Appendix M: Installation Narrative Summaries - denix
Appendix M: Installation Narrative Summaries - denix
Appendix M: Installation Narrative Summaries - denix
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The mission of Mountain Home Air Force Base (AFB) is to<br />
provide composite combat air power worldwide. EPA placed the<br />
installation on the NPL in August 1990 and the Air Force signed<br />
a federal facility agreement (FFA) in January 1992. In 2005, the<br />
BRAC Commission recommended Mountain Home AFB for<br />
realignment. Sites identified at the installation include: landfills,<br />
fire training areas, a fuel hydrant system spill area, disposal<br />
pits, surface runoff areas, wash racks, ditches, underground<br />
storage tanks, petroleum/oil/lubricant (POL) lines, and a<br />
low-level radioactive material disposal site. In FY94, the<br />
installation converted its technical review committee to a<br />
Restoration Advisory Board. In FY00, the installation updated<br />
the community relations plan. Mountain Home AFB completed<br />
5-year reviews in FY01 and FY06.<br />
Environmental studies conducted since FY83 have identified 32<br />
sites at this installation. To improve and accelerate site<br />
characterization, the installation grouped the sites into operable<br />
units (OUs). To date, a no further action (NFA) Record of<br />
Decision (ROD) has been signed for OUs 2 and 4. RODs have<br />
also been signed for OUs 1, 3, 5, and 6; the lagoon landfill; and<br />
Fire Training (FT) Area 8. The cleanup progress at Mountain<br />
Home AFB for FY02 through FY05 is detailed below.<br />
In FY02, the installation installed five wells, three with vapor<br />
sampling ports to assist in monitoring regional groundwater,<br />
and eight additional wells to assist in monitoring perched<br />
groundwater and benzene, toluene, ethylbenzene, and xylene<br />
compounds at Site ST 11. Seventeen sites that were<br />
recommended for additional institutional controls in the 5-year<br />
review were sampled. The installation began a site inspection<br />
(SI) for three areas of concern (AOCs) to determine whether<br />
the AOCs qualified as sites.<br />
In FY03, the installation evaluated the results of the SI for the<br />
three AOCs and determined that NFA was necessary.<br />
Monitoring of vapor ports commenced and monitoring of<br />
perched and regional groundwater continued. An additional<br />
regional aquifer groundwater well was installed to satisfy RCRA<br />
post-closure requirements at Site ST 13. Samples analyzed<br />
from two regional aquifer monitoring wells indicated isolated<br />
values for benzene and trichloroethylene (TCE), which<br />
exceeded maximum contaminant levels.<br />
Air Force<br />
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In FY04, the installation completed an interim remedial design<br />
and installed 10 new groundwater and vapor monitoring wells<br />
into the deep aquifer. Using wells installed in 2002, the<br />
installation continued remediation of shallow groundwater at<br />
Site ST 11, and continued to monitor volatized vapors from<br />
vadose zones at eight sites. In addition, Mountain Home AFB<br />
continued to monitor perched groundwater and regional<br />
groundwater, and removed TCE-contaminated soils from hot<br />
spots at Site SD 24.<br />
In FY05, Mountain Home AFB continued to monitor wells for<br />
fuel and TCE vapors at eight sites and conducted groundwater<br />
monitoring. The installation awarded a performance-based<br />
contract. The Air Force updated its Military Munitions Response<br />
program (MMRP) inventory. No MMRP sites were identified at<br />
this installation during the inventory development.<br />
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Mountain Home AFB completed a 5-year review, and drafted<br />
an explanation of significant differences (ESD) for Landfills<br />
(LFs) 01 and 02. The installation continued to monitor wells for<br />
fuel and TCE in groundwater, and completed vapor intrusion<br />
sampling. The Air Force drafted an engineering evaluation and<br />
cost analysis for removal actions at Sites OT 16, LF 23, SD 27,<br />
and SS 29, and initiated pilot studies at Sites FT 08, ST 11, ST<br />
13, and SD 24.<br />
Technical issues delayed the hot spot removals at Sites SD 27<br />
and SS 29, and also delayed completion of the OU 3 ROD<br />
amendment.<br />
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The Air Force has identified no MMRP sites at this installation.<br />
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Plan of action items for Mountain Home Air Force Base are<br />
grouped below according to program category.<br />
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0 Complete ESDs for LFs 01 and 02 in FY07.<br />
0 Complete removal actions at Sites OT 16, LF<br />
23, SD 27, and SS 29 in FY07.<br />
0 Complete pilot studies for Sites FT 08, ST<br />
11, ST 13, and SD 24 in FY07.<br />
0 Complete vapor intrusion evaluation in FY07.<br />
0 Complete groundwater remedial<br />
investigation/feasibility study amendment in<br />
FY07.<br />
0 Complete OU 3 ROD amendment in FY08.<br />
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There are no MMRP actions scheduled for FY07 or<br />
FY08.<br />
M-134
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