| Action Date |
Action |
Description |
DEC Staff |
| 2/15/2007 |
Spill Transferred from Prevention Preparedness and Response Program |
Site transferred by PERP staff Amanda Stark. Spill No. 06309926102; spill date = 9/18/06; substance = jet fuel; quantity unknown (greater than 100 gallons); PERP file no. 107.02.013. |
Mitzi Read |
| 4/23/2007 |
Exposure Tracking Model Ranking |
Initial ranking completed. |
Mitzi Read |
| 4/23/2007 |
Site Added to Database |
Site added to the database. |
Mitzi Read |
| 11/24/2008 |
CERCLA ROD Periodic Review |
ADEC issued a letter of concurrence on the 2008 Five-Year ROD review for Eielson AFB. In the letter ADEC concurred with the current remedies but recommends further work on the following: the vapor intrusion pathway needs to be evaluated for all potential receptors at WP45/SS57 site along with further evaluation of the selected remedy to ensure the Remedial Action Objectives are going to be met. The buried drums remaining at SS35 may still contain product that may pose a potential risk to ecological and human health risk in the future. The area of buried drums identified outside of SS37 may pose a threat of an imminent release of hazardous substances and warrants further investigation or response action. As stated in the 2008 Five-Year ROD Review, the overall long-term protectiveness determination for the Sitewide OU/Garrison Slough remedy will be further investigated. A Land Use Control Management Plan should be developed and implemented. |
Deborah Williams |
| 6/13/2014 |
Update or Other Action |
On April 23, 2014, the Alaska Department of Environmental Conservation and the United States Air Force reached agreement on the State-Eielson Air Force Base Petroleum Site Restoration Agreement (Two-party Agreement). This agreement was established to perform any necessary assessment, monitoring, remediation and cleanup determinations for petroleum contaminated sites at Eielson Air Force Base. This site was identified as a petroleum contaminated site requiring a response action and its cleanup will continue under Alaska regulations, following the procedures established in the agreement. |
Monte Garroutte |
| 7/24/2015 |
Update or Other Action |
Comments provided to Air Force on Draft 2015 Field Sampling Plan for Source Area PL001, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska Dated June 2015 |
Eric Breitenberger |
| 7/24/2015 |
Document, Report, or Work plan Review - other |
DEC provided comments on the "Draft 2015 Field Sampling Plan for Source Area PL001, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska dated June 2015 (the FSP). The FSP describes the installation of six new monitoring wells (MWs), and the subsequent sampling of those wells plus eight existing MWs, to determine if groundwater contamination is migrating downgradient of PL001 and SS086. Three of the new MWs are proposed for PL001, and three for SS086. |
Melinda Brunner |
| 8/7/2015 |
Document, Report, or Work plan Review - other |
DEC provided comments to the USAF on the draft "2014 Site Characterization Report, Various Sites, Eielson Air Force Base, Alaska dated June 2015 (the 2014 CRP SCR). The 2014 CRP SCR describes sampling activities completed at PL001(M), CS082, SS530, SS068, SS083, TU531, CS074, CG517, SS533, TU077, SS519, SS079, CS525 at Eielson Air Force Base in July, August and September of 2014. Sampling of soil and groundwater was conducted to evaluate data gaps from previous investigations; delineate the nature and extent of soil and groundwater contamination; determine the potential for co-mingling of plumes from separate sites; and to determine the need, or lack thereof, for further investigation at each site. |
Melinda Brunner |
| 8/28/2015 |
Document, Report, or Work plan Review - other |
DEC provided comments to the USAF on 8/28/15 on the "DRAFT 2014 Site Characterization Report For Sites Where Investigation is Complete: PL001 (A to L), SS066, SO501, SO503, CG505, CG527, MY529, Eielson Air Force Base, Alaska" dated July 2015. This report describes sampling activities completed at seven sites at Eielson Air Force Base in 2014. Sampling of soil and groundwater was conducted to evaluate data gaps from previous investigations; delineate the nature and extent of soil and groundwater contamination; determine the potential for co-mingling of plumes from separate sites; and to determine the need, or lack thereof, for further investigation at each site. |
Melinda Brunner |
| 9/14/2015 |
Site Characterization Workplan Approved |
DEC approved the "2015 Field Sampling Plan for Source Area PL001, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska" dated September 2015 (the FSP). The FSP describes the installation of five new monitoring wells, and the subsequent sampling of those wells plus nine existing monitoring wells, to determine if groundwater contamination is migrating downgradient of PL001 and SS086 source areas. |
Melinda Brunner |
| 3/18/2016 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments to the U.S. Air Force on the "Addendum to the 2014 Site Characterization Report at Source Area PL001 and 2014 Phase 2 Source Evaluation Report at Source Area SS086 (Draft)" dated 19 February 2016 (PL001/SS086 SCR Addendum). The PL001/SS086 SCR Addendum describes the installation of five new monitoring wells in 2015; the results of sampling 15 monitoring wells in 2015; and an analysis of remedial action alternatives for the sites. |
Melinda Brunner |
| 4/15/2016 |
Update or Other Action |
The USAF and DEC signed a memorandum for the record on 4/15/16 establishing monitoring boundaries for the entire South Loop (PL001) and airfield (SS086). Due to the difficulties in investigating and monitoring contamination within the flightline restricted areas, the monitoring boundary was established to define a management area. The boundary will be monitored to determine if contaminants from specific sites are migrating out of the South Loop (PL001) or main runway (SS086) areas. If contamination is migrating, additional activities may be required. |
Melinda Brunner |
| 11/4/2016 |
Site Characterization Report Approved |
DEC Approved the Addendum to the 2014 Site Characterization Report at Source Area PL001 and 2014 Phase 2 Source Evaluation Report at Source Area SS086 (Final), dated September 26, 2016. This report is an addendum to the 2014 Site Characterization Report for Various Sites including PL001 and the 2014 Source Evaluation Report for Source Area SS086. This addendum presents the results from the 2015 soil and groundwater sampling. Additionally, it proposed remedial action alternatives for Source Areas PL001 and SS086. Long Term Monitoring (LTM) and Institutional Controls (ICs) were recommended to monitor contaminated soil and groundwater within the monitoring boundaries. Site usage and large paved areas that cannot be disturbed limit the options for remedial action and further site characterization. Remedial action alternatives would need to be revisited if land use changes in the future or if contamination starts migrating beyond the monitoring area boundaries. |
Monte Garroutte |
| 11/14/2016 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the Draft 2014 Site Characterization Report for Various Sites, Appendix F - Data Quality Assessment, Eielson Air Force Base, Alaska (June, 2015). |
John O'Brien |
| 11/28/2016 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the Draft 2014 Characterization Report for Sites Where Investigation is Complete, Appendix F – Data Quality Assessment, Eielson Air Force Base, Alaska (June, 2015). |
John O'Brien |
| 12/16/2016 |
Document, Report, or Work plan Review - other |
DEC completed review of the 2014 "Site Characterization Report for Sites Where Investigation is Complete - Data Quality Assessment" and resolved all comments. |
Monte Garroutte |
| 3/7/2017 |
Site Characterization Report Approved |
DEC Approval of the 2014 Site Characterization for Multiple Sites (PL001A-L, SO066, SO501, SO503, CG505, CG527, and MY529), Report 1 (January 2017) |
John O'Brien |
| 3/7/2017 |
Site Characterization Report Approved |
DEC approved the 2014 Site Characterization for Multiple Sites (PL001 [M], SS068, CS074, TU077, SS079, CS082, SS083, CG517, SS519, CS525, SS530, TU531, and SS533), Report 2 (January 2017). Report 2 concluded that further investigation is required to fully delineate the nature and extent of soil and groundwater contamination present at all 13 Compliance Restoration Program (CRP) sites described. |
John O'Brien |
| 4/25/2017 |
Update or Other Action |
DEC reviewed and provided comments on the Draft Programmatic Quality Assurance Project Plan, Addendum No. 2, Eielson Air Force Base, Alaska (March, 2017). |
John O'Brien |
| 6/7/2017 |
Update or Other Action |
DEC Approved the 2016 Groundwater Sampling Activities and Results for the PL001 and SS086 Monitoring Areas Technical Memorandum (Final). |
John O'Brien |
| 10/23/2018 |
Update or Other Action |
DEC issued an approval letter for the 2017 Groundwater Sampling Activities and Results for the PL001 and SS086 Monitoring Areas Technical Memorandum, dated 26 March 2018. The tech memo describes the results of the 2017 groundwater monitoring at PL001 and SS086. |
Bri Clark |
| 4/19/2019 |
Update or Other Action |
DEC issued comments on the Final Interim Decision Document PL001 and SS086, Eielson Air Force Base, Alaska dated March 2019. Cleanup levels were updated throughout this document to reflect the 2018 DEC cleanup level changes. |
Bri Clark |
| 11/18/2019 |
Update or Other Action |
DEC approved and signed the Interim Decision Document for sites PL001 and SS086 on Eielson Air Force Base (AFB). The sites are managed under the State-Eielson AFB Petroleum Site Restoration Agreement. This interim DD is needed because the full extent of contaminated soil and groundwater could not be established or active treatment options could not be implemented on the runway and taxiways without critically disrupting the Eielson AFB mission. The selected remedies for Source Areas PL001 and SS086 are Monitor natural attenuation of groundwater and Maintain institutional controls (ICs) prohibiting the use of, and restricting the access to, groundwater or soil until cleanup is complete. |
Dennis Shepard |
| 4/22/2020 |
Document, Report, or Work plan Review - other |
DEC received a Draft Technical Memorandum for review and comment. The Technical Memorandum presents 2018 and 2019 Groundwater Sampling Activities and Results for the PL001 and SS086 Monitoring Areas, Eielson Air Force Base, Alaska.
|
Dennis Shepard |
| 4/22/2020 |
Document, Report, or Work plan Review - other |
DEC received a Technical Memorandum for 2018 and 2019 Groundwater Sampling Activities and Results for the PL001 and SS086 Monitoring Areas. |
Dennis Shepard |
| 5/18/2020 |
Document, Report, or Work plan Review - other |
DEC provided review comments for the Technical Memorandum 2018 and 2019 Groundwater Sampling Activities and Results for the PL001 and SS086 Monitoring Areas, 1 April 2020. Arsenic and Manganese were the only exceedances reported for PL001 and SS086 greater than the ADEC Table C groundwater cleanup levels, but were at stable concentrations. No PL001 wells had exceedances greater than the decision document cleanup levels. |
Dennis Shepard |
| 5/17/2022 |
Document, Report, or Work plan Review - other |
DEC provided comments for the Draft Work Plan, 2022 Installation-Wide Monitoring Program, Eielson AFB, Alaska, Revision 02, April 2022 Eielson Air Force Base, Alaska. The work plan identifies annual sampling requirements for 1 monitoring well at site PL001. |
Dennis Shepard |
| 9/18/2023 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Eielson AFB Two-Party Sites, Periodic Review - Draft, August 2023". The document reviewed and recorded the current status of two party sites (managed by USAF and DEC) at Eielson Air Force Base. |
Axl LeVan |
| 12/21/2023 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved "Draft-Final Periodic Review Report for Two-Party Sites at Eielson Air Force Base, Alaska, November 2023". This report documents the evaluation of the Interim Land Use Controls (Interim LUCs) for 23 two-party sites at EAFB. |
Axl LeVan |
| 6/21/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Periodic Review Report for Two-Party Sites, Eielson Air Force Base, Alaska, April 2024." DEC had previously approved the document, but is reviewing an updated version after substantial changes to the document. This report documents the evaluation of the Interim Land Use Controls (Interim LUCs) and remedy implementation for 17 sites at EAFB. |
Axl LeVan |
| 7/9/2024 |
CERCLA ROD Periodic Review |
DEC reviewed and approved the "Final Periodic Review Report for Two-Party Sites, Eielson Air Force Base, Alaska, July 2024". This report documents the evaluation of the Interim Land Use Controls (Interim LUCs) for 17 sites at EAFB. DEC approved a previous version of periodic review before substantial changes based on USAF legal review. Based on this DEC provided a new comment matrix addressing the updated version. |
Axl LeVan |
