§ 421.80 Applicability: Description of the primary zinc subcategory
§ 421.81 Specialized definitions
§ 421.82 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
§ 421.83 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
§ 421.84 Standards of performance for new sources
§ 421.85 Pretreatment standards for existing sources
§ 421.86 Pretreatment standards for new sources