Appendix M: Installation Narrative Summaries - denix
Appendix M: Installation Narrative Summaries - denix
Appendix M: Installation Narrative Summaries - denix
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The Yuma Marine Corps Air Station (MCAS) supports tactical<br />
aircrew combat training for Pacific and Atlantic Fleet Marine<br />
Corps Forces. Initial investigations conducted at the installation<br />
identified 20 CERCLA sites and 5 underground storage tank<br />
(UST) sites. Site types include landfills, sewage lagoons, liquid<br />
waste disposal areas, and ordnance and low-level radioactive<br />
material disposal sites. The installation was placed on the NPL<br />
in February 1990 and signed a federal facility agreement (FFA)<br />
in January 1992. In 2005, the BRAC Commission<br />
recommended Yuma MCAS for realignment. The installation<br />
completed a 5-year review for Operable Unit (OU) 2 in FY03<br />
and updated it in FY04. The installation also completed a<br />
5-year review for OU 1 in FY04.<br />
To date, 25 <strong>Installation</strong> Restoration Program (IRP) sites and 6<br />
Military Munitions Response Program (MMRP) sites have been<br />
identified at this installation. The installation signed Records of<br />
Decision (RODs) for all IRP sites in the late 1990s. Fifteen of<br />
the 18 soil IRP sites have received clean closure and the<br />
remaining 3 soil sites have their remedies in place. Five UST<br />
IRP sites have received clean closure. One groundwater site<br />
(OU 1) is made up of four chlorinated solvent plumes (Areas 1,<br />
2, 3, and 6) and two fuel plumes (4, 5, and 5a). OU 1 Plumes 4,<br />
5, 5a, and 6 have been clean closed. The cleanup progress at<br />
Yuma MCAS for FY02 through FY05 is detailed below.<br />
In FY02, the installation finalized the land use control<br />
implementation plan (LUCIP) and a long-term management<br />
(LTM) plan. It also finalized Yuma Station Order 5090, which<br />
formally directs tenants and contractors to incorporate the land<br />
use controls (LUCs) provided in the LUCIP into the existing<br />
land use planning and management systems. The installation<br />
master plan was updated. Yuma MCAS implemented the<br />
institutional controls (ICs) and LUCs to meet the intent of the<br />
OU 2 ROD. The installation initiated the first 5-year review for<br />
OU 2. Remedial action operations (RA-O) and operation and<br />
monitoring (O&M) of the groundwater remedial systems for OU<br />
1 continued. Monitoring Areas 2, 3, and 6 of OU 1 continued<br />
under monitoring and natural attenuation and the applicable<br />
LUCs and ICs. The Navy completed an inventory of all MMRP<br />
sites. Six MMRP sites were identified at this installation.<br />
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In FY03, Yuma MCAS completed and finalized the first 5-year<br />
review for OU 2. The installation completed optimization of one<br />
of the existing RA-O systems at Plume Area 1. The installation<br />
met remediation goals for the other RA-O system at the leading<br />
edge of Plume Area (LEPA) 1. In addition, the installation<br />
continued O&M at one groundwater remedial system at OU 1.<br />
The installation also continued LTM at Areas 2, 3, and 6 of OU<br />
1 under monitored natural attenuation and the applicable LUCs<br />
and ICs.<br />
In FY04, Yuma MCAS completed and finalized the first 5-year<br />
review for OU 1 and updated the OU 2 5-year review. The<br />
installation received Plume Areas 5a and 6 site closure. The<br />
installation completed and finalized the groundwater flow and<br />
transport model. In addition, the installation continued O&M at<br />
one groundwater remedial system at OU 1. The installation also<br />
continued LTM of Areas 1, 2, and 3 at OU 1. One RA-O system<br />
located in the LEPA was in temporary shutdown status.<br />
In FY05, the installation abandoned monitoring wells at Plume<br />
Areas 5a and 6. The Navy requested permanent shutdown of<br />
RA-O system located at the LEPA and site closure at Area 2.<br />
The installation continued O&M at one groundwater remedial<br />
system at OU 1, and continued LTM at Areas 1, 2, and 3. The<br />
installation investigated and found no significant contamination<br />
at Plume Area 3.<br />
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Yuma MCAS requested and received site closures at Plume<br />
Areas 2 and 3. The Navy requested permanent shutdown of<br />
RA-O system located at the LEPA, and shutdown was<br />
approved by EPA. The installation reduced LTM from quarterly<br />
to semi-annually, and reduced the number of monitoring wells<br />
by 50 percent. The installation also continued O&M at one<br />
groundwater remedial system at OU 1, and continued LTM at<br />
Plume Area 1.<br />
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The installation began work plans for MMRP site inspections<br />
(SIs).<br />
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Plan of action items for Yuma Marine Corps Air Station are<br />
grouped below according to program category.<br />
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0 Continue LTM at Area 1 in FY07.<br />
0 Abandon monitoring wells at Areas 2 and 3 in<br />
FY07.<br />
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0 Begin fieldwork for SIs at MMRP sites in<br />
FY07.<br />
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M-215
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