Luke Air Force Base

Planes taxiing on runway at Luke Air Force Base

Luke Air Force Base | Site History: Page 2 of 3




1990: The site was placed on the EPA’s NPL on August 30th. The primary use of the site was to provide advanced flight training to fighter pilots. Discharges and waste disposal practices at LAFB resulted in soil contamination. The site participated in the IRP, a specially funded program established by the Department of Defense (DoD) in 1978 to identify, investigate and control the migration of hazardous contaminants at military and other DoD facilities. A Federal Facilities Agreement to conduct the site cleanup plan was signed in Sept. 1990.

1997 - 2002: LAFB conducted a final potential source of contamination inspection in August 1997. Also, EPA and ADEQ conducted a final site inspection in April 2000 and determined that the AF has constructed the remedy in accordance with the requirements in the RODs for the entire site and the remedial action work plans. EPA concurred on the final close-out report for LAFB on April 26, 2001. An institutional control plan dated Dec. 15, 2001 was developed by the AF, and EPA concurred on the plan on January 8, 2002. In 2002, the first LAFB FYR report was completed, and EPA concurred on the review in January. The LAFB was officially deleted from the NPL list on April 22nd; however, there are institutional controls which serve to maintain the current Site conditions and control the risks to human health by prohibiting residential development.

2007: The second FYR was completed in June.

2008: New groundwater monitor wells were installed in April to replace submerged wells. Long-term monitoring of ten IRP sites continued, including the fire training area, bulk fuels storage, wastewater treatment annex landfill, oil/water separator canal and former liquid waste storage facility.

2009: An interim annual groundwater monitoring report summarizing the results of the annual groundwater monitoring activities was conducted at sites ST-18 and SS- 42 as part of the USAF Environmental Restoration Program (ERP). The primary objectives of the groundwater long-term monitoring (LTM) were to document the presence or absence of groundwater contamination in accordance with the Operable Unit (OU)-1 and OU-2 RODs. Groundwater level measurements and groundwater sampling was conducted in May. The results of the annual groundwater monitoring event conducted were consistent with previous years’ annual monitoring data.

The Interim Annual Gamma Radiation Monitoring report (also part of the USAF ERP) summarized the results of the annual gamma radiation monitoring activities that were performed at site RW-02. Gamma radiation measurements were collected from five existing monitor points. The measurements collected during this monitoring event remain consistent with previous years’ monitoring events. The measurements recorded from monitoring points MP-1, MP-2, MP-3, and MP-4 did not exceed the action level of twice the background readings. The measurements were comparable with the measurements collected from a background monitoring point. These results indicate that the containment structure for the buried radiological material remains intact and that the surrounding soil does not appear to have been impacted by this material.