Abstract
The state-of-the-art of borehole plugging of abandoned oil wells and the tools and materials used are discussed. Special problems encountered are considered and several case studies are outlined. The special procedures which must be followed if the plugged borehole is to be considered as a repository for radioactive wastes are discussed and special recommendations are made. A state-by-state summary is given of the regulatory requirements for borehole plugging. (JSR)

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