The U.S. Environmental Protection Agency (EPA) plans to clean up a polluted 400-acre South Jersey superfund site that emits “harmful vapors.” The Cinnaminson Groundwater Contamination site, polluted by two former landfills, spread over four areas of the site. The remediation plan calls for digging up soil and treating groundwater due to concerns the groundwater may be reaching the Delaware River. The EPA first discovered contaminated groundwater in the 1980s while plans were underway to close the landfills bordered by Union Landing Road, U.S. Route 130, River Road, and Taylors Lane. The EPA plans to inject chemicals into the contaminated groundwater and monitor for vapors using a system similar to those used to detect radon in homes.