The purpose of the Workshop was to identify reliable analytical-testing procedures that may be useful in the prediction of acid generation from mining wastes. EPA assembled a panel of experts in the area of acid generation measurement techniques from the regulated community, the private sector, and Federal and state regulatory agencies. The objective of the workshop was to assist EPA's Office of Solid Waste in the development of a program, under Subtitle D of the Resource Conservation and Recovery Act, that addresses wastes generated by the extraction and beneficiation of ores and minerals. In preliminary stages of development, the program clearly will have to address acid-generation potential, because acid drainage has proved to be one of the more significant long-term environmental problems at sulfide mines.