A professional who collects and prepares laboratory samples of metal-bearing ores, refined metals, and other materials, such as coke, cryolite, slag, scrap, or flue dust, by any combination of following methods:

• (1) Collects samples of crushed ore, concentrates, or other material from conveyors, storage bins, carloads, or refining equipment, using sample containers or diverting mechanisms on conveyors or chutes.
• Grinds materials, using grinder mill.
• Weighs, dries, and reweighs material, using scales and oven, and computes moisture content.
• Sifts material through screen to remove oversized particles.
• Places sample in labeled containers, flasks, or bags for laboratory analysis.

• (2) Takes samples of molten metal from furnaces or casting stations, using ladle and wafer mold.
• Stamps or marks identifying information on cast wafer for delivery to laboratory.

• (3) Cuts samples of metal sheet or plate, using shears or punch.
• Saws sample sections from metal castings, plate, or rod for metallurgical analysis, using circular saw.
• Smooths cut surfaces of metal with grinder and sandpaper.
• Etches samples in acid to expose crystalline structure for spectrographic analysis.
• Drills holes in castings to obtain shavings for laboratory analysis.
• Stamps or labels samples for identification.