Superfund Record of Decision (EPA Region 7): Midwest Manufacturing/North FarmSite, Midwest Operable Unit, Kellogg, IA. (First Remedial Action), September 1990

摘要

The 8-acre Midwest Manufacturing/North Farm site is located on a manufacturingsite owned and operated by Smith-Jones, Inc. in Kellog, Iowa. From 1973 to 1981, Smith-Jones engaged in electroplating and painting operations of manufactured products, which involved the use of TCE to clean the product before it was coated with the metal. In 1977, the State required treatment of the wastewaters to precipitate metals. Site inspections in the early 1980s, by EPA revealed elevated heavy metal concentrations. Ground water sampling revealed contamination of the alluvial aquifer underlying the site. The ROD addresses both source control and ground water remediation at the site. The primary contaminants are VOCs, including PCE, TCE, toluene, and xylenes; and metals, including chromium, and lead. The selected remedial action for the site includes installing a low permeability cap over the waste disposal cell in accordance with RCRA landfill closure requirements; treating ground water using air stripping, and possible treatment of vapor/air mixture using carbon adsorption, and filtering water to remove inorganics, if needed; discharging the treated water onsite to the Skunk River or offsite to a publicly owned treatment works (POTW); implementing institutional controls including deed and ground water use restrictions; and ground water monitoring for 30 years.