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