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U.S. EPA REGION 5
MONTGOMERY COUNTY
DAYTON

Congressional District # 08

POWELL ROAD LANDFILL

EPA ID# OHD000382663
Last Updated: April, 2015

Site Description

The Powell Road Landfill site is a former gravel pit which was converted into a landfill in 1959, and operated until 1984, under various owners. The current owner is SCA Services of Ohio, a subsidiary of Waste Management of North America, Inc. Commercial, industrial, and non-hazardous domestic wastes were disposed. Industrial wastes disposed include ink waste, paint sludge, strontium chromate and benzidine. The landfill ceased operation in 1984, and was partially capped. The area of waste disposal covers approximately 36 of the total 70 acre site, rising 30 to 40 feet above the surrounding terrain. It is bordered to the north by residential housing, to the east by an intermittent stream, to the west by wooded areas and to the south by wooded areas and the Great Miami River. The nearest residents are about 200 feet north of the landfill on Powell Road. A residential area known as Eldorado Plat is immediately south of the Great Miami River to the south of the landfill. 980 people live nearby.

Site Responsibility

The site is being addressed through federal, state and responsible parties actions.

Threats and Contaminants

Landfill gases are contaminated with methane and volatile organic compounds (VOCs) such as vinyl chloride, tetrachloroethene, 1,1-dichloroethane, 1,2-dichloroethane, benzene, chlorobenzene, ethyl benzene, xylene and toluene. Landfill leachate contains all of the VOCs in landfill gas plus numerous others, semi-VOCs including phenol, dichlorobenzene, methyl phenol, nitrobenzene, dibenzofuran and inorganic compounds such as lead, chromium, mercury, cadmium and arsenic. Surface and near-surface soils contain semi-VOCs such as benzo(a)pyrene, crysene, benzo(b, k)fluoranthene, pesticides such as DDT and polychlorinated biphenyls (PCBs - Aroclor 1016, 1254). The shallow and primary aquifers adjacent to the landfill contain VOCs such as 1,1-dichloroethane, 1,2-dichloroethene, 1,1,1-trichloroethane, trichloroethene and vinyl chloride. A few area private wells have detected VOCs at low concentrations.

Cleanup Progress

On November 12, 1987, an Administrative Order on Consent (AOC) was entered between the United States Environmental Protection Agency (EPA), the Ohio Environmental Protection Agency, and SCA Services of Ohio, Incorporated (SCA). This AOC required SCA to conduct a Remedial Investigation/Feasibility Study (RI/FS). Based on the RI/FS, EPA issued a Record of Decision (ROD) on September 30, 1993, selecting cleanup actions including: institutional controls; an improved landfill cap; excavation and consolidation of contaminated soils under the landfill cap; ground water monitoring; storm water/flood controls; active landfill gas collection and treatment with a flare; shallow groundwater pump and treatment; leachate extraction and treatment.

Data from 1983 through 1995, indicated that groundwater quality improved or remained constant since 1988. For this reason, an Explanation of Significant Difference (ESD) was signed in January 1997, providing for delay of construction of the groundwater pump and treatment system until future groundwater trends are evaluated. A second ESD was signed in 1997, to allow for treatment of leachate offsite at a Publicly Owned Treatment Works (POTW), pending POTW approval. 

Remedial Action Consent Decree negotiations unsucessfully terminated in February 1998. A Unilateral Administrative Order (UAO) was issued to potenially responsible parties (PRPs) in May 1998. Under this UAO, the PRPs completed construction of the ROD remedy in January 2000.

Landfill gas/leachate collection/treatment and groundwater monitoring will be required for the long term (30+ years). Implementation of the groundwater treatment system will be contigent upon ground water monitoring results.

A Five Year Review was signed on August 5, 2003 and determined that the remedy was functioning as designed and the immediate threats had been addressed.  A groundwater study required by the EPA to evaluate whether the deferred groundwater extraction and treatment components of the remedy were necessary was completed in 2003.  The results of the study indicated that contaminant concentrations continue to decrease.  Therefore the groundwater extraction and treatment components of the remedy were not necessary. 

A second five Year Review was signed on July 30, 2008.  The review determined that the remedy protects human health and the environment because it eliminates the principal threat posed by the Site by preventing direct contact with contaminated materials, venting and destroying landfill gases, and extracting and treating leachate from the landfill.  A restrictive covenant in place needs to be evaluated for compliance with the Ohio Uniform Environmental Covenants Act (UECA).

The PRP submitted an IC workplan September 2008 and the final workpan was approved in December 2008.  The new environmental covenant was recorded in Montgomery County Ohio on September 29, 2010 and is in compliance with UECA.

On January 6, 2011 the Sitewide Ready-for-Anticipated Use (SWRAU) was signed. 

Waste Management of Ohio (the RP) continues to implement the remedy. 

On June 12, 2013, the third Five Year Review was signed.  The review determined that the remedy is protective of human health and the environment because it eliminates the principal threat posed by the Site by preventing direct contact with contaminated materials, venting and destroying landfill gases, and extracting and treating leachate from the landfill.  An environmental covenant is in place that restricts current and future land use.  The operation and maintenance plan has been updated to ensure long-term stewardship by establishing procedures for annual review and documenting that the institutional controls are in place, maintained and effective.

In December 2014, EPA responded to a request by Waste Management (the RP) to amend the ROD to eliminate the requirement for continued leachate collection in favor of monitored natural attenuation.  EPA determined that the implementation of a pilot test which allows for the temporary suspension of the leachate collection while continuing to monitor the wells for a period of at least 2 years is the next appropriate step.  Waste management submitted a work plan for the pilot test and it was approved by EPA in January 2015.

Success Story

No digital information is available for this section.

Community Involvement

No digital information is available for this section.

Congressional Interest

No digital information is available for this section.

Property Reuse

No digital information is available for this section.

Contacts

Remedial Project Manager, U.S. EPA
pamela molitor (molitor.pamela@epa.gov)
(312) 886-3543

Community Involvement Coordinator, U.S. EPA
susan pastor
(312) 353-1325

Aliases

POWELL ROAD LDFL
SCA SERV INC

 

Site Profile Information

This profile provides you with information on EPA's cleanup progress at this Superfund site.

 


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