Concerned Citizens for Nuclear Safety, Honor Our Pueblo Existence, and Veterans for Peace (“Petitioners”) filed a petition for review with the Environmental Appeals Board (“Board”) challenging a National Pollutant Discharge Elimination System (“NPDES”) permit decision by the U.S. Environmental Protection Agency Region 6 (“Region”). The Region issued the NPDES permit to the U.S. Department of Energy, National Nuclear Security Administration and Triad National Security L.L.C in March 2022 pursuant to the Clean Water Act (“CWA”).