[en] A study was conducted to establish radionuclide inventories and concentrations in the retired 100 Area radioactive solid and liquid waste disposal facilities, leakage areas, reactors, and associated facilities. The data are intended to aid in establishing the long-term disposition and control procedures for these facilities. The purpose of the long-term controls would be to place all facilities in a stable condition such that the possibility of polluting the environs with radioactive material or of affecting the local ecology through radiation exposure is minimized. Adequate short-term control of the contaminated deactivated 100 Area facilities and disposal sites has been established. Maintaining this radiological control requires an ongoing maintenance/surveillance program. Costs associated with this maintenance/surveillance program are expected to increase due to facility deterioration. Future stabilization and/or removal attempts to establish long-term contamination controls will be dependent upon the definition of radiological release criteria for future decommissioning activities at Hanford. Guidance on acceptable levels of surface contamination is provided in AEC Regulatory Guide 1.86 ''Termination of Operating Licenses for Nuclear Reactor.'' Only limited guidance has been provided on acceptable activity levels when radionuclides are uniformly distributed in some matrix. Battelle Northwest is establishing radiological release criteria for future decommissioning activities at Hanford as part of the ''Disposition of Retired Contaminated Facilities at Hanford'' study. Based on dose calculations, radiological release criteria are being derived that will provide long-term public protection from any residual contamination remaining in decontaminated facilities