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Dublin TCE

Current Site Information

EPA Region 3 (Mid-Atlantic)

Pennsylvania
Bucks County
Dublin Borough

EPA ID# PAD981740004

8th Congressional District

Last Update: February 2014

Other Names


Dublin Water Supply

Current Site Status

The U.S. Environmental Protection Agency selected In-Situ Chemical Oxidation (ISCO) as the cleanup method for the contaminated groundwater in the Source Area of the Dublin TCE Superfund Site in a Record of Decision dated September 9, 2002. A pre-design investigation was conducted and construction of the full-scale ISCO remedy was constructed. Start up of the system occurred in May 2008. Two injections of the chemical oxidant have been completed and groundwater monitoring is being conducted to assess the success of the remedy. EPA has reviewed and submitted comments on a 3-year Performance Report for the system. EPA and the Responsible Party are working together to continue the cleanup.

EPA and the Responsible Party are also working together to investigate the vapor intrusion pathway. The Responsible Party has submitted an acceptable work plan and anticipate initiating the investigation in March 2014.

The first part of the Site cleanup began in late 1991 when EPA required the extension of the Dublin Borough public water supply system to affected and potentially affected residences and businesses, and required the construction of a new water supply well and treatment system. EPA completed construction of the water line and laterals for the homes in Dublin Borough in 1995. In 1996, EPA constructed an extension of the water line into neighboring Hilltown Township to provide public water to homes that could potentially be affected by contamination from the Site. Sequa Corp. completed construction of the water supply well and treatment system, and subsequently transferred ownership of the system to Dublin Borough. All homes and businesses along the water line route were connected to the public water supply system.

Site Description

The Dublin TCE site is located in Dublin Borough, Bucks County, Pennsylvania. In 1986, the Bucks County Health Department discovered trichloroethylene (TCE), a chemical component of solvents, in 23 home tap water samples in Dublin. The highest TCE concentrations were found in a well on the site property. This property has been the site of several manufacturing operations over the last 50 years, including Kollsman Motor Company which allegedly used and disposed of solvents, including TCE, on the property during its operation. This property is thought to be the likely source of the TCE groundwater contamination. The groundwater was used by private wells servicing approximately 100 homes, apartments, and businesses in Dublin. All the affected wells have been taken out of service and the drinking water is being provided by the public system.

Site Responsibility

Cleanup of this site is the responsibility of federal and state governments, and parties potentially responsible for the site contamination.

NPL Listing History

Our country's most serious, uncontrolled, or abandoned hazardous waste sites can be cleaned using federal money. To be eligible for federal cleanup money, a site must be put on the National Priorities List (NPL). This site was proposed to the NPL on October 26, 1989 and formally added to the list August 30, 1990.

Threats and Contaminants

Groundwater is contaminated with TCE. Potential health threats to people include drinking and inhaling of TCE from groundwater used for washing and direct contact with contaminated ground water.

Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.

Cleanup Progress

In 1987, EPA and John H. Thompson, the current owner of the site, entered into a consent order, and agreement that required Mr. Thompson to periodically sample business and residential wells in Dublin, and then provide an alternate safe water supply when wells are found to be affected by TCE contamination. Mr. Thompson installed carbon treatment systems on some contaminated wells and/or has provided bottled water for the residence or business owner. These filters prevented any immediate health threat from the site related contamination.

In late 1991, EPA required the extension of the Dublin Borough public water supply system to affected and potentially affected residences and businesses, and required the construction of a new water supply well and treatment system. EPA completed construction of the water line and laterals for the homes in Dublin Borough in 1995. This construction activity was completed early to coordinate with a planned Pennsylvania Department of Transportation highway project. In 1996, EPA constructed an extension of the water line into neighboring Hilltown Township to provide public water to homes that could potentially be affected by contamination from the site. Sequa Corp. completed construction of the water supply well and treatment system, and subsequently transferred ownership of the system to Dublin Borough. All homes and businesses along the water line route were connected to public water supply system.

In 1992, Sequa agreed to study the groundwater and soil contamination at the site and explore cleanup options in a feasibility study. The EPA accepted a modified version of the Remedial Investigation in December 1998. The baseline risk assessment was accepted by the EPA in July 1999. The feasibility study was submitted in October 1999 and accepted by EPA in March 2001. A proposed plan for the groundwater cleanup was issued in July 2001. The comment period for the Proposed Plan was extended to September 28, 2001. The Record of Decision with the final cleanup plan for the site was issued September 9, 2002. EPA, Sequa Corporation and John H. Thompson have successfully negotiated a Consent Decree to perform the Remedial Design and Remedial Action outlined in the ROD.

A Pre-Design Investigation was conducted in September 2006. This included the installation of three new groundwater monitoring wells. In addition to the new wells, two existing wells were drilled to deeper depths. The Pre-Design Investigation was conducted to provide information to assist in designing the in-situ chemical oxidation remedy. EPA approved the remedial design for the in-situ chemical oxidation cleanup remedy, which is the first phase of cleaning the contaminated source area of the site, in August 2007. The construction of the infrastructure for the in-situ chemical oxidation has been completed. Distribution of the chemical oxidant began in May 2008. The second injection of oxidant occurred during the spring and summer of 2009. EPA has reviewed and submitted comments on a 3-year Performance Report for the system. EPA and the Responsible Party will be working together to continue the cleanup.

EPA and the Responsible Party are also working together to investigate the vapor intrusion pathway. The Responsible Party has submitted an acceptable work plan and anticipate initiating the investigation in March 2014.

Contacts

Site Contacts

Administrative Record Locations

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