A summary of the January 19-20, 1983 National Bureau of Standards Workshop on Environmental Conditions for Archival Records Storage is presented that proposes criteria and addresses control of environmental conditions in spaces used for storage of paper-based archival records. The objectives of the Workshop were to explore rationale for establishing levels of air quality for archival storage and to review equipment technology with regard to its capability to provide optimum environmental conditions for archival storage facilities. The proposed criteria gives levels of air quality for different categories of archival storage for the four environmental variables, temperature, relative humidity, gaseous contaminants, and particulate contaminants, that primarily effect paper-based archival records. Other design parameters are addressed and recommendations made regarding factors to consider in the design of archival storage facilities. The types of environmental conditioning equipment, components, and systems for providing indoor air quality for preservation of paper-based archival records are reviewed and discussed with regard to environmental variables. Methods of thermal and air quality control are discussed and recommendations made for performance evaluation of environmental conditioning systems. Monitoring and assessment procedures to evaluate performance of environmental conditioning systems and components are addressed.