CCR unit means any CCR landfill, CCR surface impoundment, or lateral expansion of a CCR unit, or a combination of more than one of these units, based on the context of the paragraph in which it is used. This term includes both new and existing units, unless otherwise specified.
40 CFR § 257.53
The following definitions apply to this subpart. Terms not defined in this section have the meaning given by RCRA.