Structural components
Structural components mean liners, leachate collection and removal systems, final covers, run-on and run-off systems, inflow design flood control systems, and any other component used in the construction and operation of the CCR unit that is necessary to ensure the integrity of the unit and that the contents of the unit are not released into the environment.
Source
40 CFR § 257.53
Scoping language
The following definitions apply to this subpart. Terms not defined in this section have the meaning given by RCRA.