Superfund Information Systems: Site Profile

Superfund Site:

E.I. DU PONT DE NEMOURS & CO., INC. (COUNTY ROAD X23)
WEST POINT, IA

Cleanup Activities

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Background

The E.I. DuPont de Nemours & Company, Inc. (County Road X23) site consists of two subsites—Baier and McCarl—located in rural Lee County, near West Point, Iowa. Between 1949 and 1953, an estimated 48,000 to 72,000 55-gallon drums of waste generated from DuPont’s paint manufacturing facility in Fort Madison, Iowa, were disposed at the site. The wastes contaminated groundwater and soil at the two subsites with metals and organic compounds. Ash and unburned sludges were also present on the site. The site was listed on EPA’s National Priorities List (NPL) in September 1990. Following cleanup, the EPA deleted the site from the NPL in September 1995. Groundwater monitoring and cap maintenance are ongoing.

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What Is Being Done to Clean Up the Site?

The work to maintain the remedy at the site is being conducted by DuPont with oversight by EPA.

EPA has conducted four five-year reviews of the site’s remedy. These reviews evaluate whether the remedies put in place protect public health and the environment and are functioning as intended by site decision documents. The most recent review, completed in June 2012, concluded that the remedy at the site is functioning as intended and continues to be protective of human health and the environment. There were no issues identified that could affect protectiveness of the remedy. The next five-year review is scheduled for 2017.

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What Is the Current Site Status?

Cleanup activities were completed in 1993 and the EPA removed the site from the NPL in 1995. DuPont continues to maintain the soil cap and the grass at the Baier subsite, repairing any damage to the cap and ensuring the grass is healthy and mowing periodically. The area remains fenced with a locked gate to prevent trespassing. Groundwater is sampled every two years to ensure contamination has not affected the water. An environmental covenant has been placed on the deed of the Baier subsite which imposes limitations on how the property may be used in the future and serves as a notice to any future owner of the property that contaminated materials remain on site. The McCarl subsite does not have any restrictions on the deed as the wastes were removed from that property.

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EPA’s Involvement at the Site

The EPA issued a Record of Decision selecting a cleanup alternative to address contamination at the site on May 28, 1991. The remedy included stabilization and solidification of contaminated soil from both subsites into a solid “block” which was covered with a soil cap at the Baier subsite. The remedy also included groundwater monitoring and institutional controls restricting the future uses of the subsites. The Record of Decision was modified by an Explanation of Significant Differences document issued by EPA on May 11, 1992. This change stated that all of the contamination found at the McCarl subsite would be excavated and moved to the Baier subsite so that it could all be stabilized and solidified into one “block” on the Baier subsite. DuPont entered into a Consent Decree to conduct the cleanup at the site on April 23, 1992.

 


 

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