Public Notice: Ralston Superfund Site, Cedar Rapids, Linn County, Iowa

Summary

Fifth Five-Year Review Completed

The U.S. Environmental Protection Agency (EPA) Region 7 has completed the Fifth Five-Year Review for the Ralston Superfund site. Five-Year Reviews are required by the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), commonly known as Superfund, when hazardous substances remain on-site above levels that permit unrestricted use and unlimited exposure. Five-Year Reviews provide an opportunity to evaluate the site remedy to determine whether it remains protective of human health and the environment.

This Five-Year Review found that the remedy at the site protects human health and the environment in the short-term because engineering- and groundwater-use controls effectively prevent unacceptable exposure to soil and groundwater. The environmental covenant on Rockwell Collins’ property ensures long-term protection by preventing damage or alteration to a portion of the remedy. 

To be protective in the long-term, the EPA recommends implementing similar covenants on the two adjacent properties where the disposal area cap overlaps. Additionally, per- and polyfluoroalkyl substances (PFAS) sampling should be continued to better characterize its extent.

Site project information and the Five-Year Review are available to the public at web repositories. To view cleanup documents, please visit EPA’s Site Profile page (see Reports and Documents). 

If you have questions about the site, please contact:

Shaylee Borcsani
Community Involvement Coordinator
U.S. EPA Region 7 (CEERD/CPSIB)
11201 Renner Boulevard
Lenexa, KS 66219
Email: borcsani.shaylee@epa.gov
Phone: 913-551-7713
Toll-free: 1-800-223-0425