The U.S. Environmental Protection Agency (EPA) conducted a study of facilities which manage industrial waste in surface impoundments. Part of the study was mandated by Congress under the 1996 Land Disposal Program Flexibility Act. Congress asked EPA to characterize risks posed by managing wastewaters in surface impoundments that are regulated under the Clean Water Act, and to determine whether existing regulations adequately address risks that may be present. The scope of the study covered industrial wastewaters. The study did not, however, cover wastewaters that are classified as hazardous wastes under the federal Resource Conservation and Recovery Act (RCRA). EPA characterized the population of nonhazardous waste surface impoundments in the United States and estimated the potential human health and ecological risks from chemical releases from nonhazardous surface impoundments. EPA used mathematical models to represent the transport of chemicals from entry into surface impoundments to their uptake by a human or ecological receptor. While the models are simplified representations of the complex biological, chemical, and physical processes occurring in the impoundments and the environment, the models require considerable data.
This action was approved under OMB control number 2050-0157, which expired 12/31/2001.
The questionnaire was distributed November 2, 1999.
For more information on the Surface Impoundment Survey, please visit: