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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 40
Chapter I
Part 454
Subpart E - Subpart E—Essential Oils Subcategory
§ 454.50 - Applicability; description of the essential oils subcategory.
§ 454.51 - Specialized definitions.
§ 454.52 - Effluent limitations and guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
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