Appendix M: Installation Narrative Summaries - denix

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Naval Air Station (NAS) Brunswick supports activities for
submarine warfare. Site types include landfills, a groundwater
plume contaminated with volatile organic compounds (VOCs),
and two underground storage tank (UST) sites. Activities that
contributed to contamination include intermediate aircraft
maintenance, material support for maintenance, aircraft fueling
services, storage and disposal of ordnance, and all-weather air
station operations. Onsite landfills were used to dispose of
wastewater treatment sludge, paints, solvents, medical
supplies, pesticides, petroleum products, and photographic and
industrial chemicals. EPA placed the installation on the NPL in
July 1987, because some sites were used to store or dispose of
hazardous waste. The installation signed a federal facility
agreement (FFA) in 1989, which was revised in 1990 to include
the State of Maine. The installation established an
administrative record and information repository in FY87.
During FY88, the community relations plan was completed. A
technical review committee was formed in FY88 and converted
to a Restoration Advisory Board (RAB) in FY95. The installation
conducted 5-year reviews in FY01 and FY05.
Studies conducted at the installation have identified 21 sites.
The installation completed a Record of Decision (ROD) to
address the eastern groundwater plume, three USTs, and a
waste pit. In addition, the installation has signed a ROD for
Sites 4, 7, 9, 11, and 13 and a ROD for the eastern
groundwater plume treatment plant. The installation has
completed no further action documentation for Sites 14, 15, 16,
and 18. The cleanup progress at NAS Brunswick for FY02
through FY05 is detailed below.
In FY02, the installation worked with regulators to develop and
implement an exit strategy for Building 95. The Navy and the
regulators agreed that a consensus statement would be used to
document the exit strategy. The installation evaluated initial
diffusion sampling results; the results were similar to traditional
techniques. The Navy completed an inventory of all Military
Munitions Response Program (MMRP) sites. One MMRP site
was identified at this installation.
In FY03, the Navy monitored sampling results for Building 95,
eliminating maleic hydrazide from the long-term management
plan (LTMP). The installation continued to develop an exit
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strategy for Building 95. The Navy conducted an additional
investigation at Site 12 for possible perchlorate contamination
and prepared a sampling plan for this effort. Diffusion sampling
was accepted as an alternative to low flow sampling, resulting
in cost and time savings. The installation initiated the LTMP for
Site 7.
In FY04, the Navy continued to monitor sampling results for
Building 95 as the exit strategy. The installation completed the
LTMP and initiated sampling for Site 7. The Navy also initiated
monitored natural attenuation for Sites 1 and 3 and the eastern
plume. The Navy began optimization of the eastern plume
remedy and contracted to install two new extraction wells to
improve system effectiveness. In addition, the Navy planned to
expand its investigation of Site 2. The Navy prepared and
distributed the draft 5-year review.
In FY05, NAS Brunswick completed a 5-year review and
continued to monitor sampling results at all sites. The
installation demolished barracks at Site 9 and prepared an
engineering evaluation and cost analysis to address underlying
contaminated soil. The Navy found that extraction wells in the
eastern plume were not necessary. NAS Brunswick completed
a draft preliminary assessment (PA) to address regulatory
issues.
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The Navy began the contaminant removal at Site 9. The
installation contracted work to install two extraction wells to
supplement the ongoing groundwater treatment of the eastern
plume, to investigate the area north of Sites 2 and 17 (Building
95), and to initiate fieldwork at the former explosive ordnance
disposal site (Site 12). NAS Brunswick also began to develop
and implement a work plan to delineate the areal extent of 1,4
dioxane, with planned modifications to the groundwater
extractions and treatment system if necessary. The cost of
completing environmental restoration has changed significantly
due to changes in estimating criteria.
Regulatory review delayed development of institutional control
(IC) boundaries for Installation Restoration Program (IRP) sites.
The installation conducted technical subcommittee (TSC)/RAB
meetings and conference calls.
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NAS Brunswick completed the PA for existing sites. The
installation identified additional areas of concern, requiring
PA/site inspection (SI).
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Plan of action items for Naval Air Station Brunswick are
grouped below according to program category.
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0 Complete revised base instructions and
develop IC boundaries for IRP sites in FY07.
0 Install two extraction wells in FY07.
0 Develop and execute a closeout plan for Site
12 in FY07.
0 Begin fieldwork at Mere Brook in FY07.
0 Complete field investigations north of Sites
2 and 17 (Building 95) in FY07.
0 Conduct TSC/RAB meetings and conference calls
in FY07.
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0 Finalize PA/SIs in FY07.
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M-137