Appendix M: Installation Narrative Summaries - denix

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The Air Force began restoration activities at F.E. Warren Air
Force Base (AFB) in FY84. Between 1984 and 1989,
trichloroethylene (TCE)-contaminated soil was removed from
Spill Sites (SSs) 1, 4, and 7, as well as the acid dry well site.
The base was placed on the NPL in February 1990 and a
federal facility agreement (FFA) was signed in 1991 that
included 19 sites, which were grouped into 7 operable units
(OUs); Modification 11 was signed in July 1998. Five additional
sites have been identified since 1991. All sites were
subsequently grouped into 14 OUs and five investigative zones.
In FY95, a Restoration Advisory Board (RAB) was formed. The
Air Force completed a basewide 5-year review in FY99 and
again in FY04.
To date, remedial investigations (RIs) have identified 24 sites
which were grouped into 14 OUs. The installation has signed
Records of Decision (RODs) for 19 of the sites, 11 of which
required no further action (NFA). The cleanup progress at F.E.
Warren AFB for FY02 through FY05 is detailed below.
In FY02, the engineering evaluation and cost analysis for SS 7
source area removal action was completed. The supplemental
design work at Zone C indicated that the selected remedy of
extraction and treatment was not feasible. The supplemental
preliminary assessment was completed. Meetings and training
for the RAB continued. Partnering meetings with the Air Force,
EPA, the State, contractors, and project managers continued
on a regular basis.
In FY03, the Air Force completed construction of the Zone B
final remedial action (RA) by installing a pump-and-treat
system. The revised feasibility study for Zone C was completed
and the ROD amendment continued on schedule.
In FY04, the Air Force completed and signed the landfills (LFs)
4 and 7, and Fire Protection Training Area 1 final RODs. The
RAs for LFs 4 and 7 were subsequently completed. The source
area removal action at SS 7 was completed. The second 5-year
review was completed. The Zone C ROD amendment was also
completed.
In FY05, F.E. Warren AFB completed and signed the Zone E
ROD indicating NFA required. The installation completed the
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Phase I Range RI with over 30,000 anomalies identified and
investigated. The Zone C ROD amendment was signed and the
remedy was implemented. The remedy selected for Zone C
included the use of hydraulic fracturing to place solid potassium
permanganate within the zone of groundwater contamination.
The installation also completed a supplemental preliminary
assessment/site inspection that added four sites to the
installation's cleanup program. The Air Force updated its
Military Munitions Response Program (MMRP) inventory. No
MMRP sites were identified at this installation during inventory
development. Meetings and training for the RAB continued.
Partnering meetings with the Air Force, EPA, the State,
contractors, and project managers continued regularly.
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F.E. Warren AFB completed and signed the ROD for Zone D
groundwater and an NFA ROD for the Zone D source areas.
The installation completed the remedial design and began
construction of the Zone D groundwater RA. The installation
began a Phase II site inspection (SI) for two of the newly
identified sites (SS 9 and SA 10), and began RI activities for the
other two sites (SS 8 and SS 10). The Air Force identified
munitions and explosives of concern (MEC) and MEC-scrap
along the base boundary, indicating a need to investigate the
adjacent private property. F.E. Warren AFB began the process
to obtain access to this property. The Air Force continued the
RI of the closed firing ranges. The cost of completing
environmental restoration has changed significantly due to
changes in estimating criteria.
The RAB held quarterly meetings, and also discussed proposed
plans for the installation's sites.
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The Air Force has identified no MMRP sites at this installation.
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Plan of action items for F.E. Warren Air Force Base are
grouped below according to program category.
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0 Complete installation of the Zone D
groundwater remedies in FY07.
0 Complete the RI for the closed north ranges
in FY07.
0 Continue monitoring for all sites requiring
RA-operation and long-term management,
including implementation of a Phase II
remedial process optimization for the Zone B
groundwater treatment system in FY07.
0 Complete the ongoing SI and RI efforts at the
four newly identified sites in FY07.
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There are no MMRP actions scheduled for FY07 or
FY08.
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