A professional who tends equipment, such as filters, settlers, and thickeners, to assist in concentrating chemical solution. Respnsibilities include:

• Turns valves and starts pumps to start flow of liquids from storage tanks through series of pans.
• Dumps sacks of chemicals into processing units.
• Patrols area to detect leaks and malfunctioning of equipment.
• Records data, such as temperature and pressure readings, and monitors gauges and recording charts to ensure safe operating conditions.
• Draws sample of product and tests for specific gravity, using hydrometer.
• Opens valves to drain and flush salt accumulations from pans and lines.
• Repacks pumps and valves and repairs equipment by adjusting or replacing parts, using handtools.
• Performs other duties as described under helper master title.