A professional who collects samples of petroleum products from various parts of refinery for laboratory analysis, using sample container. Respnsibilities include:

• Samples contents of tank cars, processing units, stills, and pipelines by lowering sample container into contents at various depths, or by opening bleeder valves to release flow of products into container.
• Collects samples taken by other workers.
• Pours samples from containers into sample bottles and ties identification tags to bottles or marks identifying information on them.
• Delivers samples to laboratory for analysis.
• May convey messages between laboratory and processing units.
• May collect samples of other materials for laboratory analysis.