Final answer:
In archaeology, spoils should never be placed within 15 diameters of an excavation's edge to preserve the site's integrity.
Step-by-step explanation:
In archaeology, it is important to avoid placing spoils within 15 diameters of an excavation's edge. Spoils refer to excavated material that is removed from the site, such as dirt, rocks, or artifacts. Keeping spoils a safe distance away helps to preserve the archaeological context of the site and prevent damage to any remaining structures or artifacts.