Editors' Summary: Just as the Environmental Protection Agency (EPA) and states, after long delays, are primed to begin final implementation of the complicated hazardous waste control provisions of the Resource Conservation and Recovery Act of 1976 (RCRA), the president has signed Amendments greatly adding to the scope and complexity of the program. The agencies must now, like Sisyphus, return to the bottom of the mountain and start the long upward trek again. Actually, their plight is less grim than his, since they need not recover the same ground. But the journey ahead could be as difficult as that completed, because the Amendments establish major new programs covering small generators of hazardous waste and underground storage tanks. And EPA will not this time be able to extend the job beyond the statutory deadlines, for Congress dictated that should the Agency miss any of a host of major regulatory deadlines, statutory "hammers" would fall putting into effect strict legislated rules. The authors survey the new challenges posed by the Amendments and analyze the impact of programs on landfill disposal, small generators, leaking underground storage tanks, imminent hazard actions, and citizen enforcement. They conclude that while Congress addressed serious environmental and regulatory problems, the tasks they have given EPA will be extremely difficult to carry out.