American Chemical Service, Inc., recycled chemicals in Griffith, Indiana, from 1958 to 1975, when it voluntarily stopped using two disposal areas on-site and covered them.
The U.S. EPA has determined that the groundwater in the upper aquifer beneath the property is contaminated with high levels of VOCs such as benzene, toluene, chloromethane, xylene, and vinyl chloride.
The proposed cleanup remedy consists of groundwater pump and treat technology and incorporates a subsurface barrier wall. Buried VOCs will be extracted, using sitewide Soil Vapor Extraction (SVE) technology, and soil caps will be placed on the surface to prevent access to contaminated areas. The barrier wall will help to contain wastes in place. Intact, buried drums will be removed to an offsite incineration facility for disposal.
The U.S. EPA and the potentially responsible parties came to a cleanup agreement, termed a Consent Decree, in January 2001. Under the decree, some SVE and all intact drum removal activities were carried out beginning in 2001; the rest of the SVE work will continue through 2005 or longer. Also in 2001, the contaminated parts of the adjacent wetlands were excavated and consolidated onsite.