Current Site Information
EPA Region 3 (Mid-Atlantic)Pennsylvania
King of Prussia
EPA ID# PAD014269971
7th Congressional District
Last Update: January 2015
Kessler Stanley & Co. Inc.
Current Site Status
The U.S. Environmental Protection Agency is overseeing the cleanup of the Stanley Kessler Co. site where construction of a groundwater treatment system was completed in October 1998. Groundwater extraction and treatment will continue until the onsite groundwater reaches safe levels. Kessler conducts semi-annual groundwater sampling to monitor the effectiveness of the groundwater treatment system.
EPA’s first five-year review for the site, completed in 2004, determined that the remedy was functioning as designed and was protective of human health and the environment in the short term. During a second five-year review, completed in 2009, EPA found that the remedy was functioning as designed, but deferred making a protectiveness determination until a vapor intrusion assessment could be completed. EPA’s third five year review was completed in August 2014 and concluded that the remedy is currently protective of human health and the environment in the short term, but recommended further evaluation of vapor intrusion and 1,4-dioxane, as well as the performance of a capture zone analysis. EPA expects the site will be fully protective once these recommendations are addressed and groundwater cleanup goals are achieved.
Site DescriptionThe Stanley Kessler Company, Inc. site is located in Montgomery County, Pennsylvania. The company is engaged in degreasing and repackaging of welding wire. Past operational practices resulted in spillage of solvent degreasers into floor drains that fed into an underground septic tank and into a cesspool with no structural bottom. In 1979, organic compounds found in solvents and degreasers, such as 1,2,3-trichloropropane, trichloroethylene (TCE) and tetrachloroethane were detected in the Upper Merion Reservoir about ½ mile north from the site. The reservoir is a major source of drinking water for the Philadelphia Suburban Water Company, which serves an estimated 800,000 people. Groundwater on-site is contaminated with volatile organic compounds (VOCs) including TCE and 1,1,1 trichloroethane (TCA) from the former waste disposal practices. Approximately 5,000 people live within a mile of the site. The area surrounding the site is industrial, with private residences situated beyond the neighboring industrial facilities. The site threatens a current source of drinking water.
Site ResponsibilityThis site was the responsibility of federal and state governments, the site owner and parties potentially responsible for site contamination.
NPL Listing HistoryOur 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. This site was proposed to the list on December 30, 1982 and formally added to the list on September 8, 1983.
Threats and ContaminantsGroundwater on site is contaminated with volatile organic compounds (VOCs) including TCE and 1,1,1 trichloroethane (TCA) from the former waste disposal practices. VOCs have been detected in the drinking water reservoir. People may be at risk by drinking contaminated ground water.
Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.