Existing portion means that land surface area of an existing waste management unit, included in the original Part A permit application, on which wastes have been placed prior to the issuance of a permit.
Waiting Period shall have the meaning set forth in Section 2.2.
Vested Portion means, at any time, the portion of an Option which has become vested, as described in Section 3 of this Agreement.
Closed portion means that portion of a facility which an owner or operator has closed in accordance with the approved facility closure plan and all applicable closure requirements. (See also “active portion” and “inactive portion”.)
Active portion means that portion of a facility where treatment, storage, or disposal operations are being or have been conducted after May 19, 1980, and which is not a closed portion. (See also “closed portion” and “inactive portion.”)