Current Site Information
EPA Region 3 (Mid-Atlantic)Pennsylvania
EPA ID# PAD980508766
7th Congressional District
Last Update: December 2012
Current Site Status
The U.S. Environmental Protection Agency (EPA) and Pennsylvania Department of Environmental Protection (PADEP) successfully completed the construction of the cleanup action at the Site in September 2002. The remedial cleanup action at the Moyer's Landfill site was to cap the landfill and to collect and transfer the leachate to a Publicly Owned Treatment Works for treatment.
The second Five-Year Review Report (2007) found that the remedy has been constructed in accordance with the requirements of the ROD and is functioning as designed. The immediate threats have been addressed though capping the landfill and collecting and properly disposing of the leachate. Since the Remedial Actions at both Operable Units are protective, the Site is protective of human health and the environment. Long-term protectiveness of the remedy will be maintained by continuing to perform operation and maintenance of the landfill cap and leachate collection system; monitoring the groundwater and ambient air; and enforcing the institutional controls.
Institutional controls were added into the remedy by a Second Explanation of Significant Differences, dated September 2009 and implemented when Lower Providence Township enacted an ordinance on October 20, 2011 to protect the remedy.
The Moyer's Landfill is a 65 acre inactive privately owned landfill located on Moyer Road, Collegeville, Lower Providence Township in Montgomery County, Pennsylvania. The landfill is bounded on the north and west by Evansburg State Park, to the east by a new housing development (Valley High Estates) and to the south by the new housing development and land. The landfill was closed in April 1981 after operating for nearly 40 years.
The site had been operating as a municipal landfill from the early 1940s until April 1981. The landfill accepted municipal waste, sewage, and industrial sludges such as a variety of solid and liquid hazardous wastes (e.g. polychlorinated biphenyls (PCBs), dioxins, solvents, paints, low-level radioactive wastes, and incinerated materials in bulk form and/or containerized drums). The original unlined landfill area was approximately 39 acres in size. In the late 1970s, the landfill owners submitted a request to expand the landfill boundaries to the northwest. Site preparation work began on a new area in 1977, and included installation of an asphalt liner prior to filling. Landfilling was reportedly limited to this new, lined area from late 1970s to early 1981, at which time an order from the Pennsylvania Department of Environmental Resources closed the facility.
Before the landfill was capped, contaminant transport was primarily due to surface water percolation through the landfill, some of which may have migrated into the groundwater. The exposed contaminants at the site were transported directly to the surface water bodies (Skippack Creek and Perkiomen Creek) via surface water runoff and indirectly through contaminated groundwater (upper aquifer) discharged to the creeks. The lower aquifer was not contaminated.
Since the groundwater level is lower than the bottom of the landfill, groundwater does not contribute to contaminant migration from the site.
Site ResponsibilityThis site is being addressed through federal actions.
NPL Listing HistoryThis site was proposed to the National Priorities List of the most serious uncontrolled or abandoned hazardous waste sites, requiring long-term remedial action on December 30, 1982. The site was formally added to the list on September 8, 1983.
Threats and ContaminantsEPA investigated the on- and off-site ground water, leachates, and soil. Contaminants found included heavy metals and volatile organic compounds (VOCs) from former waste disposal practices. The surface water was polluted with VOCs. PCBs were found in the trout in the surrounding streams. Leachate and affected sediments contained substantial levels of contaminants and therefore may have posed risks to individuals who accidentally ingested, inhaled, or came into direct contact with them. Drinking contaminated ground water or consuming contaminated trout also may have also posed significant threats.
Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.
In 1985, the EPA selected a remedy for controlling the source of the pollution. It included: grading and leveling the site; constructing retaining walls at highly erodible areas; capping the site with a low-permeability soil; installing a gas vent system that prevents accumulating gas from rupturing the cap; collecting surface runoff and discharging it directly into the creek; installing a leachate collection and removal system; treating collected leachate and discharging it; and continuing to monitor groundwater and surface waters. The engineering design for the cleanup remedy, undertaken by the Army Corps of Engineers, was completed in 1989. Construction of the collection trench was completed in July 1992. However, due to community concerns the landfill cap was re-designed to minimize the amount of imported soil needed.
Construction of the cap began in the Summer of 1993. The cap construction was completed in November 1994. Additional erosion and sedimentation control units were completed during early 1997, as well as the leachate pumping system. The Pennsylvania Department of Environmental Protection (PADEP) petitioned EPA to change the remedial action to leachate treatment at a Publically Owned Treatment Works. This action was not able to be implemented when the ROD was signed, but is more cost effective than the original remedy
In 2000, EPA issued an Explanation of Significant Differences to facilitate the change in the remedial action. As part of this change three actions were required: (1) construction of leachate holding tanks by the EPA; (2) updating of the leachate transfer system by PADEP; and (3) construction of a sewer line interceptor by the county. Leachate began to flow to the Publically Owned Treatment Works in September 2002, when construction at the site was completed.
PADEP is currently performing the operations and maintenance at the site. All the cleanup actions are in place and are operating as intended.