A professional who tends agitation tanks that mix copper ore slime and acid solution preparatory to precipitation of copper. Respnsibilities include:

• Turns valves to regulate flow of slime and sulfuric acid from storage tanks into agitation tanks.
• Tests samples of solution for alkalinity or acidity, using filter paper, or by means of titration.
• Combines samples of solution from various stages of process for laboratory analysis.
• May dry, grind, or screen combined sample.