Department of Interior - Office of Inspector General (DOI-OIG) objective asked, Does the Department have effective processes to identify, track, and prioritize hazardous sites. Office of Inspector General (OIG) of the United States Environmental Protection Agency. EPA-OIGs objective under this joint effort asked, What is EPAs process for identifying, prioritizing, and tracking hazardous waste sites, and what practices do EPA staff apply that could benefit DOIs effort to inventory hazardous sites. The body of the report contains summary information on EPA practices, as well as promising practices that DOI can use. The flowchart on page 2 depicts EPAs Superfund process as well as the scope of our evaluation, and Appendix A provides additional details on our scope and methodology. Appendices B through D provide further details on EPAs process, and include various website links that DOI and others may find useful.