The purpose of the document is to familiarize new Remedial Project Managers (RPMs) with their roles and responsibilities in the Superfund remedial program. It also can serve as an orientation to the Superfund remedial program for EPA program staff, and the public. It is not intended to be a training document. EPA has developed other materials and conducts courses specifically for training purposes. The Acme Waste Disposal Co. site, the people, and the events described in the document are hypothetical and were created to depict the cleanup of an abandoned hazardous waste site. The example illustrates typical Superfund remedial response activities and was written to demonstrate specifically the important role of the RP in managing site cleanup and in coordinating the various participants. Key terminology and concepts appear in bold face. For simplicity, the example depicted in the Primer is a Fund-financed, Federal-lead project from start to finish. In reality, a project may switch from Fund- to Enforcement-lead, and from Federal- to State-lead during the remedial process, thereby altering roles of the participants. In addition, the example portrays the RPMs involvement with only one site, when an RPM actually may be involved with several concurrent projects.