Energy Storage Resource means a resource capable of receiving electric energy from the grid and storing it for later injection to the grid that participates in the PJM Energy, Capacity and/or Ancillary Services markets as a Market Participant.
Energy storage system means a system which stores energy and releases it in the same form as was input.
Ozone season means the period beginning May 1 of a calendar year and ending on September 30 of the same year, inclusive.
Underground storage tank or “UST” means any one or combination of tanks (including underground pipes connected thereto) that is used to contain an accumulation of regulated substances, and the volume of which (including the volume of underground pipes connected thereto) is 10 percent or more beneath the surface of the ground. This term does not include any:
Storage tank means an aboveground storage tank or underground storage tank as defined by this Regulation.