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A "transportable peaking power plant" is a transportable electrical power generation facility brought on-site on flatbed trailers and left on the trailer or placed on steel skids for a temporary period, which can be for a particular peak season or from season-to-season. A transportable peaking power plant is not permanently installed and its main function is the provision of supplemental power to the electrical distribution system or transmission grid during periods of peak demand. The maximum number of annual hours of operation of a transportable peaking power plant is restricted by a Bay Area air quality management district permit and typically does not exceed five hundred hours. A transportable peaking power plant is typically on-site for up to three years, but one or more such power plants can be installed on-site for a given peak period, then removed. (Ords. 26388, 26456.)