Iron and steel foundry
Iron and steel foundry means a facility or portion of a facility that melts scrap, ingot, and/or other forms of iron and/or steel and pours the resulting molten metal into molds to produce final or near final shape products for introduction into commerce. Research and development facilities and operations that only produce non-commercial castings are not included in this definition.
40 CFR § 63.7765
Terms used in this subpart are defined in the Clean Air Act (CAA), in 63.2, and in this section.