The Wells G & H Superfund Site covers approximately 330 acres in Woburn, Middlesex County, Massachusetts. The Site includes the aquifer and land 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.
At a former drum disposal area at the Site, PCB-contaminated surface soils posed a direct contact threat and TCE-contaminated subsurface soils are acting as a source of ground water contamination. See previous polreps for additional background information.
The Olympia Nominee Trust (Olympia) has been identified as a potentially responsible party (PRP) as the owner of the site. Olympia is performing the removal action under an Administrative Order on Consent (AOC). Removal activities completed by Olympia during previous reporting periods include excavation and off-site disposal of the PCB-contaminated surface soils, sampling activities to further characterize the Site, and development of a work plan for cleaning up the TCE-contaminated subsurface soils.
During this reporting period, Olympia has begun field activities to implement its work plan for the TCE cleanup. Olympia has cleared vegetation from the project area, coordinated with the Massachusetts Water Resources Authority to secure heavy equipment access over a sewer easement, and conducted a site walk with sheet piling subcontractors.
Planned removal activities include:
1) Improvements to the access road;
2) driving of sheet piling around the treatment area;
3) drilling of additional monitoring wells;
4) installation of injection wells, trenches, and a permanganate delivery system;
5) operation of the in situ treatment system; and
6) monitoring to ensure compliance with cleanup standards established in the Record of Decision (ROD).
Olympia will make necessary improvements to the Site access road and mobilize its sheet piling subcontractor to install the sheet piling containment wall around the containment area.
None identified at this time.
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