Place samples into dedicated rock core boxes constructed of wood or heavy-duty cardboard.

For quickly degradable rock types such as shales and mudstones: core recovery, 𝑅𝑅𝑅𝑅𝑅𝑅, and fracture frequency (in accordance with Chapter 4) is to be measured and recorded in the field logs as soon after as the core extraction is completed.

For intermediate materials that represent the boundary between soil and rock, or for rock that is sensitive to moisture content changes, care is highly critical. In such cases, rock core is to be wrapped in plastic wrap and/or waxed following extraction to prevent changes in moisture content prior to testing.

Record presence and depths of any voids vuggy/porous texture.

Include a photolog when reporting or along with bore logs of any core collected during field operations.