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 continuing 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) issued by EPA. See previous polreps for prior activities conducted by Olympia.
Olympia has completed the installation of additional monitoring wells, which will be used to measure the effectiveness of the in situ permanganate injection treatment. Olympia has surveyed the monitoring and injection well network and conducted a baseline sampling event in preparation for the first permanganate injection. The dirt access road has been graded to facilitate delivery of the permanganate, and additional site security fencing has been installed.
Planned removal activities include operation of the in situ treatment system and monitoring to ensure compliance with cleanup standards established in the Record of Decision (ROD).
The first injection of the permanganate reagent is scheduled to take place during the month of May.
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