§ 421.140 Applicability: Description of the primary antimony subcategory
§ 421.141 Specialized definitions
§ 421.142 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
§ 421.143 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
§ 421.144 Standards of performance for new sources
§ 421.146 Pretreatment standards for new sources