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Cinnaminson Groundwater Contamination
Cinnaminson Township, NJ

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Natalie Loney - (212) 637-3639
loney.natalie@epa.gov

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EPA added the Cinnaminson Groundwater Contamination site in Cinnaminson Township, New Jersey to the Superfund National Priorities List on June 1, 1986 because hazardous chemicals were found in the soil and ground water.  The 400-acre superfund site located in Burlington County consists of a landfill, residential and light to heavy industrial properties.  Large amounts of refuse and solid wastes were deposited  in unlined mining pits. Municipal and institutional wastes, bulky wastes, food processing wastes and industrial wastes, including hazardous substances, were deposited in two areas of the landfill.  Arsenic and volatile organic compounds (VOCs), which are potentially harmful contaminants that can easily evaporate into the air, were detected in the ground water. 

The site cleanup is being addressed in three stages.  The first stage is directed at the cleanup of the ground water contamination from the landfills at the site.  The second stage will address the effectiveness of a clay cap in reducing the generation of leachate, the contaminated liquid flowing from the site that carries with it many of the landfill’s pollutants.  The third stage is directed at other industrial facilities located at the north-western part of the site. 

EPA decided to address the contaminated ground water by pumping ground water, treating it to remove the contaminants and reinjection the treated ground water into a deep underground layer of water.  Construction of the ground water cleanup system began in 1999 and was completed in 2000.  Ground water cleanup is ongoing.  In 2009, EPA will test the soil of several homes bordering the site for VOCs. Based on the sampling results, further testing may be conducted inside homes to assess indoor air quality. 


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