EPA Announces Final Cleanup Plan for Radio Materials Corp. Site in Attica, Indiana
U.S. Environmental Protection Agency announced the final cleanup plan for the remaining groundwater and soil contamination at the former Radio Materials Corp. site at 1095 East Summit St., Attica, Indiana. The plan includes permeable reactive barriers to contain and treat contaminated materials.
EPA’s final decision document also includes a plan for long-term monitoring of the area and completing soil and groundwater testing as needed. Long-term maintenance will include the implementation of institutional controls for building use restrictions at the site, as well as legal mechanisms to restrict use of soil and groundwater.
Through soil and groundwater investigations at the property, EPA determined that chlorinated volatile organic compounds had been released into the soil and groundwater. This contamination had the potential to vaporize into the air and enter nearby homes, creating a vapor intrusion risk to residents in neighborhoods west of the facility. Since 2008, EPA has overseen implementation of short-term interim measures at and near the facility, including installation of a city drinking water treatment system, a hydraulic containment and treatment system for contaminated groundwater, and vapor intrusion mitigation systems in homes west of the facility. The hydraulic containment and treatment system was retired on October 31, 2022, following the construction of a permeable reactive barrier system, which is now incorporated into the final cleanup plan.
EPA’s final decision and response to comments details the final cleanup plan for the Radio Materials Corp. property. Before finalizing the cleanup plan, EPA held a 30-day public comment period. All comments received during that period are addressed in the final decision document.
Please visit the EPA RMC website for more information and to review the cleanup plan.