The 200-acre Wheeling Disposal Service site is an inactive industrial and sanitary landfill in Amazonia, Missouri. Onsite disposal features include nine solid waste trenches, five liquid waste trenches, two evaporation ponds, a farm chemical area, three tannery waste areas, and a rinsed-container area. From 1964 until the landfill was closed in 1986, municipal and industrial wastes, including tanning sludges, pesticides, asbestos, laboratory wastes, construction debris, paint sludges, battery and cyanide waste, and crushed drums were disposed of in the various onsite disposal units. EPA and the State conducted onsite and offsite investigations from 1980 to 1987 that identified the presence of onsite contamination with no evidence of offsite contaminant migration. The remedial investigation/feasibility study conducted in 1989 and 1990 confirmed these results. The Record of Decision (ROD) addresses both source control and management of contaminant migration, and is a final remedy. The primary contaminants of concern affecting the soil, sediment, ground water, and surface water are VOCs including TCE and toluene; other organics including pesticides; and metals including arsenic, chromium, and lead.