Subpart M. Subpart M—Secondary Lead Subcategory

• § 421.130 - Applicability: Description of the secondary lead subcategory.
• § 421.131 - Specialized definitions.
• § 421.132 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
• § 421.133 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
• § 421.134 - Standards of performance for new sources.
• § 421.135 - Pretreatment standards for existing sources.
• § 421.136 - Pretreatment standards for new sources.
• § 421.137 - [Reserved]