Dump, pour, or load specified amounts of refined or unrefined materials into equipment or containers for further processing or storage.
Operate machines to process materials in compliance with applicable safety, energy, or environmental regulations.
Monitor material flow or instruments such as temperature or pressure gauges, indicators, or meters to ensure optimal processing conditions.
Turn valves or move controls to admit, drain, separate, filter, clarify, mix, or transfer materials.
Set up or adjust machine controls to regulate conditions such as material flow, temperature, or pressure.
Examine samples to verify qualities such as clarity, cleanliness, consistency, dryness, or texture.
Start agitators, shakers, conveyors, pumps, or centrifuge machines.
Inspect machines or equipment for hazards, operating efficiency, malfunctions, wear, or leaks.
Measure or weigh materials to be refined, mixed, transferred, stored, or otherwise processed.
Test samples to determine viscosity, acidity, specific gravity, or degree of concentration, using test equipment such as viscometers, pH meters, or hydrometers.