This Subpart applies to reclamation activities at landfills regulated pursuant to this Part. For purposes of this Subpart, landfill reclamation is defined as excavation of a portion or all of a landfill with the goal of reducing landfill volume through separation of materials into recyclable, reusable, and combustible components; reducing closure and post-closure costs by complete or partial removal of the landfill; creating capacity; or reducing environmental impacts.