PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
- General Provisions (§§ 421.1 - 421.5)
- Subpart A—Bauxite Refining Subcategory (§§ 421.10 - 421.16)
- Subpart B—Primary Aluminum Smelting Subcategory (§§ 421.20 - 421.27)
- Subpart C—Secondary Aluminum Smelting Subcategory (§§ 421.30 - 421.37)
- Subpart D—Primary Copper Smelting Subcategory (§§ 421.40 - 421.47)
- Subpart E—Primary Electrolytic Copper Refining Subcategory (§§ 421.50 - 421.57)
- Subpart F—Secondary Copper Subcategory (§§ 421.60 - 421.67)
- Subpart G—Primary Lead Subcategory (§§ 421.70 - 421.77)
- Subpart H—Primary Zinc Subcategory (§§ 421.80 - 421.87)
- Subpart I—Metallurgical Acid Plants Subcategory (§§ 421.90 - 421.97)
- Subpart J—Primary Tungsten Subcategory (§§ 421.100 - 421.107)
- Subpart K—Primary Columbium-Tantalum Subcategory (§§ 421.110 - 421.117)
- Subpart L—Secondary Silver Subcategory (§§ 421.120 - 421.127)
- Subpart M—Secondary Lead Subcategory (§§ 421.130 - 421.137)
- Subpart N—Primary Antimony Subcategory (§§ 421.140 - 421.147)
- Subpart O—Primary Beryllium Subcategory (§§ 421.150 - 421.157)
- Subpart P—Primary and Secondary Germanium and Gallium Subcategory (§§ 421.180 - 421.187)
- Subpart Q—Secondary Indium Subcategory (§§ 421.190 - 421.197)
- Subpart R—Secondary Mercury Subcategory (§§ 421.200 - 421.207)
- Subpart S—Primary Molybdenum and Rhenium Subcategory (§§ 421.210 - 421.217)
- Subpart T—Secondary Molybdenum and Vanadium Subcategory (§§ 421.220 - 421.227)
- Subpart U—Primary Nickel and Cobalt Subcategory (§§ 421.230 - 421.237)
- Subpart V—Secondary Nickel Subcategory (§§ 421.240 - 421.247)
- Subpart W—Primary Precious Metals and Mercury Subcategory (§§ 421.250 - 421.257)
- Subpart X—Secondary Precious Metals Subcategory (§§ 421.260 - 421.267)
- Subpart Y—Primary Rare Earth Metals Subcategory (§§ 421.270 - 421.277)
- Subpart Z—Secondary Tantalum Subcategory (§§ 421.280 - 421.287)
- Subpart AA—Secondary Tin Subcategory (§§ 421.290 - 421.297)
- Subpart AB—Primary and Secondary Titanium Subcategory (§§ 421.300 - 421.307)
- Subpart AC—Secondary Tungsten and Cobalt Subcategory (§§ 421.310 - 421.317)
- Subpart AD—Secondary Uranium Subcategory (§§ 421.320 - 421.327)
- Subpart AE—Primary Zirconium and Hafnium Subcategory (§§ 421.330 - 421.337)