Subpart B. 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]