This report describes the subsurface distribution of reservoir units in rocks of Cambrian to Mississippian age in the central and southern parts of the Appalachian Plateaus province and evaluates their potential for storage of 1iquid waste. Areas of oil and gas resources, oil and gas wells, faults, tight folds, extensive fracture systems, seismic activity and the potential for the development of hydraulically induced vertical fractures need to be avoided when subsurface space is considered for injection and storage of liquid waste. 1 Potential reservoir intervals and potential confining intervals established in the study basin using this definition are grouped into six major potential reservoir units and seven major potential confining units. Many thanks are due Philip M. Brown for his continued interest, support and encouragement, and critical review of the manuscript even after his retirement from the U.S. Geological Survey.

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