A professional who tends equipment to separate starch from ground potatoes, and adds chemicals to resulting solution to produce starch of specified purity. Respnsibilities include:

• Flushes shaker screen containing ground potatoes, using water hose, to remove foreign matter and form crude starch suspension.
• Turns valves to admit suspension and water to settling and rewash tanks in which impurities rise to surface, forming scum.
• Turns valves to transfer scum (brown starch) to starch tables and settling tanks until all white starch has been separated.
• Drains salvaged starch into vat, starts agitator, and adds equal volume of water to form white starch suspension prior to drying.
• Determines acidity, viscosity, and bacteria content of suspension, using pH meter and viscometer.
• Adds measured amounts of specified chemicals to further purify and preserve product.