§ 421.280 Applicability: Description of the secondary tantalum subcategory
§ 421.281 Specialized definitions
§ 421.282 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
§ 421.283 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
§ 421.284 Standards of performance for new sources
§ 421.286 Pretreatment standards for new sources