Summary

Fifth Five-Year Review Completed

The U.S. Environmental Protection Agency (EPA) Region 7 has completed the Fifth Five-Year Review for the 10th Street Superfund Site. Five-year reviews are required by the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) 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 remedies at the site are protective of human health and the environment in the short-term, because the vapor mitigation systems address vapor intrusion and existing institutional controls prevent unacceptable use of groundwater. In order to be protective in the long-term, the loss of plume capture must be assessed and addressed, and additional One Hour Martinizing (OHM) source area actions will be implemented to address residual source material and prevent further impacts to downgradient groundwater. This Five-Year Review Report was signed July 9, 2020.

EPA has assessed the ability of the public to access this Five-Year Review through an internet-based repository and has determined that the local community has this ability. As a result, the Administrative Records are available on EPA’s website (see Site Documents & Data).

Questions or requests for site information and/or the five-year review process can be submitted to: