Preface -- Background -- Approach -- Method -- Determination of data needs -- Databases to be searched and information needed from each database -- Merging and integrating process -- Results -- Noncompliance approach -- Sic code approach -- Discussion -- Conclusions -- Appendix: Sic criterion In recent years, the NEIC has developed a number of reports describing procedures to identify priority pollution sources (1) within a defined geographic area (e.g., Overview of Environmental Pollution in the Kanawha Valley, West Virginia - August 1984) and (2) within a selected source categroy (e.g., EPA-300/1-84-003, Multi-Media Priority Ranking of Selected Federal Facilities, Region VIII, September 1984). The procedures described in this report have beeen developed for similar purposes, but with two major differences: the primary audience is the Office of Regional Counsel and the universe of sources (i.e., for an entire Region) is the most ambitios scale yet undertaken by the NEIC. These procedures provide for the access of readily available data from EPA national systems, the merging of these data from the individual databases into an integrated summary list, and a rationale to prioritize or rank individual facilities. The procedures were developed to maximize computer processing of the data and to negate any manual data entry or manipulation of the data. The tabular results of these procedures should be considered as an information base for use by the Offices of Regional Counsel. They should be considered potential enforcement and inspection targets, not a "hit" list, as the title of the report explicitly states. They should be used as an independently derived starting point for the Offices of Regional Counsel to participate in any dialogue associated with establishing Regional enforcement and inspection priorities.