noun
construction waste soil; surplus excavation soil
Refers to soil generated from construction or excavation that is not reused on-site and must be disposed of or managed.
建設残土の処理には多額の費用がかかる。
Disposing of construction waste soil is expensive.
この現場から出た建設残土は、別の工事で再利用された。
The surplus excavation soil from this site was reused in another project.
残土 is a broader term for leftover soil from any earthwork, while 建設残土 specifically refers to soil from construction activities.
Compound of 建設 (construction) and 残土 (residual soil).