2024 40 CFR 268.4 – Treatment surface impoundment exemption

2023 40 CFR 268.4 – Treatment surface impoundment exemption

2022 40 CFR 268.4 – Treatment surface impoundment exemption

2021 40 CFR 268.4 – Treatment surface impoundment exemption

2020 40 CFR 268.4 – Treatment surface impoundment exemption

2019 40 CFR 268.4 – Treatment surface impoundment exemption

2016 40 CFR 268.4 – Treatment surface impoundment exemption

2015 40 CFR 268.4 – Treatment surface impoundment exemption

2014 40 CFR 268.4 – Treatment surface impoundment exemption