Any facility carrying out processes that involve cleaning with petroleum-based (non-water-based) solvents, including degreasers and solvent-based parts washers. The regulations also cover the use and disposal of solvent wetted rags to manually wipe soils from the metal surfaces (hand wiping).
Hazardous waste regulations may apply to storage and disposal; some facilities may need air emissions permits.
Anyone who generates more than 100 kilograms per month of waste that may potentially be classified as a "hazardous waste" under federal or state law. (May also apply to as little as 1 kilogram per month for certain "acutely hazardous wastes.")
Businesses are required to determine whether their wastes should be classified as "hazardous" under the regulations. Incorrect classification is a major factor contributing to violations and fines in the transportation sector.
Any discharge of locomotive coolant falls under the rules that apply to the discharge of any industrial wastewater.
Wastewater discharged from locomotive cooling systems must be hauled to an appropriate treatment facility, or a permit must be obtained, either from local authorities to discharge to a municipal sewer system, or from the EPA to discharge directly to the environment.