The document, presented in four volumes, provides guidance to owners or operators of hazardous waste management facilities as to the conduct of the second phase of the RCRA Corrective Action Program, the RCRA Facility Investigation (RFI). Volume IV of the RCRA Facility Investigation Guidance contains case studies selected to illustrate various concepts and procedures described in Volumes I, II, and III. These case studies are provided to explain, through example, how various tasks can be conducted during RFIs. The case studies also identify some of the potential problems that can occur if the RFI sampling and analytical problems are not carefully designed and executed. The case studies, however, should not be used as the primary source of guidance for RFI program design and conduct. Volumes I, II, and III should be consulted. Most of the case studies are based on actual sites. In some cases, existing data have been supplemented with hypothetical data to illustrate a particular point.

"Waste Management Division, Office of Solid Waste." "July 1987." "OSWER Directive 9502.00-6C." "EPA-530/SW-87-001."