A professional who tends distillation units and auxiliary equipment to separate volatile chemical compounds into specified components, performing combination of following tasks under direction of equipment operator. Respnsibilities include:

• Turns valves and starts pumps as directed.
• Records temperature, pressure, and flow indicator readings.
• Measures liquid in tanks, using gauging rod or tape, and draws samples for laboratory analysis.
• Inspects pipes for leaks.
• Moves controls to start semiautomatic still auxiliaries, such as heat exchangers, stripping columns, vaporizers, flash tanks, and condensers, and to maintain specified operating equilibrium in equipment as directed.
• Assists still operator, batch or continuous in transferring equipment and materials.
• Cleans equipment, using hose, brushes, and scrapers.
• May tend equipment to produce gas leak detectant odorants and be designated Second Operator.