Subpart K. Subpart K—Primary Columbium-Tantalum Subcategory

• § 421.110 - Applicability: Description of the primary columbium-tantalum subcategory.
• § 421.111 - Specialized definitions.
• § 421.112 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
• § 421.113 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
• § 421.114 - Standards of performance for new sources.
• § 421.115 - Pretreatment standards for existing sources.
• § 421.116 - Pretreatment standards for new sources.
• § 421.117 - [Reserved]