[en] This report assesses the potential environmental effects of the restart of L-Reactor on air and water quality, ecological systems, health risk, archeological resources, endangered species, and wetlands. This volume contains appendices on: (1) need for defense nuclear materials, planned production activities, and production alternatives; (2) radiation dose calculation methods; (3) ecology; (4) radiocesium and radiocobalt inventory and transport; (5) archeological and historic resources; (6) subsurface hydrology; (7) environmental impact of postulated accidents; (8) offsite emergency planning; (9) floodplains/wetlands assessment; (10) SRP reactor safety evolution; (11) scoping comments; and (11) assessment of preferred cooling-water alternative