Malvern

A site in East Whiteland Township, Chester County, Pennsylvania operated as a solvent reclamation facility from 1952 to 1992. A wooded area surrounded by residential and undeveloped areas bordering the property, the project site consists of a main plant area (MPA) connected to a former disposal area (FDA) by a narrow meadow corridor. Chemclene used a distillation process to remove impurities from the previously used solvents; prior to 1976, sludge from the distillation process was disposed in the FDA. The former processing, chemical storage, and waste management practices at the property have led to solvent contamination in the soil and groundwater. Site remedies included an Accelerated In-Situ Bioremediation (AISB) system in the MPA, and soil vapor extraction (SVE) at the FDA. In its Five-Year Review, the United States Environmental Protection Agency (USEPA) questioned the long-term effectiveness of the SVE system and requested additional investigaton to support revisions to the Conceptual Site Model (CSM) in the FDA.