“…The presence of radionuclide-contaminated soils in a channel that traverses the southernmost CAS in the Plutonium Valley CA suggests that radionuclide-contaminated soil has been transported in the past during runoff events. Various studies (Colton, 1999;Shinn et al, 1993) also have indicated that radionuclide-contaminated soils have migrated by surface water transport in the past, suggesting additional surface movement of contaminated soils is possible in the future.…”