Life-of-the-unit, firm power contractual arrangement means a unit participation power sales agreement under which a utility or industrial customer reserves, or is entitled to receive, a specified amount or percentage of nameplate capacity and associated energy from any specified unit and pays its proportional amount of such unit's total costs, pursuant to a contract:
Commercial unit means such a unit of goods as by commercial usage is a single whole for purposes of lease and division of which materially impairs its character or value on the market or in use. A commercial unit may be a single article, as a machine, or a set of articles, as a suite of furniture or a line of machinery, or a quantity, as a gross or carload, or any other unit treated in use or in the relevant market as a single whole.
Vapor balance system means a combination of pipes or hoses which create a closed system between the vapor spaces of an unloading tank and a receiving tank such that vapors displaced from the receiving tank are transferred to the tank being unloaded.