A professional who assists clarifier operator in separating mud from alumina liquor and in recovering soda from mud. Respnsibilities include:

• Turns valves to flush lines.
• Turns valves to divert flow of alumina liquor through standby equipment as directed by clarifier operator.
• Reads tank gauge and records sludge levels of mud settlers and washers.
• Takes sample of mud sediments and weighs it to determine density.
• Lubricates valves and adjusts packing glands to prevent leaks, using grease gun and wrench.
• Cleans screen boxes.
• Performs other duties as described under helper master title.