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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Oct 01, 2023
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Title 40
Chapter I
Part 421
Subpart E - Subpart E—Primary Electrolytic Copper Refining Subcategory
§ 421.50 - Applicability: Description of the primary electrolytic copper refining subcategory.
§ 421.51 - Specialized definitions.
§ 421.52 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
§ 421.53 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
§ 421.54 - Standards of performance for new sources.
§ 421.55 - [Reserved]
§ 421.56 - Pretreatment standards for new sources.
§ 421.57 - [Reserved]
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