EPA ID: PAD980691703
Borough of Kimberton
Chester, PA 19442
Congressional District: 6th
Other Names: Henry Monsey, Ciba-Geigy
Last Updated: January 2015
- Fifth Five-year Review Report (PDF) (114 pp, 6.78 MB)
- 2014 Kimberton Five-Year Review Fact Sheet (PDF) (4 pp, 201 k)
- Final Stockton Evaluation Compilation Report (2010) (PDF) (57 pp, 2.55 MB)
QuestionsThe EPA is dedicated to providing you with timely and accurate information about our work at this site. If you have any questions or concerns, please contact:
Vance Evans 215-814-5526
On This Page
- A vapor intrusion study was conducted in 2011 at several businesses and residences. No current health concerns from volatile organic compounds (VOCs) potentially related to the Kimberton Site were identified as a result of the study. Due to potential future risks, BASF and Henry Co. proposed the installation of vapor intrusion mitigation systems on one residential property and one building located on Henry Co. property. The mitigation systems are very similar to radon mitigation systems and were installed in 2012.
- Construction work was completed at Kimberton in 1993, with the installation of a groundwater and surface water treatment system which removes mainly trichloroethene using an air stripper.
- Since the installation of the treatment system, groundwater and surface water have been continually monitored.
- A permanent waterline, installed in 1992, provides water to residences and businesses near the site.
- The fifth five-year review was completed in August 2014” and moved to the top bullet in this section. Two issues were identified as part of this review. The remedy for Operable Unit 1 was determined to be protective. The remedy for Operable Unit 2 was determined to be protective in the short-term. Long-term protectiveness will be achieved once the two issues identified in this review are addressed. Additional detail on these two issues is available in the August 2014 Report.
- The site is currently used by the Henry Company to manufacture roofing products. The company is responsible for maintaining the groundwater treatment system, collecting the monitoring data, and reporting that data to the EPA.
- The site occupies about 45 acres in a semi-rural area, surrounded by homes, light industry and open space. The downtown area of Kimberton is located less than a mile away.
- About 500 people live within a one-mile radius of the site.
- From 1947 through 1959, the site had been used to make resins textiles and asphalt products.
- Previous owners had disposed of various residues in eight on-site lagoons, which eventually leaked, contaminating the on-site soil, local groundwater and surface water.
- During routine well testing in 1981, contamination was detected and the lagoons were identified as the source of that contamination.
- In 1983, the EPA added the site to the National Priorities List of most hazardous waste sites in the country, making the site eligible for federal cleanup.
- The local Phoenixville Area School District purchased a property across the street from the Kimberton site with plans to build an elementary school. The school district and EPA consulted on environmental issues associated with the property. In June 2008 the school board voted not to proceed with the plan to build the school.
NPL Listing History
|Status: Final||Added: 1983|
- When the EPA became involved at the site in 1983, a series of early cleanup steps were taken, including removing hazardous waste drums, excavating contaminated soil from the lagoons, and treating the residential wells.
- In 1986, Ciba-Geigy and the Henry Company, under order from the State of Pennsylvania, provided 25 residential and commercial locations with an alternate drinking water supply.
- In 1992, a permanent waterline was installed to provide water to residences and businesses near the site.
- A long-term cleanup remedy was chosen for the site in 1989, which included pumping out the contaminated groundwater and surface water and treating them with an air stripper to remove the contaminants.
- The design and construction of the water treatment system was completed in 1993 and has been operating ever since.
- In the past 16 years, more than 4,000 pounds of volatile organic compounds have been removed from the water.
- The groundwater and surface water are monitored regularly and that information is reported to the EPA.
- A five-year review of the site completed in 2009 which determined that the cleanup remedy is working. Another five-year review is due in 2014.
- The groundwater and a tributary to nearby French Creek are contaminated with various volatile organic compounds, such as trichloroethene, dichloroethene, and vinyl chloride.
- Contaminant descriptions and associated risk factors are available at the Agency for Toxic Substances and Disease Registry website.
- To search an on-line database of all documents and reports on the Kimberton site, go to EPA’s Administrative Record Database.
- All documents and reports can also be reviewed in person at these locations:
East Pikeland Township Building
Phoenixville, PA 19460
U.S. EPA Region III
1650 Arch Street-6th Floor
Philadelphia, PA 19103
Call for an appointment.
- Some of the site’s key documents of interest are accessible below.
Preliminary Close Out Report (Summary of cleanup work) (PDF) (5 pp, 76.6 k)
More Five-Year Reviews
Final Stockton Evaluation Compilation Report (2010) (PDF) (57 pp, 2.55 MB)
Nineteenth Annual Ground Water Evaluation Report (PDF) (123 pp, 2.82 MB)
Eighteenth Annual Ground Water Evaluation Report (PDF) (136 pp, 5.72 MB)
Seventeenth Annual Ground Water Evaluation Report (PDF) (129 pp, 11.7 MB)
Sixteenth Annual Ground Water Evaluation Report (PDF) (128 pp, 4.55 MB)
Fifteenth Annual Ground Water Evaluation Report (PDF) (132 pp, 11.6 MB)
Final Vapor Intrusion Sampling Plan (PDF) (202 pp, 4.96 MB)
Vapor Intrusion Sampling Report (PDF) (140 pp, 5.36 MB)
Work Plan for the Mitigation of Vapor Intrusion (PDF) (22 pp, 1.91 MB)
- Submit a FOIA Request
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- Fact Sheets
March 2014 (PDF) (4 pp, 201 k)
November 2011 (PDF) (2 pp, 141 k)
December 2010 (PDF) (4 pp, 233 k)
December 2009 (PDF) (4 pp, 492 k)
August 2008 (PDF) (6 pp, 670 K)
- Community Involvement Plan (PDF) (44 pp, 594 K)
- The Henry Company currently uses the site to manufacture roofing products. The property consists of a main plant, warehouse, office buildings, and a treatment plant on a 24-acre property. An additional 21 acres that is open, unused land around the site was sold for potential redevelopment.
- Since 1947, the property has been used by several different companies for manufacturing resins, textiles, and now asphalt products.
- Throughout the cleanup of the Kimberton site, manufacturing has continued to occur on the property. The Henry Company operates and maintains the groundwater treatment system.
- Learn more about the Land Revitalization Action Team - a team of EPA professionals who provide "one-stop-shopping" to guide interested parties who are considering the redevelopment of Superfund sites.
- View the Consent Degree (PDF) (62 pp, 3.17 MB) tr- the legal agreement between EPA and the potentially responsible parties to clean up the site. This document, and other documents available in the Documents and Reports section of this page, are necessary, but not comprehensive, to assess this site's potential for reuse.
- Want more information about how to reuse a Superfund site?