Versions of 40 CFR 451.23 - Effluent limitations attainable by the application of the best conventional technology (BCT) on LawServer 2024 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2023 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2022 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2021 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2020 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2019 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2016 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2015 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2014 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT) 2009 40 CFR 451.23 – Effluent limitations attainable by the application of the best conventional technology (BCT)