Near-surface disposal places waste at or within a few tens of metres of the surface, and relies on institutional control for a limited period after closure.
Geological disposal places waste several hundred metres deep in stable rock, so that safety does not depend on anyone remaining to manage the site.
Disposal is not storage. Storage assumes retrieval; disposal does not. Confusing the two in Korean — 처분 and 저장 — changes the meaning of the entire sentence.