Congressional District # 08
SKINNER LANDFILLEPA ID# OHD063963714
Last Updated: January, 2015
The 78-acre Skinner Landfill site is located on a ridge above the east fork of Mill Creek in West Chester, Ohio. The landfill accepted hazardous and demolition wastes starting in the late 1950s. The actual landfill area covers approximately ten acres and includes a lagoon less than one acre in size. The lagoon contains hazardous waste and approximately 100 drums of solvents, pesticides, and heavy metals. Approximately 40 feet of demolition material are on top of this lagoon. Demolition waste was accepted until July 1990. The remaining sixty acres of the site contain scrap metal, the owner's residence, and buildings used by the owner for his general contracting business. Waste disposed at the landfill was municipal, commercial, industrial and construction waste. Based largely upon World War II-era activities, the Department of Defense is a potentially responsible party (PRP) at the site, as are a number of municipalities, Fortune 500 companies, and small transporters in the Cincinnati area.
The U.S. Environmental Protection Agency (EPA) placed the Skinner Landfill site on the National Priorities List (NPL) in December 1982.
Site ResponsibilityThis site is being addressed through federal, state, and potentially responsible parties' actions.
Threats and ContaminantsLiquid sludge in the onsite lagoon was contaminated with heavy metals including cyanide, cadmium, and chromium, volatile organic compounds (VOCs) and semi-VOCs, pesticides, polychlorinated biphenyls (PCBs), dioxins, and furans. Groundwater is contaminated with various VOCs and semi-VOCs. Two creeks that border the site contained sediments contaminated with VOCs from sludge migration. Potential health threats included accidental ingestion of and direct contact with contaminated liquid sludge, groundwater, or river sediments. The potential existed for wildlife in the creeks to become contaminated from contaminated sludge.
EPA completed Phase I and II Remedial Investigations, which included the sampling of groundwater, surface water, and soils. Contaminants of concern detected include VOCs, semi-VOCs, pesticides, metals, PCBs, dioxins and furans. EPA completed the Feasibility Study in April 1992 and signed a Record of Decision (ROD) for an interim action Operable Unit (OU) on September 30, 1992. The actions required by the ROD included site fencing, connections to the Butler County public water system for potentially affected local users of groundwater, and groundwater monitoring. On December 9, 1992, EPA issued a Unilateral Administrative Order (UAO) for the performance of the actions required by the interim action ROD to the twenty then-identified PRPs. Several PRPs organized the Skinner Landfill PRP group, and this group fully complied with the requirements of the UAO. Several other PRPs refused to comply with the UAO.
EPA signed the ROD for the final OU at the site on June 4, 1993. The final ROD called for a multi-layered Resource Conservation and Recovery Act (RCRA) cap to be constructed over the area covered by the former dump and the buried waste lagoon. Any contaminated materials found outside the area to be capped, including contaminated soils found in buried waste pits onsite, were to be dug up and moved onto the area to be covered by the cap. Contaminated groundwater downgradient of the area to be capped was to be intercepted, captured, and discharged to the Publicly Owned Treatment Works.
On March 29, 1994, EPA entered into an Administrative Order on Consent with the Skinner Landfill PRP group for performance of the Remedial Design of the final remedy contained in the 1993 ROD. EPA approved the final design in June 1996. The cost for implementation of the approved final design was estimated at $9 million.
The Remedial Action (RA) at the site could not begin until an Alternative Dispute Resolution allocation procedure was completed. This allocation procedure was finalized in April 1999. EPA sent Special Notice Letters to the PRPs in February 1999 to initiate RA negotiations. The Consent Decree negotiated by the parties was signed in April 2000 and was entered in federal district court on April 2, 2001.
RA construction work began in April 2001. The Final RA consists of groundwater interception trenches, a slurry wall, a landfill cap, and long-term (30 years) Operation and Maintenance (O&M). EPA issued the Preliminary Close Out Report on September 27, 2001. The Final Inspection was completed in March 2003. The PRPs are conducting O&M activities at the site.
EPA completed the first and second five-year reviews for the site in March 1999 and March 2004, respectively. The 2004 five-year review indicated that the remedy as implemented was protective of human health and the environment. The PRPs replaced four piezometers at the site in December 2006.
A time-critical removal action was completed on the site in June 2008 to address some hazardous electronic waste that was disposed near the site fence.
EPA completed the third and fourth five-year reviews in March 2009 and March 2014, respectively, and found that the remedy remains protective of human health and the environment. The next five-year review is due by March 2019.
In 2012, EPA, in consultation with Ohio EPA, determined that an upgradient slurry wall is not required as part of the remedy. Therefore, EPA issued an Explanation of Significant Differences in September 2012 to document this change to the remedy.
ContactsRemedial Project Manager, U.S. EPA
scott hansen (firstname.lastname@example.org)
Community Involvement Coordinator, U.S. EPA