| Action Date |
Action |
Description |
DEC Staff |
| 3/26/1993 |
Update or Other Action |
Department of Defense and ADEC joint Technical Memorandum of understanding signed concerning the Base-wide Groundwater. Signatories: ADEC SCRO-Jennifer Roberts Remedial Project Manager and USAF Joseph Williamson Chief Environmental Programs and Restoration.
As a result of the base-wide groundwater study and the FY92 field work that occurred at Operable Units (OUs) 1, 2, and 5 it appears that a large portion of the groundwater flows into OU5 (attachment 1-contour map). Based on this information Elmendorf would like to move all upgradient groundwater into the OU5 Feasibility Study, Proposed Plan and Record of Decision. This means we would address all groundwater from upgradient sources from the CERCLA and SERA program (ST20, OU3, and OU4) and OUs 1 and portions of OU2) and SERA) at OU5 instead of at each individual source area (see attachment 2-Area Map). Those sites which have free phased product would be looked at to see if there is an available technology to clean them up in a cost effective way. Soil contamination would still be addressed at the source areas. NOTE: addressed at the source areas is interpreted by ADEC as removal through excavation or active treatment systems (e.g. high vacuum extraction, bioventing, etc.). |
Jennifer Roberts |
| 4/21/1995 |
Update or Other Action |
AF memo: 18 April 1995 UST Meeting. Elmendorf AFB will accomplish the following actions regarding UST Projects. These actions are based upon conversation between, John Mahaffey, Larry Opperman and yourself. EAFB will make every effort to accomplish a clean closure of a UST removal site if possible.
UST removal locations requiring cleanup action will be transferred into the State-Elmendorf Environmental Restoration Agreement (SERA). A list of sites requiring cleanup will be coordinated with your office. The presumptive remedy for contaminated UST sites in the outwash plain only will be bioventing technology. Contaminated soils exceeding cleanup levels may be placed back into the excavation only if the site assessment (SA) indicates a need for further cleanup action.
Contaminated UST sites not in the outwash plain will require further investigation to determine appropriate cleanup options. We will make every attempt possible to assure new USTs or new aboveground tanks are not installed in any way that would hamper future access for cleanup. The project will first accomplish removal of all of the USTs. SA information will be used to prioritize sites for cleanup using existing project funds. Additional funding will be requested to complete cleanup if available. Sites not addressed for cleanup due to exhausted funding will be placed into SERA Phase IV. John Halverson signed on April 21, 1995. Memo was signed by Douglas G. Tarbett, Maj, USAF, Chief, Environmental Compliance. CC: 3 WG/JA and 3 SPTG/CE. |
John Halverson |
| 10/17/1996 |
Institutional Control Record Established |
Air Force memo: Restricted Use of the Shallow Aquifer on Elmendorf Air Force Base (EAFB) signed by William R. Hanson P.E. GM-14 Chief Environmental Flight dated October 17, 1996 Memorandum for 3 SPTG/CEC/CEO from 3 SPTG/CEV:
1) Due to the contamination and commitments to regulators the use of the shallow aquifer for any purpose on Elmendorf is not allowed. Please see the attached Facility Board minutes (March 29, 1994 0930-Item 9 of minutes). Mr. William Hanson, Chief of Environmental, briefed to the Facilities Board the policy to not use the shallow water aquifer due to contamination. The Facilities Board approved this policy. Minutes approved by Thomas R. Case Brigadier General USAF Commander. The Installation Restoration Program (IRP) has additional Record of Decisions (RODs) for Operable Units 3 and 6 which require, as a stipulation of the agreement with Environmental Protection Agency and Alaska Department of Environmental Conservation, this aquifer remain unused.
2) Our concern is that key personnel in the review process within Civil Engineer Squadron are aware of these policies and that these policies are reviewed on a recurring basis. It is imperative that this restriction be recognized and observed during engineer reviews and operations.
3) If you have questions on this subject, please contact Mr. Joe Williamson at 552-7229. |
Jennifer Roberts |
| 4/30/1999 |
Update or Other Action |
The 1000 gallon single wall steel tank identified as STMP 622 has an unknown installation date. However, a 1944 building drawing shows a UST at this location. It was taken out of service by the Air Force in October 1998. On October 9, 1998, the UST was removed. It had not been used Only one of the two required confirmation samples were taken. The one analytical soil sample was collected from the base of the excavation, on the northwest end under the fill pipe. This sample was analyzed for diesel-range organics (DRO) and benzene, toluene, ethylbenzene, and total xylenes (BTEX). The maximum DRO concentration was 210 milligrams per kilogram (mg/kg), at 8 feet bgs. BTEX concentrations were not detected above their respective method reporting limits. The method reporting limit for benzene was 0.052 mg/kg. Analytical samples were not collected from the stockpiled soil because field screening did not indicate the presence of contamination. The stockpiled soil was used as backfill.
A Method One Score Sheet is attached. The site-specific matrix score corresponds to Category C cleanup criteria. All results are below Alaska Department of Environmental Conservation (ADEC) 18 AAC 75, Method One, Category C cleanup criteria. |
Louis Howard |
| 7/28/2002 |
Update or Other Action |
ADEC (CS Program S. Bainbridge, Leslie Pearson PER Program) and Air Force (Daniel Barnett) signed the Operational Agreement (OA) concerning presumptive remedies for cleanup of certain petroleum oil and lubricant releases on the outwash plain portion of Elmendorf AFB, Alaska. This OA establishes and describes pre-approved presumptive remedies but does not establish an exclusive set of cleanup options and nothing in the memorandum prohibits EAFB from seeking or obtaining ADEC approval to implement alternative release response and remedial action plans.
For new POL spills in the outwash plain that occur in areas with no operational restrictions or interference from surrounding structures, ADEC approves immediate remediation of contaminated media after free product has been recovered in a manner that minimizes the spread of contamination into an uncontaminated area by using containment, recovery, disposal techniques appropriate to site conditions. The presumptive remedy for new POL spills on the outwash plain consist of excavation, treatment, and disposal of all impacted soil.
On a case-by-case basis, ADEC will evaluated the need for recovery of free product from the water table. Finally groundwater monitoring and Ics placed on the shallow aquifer restricting its use as a drinking water source will be required until such a time that the appropriate groundwater remedial goals are met. If additional institutional controls are required, these controls will be developed by EAFB in consultation with ADEC.
The OA does not apply to spills impacting surface waters. Nothing in the OA relieves, extends or changes the applicable requirements of 18 AAC 75 and 78 for the proper treatment, storage or disposal of contaminated media that result from the implementation of this OA. |
Steve Bainbridge |
| 10/21/2002 |
Update or Other Action |
Letter sent to Joe Williamson dissolving the State Elmendorf Environmental Restoration Agreement. The Alaska Department of Environmental Conservation (DEC) has reviewed the issue of abolishing the State Elmendorf Environmental Restoration Agreement (SERA) per your recommendation. Elmendorf Air Force Base and DEC entered into the SERA in 1992. The agreement was developed as a tool to bring the Base into compliance with Alaska's regulations addressing underground storage tanks, oil and other hazardous substance releases and solid waste.
Since that time, Elmendorf has made significant progress in investigating and cleaning up historic contamination problems. Many of the sites covered by the SERA have been successfully cleaned up and closed. Cleanup is underway at the remaining sites.
Additionally, Alaska has amended the regulations addressing fuel storage tanks, oil and other hazardous substance spills and solid waste. We concur with you that the SERA is no longer a necessary or beneficial. This letter serves as notice that DEC will end oversight on environmental work at Elmendorf by using the SERA. Instead, it is understood that the sites and programs formerly addressed by SERA: solid waste, underground storage tanks (UST), and oil and other hazardous substance discharges will be addressed in accordance with 18 AAC 60, 18 AAC 78 and 18 AAC 75. |
Jennifer Roberts |
| 12/5/2003 |
Long Term Monitoring Established |
Because ST902 is located in the OU 5 Groundwater study area and the Air Force is monitoring the groundwater on a regional basis, this site will be included as a part of that monitoring program. |
John Halverson |
| 12/5/2003 |
Conditional Closure Approved |
John Halverson Acting Section Manager sent a NFRAP letter to John Mahaffey re: Compliance funded sites review and response. Residual soil and/or groundwater contamination is present at all of the sites. Based on our review, thirty-six (36) of the sites do not appear to pose an unacceptable risk to human health or the environment and are suitable for a No Further Remedial Action Planned (NFRAP) determination. DEC's NFRAP determination indicates that no additional cleanup is necessary, but that institutional controls and/or long-term monitoring are necessary. We have determined that the groundwater impacts at these sites are being adequately addressed within the base-wide groundwater monitoring program and the Operable Unit 5 groundwater treatment system. Because petroleum contaminated soil (e.g. contaminant levels higher than Method 2 cleanup levels in Tables B1/B2 found in 18 AAC 75.341) remains at these sites, the Base Master Plan needs to be updated to document the locations of residual contamination and the need to manage contaminated soil properly during any future construction or excavation work. Sites in addition to ST902 referred to in the letter include ST sites: 404, 405, 411, 413, 414, 415, 430/9, 431, 501, 502, 503, 504, 505/9, 511, 512, 513, 514, 515, 517, 518, 519, 520, 521, 525, 528, 530, 533, 535, 536, 537, 700, 701, 902, 903, 904, and 906. Sites ST 420 and ST 524 are not located within the capture zone of the Operable Unit 5 treatment system (the outwash plain) and contain higher contaminant levels. Therefore, the ADEC is requesting additional site characterization at these two sites. |
John Halverson |
| 4/30/2004 |
Site Added to Database |
DRO. |
Sarah Cunningham |
| 9/10/2007 |
GIS Position Updated |
61.2424 N latitude -149.8085 W longitude UST Decommissioning and Site Assessment - STMP 622 Final dated April 1999- Figure 2, USAF 3rd CES, Elmendorf AFB, Alaska, STMP 622 Bldg. 4-810, Site Location Map dated January 1999 (contract No. F41624-94-D-8070-0014) and the 2004 Draft Environmental Atlas EAFB page 175 M38. |
Louis Howard |
