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Chapter 2:Applicability mobile refuelers and other non-transportation-related tank trucks, refer to Chapter4:Secondary Containment and Impracticability. 2.5.2 Railroad Cars DOT regulates railroad cars used for the transport of oil in interstate or intrastate commerce and the related equipment and appurtenances. DOT jurisdiction includes railroad cars that are passing through a facility or are temporarily stopped on a normal route. EPA regulates railroad cars under the SPCC rule if they are operating exclusively within the confines of a non-transportation-related facility. EPA regulates both transfers to or from railroad cars and when the railroad cars serve as non-transportation-related storage at an SPCC- regulated facility. When the railcar is serving as non-transportation-related storage, if the railroad car has a storage capacity above the regulatory threshold amount of oil, and there is a reasonable expectation of discharge to navigable waters or adjoining shorelines, the railroad car itself may become a non-transportation-related facility, even if no other containers at the property would qualify it as an SPCC-regulated facility.39 2.5.3 Loading/Unloading Activities DOT regulates equipment used for the fueling of locomotive units, as well as the rights-of-way on which they operate. EPA regulates the activity of loading or unloading oil in bulk into storage containers (such as those on tank trucks or railroad cars), as well as all equipment involved in this activity(e.g., a hose or loading arm attached to a storage tank system). Different requirements apply to oil transfer areas and to loading/unloading racks at a regulated facility.A transfer area is any area of a facility where oil is transferred between bulk storage containers and tank trucks or railroad cars.These areas are subject to the general secondary containment requirements in §112.7(c). If a "loading/unloading rack" (as defined in §112.2) is present, the requirements of §112.7(h) apply to the loading/unloading rack area. For more information, refer to Chapter 4:Secondary Containment and Impracticability which discusses secondary containment requirements for loading/unloading areas and racks. 2.5.4 Marine Terminals A marine terminal is an example of a "complex" subject to both U.S. Coast Guard (USCG) and EPA jurisdiction.The jurisdictional boundary of a complex facility for both USCG and EPA is defined in 33 CFR part 154, Facilities Transferring Oil or Hazardous Material in Bulk under the definition of a marine transportation- related facility (MTR facility) in §154.1020.The USCG regulates the pier structures, transfer hoses, hose-piping connection, containment, controls, and transfer piping associated with the transfer of oil between a vessel and an onshore facility. EPA regulates the tanks, internal piping, loading racks, and vehicle/rail operations that are completely within the non-transportation portion of the facility. EPA jurisdiction begins at the first valve inside secondary containment. If there is no secondary containment, EPA jurisdiction begins at the valve or manifold 39 EPA addressed the applicability of the SPCC rule to railroad cars by addressing specific scenarios in a letter to the Safety-Kleen Corporation in July 2000.See Appendix H. SPCC GUIDANCE FOR REGIONAL INSPECTORS 2-30 August 28, 2013