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What items are covered by the term "rolling stock"?

The definition of "facility" under EPCRA Section 329 states that "(f)or purposes of Section 304, term [i.e., facility] includes motor vehicles, rolling stock, and aircraft."  The term "rolling stock" is not defined further.  For purposes of EPCRA Section 304, what items are covered by the term "rolling stock"?

The term "rolling stock" is a generic term that is used in the railroad industry to denote anything on rail wheels.  The term includes locomotives, freight cars, flat cars, and other vehicles that use steel wheels on railroad tracks.  For purposes of EPCRA Section 304 reporting, EPA interprets "rolling stock" to be the same items that fall within the scope of the generic term as commonly understood by the railroad industry.