Part 424 - FERROALLOY MANUFACTURING POINT SOURCE CATEGORY
- Subpart A - OPEN ELECTRIC FURNACES WITH WET AIR POLLUTION CONTROL DEVICES SUBCATEGORY (§§ 424.10 — 424.17)
- Subpart B - COVERED ELECTRIC FURNACES AND OTHER SMELTING OPERATIONS WITH WET AIR POLLUTION CONTROL DEVICES SUBCATEGORY (§§ 424.20 — 424.27)
- Subpart C - SLAG PROCESSING SUBCATEGORY (§§ 424.30 — 424.37)
- Subpart D - COVERED CALCIUM CARBIDE FURNACES WITH WET AIR POLLUTION CONTROL DEVICES SUBCATEGORY (§§ 424.40 — 424.47)
- Subpart E - OTHER CALCIUM CARBIDE FURNACES SUBCATEGORY (§§ 424.50 — 424.57)
- Subpart F - ELECTROLYTIC MANGANESE PRODUCTS SUBCATEGORY (§§ 424.60 — 424.67)
- Subpart G - ELECTROLYTIC CHROMIUM SUBCATEGORY (§§ 424.70 — 424.77)