Field work for the installation of the air sparge/soil vapor
extraction system commenced at the site the week of May 20,
2002. Marin Environmental of Richmond, the environmental
contractor for the site, completed installation of five new
monitoring wells, decommissioned existing wells that were
no longer needed, and installed the air sparge and soil vapor
extraction points and underground piping in Area I of the
site (see Community Update #1, December 2001 for details on
the Corrective Action Plan and a site plan). Marin
also collected groundwater samples from site monitoring wells
to establish baseline groundwater quality conditions before
the air sparge/soil vapor extraction (AS/SVE) system is activated.
Preliminary results from these samples indicate that groundwater
quality is consistent with previous rounds. A small
amount of floating petroleum was observed in two
monitoring wells during sampling
activities. These wells will continue to be monitored
for the presence of petroleum during the course of the cleanup.
Upcoming Activities Schedule
Marin will complete the installation of the AS/SVE system
between now and the week of July 15. This will include
erection of a small remediation shed to house the required
mechanical and electrical equipment. Following startup
of the AS/SVE system, which is expected by July 15, excavation
of the French Drain in Area I and contaminated soils in Area
II will occur. Decommissioning of the on-site supply
well is currently scheduled to take place the week of July
Marin will be visiting the site regularly after the installation
of the remedial system to perform maintenance activities and
to collect performance monitoring samples.
Institutional Controls: A revised version of
the institutional control language (likely a deed restriction)
that will allow for mixed commercial/residential use of the
site is being developed for review and approval by the VTDEC.
Financial Assurances: Representatives of the
current owner and the state are still discussing the potential
options for a financial assurance mechanism that would provide
funds that could be used if the currently available fund is
exhausted and additional environmental problems are discovered
at the site. A proposal from a major insurance company
is expected shortly, which will need to be evaluated.
The parties remain optimistic that a solution that provides
financial protection at a reasonable cost can be obtained.