Subpart U. Subpart U—Primary Nickel and Cobalt Subcategory
- § 421.230 - Applicability: Description of the primary nickel and cobalt subcategory.
- § 421.231 - Specialized definitions.
- § 421.232 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
- § 421.233 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
- § 421.234 - Standards of performance for new sources.
- § 421.235 - [Reserved]
- § 421.236 - Pretreatment standards for new sources.
- § 421.237 - [Reserved]