A professional who controls equipment to leach out metal from ore in solution. Respnsibilities include:

• Weighs sample of solution and evaporates moisture from it, using heater.
• Reweighs sample to determine percentage of solid material in solution.
• Siphons water from solution to obtain specified concentration, following chart.
• Turns valves to feed chemicals, such as cyanide or acid, into tank of ground ore or filtered slime.
• Starts mechanical agitators and observes percolation of solution to ascertain dissolution of ore.
• Tests solution with hydrometer to determine degree of ore concentration.
• Obtains sample of solution for laboratory analysis.
• May supervise workers in loading and excavating leaching tanks.
• May tend filtering machine to separate fluids from metal.
• May tend pumps to force ground ore and solution into or from tanks.
• May lubricate equipment and clean tank with water hose.
• May heat solution in tank with steam and add premeasured amounts of solid materials, such as manganese.
• May be designated according to ore leached as Molybdenum-Leaching-Plant Operator.