Appendix M: Installation Narrative Summaries - denix

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Fort Lewis is located approximately 15 miles south of Tacoma,
Washington. Its mission includes planning and executing
Pacific, NATO, and other contingency missions; providing troop
training; operating an airfield and medical center; and providing
logistical support. EPA placed two Fort Lewis sites on the NPL
after investigations revealed soil and groundwater
contamination; Landfill (LF) 5 in July 1987, and the Logistics
Center in November 1989. EPA removed LF 5 from the NPL in
May 1995. The Army and EPA signed an interagency
agreement (IAG) in January 1990. In 2005, the BRAC
Commission recommended Fort Lewis for realignment.
Additional sites identified at Fort Lewis include landfills, former
ranges, and spill sites. Primary contaminants include organic
solvents, heavy metals, and fuels. The Army completed a
5-year review for the Logistics Center in FY97 and one for for
the Logistics Center, LFs 2 and 4, and the Illicit Polychlorinated
Biphenyl (PCB) Dump Site in FY02. Fort Lewis has developed
a community relations program; there has been no public
interest in developing a Restoration Advisory Board (RAB).
The Army and EPA have signed three Records of Decision to
date. The cleanup progress at Fort Lewis for FY02 through
FY05 is detailed below.
In FY02, the installation completed a 5-year review for LFs 2
and 4, and the Illicit PCB Dump Site. It also completed a Phase
II remedial investigation (RI)at LF 2 and thermal specifications
for trichloroethylene (TCE) source removal in the vadose zone.
The Army completed the installation of six lower aquifer wells to
assist in monitoring the lower aquifer TCE plume.
In FY03, the installation continued to operate two pump and
treat systems for containment and treatment of the upper
aquifer TCE plume. Planning for thermal remediation systems
for Area 1 was completed. Construction of infrastructure for the
remediation of LF 2 vadose zone and unconfined aquifer TCE
dense non-aqueous phase liquid began. The monitoring of LF 4
contaminants (TCE) continued. The Army completed
bioremediation feasibility studies (FSs) for TCE and began
further studies involving enhanced mass transfer, assessment
of flux, and numerical modeling to support a monitored natural
attenuation decision. The installation continued work on the
lower aquifer study. The Army initiated the closed, transferred,
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and transferring (CTT) range and site inventory for Fort Lewis
and Vancouver Barracks under the Military Munitions Response
Program (MMRP). The installation hosted quarterly work group
meetings with scientists and regulators to assist the
remediation of the Logistics Center. It also held an open
house, distributed a newsletter about the status of site
remediation activities, and solicited RAB interest.
In FY04, the installation continued operations and maintenance
(O&M) of remedies at the Logistics Center and the Illicit PCB
Dump Site. The installation completed the delineation of extent
of TCE plume in Logistics Center Sea Level Aquifer (lower
aquifer) and the associated study. The installation completed
the field sampling portions of a vapor intrusion study for the
Madigan Housing Area. The installation completed interim
remedial actions (IRAs) for the Former Miller Hill Ranges. The
installation submitted draft decision documents (DDs) with
proposed final remedies for three Installation Restoration
Program (IRP) sites. The Army completed the confirmatory
sediment investigation at Park Marsh LF. The installation
completed in situ thermal treatment of Area 1 in order to reduce
life-cycle pump and treat costs, and continued research
involving enhanced mass transfer and assessment of flux. The
Army completed the Phase III CTT inventory. The installation
completed an IRA for the Former Skeet Range.
In FY05, the installation continued O&M of remedies at the
Logistics Center (two groundwater pump-and-treatment
systems) and the Illicit PCB Dump Site (cap and fence).
Long-term management remedies at the Logistics Center, LFs
1 and 4 continued. The installation completed in-situ thermal
treatment (an innovative technology) at the second of three
Logistics Center source areas. The installation began
significant modification of one Logistics Center pump-and-treat
system by installing eight new extraction wells. Additionally, the
installation closed the potential vapor intrusion pathway for the
Logistics Center. A completed Sea Level Aquifer focused FS
was expanded into a full FS. Additional monitoring wells were
installed and sampled to further delineate the TCE plume in the
Sea Level Aquifer. The installation submitted draft DDs with
proposed final remedies for four IRP sites, including a no
further action remedy (NFA) for the Park Marsh LF site. The
installation conducted site investigation (SI) sampling at one of
the two remaining sites without a selected or proposed remedy
(LF 6). The installation completed IRAs at the former Evergreen
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Infiltration Range (soil removal) and former Skeet Range
(perimeter fence). The Army initiated an SI for seven MMRP
sites. The installation continued the community relations
program. Fort Lewis received the DoD Secretary of Defense
Environmental Award for Restoration.
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Fort Lewis continued O&M of remedies at the Logistics Center,
Illicit PCB Dump Site, and LFs 1 and 4. The installation initiated
in-situ thermal treatment at the last of three Logistics Center
source areas and completed modification of one Logistics
Center pump-and-treat system. Fort Lewis also completed the
Logistics Center Sea Level Aquifer FS and prepared a draft DD.
The Army selected final remedies in final DDs for five non-NPL
sites. Fort Lewis proposed a NFA remedy in a draft DD for LF
6, one of the two remaining non-NPL sites without a remedy.
Technical issues delayed the in-situ thermal treatment project.
The installation continued the community relations program.
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Fort Lewis completed an SI work plan for all MMRP sites.
Technical issues delayed the SI report.
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Plan of action items for Fort Lewis are grouped below according
to program category.
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0 Complete in-situ thermal treatment at the
final Logistics Center source area in FY07.
0 Complete Logistics Center Sea Level Aquifer
remedy selection in FY07.
0 Begin investigation of the last remaining
non-NPL site in FY07.
0 Complete Fort Lewis Agreed Order RI report in
FY07-FY08.
0 Continue O&M of remedies in FY07-FY08.
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0 Complete field sampling and SI in FY07.
M-74