Appendix M: Installation Narrative Summaries - denix

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The Dahlgren Naval Surface Warfare Center changed its name
in FY05 to the Naval Support Facility, Dahlgren (Dahlgren) to
reflect integration into the Naval District Washington Region.
Dahlgren conducts ordnance testing for the Navy. Site types
include former landfills, former ordnance burning and disposal
areas, underground storage tanks, operating ordnance ranges,
and operating ordnance research and development areas. The
installation established an information repository and an
administrative record in FY91. EPA placed the installation on
the NPL in October 1992 because of potential migration of
releases from three contaminated sites. These releases could
affect the Potomac River, Gambo Creek, associated wetlands,
and local groundwater aquifers used for drinking water.
Ordnance testing operations contributed to the contamination.
A federal facility agreement (FFA) was signed in September
1994. In 2005, the BRAC Commission recommended Dahlgren
for realignment. In FY92, a community relations plan was
completed, and the installation formed a technical review
committee (TRC). In FY95, the TRC was converted to a
Restoration Advisory Board (RAB). The installation completed
5-year reviews in FY03, FY04, and FY05.
To date, Dahlgren has identified 68 sites. Records of Decision
(RODs) have been completed for 20 sites since the beginning
of the environmental restoration process. The cleanup progress
at Dahlgren for FY02 through FY05 is detailed below.
In FY02, the installation completed a remedial investigation and
feasibility study (RI/FS), a proposed plan (PP), and a ROD for
Site 6, and completed an RI for Site 55. Four Appendix B
closeout sites were sampled and documents were finalized for
no further action (NFA) remedial designs (RDs) for Sites 6 and
46. Long-term management work plans were finalized for Sites
9, 10, and 17. The installation completed interim remedial
actions (IRAs) at Sites 13 and 50. The Navy completed an
inventory of all Military Munitions Response Program (MMRP)
sites. No MMRP sites were identified at this installation.
In FY03, the installation completed two RI/FSs, two PPs, and
two RODs for Sites 31 and 55. The Navy completed the 5-year
review for Site 2. The installation completed the Site 46 RA and
began the Site 6 RA. The installation also initiated the Site 37
RD. The Navy initiated a treatability study (TS) using the in-situ
Navy
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Multiple Application Gas Nutrient System (Magnus System) to
inject nutrients into the groundwater at Site 12. The additional
planned RD was not required.
In FY04, the installation completed three RIs (Sites 32, 37, and
61), two FSs (Sites 32 and 37), two PPs, and two RODs for
Sites 32 and 37. The Navy completed the 5-year review for
Sites 9, 10, 12, and 17. The installation completed the Site 6
RA and began construction on Site 47 IRA. The Site 37 100
percent RD was submitted. The Magnus System TS continued
at Site 12. The installation completed annual wetland
monitoring reports for Sites 9/58, 17, 25, 46, and 50. The
installation completed IRAs for Sites 43 and 52. The installation
initiated the IRA for Site 61 and completed site screenings for
four sites (Sites 14, 15, 38, and 57).
In FY05, the Navy completed a comprehensive 5-year review
for annual wetland monitoring sites, an RD for Site 37, and an
annual wetland monitoring report for Sites 6, 9, 17, 25, 46, 50,
and 58. Dahlgren completed an RI/FS, a PP, and a ROD for
Site 62. The installation completed IRAs for Sites 47b and 61b.
The Navy finalized two closeout documents for NFA at Sites 38
and 40. The installation completed RIs for Sites 20 and 61a and
conducted removal actions at Sites 4 and 15. The Navy utilized
diffusion bag technology for groundwater sampling in order to
assist with volatile organic chemical (VOC) contamination
concentrations at Site 20. Two RAB meetings were held, and a
presentation was made to the King George Board of
Supervisors on the status of the remediation efforts at
Dahlgren.
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Dahlgren completed an annual wetland monitoring report for
Sites 6, 9, 17, 25, 46, 50, and 58, an Appendix B closeout
report for Solid Waste Management Unit 128 OWS 1121,
initiated and completed the Site 9 marsh cap repair, and
installed a temporary methane gas intercept trench with gas
monitoring wells. The Navy completed the ROD amendment
and revised RD for Site 37, and initiated an RA. Dahlgren
completed an engineering evaluation and cost analysis for Site
14. The installation has planned additional trenching and soil
screening at Site 61a prior to recommendation of a final
remedy. The Navy also developed a new remediation team.
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The installation completed an IRA for Site 47a and the closeout
documents were submitted for review; however, technical and
contractual issues delayed two IRAs at Sites 4 and 15. The
installation completed a draft FS for Site 14; however, technical
issues delayed its completion.
The Navy held a public meeting to present the Site 37 amended
PP, and a RAB meeting was conducted.
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The Navy has identified no MMRP sites at this installation.
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Plan of action items for Naval Support Facility, Dahlgren are
grouped below according to program category.
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0 Complete an FS and a closeout document for
one site in FY07.
0 Complete PP and ROD for Site 20 in FY07, and
Site 61a in FY08.
0 Initiate and complete RA for one site in FY07
and FY08, respectively.
0 Initiate IRA at one site in FY07, and
complete in FY08.
0 Complete IRAs and the annual wetland
monitoring report for Sites 4 and 15 in FY08.
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There are no MMRP actions scheduled for FY07 or
FY08.
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