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§ 421.20 |
Applicability: description of the primary aluminum smelting subcategory |
§ 421.21 |
Specialized definitions |
§ 421.22 |
Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available |
§ 421.23 |
Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable |
§ 421.24 |
Standards of performance for new sources |
§ 421.26 |
Pretreatment standards for new sources |