Appendix M: Installation Narrative Summaries - denix

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In 2005, the BRAC Commission recommended closure of Naval
Weapons Station (NWS) Seal Beach, Detachment Concord.
NWS Seal Beach, Detachment Concord, ships, receives,
inspects, and classifies munitions. It also serves as a munitions
storage and weapons maintenance, inspection, and testing
facility. Past operations, such as disposal of paints and
solvents, spent ordnance, treated wood, and household and
industrial waste; open burning of munitions; and spills or leaks
from fuel storage tanks contributed to contamination. These
sites interconnect to Suisun Bay and include sensitive habitat
for threatened and endangered species. EPA placed the
installation on the NPL in December 1994, primarily because of
surface water and sediment contamination at tidal and
litigation-area sites. In FY90, the installation formed a technical
review committee, which converted to a Restoration Advisory
Board (RAB) in FY95. The Navy and EPA signed a federal
facility agreement (FFA) in June 2001. The RAB received a
technical assistance for public participation (TAPP) award in
FY03. In FY03, the installation updated the community relations
plan (CRP) and finalized the 5-year review for the seven
litigation-area sites.
NWS Seal Beach has identified 57 sites to date. The Navy has
completed 15 Records of Decision (RODs) and recommended
20 sites for no further action (NFA). As a result of BRAC 2005,
the Tidal Area will be realigned to the Army and the Inland Area
is scheduled to close. The cleanup progress at NWS Seal
Beach, Detachment Concord, for FY02 through FY05 is
detailed below.
In FY02, the installation updated the site management plan
(SMP), completed the Area of Concern (AOC) 1 (Site 31)
removal action design, and initiated the removal action. The
Navy completed an inventory of Military Munitions Response
Program (MMRP) sites. Eight MMRP sites were initially
identified at this installation.
In FY03, the installation finalized the 5-year periodic review
assessment report for the seven litigation area sites and
concluded that the remedy was not protective in certain areas.
Three sites within the litigation area were recommended for a
supplemental feasibility study (FS). A revised draft final
remedial investigation (RI) report was issued for the three tidal
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area sites, but comments received were not in agreement with
the NFA and required additional characterization. The AOC 1
time-critical removal action (TCRA) was completed, and the
final TCRA summary report issued. EPA approved the draft
final annual amendment to the SMP. Additionally, eight MMRP
sites were identified for preliminary assessments (PAs) at NWS
Seal Beach, Detachment Concord. The CRP was updated and
finalized, with significant input from the RAB and regulators.
The RAB received an award under the Navy's TAPP program
and began work. RAB meetings included training on various
technical topics.
In FY04, the Navy, EPA, and the State signed the Site 1 ROD
after dispute resolution and initiated a groundwater sampling
plan. The Navy initiated the sampling plan for investigating
groundwater at Site 1, and the remedial design (RD). RAB
membership increased to nine and monthly meetings
continued.
In FY05, the Navy completed the Site 1 landfill cap RD and
initiated remedial action. The Navy completed a treatability
study in the litigation areas. The Navy performed data gap
sampling at Sites 2, 9, and 11, and found that additional work
was required. The Navy completed an engineering evaluation
and cost analysis and a non-TCRA (NTCRA) memo for Site 30.
Also, the Navy initiated the MMRP PA and issued a draft report
for review.
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NWS Seal Beach, Detachment Concord, transitioned
management of Sites 13, 17, 22, 27, 29, and Solid Waste
Management Units (SWMUs) 2, 5, 7, and 18 under BRAC
2005. The Navy signed an NFA ROD for Site 17 after soil,
sediment, and groundwater sampling was completed. The
installation began the Site 30 NTCRA work plan. The
installation also finalized the additional data gap sampling work
plan for Site 11 following informal dispute resolution. The Navy
began RI sampling at Site 31. The installation began resolution
of a litigation area supplemental FS informal dispute. The Navy
began to transition environmental cleanup of the Tidal Area
sites to the Army. The installation submitted a draft RI report for
Site 22 and a draft pilot test work plan for SWMUs 2, 5, 7, and
18.
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The Navy began the Site 1 low permeability landfill cap
construction in the Tidal Area; however, munitions findings
delayed completion.
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The installation and RAB members reviewed site
characterization documents during regular monthly meetings,
and coordinated the transition of cleanup under BRAC 2005.
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The Navy completed the draft final MMRP PA. The installation
awarded the contract to begin site inspection (SI) work plan
preparations.
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Plan of action items for Naval Weapons Station Seal Beach,
Detachment Concord are grouped below according to program
category.
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0 Complete Site 30 NTCRA work plan in FY07.
0 Resolve informal dispute, finalize litigation
area FS, and prepare proposed plan and ROD in
FY07.
0 Complete Site 1 landfill cap construction and
install groundwater monitoring wells in FY07.
0 Complete remaining Site 11 data gap sampling
and RI report for Sites 2, 9, and 11 in FY07.
0 Transition Tidal Area environmental cleanup
program to Army in FY08.
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0 Complete SI work plan in FY07.
M-146