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U.S. Code of Federal Regulations

Regulations most recently checked for updates: May 21, 2025

All TitlesTitle 40Chapter IPart 451Subpart A - Subpart A—Flow-Through and Recirculating Systems Subcategory
§ 451.10 - Applicability.
§ 451.11 - Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).
§ 451.12 - Effluent limitations attainable by the application of the best available technology economically achievable (BAT).
§ 451.13 - Effluent limitations attainable by the application of the best conventional technology (BCT).
§ 451.14 - New source performance standards (NSPS).
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