate plant operations; receive and unload chemical or other deliveries; troubleshoot treatment issues and communicate to supervisors. Maintains and repairs mechanical equipment and components and performs preventive maintenance as directed; maintains and adjusts equipment to meet job specifications and technical codes; checks equipment to verify proper operating conditions and identify maintenance needs; maintains records of services performed.