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EMMELL’S SEPTIC LANDFILL SUPERFUND SITE Interim Groundwater Remedy Construction

EMMELL’S SEPTIC LANDFILL SUPERFUND SITE Interim Groundwater Remedy Construction. Galloway Township, New Jersey. SITE HISTORY. The Emmell’s Septic Landfill Site is located at 128 South Zurich Avenue in Galloway Township, Atlantic County, New Jersey (See Figure 1).

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EMMELL’S SEPTIC LANDFILL SUPERFUND SITE Interim Groundwater Remedy Construction

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  1. EMMELL’S SEPTIC LANDFILL SUPERFUND SITEInterim Groundwater Remedy Construction Galloway Township, New Jersey

  2. SITE HISTORY • The Emmell’s Septic Landfill Site is located at 128 South Zurich Avenue in Galloway Township, Atlantic County, New Jersey (See Figure 1). • From 1965 through 1979, the site was used for disposal of septic wastes and sewage sludge, which were disposed of in trenches and lagoons. • Other wastes, including chemical wastes, drums of paint sludge, gas cylinders, household garbage and construction debris, were also disposed of at the site. • Operations at the site ceased in August 1979.

  3. SUPERFUND INVESTIGATION AND CLEANUP HISTORY • The site was placed on EPA’s National Priorities List (NPL) in July 1999, making it eligible to receive federal funding for Superfund cleanup. • From July 1999 through February 2000, EPA performed a removal action at the site, which resulted in the excavation and off-site disposal of 435 drums of waste, eleven compressed gas cylinders, and approximately 28,000 cubic yards of contaminated soil. In addition, EPA installed a water treatment system at a residence which had been impacted by site-related groundwater contamination. • From February 2000 through September 2003, EPA conducted a Focused Feasibility Study (FFS) to determine whether it was appropriate to implement an interim remedy for groundwater contamination while the site-wide investigation was being conducted.

  4. SUPERFUND INVESTIGATION AND CLEANUP HISTORY • Groundwater investigations conducted during the FFS indicated that residential wells in the vicinity of the site were in danger of being impacted by site-related groundwater contamination. Therefore, during the Summer of 2003, EPA connected 36 residences to the municipal water supply. • From the Summer of 2002 through September 2008, EPA conducted the site-wide Remedial Investigation and Feasibility Study to define the nature and extent of groundwater and soil contamination and to evaluate options for cleanup of the contamination.

  5. RI/FS FINDINGS • The groundwater aquifer in the vicinity of the site consists of three distinct layers: the sand-rich shallow zone, a discontinuous clay-rich low permeability layer, and the sand-rich deep zone. • Groundwater in the vicinity of the site flows to the east. • A groundwater contaminant plume, comprised of volatile organic compounds (VOCs) extends approximately 0.5 miles east of the site property in the shallow zone of the aquifer. • A groundwater contaminant plume, comprised of VOCs, extends approximately 1.26 miles east of the site property in the deep zone of the aquifer. • Non-aqueous phase liquid, which could serve as a continuing source of groundwater contamination, was not detected beneath the site property. • Surface soil samples collected from the site contained polychlorinated biphenyls at concentrations which exceed cleanup standards

  6. INTERIM GROUNDWATER REMEDY • In September 2003, EPA signed a Record of Decision (ROD) which selected an interim groundwater remedy for the site. The components of this remedy are as follows: • Extraction of contaminated groundwater, as necessary to control migration of contaminants off of the site property; • Treatment of extracted groundwater using a treatment system that will include an air stripper, for removal of VOCs; and • Discharge of the treated groundwater to a recharge basin to be constructed at the site. • The conceptual design of the interim groundwater remedy was considered complete in September 2007. • The detailed design of the interim groundwater remedy was essentially complete in April 2009. • EPA has entered into an Interagency Agreement with the U.S. Army Corp of Engineers for construction of the interim groundwater remedy.

  7. INTERIM GROUNDWATER REMEDY SITE LAYOUT • One extraction well located at the eastern portion of the site property will be used to extract up to 150 gallons per minute of impacted groundwater. • The extracted groundwater will be treated in a 70-foot by 120-foot metal building, to be constructed on the easternmost portion of the site property. The extracted groundwater will be treated to meet New Jersey Groundwater Quality Standards. • The treated groundwater will be pumped to two infiltration basins, to be constructed on the westernmost portion of the property. The bottom dimension of each basin will be 50 feet by 100 feet. • The existing site access road will be improved and extended to the treatment building. • An additional access road will be constructed from Zurich Avenue to access the two infiltration basins. • Fencing will be installed around the treatment building, the infiltration basins and the access roads.

  8. GROUNDWATER TREATMENT PROCESS • The extracted groundwater is treated to remove iron, which can foul the process piping and equipment; • After removal of iron, the groundwater is passed through an air stripper which transfers volatile contaminants from the groundwater to the air stream; • The treated groundwater is then passed through granular activated carbon to remove trace levels of contaminants before discharge to the infiltration basins; • The resulting air stream is treated with granular activated carbon and potassium permanganate to remove and destroy volatile contaminants before discharge to the air. • The removed iron is dewatered and dried prior to off-site disposal.

  9. INTERIM GROUNDWATER REMEDY: ADDITIONAL FACTS • The installation of the infiltration trenches and the access roads will involve the excavation of soil which is contaminated with polychlorinated biphenyls. This soil will be disposed of at an appropriate off-site landfill. • The building which contains the groundwater treatment system will be sized so that it can accommodate expansion of the treatment system to handle the additional volume of groundwater to be treated as part of the final groundwater remedy.

  10. INTERIM GROUNDWATER REMEDY:SCHEDULE • Fieldwork for construction of the interim groundwater remedy will be initiated in July 2009. • Access roads and stormwater infiltration basins will be constructed in July and August 2009. • The treatment building foundation and underground utilities are scheduled for installation from July through October 2009. • Treated groundwater piping and the infiltration basins are scheduled for installation in October and November 2009. • The treatment building is scheduled for installation in November and December 2009. • Installation of the treatment system is scheduled to occur from December 2009 through May 2010. • System startup is anticipated in June 2010.

  11. For additional information concerning the site, please contact: Joe Gowers, Project Manager 1-212-637-4413 or Cecilia Echols, Community Involvement Coordinator 1-800-346-5009 Additional site information, including this presentation, can also be found on the internet at: www.epa.gov/region02/superfund/npl/emmells/

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