| Action Date |
Action |
Description |
DEC Staff |
| 1/21/1992 |
Site Added to Database |
This site is included in the state EPA Eielson FFA 100.38.011. |
Former Staff |
| 8/3/1992 |
Meeting or Teleconference Held |
Meeting regarding SERs in Seattle. Discussed requirements for NFA. |
Former Staff |
| 9/3/1992 |
Meeting or Teleconference Held |
Meeting EAFB regarding NFA. Discussed site specific data regarding DP40 and reasons for NFA. Documentation placed in file. Formal documentation to follow. |
Former Staff |
| 9/22/1992 |
Update or Other Action |
(Old R:Base Action Code = F - Site Treatment, Soil/H2O). ADEC contracted to reactivate sump collection operations. Recovery minimal. Approximately 40,000 total gallons recovered (since 1980) by fall of 1984. |
Former Staff |
| 2/23/1993 |
Update or Other Action |
(Old R:Base Action Code = F - Site Treatment, Soil/H2O). Shannon and Wilson installed thirty combination recovery and monitoring wells. Data obtained regarding extent of oil contamination and product thickness. 203 gallons of oil were recovered in 1988. Report dated June 1989. |
Jeff Peterson |
| 8/12/1993 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). NFA accepted - letter and in Seattle meeting with EPA EAFB. |
Rielle Markey |
| 8/23/1993 |
Site Closure Approved |
Site CLOSED as per verbal from project manager Rielle Markey. |
Rielle Markey |
| 9/24/1996 |
Record of Decision |
Final Site-Wide Record of Decision, September 1, 1996; two documents received. |
Rielle Markey |
| 8/26/2004 |
GIS Position Updated |
Position acquired using "Base MW Map 2004" CAD drawing from EIAFB georeferenced to QuickBird Satellite imagery, NAD27. Also updated Section to 12 from 11. |
Torsten Ernst |
| 7/6/2006 |
Update or Other Action |
ADEC agreed to decrease sampling of the North Boundary Wells from annual sampling to biennial. Upcoming measurements will be summer 2007, 2009, 2011, etc. Concentrations of VOCs, SVOCs, and metals in the sentinel wells have been monitored annually since 1992 and there has been no detection of contamination. |
Emily Youcha |
| 12/22/2016 |
Update or Other Action |
DEC approved the Remedial Investigation / Feasibility Study Management Plan for Operable Unit 2 Source Areas, Eielson Air Force Base, Alaska (November, 2016). This applies to 7 source areas inside OU2 and 21 source areas outside of OU2. |
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 |
| 6/9/2017 |
Update or Other Action |
DEC Approved the 2017 Field Sampling Plan, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska. |
John O'Brien |
| 11/20/2018 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Draft Remedial Investigation/Risk Assessment Report for OU2 Source Areas, Eielson Performance Based Remediation, Eielson Air Force Base, Alaska," dated September 2018. |
Bri Clark |
| 1/7/2020 |
Meeting or Teleconference Held |
A comment resolution meeting was held to discuss the remaining issues for the OU-2 remedial investigation-risk assessment report. DP040 contaminants and extent of contamination were discussed. The remedial investigation identified Metals (arsenic, chromium, and cobalt) exceeding Background levels in groundwater. Polycyclic Aromatic Compounds (benzo(a)anthracene, benzo(a)pyrene, and the Volatile Organic Compound, Trichloroethylene (TCE) exceed Table B1, migration to groundwater cleanup levels in soil at Source Area DP040. Metal concentrations of Chromium, mercury, and thallium exceed background levels in soil. Some uncertainty still exists concerning the Metals exceeding background levels and further investigation will be recommended. |
Dennis Shepard |
| 8/4/2020 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (DEC) completed a backcheck review of the responses to DEC comments originally provided on November 30, 2018 for the draft version of the Final Supplemental Remedial Investigation/Risk Assessment Report for OU2 Source Areas, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska, June 2020. This report summarizes the remedial investigation (RI)/risk assessment (RA) activities conducted from 2016 through 2017 at source areas in Eielson Air Force Base Operable Unit 2 (OU2). The backcheck of the responses and redline document found that all responses were acceptable and the document is being finalized for DEC and EPA approval. |
Dennis Shepard |
| 10/23/2020 |
CERCLA RI Report Approved |
The Final Supplemental Remedial Investigation/Risk Assessment Report for OU2 Source Areas, Eielson Air Force Base, September 2020 was approved by EPA and DEC on this date. The report summarizes the remedial
investigation (RI)/risk assessment (RA) activities conducted from 2016 through 2017 at 11 source areas within Eielson Air Force Base Operable Unit 2 (OU2). |
Dennis Shepard |
| 8/29/2022 |
Document, Report, or Work plan Review - other |
DEC provided backcheck review comments for the Final Supplemental Remedial Investigation Work Plan, Eielson Air Force Base, Alaska (August 2022). The Supplemental Remedial Investigation (RI) Work Plan describes the 2022 RI activities to be conducted at Eielson Air Force Base, Alaska. The scope of the Supplemental RI is to address current data gaps at the CERCLA source areas on Eielson AFB for all operating units. |
Dennis Shepard |
| 9/19/2022 |
CERCLA RI Plan Approved |
EPA and DEC provided a joint approval for the Final Supplemental Remedial Investigation Work Plan Eielson Air Force Base, Alaska (September 2022). The scope of this Supplemental RI is to address current data gaps at the CERCLA source areas on Eielson AFB. The data gaps are generally related to the incomplete characterization of site contaminants under the 2015-2021 Performance Based Remediation (PBR) and emerging contaminants identified since the 2015-2021 PBR. |
Axl LeVan |
| 1/17/2023 |
Document, Report, or Work plan Review - other |
DEC provided comments for the Draft Sampling and Analysis Plan, Repair Pump House at the Combined Heat and Power Plant Eielson Air Force Base, Alaska. The SAP describes design and construction of a new pump house near the Combined Heat and Power Plant at Eielson Air Force Base, Alaska. Due to the proximity of known contamination, field screening of excavated soils is required. Polyfluoroalkyl substances (PFAS) contaminated groundwater underlies the site and PFAS contamination is expected in smear zone soils and below the groundwater table.
|
Dennis Shepard |
