A multi-media priority ranking system was developed to evaluate selected Region V Federal facilities according to their relative potential for having environmental problems. The system was developed to use readily available information in a rapid and objective manner to identify "high priority" facilities for further detailed evaluation by EPA. The ranking system was not designed to compare a facility rating with any fixed number to indicate whether a facility is environmentally "good" or "bad". Rather, the rating indicates a facility's potential, relative to other installations, for having major environmental problems (i.e., a high rating indicates that a facility has a relatively high potential for environmental problems), and that further evaluation, if not already completed, may be warranted. Rating criteria were developed and used to rate facilities according to the type and intensity of facility activities which could actually or potentially result in environmental contamination.