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On March 28, 1979, began to experience a partial core meltdown in Unit 2 of the Three Mile Island Nuclear Generating Station in Dauphin County. Metropolitan Edison Company (Met Ed) dumped 40,000 gallons of industrial waste water with radioactive Xenon into the Susquehanna river, and state officials quickly gave permission to dump 400,000 more. At this point, plant officials said the possibility of a meltdown was over.