👉 The term "backfill" is often used in the context of environmental remediation to refer to the process of removing soil, rock, or other debris from a contaminated site. Backfilling typically involves replacing the material with a new layer that has been removed and processed, such as sand or gravel, to improve the soil's quality and prevent further contamination. Backfilling is important in many environmental remediation projects because it can help to mitigate the effects of soil erosion and other problems caused by contaminated