A professional who controls equipment, such as washers, rectifiers, acid pots, and mixing tanks arranged in series to recover tar acids from coal-tar oils. Respnsibilities include:

• Starts pumps to circulate oil through equipment, and opens valves at various stages to treat oil with chemicals, carbon dioxide, and steam, according to specified instrument readings.
• Performs routine tests at different processing stages to determine effectiveness of treatment.
• Samples products for laboratory analysis, and interprets results of analyses to make adjustments in processing operations and to control quality and quantity of production.
• Inspects equipment for operating efficiency, lubricates equipment, and makes minor repairs and adjustments.