StacksVerified U.S. regulatory reference

Part 424 — Ferroalloy Manufacturing Point Source Category

Subpart A — Open Electric Furnaces With Wet Air Pollution Control Devices Subcategory

Subpart B — Covered Electric Furnaces and Other Smelting Operations With Wet Air Pollution Control Devices Subcategory

Subpart C — Slag Processing Subcategory

Subpart D — Covered Calcium Carbide Furnaces With Wet Air Pollution Control Devices Subcategory

Subpart E — Other Calcium Carbide Furnaces Subcategory

Subpart F — Electrolytic Manganese Products Subcategory

Subpart G — Electrolytic Chromium Subcategory