Subpart B—Primary Aluminum Smelting Subcategory
- §421.20 Applicability: description of the primary aluminum smelting subcategory.
- §421.21 Specialized definitions.
- §421.22 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
- §421.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
- §421.24 Standards of performance for new sources.
- §421.25 [Reserved]
- §421.26 Pretreatment standards for new sources.
- §421.27 [Reserved]