In shoveling from a stockpile, which material should be obtained?

• A. All material from the pile
• B. From the interior core
• C. From the center of the pile
• D. Only material from the outermost layer

Answer: (D)

When sampling from a stockpile by shoveling, you want material that best represents what will actually be used from that pile. The outermost layer is the portion that has been most recently exposed to weather, handling, and environmental conditions, so it reflects the material that will be loaded into the process soon and is easier to sample consistently. The interior or deeper material can be more compacted, moisture-rich in pockets, or segregated in ways that don’t represent the material you’ll feed into production. By taking only from the outer layer, you minimize biases from weathering and moisture differences and get a practical, representative sample for testing and quality checks.