![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Fact Sheet
November 2007
Third Five-Year Review Completed, E. I. du Pont de Nemours and Company Superfund Site (DuPont - County Road X-23), Lee County, Iowa
Introduction
The U.S. Environmental Protection Agency conducts regular five-year reviews on Superfund sites where cleanups have been completed. These reviews are required by the Superfund law [42 U.S.C. Section 9621 (c)]. EPA Region 7 and the Iowa Department of Natural Resources recently completed the third five-year review of the E.I. du Pont de Nemours and Company (DuPont- County Road X-23) Superfund Site in Lee County, Iowa.
Site Background
The Site consists of the Baier and McCarl subsites and is located approximately 3.5 miles south of West Point, Iowa.
From 1949 through 1953, an estimated 48,000 to 72,000 55-gallon drums of waste from DuPont’s paint manufacturing plant in Fort Madison, Iowa were disposed at the two subsites. In addition to drummed wastes, paint waste was placed in trenches and burned. The Baier subsite was the primary disposal area; however, during inclement weather when the Baier site was not accessible,
wastes were disposed at the McCarl subsite. Volatile organic compounds and metals contamination were found at the subsites.
Under EPA oversight from 1992 to 1993, DuPont excavated contaminated soil from both subsites and utilized a process of stabilization/solidification to treat the soil before placing all the treated soil into the excavated area at the Baier subsite. The treated soil was then covered with clean soil and grass. The Baier subsite was fenced to keep people off the site and to protect the cover.
During the previous five-year review completed in 2002 it was determined it was it no longer necessary to monitor ground water at the McCarl subsite since all waste has been removed from the property and the ground water was not contaminated. The monitoring wells were subsequently closed consistent with state regulations.
Originally restrictions were placed on both subsites to limit the land uses. In 2007 a Restrictive Covenant was implemented which limited use of the Baier subsite and lifted the use restriction for the McCarl subsite. DuPont continues to maintain both subsites.
Five-Year Review
The EPA considered a significant amount of information before concluding that the site remains safe. Inspection and maintenance reports, ground water monitoring reports, site records, and deed restrictions were reviewed. The site was inspected in July 2007.
Long-term protectiveness of the remedial action will continue to be verified through continuing inspections, maintenance, and sampling of ground water at the site. Current data from the Baier subsite indicate that the solidified soil with its clay cap is stable. Current monitoring indicates that the remedy is functioning as intended and is protective of human health and the environment. Three issues were noted in the report, and recommendations were made to address 1) scheduling of future analysis of the soil cap, 2) ground water monitoring, and 3) inspection and maintenance activities.
Since site contaminants remain captured in the solidified solid beneath the cap at the Baier subsite, and the site’s use is restricted due to the contaminants, the EPA will conduct another five-year review in 2012.
Additional Information
The Five-Year Review Report and the complete site administrative record is available at the following locations during normal business hours:
EPA Superfund Records Center
901 N. Fifth St.
Kansas City, Kan.
Cattermole Memorial Library
614 Seventh St.
Fort Madison, Iowa
Questions or requests for information can be submitted to:
Community Involvement Coordinator
EPA Region 7
901 N. Fifth St.
Kansas City, KS 66101
Toll free: (800) 223-0425
e-mail: hirter.fritz@epa.gov
