Technology which covers contaminated sediment with material to isolate the contaminants from the surrounding environment.

Remedy Selection for Contaminated Sediments (CS-2)
Section 5.0 (Conventional and Amended Capping)
Details the process of placing a clean layer of sand, sediments or other material over contaminated sediments in order to mitigate risk posed by those sediments.

Mining Waste Treatment Technology Selection (MW-1)
Capping, Covers, and Grading Section
Provides an overview of capping and describes how capping of solid mining waste is an effective and proven treatment technology.