The Site is located in the vicinity of Old Wilmington Road in West Caln Township, Chester County, Pennsylvania and consists of multiple investigation areas and multiple overlapping plumes of groundwater contamination.
The Site is currently on the Superfund National Priorities List (“NPL”) and in the Remedial Investigation (“RI”) stage. Several houses in the area had carbon filtration systems installed during a previous Removal Action due to high volatile organic compounds (“VOCs”) in their wells.
November 2017 validated results for two private wells came back with elevated metals (manganese and lead). EPA toxicologists concluded that based on the levels found, immediate intervention to interrupt the exposure pathway was recommended for the two wells. On April 24, 2018, after consulting with the EPA Remedial Project Manager and EPA toxicologists, and evaluating the factors contained in Section 300.415 of the NCP, the OSC determined that conditions at the Site posed a significant threat to public health, welfare or the environment and initiated response activities pursuant to Section 104 of CERCLA to mitigate the threat. A Special
Bulletin was issued to authorize the expenditure of CERCLA funding in an amount
not to exceed $7,500 to deliver bottled water to the affected properties.
On January 30,
2019, an Action Memo requesting additional funds, a change of scope and exemption
from the 12-month statutory limit for a Removal Action was issued. Additional
CERCLA funding in the amount of $25,000 was requested for the installation of
treatment systems at the affected properties, confirmatory sampling, and
additional bottled water delivery. This funding established an estimated
Removal Project Ceiling of $39,000. The objective of the
proposed Removal Action was to interrupt the manganese exposure pathway
(ingestion) at levels that pose a potential threat to human health.
On December 12,
2022, an Action Memo requesting a change in the scope of work set forth in the
previous Action Memorandum was issued. This would expand the scope of the
Removal Action to install a point of entry treatment system (“POETS”) on a
residential well where perfluorooctane sulfonic acid ("PFOS") has
been found at concentrations exceeding the applicable Removal Management Level
("RML"). No additional funding was requested.
For more information, please see the Documents Section.
