During a groundwater investigation pertaining to a separate Superfund site in the area (the PCE/TCE Northeast Contamination site, formerly known as the York Northeast Groundwater site), a distinct groundwater contaminant plume in York was discovered by the U.S. Environmental Protection Agency. The discovery of the new, distinct directed the EPA to complete an Abbreviated Preliminary Assessment (APA) for the Site in November 2010.
Sampling conducted during the preparation of the APA identified eight residential drinking wells with concentrations of PCE ranging from 9.6 to 32 micrograms per liter (mg/L). Of these wells, one also contained trichloroethene (TCE) at a concentration of 5.9 mg/L. The EPA’s maximum contaminant level (MCL) for both PCE and TCE is 5 micrograms/liter. Residential locations with contaminated drinking water wells were either hooked-up to public drinking water supplies or provided with whole-house filters to eliminate exposures. The EPA continued to hook-up residences (and in one instance a business) to public water supplies (or provided whole-house filters) to property owners/renters through 2017.
This Removal Action has remained Open since its initiation in the event additional homes or businesses were identified (based on changing plume dynamics) that required public water supply hook-ups or whole-house filters. The site is a National Priorities List (NPL) site and the Remedial Action (RA) to treat contaminated soil has been underway since March of 2023. In situ thermal remediation is treating contaminated soil from two former dry cleaners. The elimination of this soil contamination will prevent further leaching of the dry cleaning solvents in to the groundwater.
This Removal Action is scheduled to be completed by 9/30/2025.
