A professional who tends acidulation tanks and auxiliary equipment that separate undesirable compounds from oils. Respnsibilities include:

• Turns valves to fill tanks with basic materials and to admit prescribed amounts of sulfuric acid and caustic.
• Starts agitator that mixes and separates ingredients.
• Starts pumps or opens drain valve to transfer separated material into storage tanks.
• May draw sample to test for pH volume, using titration test.