February 7, 2013 at
Borough of Pitman
110 South Broadway
Pitman, NJ 08071
Wanda Ayala (212) 637-3676
EPA added the Lipari Landfill site in Mantua, New Jersey to the Superfund National Priorities List on September 1, 1983 because hazardous chemicals were found in the soil and groundwater. The 16-acre site located in Gloucester County contained a six-acre landfill that accepted household waste, liquid and semi-solid chemical wastes, as well as other industrial materials between 1958 and 1971. Almost three million of gallons of liquid wastes, that included solvents, formaldehyde, paints and thinners, were dumped at the landfill. The groundwater, surface water, soil and sediments at the site were contaminated with heavy metals volatile organic compounds (VOCs), and semi-volatile organic compounds (SVOCs). These pollutants seeped into nearby marshlands, Chestnut Branch Stream, Rabbit Run Stream and Alcyon Lake (which was subsequently closed to recreational use). The air at the site was also contaminated with vapors from the VOCs.
As an immediate response, EPA installed a security fence around the site and the nearby wetlands in 1982 and developed a remedial design. In 1983, EPA constructed a landfill containment system consisting of an underground wall and a landfill cover. In 1990 EPA began construction of a groundwater treatment plant at the site. From 1992 to 2008, the landfill interior was flushed with clean water to remove soluble chemicals; contaminated water was then extracted and treated on-site, before being sent for final treatment at the county sewage treatment plant. The landfill flushing resulted in significant reductions of contaminant concentrations. In 2000, a vapor extraction and treatment system was installed on-site to clean up the landfill’s toxic vapors.
The primary responsible party, who polluted the landfill with chemical waste, cleaned up off-site contamination that migrated out of the landfill prior to the installation of the containment system. This work was done under EPA oversight and included the collection and treatment of groundwater and the excavation of contaminated soils in Chestnut Branch Marsh and Alcyon Lake. A drain was installed in the surficial Cohansey aquifer between the landfill and the marsh to capture any seepage from the landfill. An additional drain was installed in the deeper Kirkwood aquifer to capture groundwater contamination under the landfill. Alcyon Lake, which had been closed for recreational use for a number of years due to contamination, was reopened in October 1995.
The vapor treatment system continues to remove substantial amounts of contamination. Trenches and drains continuously collect contaminated groundwater that seeps out of the landfill and this groundwater is sent to the local county sewage plant for treatment. Under current conditions at this site, harmful pollutants are captured, treated and under control. Groundwater, surface water and air are monitored on a regular basis to ensure that the surrounding community and environment are not exposed to hazardous chemicals.