Job Description:

• 1) Tends kettle that refines grease according to specifications: Moves lever to admit grease into kettle and opens valve to admit steam into grease to control boiling.

• 2) Draws off sample of grease and inspects it for clarity.

• 3) Starts pump to add required amounts of acid to kettle and boils grease with acid until grease reaches specified clarity.

• 4) Closes steam valve and allows water and impurities to settle to bottom of kettle.

• 5) Opens valve to drain off water and impurities.

• 6) Closes drain valve, opens steam valve, and starts pump to fill kettle with water.

• 7) Boils mixture for specified amount of time to wash out acid and remaining impurities.

• 8) Opens drain valve to drain off water and impurities.

• 9) Pumps grease to storage tanks.