A professional who operates batch or continuous still to separate intermediate products or impurities from coal tar compounds. Respnsibilities include:

• Charges still and starts flow of coal tar compound through still units.
• Turns control valves and observes recording instruments and gauges to attain temperatures, material flow rate, pressure, or vacuum specified for distillation of designated product.
• May compute variances between laboratory analysis and product specifications, using prescribed formula to determine temperature and flow-rate adjustments.
• May observe gauges or use measuring rod to verify quantities of chemical materials in feed and hold tanks of still unit.
• May direct activities of helpers.
• May be designated according to product distilled as Naphthalene-Still Operator; Tar-Heater Operator.