A professional who tends mill that mixes flue dust with water to settle it for shipment. Respnsibilities include:

• Opens bin outlet allowing dust to fall into mixing mill.
• Dislodges banked dust in bin by hammering sides.
• Starts mill and opens valve of water spray.
• Opens door of mill allowing moistened dust to fall onto conveyor belt leading to railroad car.
• May distribute mixture evenly in car, using shovel.