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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 415
Subpart AW - Subpart AW—Oxygen and Nitrogen Production Subcategory
§ 415.490 - Applicability; description of the oxygen and nitrogen production subcategory.
§ 415.491 - Specialized definitions. [Reserved]
§ 415.492 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
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