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. In order to address TCE contamination in subsurface soils at the Site, Olympia has installed and is now operating an in situ permanganate injection treatment system. See previous polreps for prior activities conducted by Olympia.
Olympia completed the initial 8 rounds of permanganate injection in December 2005. A total of 8,464 gallons of sodium permanganate solution has been injected to date. Monitoring data collected since that time indicates that the permanganate reagent has been effectively delivered throughout much of the treatment cell. However, several areas within the cell may need additional reagent. In addition, two areas outside and adjacent to the cell require additional assessment and possible treatment.
During the week of May 14-18, 2007, Olympia collected 5 discrete ground water sample profiles, advanced 14 soil borings, and installed 2 new peizometers in order to better assess areas which may require injection of additional reagent. Based on the information obtained from these borings and peizometers, Olympia installed 8 new injections wells within the treatment area.
On June 18, 2007, Olympia conducted a focused ground water sampling event to specifically evaluate the area between the southeast corner of the treatment cell and the sewer line right-of-way. Results of this sampling event are pending.
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