Superfund Record of Decision (EPA Region 7): Todtz, Lawrence Farm, IA. (First Remedial Action), November 1988

摘要

The 2.7-acre Dupont Impoundment of the Todtz Farm site is located on a 120-acre farm 1.25 miles west of Camanche, Iowa. Originally a sand and gravel mine, the landfill received municipal waste from 1969 to 1975. Dupont disposed of an estimated 4,300 tons of wet end cellophane process wastes from 1971 until its closure in 1975. Impoundment wastes are periodically in direct contact with the ground water beneath the site, which flows southeasterly toward the Mississippi River. Domestic wells and the municipal water supply wells for Camanche located downgradient of the site may be affected by contamination from the site. In addition, several ponds and lakes in the vicinity are potential receptors for contaminated runoff and recharge. The primary contaminants of concern affecting the ground water are VOCs including toluene and benzene, and metals including arsenic, lead, and chromium. The selected remedial action for the site includes installation of a soil cover over the Dupont Impoundment; implementation of institutional controls including deed and land use restrictions; provision of an alternate water supply for an affected residence by relocating an existing well; and groundwater monitoring.