The Wells G & H Superfund Site covers approximately 330 acres in Woburn, Middlesex County, Massachusetts. The Site includes the aquifer and land mass area located within the zone of contribution to the City of Woburn's two municipal drinking water wells known as Wells G & H. The Olympia Property is one of the five primary source areas of contamination within the Federal Superfund Site. The other four source areas are the W.R Grace Co. property, the UniFirst Corporation property, the New England Plastics property, and the Wildwood Conservation Corporation property. The 21-acre Olympia Property is located within the boundaries of the Superfund Site at 60 Olympia Avenue. The Aberjona River flows north to south through the Olympia Property and splits the property. The property on the east side of the river is occupied by a one-story commercial building used as a trucking terminal. The portion of the property to the west of the river consists of undeveloped woodland and wetland areas. It is in this western portion of the property that was the location of a former drum disposal area.
TCE-contaminated soils (up to 110 mg/kg) are present in the subsurface at approximately eight to twenty feet below grade in the former drum disposal area. These soils have contaminated ground water and continue to act as an ongoing source of ground water contamination. The associated ground water plume has contributed to the contamination of the aquifer that serves Wells G & H. In addition, PCBs (Aroclor 1260 up to 33 mg/kg) were present in exposed surface soils in the former drum disposal area.
Pursuant to an Administrative Order on Consent, the removal is proceeding as a PRP-lead action. The PRP has completed the excavation and off-site disposal of the PCB-contaminated surface soils. The PRP has also developed a work plan and begun to implement a cleanup of the TCE contamination.