Until the Resource Conservation and Recovery Act, there were few restrictionson how hazardous waste generators could handle their waste. Owing toignorance or avarice, most dumped such waste into open lagoons or put it into barrels that were buried shallowly. Fortunately for us, most of these casual disposals have not provided long-lived dangers to our health. But many have. With the advent of Subtitle C regulations of current and future hazardous waste came the discovery of past hazardous waste disposals that posed current and future health and environmental dangers.