Public Health Assessment for Mason City Coal Gasification Plant, Mason City,Cerro Gordo County, Iowa, Region 7. CERCLIS No. IAD980969190

摘要

The Mason City Coal Gas site is a former manufactured gas plant (FMGP) locatednear the center of Mason City, Iowa. Following the availability of natural gas, the gas plant was decommissioned in 1951, and was subsequently demolished in 1952. Contaminants of concern identified from previous investigations at the site include polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs)--primarily benzene, toluene, ethylbenzene, and xylenes (which combined are referred to as BTEX)--phenols, cyanide, and various heavy metals that also occur naturally in soils. No completed exposure pathways to site contaminants leading to adverse health effects have been identified. Potential exposure pathways, however, exist under current site conditions.