Appendix M: Installation Narrative Summaries - denix

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Longhorn Army Ammunition Plant (AAP) manufactured
pyrotechnic and illuminating signal munitions and
solid-propellant rocket motors. EPA placed the installation on
the NPL in August 1990. The Army and EPA signed an
interagency agreement (IAG) in October 1991. Identified sites
included storage areas, landfills, open burning grounds,
industrial areas, burial pits, sumps, and wastewater treatment
plants. Longhorn AAP became inactive and excess to the
Army's needs in July 1997. The Army awarded a technical
assistance for public participation contract to determine the
effects of on-post contamination on surface water entering
Caddo Lake in FY99. The Army completed a 5-year review in
FY02 for Sites 12, 16, 18, and 24. The installation updated the
community relations plan (CRP) in FY03. In FY04, the
installation formed a Restoration Advisory Board (RAB).
Environmental studies identified 50 sites at the plant, 18 of
which are eligible for the Installation Restoration Program (IRP).
The installation divided the sites into five groups. Two Records
of Decision (RODs) and two No Further Action (NFA) RODs
have been completed to date. The Army has transferred
approximately 6,800 acres to date. The cleanup progress at
Longhorn AAP for FY02 through FY05 is detailed below.
In FY02, the Army completed the 5-year review report for
interim actions at Sites 12, 16, 18, and 24. The installation
completed the perchlorate investigation and remedial
investigation (RI) reports, including risk assessments, for
Groups 2 and 4. It also completed the Site 16 feasibility study
(FS). The Army completed an inventory of closed, transferred,
and transferring ranges and sites with unexploded ordnance
(UXO), discarded military munitions, or munitions constituents.
The Army identified three Military Munitions Response Program
(MMRP) sites at this installation.
In FY03, the Army was the recipient of over $1 million of funded
grant work from the Environmental Security Technology
Certification Program and the National Institutes of Health for
field pilot studies designed to treat groundwater contaminated
with perchlorate. The Army completed a successful FS for in
situ treatment of perchlorate in soils. The installation completed
work plans for the background study and ecological risk
Army
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assessment (ERA). The Army held a public meeting, compiled
community surveys, and updated the CRP.
In FY04, the installation conducted a transition and partnering
meeting with regulators, the U.S. Fish and Wildlife Service
(FWS), and other Army personnel in anticipation of the change
in installation managers from Army Material Command to the
Army Headquarters BRAC Division, and a transfer meeting with
the FWS, the General Services Administration, and others to
facilitate property transfer. The installation prepared an
environmental condition of property (ECP) report and
participated in the development of an overarching transfer
memorandum of agreement between FWS and the Army. In 2
separate actions, the Army transferred a total of approximately
5,800 acres to FWS as part of the Caddo Lake National Wildlife
Refuge. The installation prepared a second ECP report to
support the FY05 transfer of a 125-acre tract of CERFA
Category 1 land to the FWS. The installation reviewed the
environmental site assessment/Environmental Baseline Survey
for the Production Area. The installation achieved response
complete (RC) at LHAAP 045 without an RI/FS. The installation
initiated site inspections for three MMRP sites and reviewed
historical record reports and site conceptual models for LHAAP
001 R (South Test Area), 002 R (Static Test Area), and 003 R
(Ground Signal Test Area). The installation held meetings with
regulators and other stakeholders to familiarize them with the
MMRP process and to generate input and approval. The
installation conducted a site tour for regulators and
stakeholders. The installation provided UXO, and munitions and
explosives of concern recognition training to regulators,
stakeholders, and interested public. The installation established
a RAB.
In FY05, the installation awarded a performance-based contract
(PBC) to address most of the remaining environmental
restoration work. The installation completed two FSs for LHAAP
12 and 67. The installation completed the sitewide ERA through
Step 3 and submitted the report to the regulators. The ERA is
now part of the PBC performance work statement. Additional
sampling and evaluation at LHAAP 32 recommended NFA. The
installation completed MMRP site inspections for three sites
and initiated an engineering evaluation and cost analysis
(EE/CA) for each of the sites. The RAB ratified its charter,
elected a co-chair, and held quarterly meetings.
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The installation completed the FS for LHAAP 37 and drafted the
proposed plans for LHAAP 8, 32, 37, 48, 53, and 67. Longhorn
AAP signed the ROD for LHAAP 12 and prepared the remedial
design with land use controls. The Army transferred 288 acres
to FWS.
Funding and contractual issues delayed RC at LHAAP 4, 49,
50, 55, 60, and 66. Regulatory issues delayed the RODs for
LHAAP 8, 32, 37, 48, 53, and 67 and the sitewide ERA.
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The installation completed the fieldwork for the three EE/CAs
for three MMRP sites. The Army anticipates that two of the
three sites will require further action. The installation found no
fused munitions at any of the sites.
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Plan of action items for Longhorn Army Ammunition Plant are
grouped below according to program category.
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0 Complete RODs for LHAAP 8, 32, 37, 48, 53,
and 67 in FY07.
0 Complete installationwide ERA in FY07.
0 Achieve RC and complete RODs for LHAAP 4, 49,
50, 55, 60, and 66 under the PBC in
FY07-FY08.
0 Complete 5-year reviews of the interim
remedies at Sites 16, 17, 18, and 24 and the
final remedy at Site 12 in FY07-FY08.
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0 Complete EE/CAs for three MMRP sites in FY07.
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