A land disposal unit, or LDU, is a site in which hazardous waste is remedied through natural and man-made processes. "Land disposal" of hazardous waste is defined in the U.S. Resource Conservation and Recovery Act (RCRA).United States. Resource Conservation and Recovery Act. Section 3004(k), "'Land disposal' defined." . Types of LDUs for hazardous waste disposal: Landfill Surface impoundment Waste pile Land treatment unit Injection well Salt dome formation Salt bed formation Mine Cave.
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