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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Oct 01, 2023
All Titles
Title 40
Chapter I
Part 421
Subpart U - Subpart U—Primary Nickel and Cobalt Subcategory
§ 421.230 - Applicability: Description of the primary nickel and cobalt subcategory.
§ 421.231 - Specialized definitions.
§ 421.232 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
§ 421.233 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
§ 421.234 - Standards of performance for new sources.
§ 421.235 - [Reserved]
§ 421.236 - Pretreatment standards for new sources.
§ 421.237 - [Reserved]
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