A professional who tends trommel (revolving drumlike sieve) that washes copper precipitate from scrap iron. Respnsibilities include:

• Starts previously loaded trommel and turns on water sprays.
• Pumps precipitated copper and water mixture into settling tank.
• Shovels spilled scrap iron back into tank.
• Lubricates trommel bearings, and washes copper from equipment with water hose.
• May line bottom of railroad car with precut wooden boards preparatory to loading car with copper.