Appendix M: Installation Narrative Summaries - denix

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Letterkenny Army Depot (AD) contains various contaminated
sites resulting from its ammunition and vehicle maintenance
missions. Sites include disposal lagoons and trenches, oil burn
pits, an open burning and open detonation area, an explosives
washout plant, two scrap yards, landfills, industrial wastewater
treatment plant lagoons, and industrial wastewater sewer lines.
EPA has placed two areas of Letterkenny on the NPL: the
Southeastern (SE) Area in July 1987 and the Property Disposal
Office (PDO) in March 1989. Both sites are in the southern part
of the installation. The Army and EPA signed an interagency
agreement (IAG) in February 1989. The installation has
concentrated its remedial efforts on source removal methods,
including excavation, low-temperature thermal treatment, and
backfilling and capping of soil in the industrial wastewater
treatment plant lagoons and the three K-Areas; emergency
repairs to leaking industrial wastewater sewers; removal of the
PDO fire training pit; and emergency removal of playground soil
at the PDO area and of sediment contaminated with
polychlorinated biphenyls (PCBs) in the Rocky Spring
springhouse. In FY96, the Army established a BRAC cleanup
team, the community formed a local redevelopment authority,
and the installation established a Restoration Advisory Board
(RAB). The Army completed a 5-year review for the SE area in
FY02.
To date, the Army has signed eight Records of Decision
(RODs) and transferred approximately 761 acres. The cleanup
progress at Letterkenny AD for FY02 through FY05 is detailed
below.
In FY02, the installation completed a Phase II limited depth
transfer, and decontaminated Buildings 651 and 652. The Army
completed the SE area 5-year review. The installation
completed the soil removal action for PDO Operable Unit (OU)
5 and the Defense Reutilization and Marketing Office scrap
yard PCBs. The installation initiated the focused feasibility
study (FFS), proposed plan, and ROD for SE OU 11 and SE
OU volatile organic chemical (VOC)-contaminated groundwater.
The Army completed an inventory of closed, transferred, and
transferring ranges and sites with unexploded ordnance,
discarded military munitions, or munitions constituents. No
Military Munitions Response Program (MMRP) sites were
identified at this installation.
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In FY03, the installation signed a finding of suitability to lease.
Groundwater sampling results of Phase III parcels
demonstrated that the Phase III parcels were clean. The Phase
III finding of suitability to transfer (FOST) was signed. The
installation conducted a tour of the installation sites for the
RAB. Letterkenny AD was announced as the 2002 winner of
the Secretary of the Army's Environmental Award for
Environmental Restoration.
In FY04, the Army transferred the Phase III BRAC property.
The installation initiated the removal of lead contaminated soil
at Old PDO Scrapyard. The installation continued groundwater
sampling for PDO OU 2.
In FY05, the Army signed a ROD for SE OU 4. The installation
submitted RODs for Phase IV and SE OU 10 for regulatory
review.
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Letterkenny AD installed and sampled additional deep wells in
SE OUs 3, 6, and 11 to address groundwater plume delineation
issues. The Army and EPA signed a ROD and FOST for the
Phase IV Parcels. The Army and EPA also signed RODs for the
SE OU 10 groundwater and SE OU 2 Industrial Wastewater
Sewers and Associated Contaminated Soils. Work began in the
Ammo Area on the TNT Washout Plant and SE OU 12 Landfill
5 (Area G). The installation continued to address landfill issues
at SE OU 9 Landfill (LF) 2 (Area J).
Technical issues delayed the FFS and remedial design (RD)
phase for the on- and off-post contaminated groundwater (SE
OUs 3, 6, and 11). Mission changes and force protection issues
delayed the property transfer of the Phase IV parcels.
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The Army has identified no MMRP sites at this installation.
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Plan of action items for Letterkenny Army Depot are grouped
below according to program category.
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0 Complete the FFS and RD phase for the on- and
off-post VOC-contaminated groundwater (SE OUs
3A, 6, and 11) in FY07-FY08.
0 Continue to cleanup the Ammo Area on the TNT
Washout Plant and SE OU 12 LF 5 (Area G) in
FY07-FY08.
0 Continue to address landfill issues at SE OU
9 LF 2 (Area J) in FY07-FY08.
0 Complete the Phase IV parcels property
transfer in FY07-FY08.
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There are no MMRP actions scheduled for FY07 or
FY08.
M-112