Which ground type is NOT listed as eligible for performing the standard count?

• A. Asphalt
• B. Concrete
• C. Gravel
• D. < >100 pcf material

Answer: (C)

Gravel isn’t eligible because the standard count works best with materials that have predictable, uniform density and composition. Asphalt and concrete are manufactured with consistent properties, so their quantities can be reliably estimated using standard counting methods. Materials with a unit weight over 100 pounds per cubic foot are dense enough that their volume and weight can be consistently inferred as well. Gravel, being a natural and highly variable material with fluctuating moisture and compaction, doesn’t have that same consistency, so it isn’t listed as eligible for performing the standard count.