| 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 |
| 12/3/1992 |
Update or Other Action |
Received documents from EAFB on OU 3, 4 and 5. These documents are the quality-assured field sampling data. Markey is now reviewing them. Item # 35 and 36, from the CS/DOD bookcase. |
Rielle Markey |
| 2/23/1993 |
Update or Other Action |
(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS database Notification Letter to RP requesting update and more environmental information concerning contaminated site. Department of the Air Force responded with update of requested site information on 3-17-93. |
Jeff Peterson |
| 7/15/1993 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Comments on Draft RI document. Contaminants of concern are in groundwater. Benzene and floating product. |
Rielle Markey |
| 8/12/1993 |
Meeting or Teleconference Held |
Meeting in Seattle with EAFB and EPA. Contaminants of concern are coming either from LF03/09 or LF13/26. This site will be addressed in the feasibility study for those sites. It will not have a feasibility study of its own. |
Rielle Markey |
| 10/18/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 9/30/1995 |
Update or Other Action |
Eielson AFB Operable Units 3, 4 and 5 ROD includes 20 source areas that have been combined because of commonalities in contamination. These source areas are DP44, WP45, SS57, SS56, SS61, DP25, ST27, WP33, SS35, SS36, SS37, SS39, SS63, ST58, SS64, LF02, LF03, FT09, LF04, and LF06. |
Clint Adler |
| 9/30/1995 |
Update or Other Action |
(Old R:Base Action Code = NFA - No Further Action Required (CERCLA)). These 10 Eielson AFB OU 3, 4 and 5 source areas (ST27, WP33, SS36, SS37, SS39, SS63, SS64, LF02, and LF06) will receive no further remedial action under CERCLA because they present little risk to human health and the environment. This determination was based on a remedial investigation/baseline risk assessment and a site-wide draft ecological risk assessment. Although no further action is required, the groundwater at these source areas will continue to be monitored as part of the Site-Wide Program to confirm the results of the Remedial Investigation. |
Clint Adler |
| 1/16/1996 |
Update or Other Action |
NFA under CERCLA. |
Clint Adler |
| 2/16/1996 |
Update or Other Action |
(Old R:Base Action Code = RA - Remedial Action). Received Remedial Action Workplan. |
Clint Adler |
| 8/1/1996 |
Update or Other Action |
Received 2 copies on 8/23/1996 of the unsigned final, Record of Decision for OU-4, Fort Wainwright, Fairbanks, Alaska, from the U.S. Army. |
Rielle Markey |
| 9/24/1996 |
Record of Decision |
Final Site-Wide Record of Decision, September 1, 1996; two documents received. |
Rielle Markey |
| 3/24/1997 |
Update or Other Action |
Site update by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 12/4/95. |
S&W |
| 1/9/2004 |
Update or Other Action |
Staff is reviewing the draft final Five-Year Review for Eielson Air Force Base. The majority of ADEC’s comments on the original draft document have been addressed. There are a few items that are still not satisfactory, but staff expects to get resolution on these items in the next week and have a document ready for signature by the end of the month. |
Ann Farris |
| 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 14 from 12. |
Torsten Ernst |
| 12/20/2004 |
Meeting or Teleconference Held |
Staff held a meeting to discuss recent benzene contamination found in wells downgradient from this site. Diesel was found in the ground water at the nearby utilidor. A free-product recovery system is in place. The suspected source area is upgradient of the wells and consists of buried drums and tanks. The tanks were removed in 1997 but the drums remain in place. Options were discussed and ADEC recommends placing the site into the long-term monitoring program with increased monitoring to evaluate contaminant concentrations and/or conducting a drum investigation and removal. |
Emily Youcha |
| 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 |
| 9/25/2007 |
Meeting or Teleconference Held |
Contaminated Sites staff participated in a facilitated three-party meeting with the Air Force and Environmental Protection Agency (EPA) covering the environmental restoration at Eielson Air Force Base. The meeting was held in Seattle at the EPA Region 10 office. CS and the facilitator called for the meeting due to poor communication between the three parties and growing disagreements on matters fundamental to regulatory oversight on Eielson. Initially, each of the three parties was given an opportunity to talk generally about their involvement with the work at Eielson and their concerns. This lead to discussions of the Federal Facility Agreement (FFA) between the parties for base, as it appears that each party interprets specific sections of the FFA differently. Other topics discussed included the applicability of Freedom of Information Act exclusions applied to draft documents submitted to DEC, Eielson's plans for changing the frequency of groundwater monitoring for selected contaminated sites, vapor intrusion as a pathway to reconsider in the upcoming five-year review of records of decision, challenges posed by enforcing institutional controls as part of site remedies, and spill reporting coordination with DEC. |
Deborah Williams |
| 2/28/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Janice Wiegers |
| 7/14/2008 |
Meeting or Teleconference Held |
ADEC participated in Eielson's 5 year ROD Review with EPA and Eielson. The sites covered in the ROD Review were the following: ST20, ST48, SS50-52, ST10/SS14, ST13/DP26, DP44, WP45/SS57, ST56, SS61, DP25, ST58, LF03/FT09, WP38 and SS67. Bioventing systems for ST10/SS14 and ST13/DP26 will cease operation during the summer of 2008. ADEC is concerned about LTM issues with SS35 and SS37 because of the potential for spills to be released from buried containerized wastes which are present at both of these sites. The vapor intrusion pathway will be evaluated at many of the sites where there are volatile compounds as a COC at the site and where there are potential receptors. All of these sites will be incorporated into Eielson's Land Use Control plan for the Base and the long term monitoring will be Event Driven Monitoring Program. |
Deborah Williams |
| 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 |
| 6/14/2011 |
Site Visit |
Contaminated Sites staff participated in an all-day site visit that included LF03/FT09, ST10/SS14, DP25, ST27, SS35, SS37 and the stockpile containment area. Drums were seen in and adjacent to the pond at SS35 and both petroleum and biogenic sheens were observed on the surface of the pond. All stockpiles in the containment area were covered but two stockpiles were not labeled and from unknown locations. |
Kathleen Beutel |
| 6/14/2011 |
Site Visit |
Contaminated Sites staff participated in an all-day site visit that included LF03/FT09, ST10/SS14, DP25, ST27, SS35, SS37 and the stockpile containment area. Drums were seen in and adjacent to the pond at SS35 and both petroleum and biogenic sheens were observed on the surface of the pond. All stockpiles in the containment area were covered but two stockpiles were not labeled and from unknown locations. |
Kim DeRuyter |
| 5/7/2013 |
Site Visit |
Site visit conducted in preparation for the FYR. A passive soil gas investigation is planned for this site this summer. A small connecting road was removed last summer. Snow buntings were observed at the site. |
Kim DeRuyter |
| 12/12/2013 |
Document, Report, or Work plan Review - other |
Passive Soil Gas/Ground Penetrating Radar/Landfill Survey Tech Memo Received 12-4-2013. The PSG sampling at Source Area SS37 was designed to potentially target portions of the source area for additional investigation or removal actions. Sampling showed a sporadic distribution of chlorinated compounds throughout the site with the highest concentrations in the northeast section of the site. Petroleum concentrations are centered around one very high mass (near storage tanks and asphalt mixing area) located in south central section of the site, with concentrations dissipating as they move away.
Geophysical surveys were conducted to identify subsurface anomalies, was designed to identify subsurface buried materials, including drums, tanks, or other debris.
|
Kim DeRuyter |
| 1/30/2014 |
Conceptual Site Model Submitted |
The AF submitted Conceptual Site Model Update (Draft) for sites LF03/FT09 and SS37 Received 1/30/14. Due to close proximity of sites and possible plume overlap LF03/FT09 and SS37 are all contained in one report. Soil, ground water, and surface water from Garrison Slough between LF03/FT09 and SS37 were sampled and analyzed for GRO, DRO, VOC, PCE, PCB, TEC and PAH. LF03 /FT09 Sampling shows the DRO plume may be expanding, but does not appear to move offsite and the benzene plume is still present, and may be growing slightly, but appears to not be leeching into surface water. Two VOC plumes and a TCE plume are also present on site, with the VOC plume being roughly twice as large as originally expected. The DRO plume at SS37 is now well-delineated, and the benzene plume is fairly well defined. Through sampling it now appears that no plumes overlap between LF03/FT09 and SS37. |
Anna Iverson |
| 2/11/2014 |
Document, Report, or Work plan Review - other |
2012-Final installation-wide monitoring program (IWMP) report received June, 24 2013. During the 2012 season three monitoring wells were installed. One of these wells replaced historic wells that had been decommissioned and two were installed in new locations. Five wells were sampled, benzene (2 wells) was the only COC (Contaminant of concern) that exceeded the FRG (final remediation goal). Historically, benzene exceeded the FRG in the same two wells. While the benzene concentration in well 37-5 appears to be on a decreasing trend, no clear trend is apparent in well 37-2 and replacement well 37-2B. Note that this is the first time that replacement well 37-2B has been sampled. Petroleum Hydrocarbon- DRO (1 well) was the only detected COPC (Contaminant of potential concern) with levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. Pesticides and arsenic have the potential to impact groundwater at this source area, but were not included in the 2012 monitoring event. No historical plume extents were available. In general, based on the comparison between 2012 and historical concentrations, the groundwater impacts for COCs have decreased. However, residual petroleum impacts, including NAPL, still remain at Source Area SS37. |
Anna Iverson |
| 5/1/2014 |
Document, Report, or Work plan Review - other |
2013-Draft installation-wide monitoring program (IWMP) report received March, 26 2014. During the spring and fall 2013 monitoring events, five of the seven IWMP wells were sampled. Benzene in 2 wells during both spring and fall was the only COC in exceedance of levels above current ROD FRGs. DRO (1 well) was the only detected COPC (Contaminant of potential concern) with levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. The DRO exceedance is also co-located with a benzene exceedance reported in 2013. Petroleum hydrocarbons were detected prior to 2012; however, changed analytical procedures preclude a direct comparison of these concentrations to current standards for GRO and DRO, as well as to GRO and DRO concentrations. |
Anna Iverson |
| 6/10/2015 |
Site Characterization Workplan Approved |
Approval issued for the "Final Workplan for Additional Well Installations, Eielson Air Force Base, Alaska" dated 26 May 2015. The workplan describes the installation of 20 new monitoring wells at ten source areas (i.e. ST10/SS14, ST13/DP26, ST18, ST19, DP44, SS61, SS37, ST58, LF04, and SS534)across Eielson, as well as the redevelopment of drinking water well NWS56WH at Source Area ST56 (Engineer Hill). |
Melinda Brunner |
| 9/22/2015 |
CERCLA RI Plan Approved |
Joint approval issued by EPA and DEC for the final "Remedial Investigation / Feasibility Study Management Plan For Operable Units 3, 4, and 5 Source Areas, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska" dated September 2015 (OU 3, 4 & 5 RI/FS MP). The OU 3, 4 & 5 RI/FS MP describes planned remedial investigations at 23 contaminated sites at Eielson Air Force Base, including SS37. |
Melinda Brunner |
| 9/22/2015 |
CERCLA RI Plan Approved |
DEC and EPA jointly approved the "2015 Annual Field Sampling Plan, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska" dated September 2015 (FSP). The FSP describes remedial investigations planned for 2015 at 21 contaminated sites at Eielson Air Force Base, including SS37. The FSP is meant to be used in conjunction with the appropriate remedial investigation/feasibility study (RI/FS) management plan(i.e. OU 3,4,& 5) and the Programmatic Quality Assurance Project Plan. |
Melinda Brunner |
| 7/22/2016 |
Institutional Control Compliance Review |
DEC and EPA Approved the Final 2016 Installation-Wide Monitoring Program Quality Assurance Project Plan Addendum No. 5. The IWMP QAPP Add. 5 updates the 2012 IWMP QAPP for the 2016 field season. Changes and additions to the existing network of monitoring wells were described. |
Monte Garroutte |
| 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 |
| 7/18/2017 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the Installation-Wide Monitoring Program, 2016 Groundwater Monitoring Report, Eielson Air Force Base, Alaska (June, 2017). |
John O'Brien |
| 8/6/2018 |
CERCLA ROD Periodic Review |
DEC evaluated "Fifth Five-Year Review Report for Eielson Air Force Base, Alaska" draft dated April 2018 and issued comments. |
Bri Clark |
| 8/10/2018 |
Institutional Control Periodic Reporting |
DEC and EPA reviewed the "Installation-Wide Monitoring Program 2017 Groundwater Monitoring Program" for Eielson Air Force Base, Alaska dated March 2018 and issued comments. |
Bri Clark |
| 12/19/2018 |
Document, Report, or Work plan Review - other |
DEC reviewed and issued a secondary round of comments on the, "Draft Final Supplemental Remedial Investigation/Risk Assessment Report for OU3,4,5 Source Areas, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska," dated October 2018. |
Bri Clark |
| 12/19/2018 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Draft Installation-Wide Monitoring Program Quality Assurance Project Plan, Addendum No. 8, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska," dated November 2018. |
Bri Clark |
| 2/13/2019 |
Institutional Control Periodic Reporting |
DEC and EPA approved the Installation-Wide Monitoring Program 2017 Groundwater Monitoring Report, Eielson Air Force Base, Alaska, dated January 2019. |
Bri Clark |
| 3/4/2019 |
Institutional Control Periodic Reporting |
DEC issued comments on the Draft Installation-Wide Monitoring Program 2018 Groundwater Monitoring Report, Eielson Air Force Base, Alaska, dated January 2019. This report describes the groundwater monitoring activities conducted installation-wide in 2018. |
Bri Clark |
| 10/17/2019 |
Document, Report, or Work plan Review - other |
DEC provided a response to the air force responses to DEC comments for the Supplemental Remedial Investigation/Risk Assessment Report for OU3,4,5 Source Areas, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska. A comment resolution meeting was recommended. |
Dennis Shepard |
| 8/11/2020 |
Document, Report, or Work plan Review - other |
DEC received a response to comments and a Final Revision 1 Supplemental Remedial Investigation/Risk Assessment Report for OU- 3,4,5 Source Areas, Eielson Performance Based Remediation, Eielson Air Force Base, Alaska, dated August 2020. This report summarizes remedial investigation (RI)/risk assessment (RA) activities conducted from 2015 through 2018 at Source Areas LF001, LF002, LF003/FT009, LF004, LF006, WP032, WP033, SS036, SS037, DP044, WP045/SS057, DP055, ST056, SS061, and SS064 on Eielson Air Force Base. |
Dennis Shepard |
| 3/1/2021 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 71351 Drums - asphalt mixing area. |
Cascade Galasso-Irish |
| 6/2/2021 |
CERCLA RI Report Approved |
The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) provided joint approval of the Final Supplemental Remedial Investigation/Risk Assessment Report for OU3,4,5 Source Areas, Eielson Air Force Base (May 2021). The report summarizes remedial investigation (RI)/risk assessment (RA) activities conducted from 2015 through 2018 at Source Areas LF001, LF002, LF003/FT009, LF004, LF006, WP032, WP033, SS036, SS037, DP044, WP045/SS057, DP055, ST056, SS061, and SS064 on Eielson Air Force Base. |
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 |
