Aug 11, 2014

EPA Finalizes Plan to Address Closed Landfills in New Jersey

EPA decides no further action needed to address the capping of two closed landfills

The U.S. Environmental Protection Agency (EPA) has finalized its determination that no further action is needed to address the capping of two closed landfills at the Cinnaminson Groundwater Contamination Superfund site in the townships of Cinnaminson and Delran, N.J. The site, which covers approximately 400 acres, includes residential and industrial properties and the two landfills. As a result of historic operations throughout the site, the groundwater and soil were contaminated with volatile organic compounds and heavy metals, which can have serious health effects. EPA will require that the groundwater associated with the landfills continues to be monitored and treated, if necessary.

EPA held a public meeting in Cinnaminson on May 12, 2014, to explain its plan. The agency took public comment for 30 days and considered public input before finalizing its decision.

To date, the landfills have been covered with protective caps to prevent water from flowing through them, and a system has been constructed to collect gas generated from the them. In addition, contaminated groundwater in the area had been pumped and then treated to prevent contaminants from spreading. An assessment regarding the continued operation of the groundwater extraction and treatment system is ongoing. The local drinking water supply is monitored regularly to ensure that water meets drinking water standards and is safe to consume, which it currently is.

EPA determined that no further actions with respect to the capping of the landfills are needed because the actions already taken are effective. It reviewed conditions at the site and has determined that the threat of further release of contaminants from the landfills to the groundwater has been addressed. Groundwater monitoring conducted over the past 26 years confirms the effectiveness of the previous capping of the landfills.

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