§ 421.310 Applicability: Description of the secondary tungsten and cobalt subcategory
§ 421.311 Specialized definitions
§ 421.312 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
§ 421.313 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
§ 421.314 Standards of performance for new sources
§ 421.315 Pretreatment standards for existing sources
§ 421.316 Pretreatment standards for new sources