| Action Date |
Action |
Description |
DEC Staff |
| 1/15/1992 |
Site Added to Database |
This site is included in the state EPA Eielson FFA 100.38.011. |
Former Staff |
| 7/23/1992 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Draft remedial investigation and baseline risk assessment received. |
Former Staff |
| 8/20/1992 |
Update or Other Action |
(Old R:Base Action Code = CORR - Correspondence (General)). 20 day extension requested. |
Former Staff |
| 9/16/1992 |
Meeting or Teleconference Held |
Conference call regarding Draft RI between Project Manager. |
Former Staff |
| 9/30/1992 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Response sent regarding remedial investigation and baseline risk assessment. |
Former Staff |
| 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 |
| 5/6/1993 |
Update or Other Action |
(Old R:Base Action Code = RI - Remedial Investigation). Received draft RI from EAFB. The 3 volume document contains the RI and also includes Feasibility study and 02 appendices. |
Former Staff |
| 5/6/1993 |
Site Characterization Report Approved |
(Old R:Base Action Code = FS - Feasibility Study (General)). Received draft FS from EAFB. The 3 volume document contains the FS and also includes Remedial Investigation and 02 appendices. |
Former Staff |
| 10/19/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 9/30/1994 |
Institutional Control Record Established |
When the OU-2 ROD was signed in 1994, it established institutional controls for this site. These ICs include: a prohibition on the installation or use of drinking water wells, a requirement that all monitoring wells are secured with locks, any activity that may result in exposure to contam. g.w. or moving contam. g.w. requires approval of CES/CEV, any activity disturbing a remedial action requires approval of CES/CEV, any activity that may result in exposure to or removal of contam. soil requires approval of CES/CEV, if contam soil or g.w.. are removed from the source, they must be disposed of or treated in accordance with regulation, and a requirement to notify ADEC and EPA of any proposal to change the existing land use or land use controls at the site. |
Ann Farris |
| 8/1/1996 |
Update or Other Action |
Work Plan for Utilidor Investigation/Treatability Study, Contract Number DACA85-94-D-0011, Delivery Order Number 0009, Submittal 001-Draft, 8/16/1996. |
Kalu Kalu |
| 8/1/1996 |
Update or Other Action |
(Old R:Base Action Code = RD - Remedial Design). Amendment 002, Site Health and Safety Plan, Remedial Design for OU-2, Sites ST10/SS14 and ST13/DP26, Utilidor Investigation/Treatability Study, Contract DACA85-94-D0011, Delivery Orders 0007 and 0009, received 8/16/1996. |
Kalu Kalu |
| 9/24/1996 |
Record of Decision |
Final Site-Wide Record of Decision, September 1, 1996, Environmental Restoration Program. |
Rielle Markey |
| 3/24/1997 |
Update or Other Action |
Site updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 10/19/95. |
S&W |
| 8/30/1998 |
Update or Other Action |
From the 1998 RA Report, there was evidence of fuel in the soil and groundwater. The selected remedy was removal of the sources (USTs, drywell and cesspools) and monitor groundwater for 5 years. |
Ann Farris |
| 12/26/2001 |
GIS Position Updated |
Worked with Heather Goldman obtaining GIS latitude and longitude from 1:63,300 topographic map. |
Heather Goldman |
| 1/21/2003 |
Update or Other Action |
The 5-year review is scheduled in 2003 to evaluate the long-term monitoring trends. |
Ann Farris |
| 9/19/2003 |
Meeting or Teleconference Held |
Staff attended a meeting with Air Force and EPA personnel to resolve comments on the draft Eielson Five-Year Review. Issues with the document included event-driven groundwater sampling at several contaminated sites, which we denied pending further clarification of the process, and closing numerous sites under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), but keeping them open under the State until 18 AAC 75 diesel range organic cleanup levels are met. |
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. |
Torsten Ernst |
| 6/21/2005 |
Update or Other Action |
Site remains open under 18 AAC 75 due to remaining ground-water contamination. |
Emily Youcha |
| 8/9/2005 |
Update or Other Action |
ADEC has reviewed the historical information for ST18 and Buildings 3405, 3409, and 3411, which is in the ADEC LUST Program Database (RECKEY No. 199031X015901). This site consists of two 25,000 gallon regulated diesel tanks that were installed in 1948 and were used to supply three emergency standby generator buildings until 1993. In September 1994, the tanks were removed and the site assessment was performed. The bottom of the tanks was at 12.5 feet below ground surface, on top of concrete ballasts that were left in place when the tanks were excavated. Approximately 850 cubic yards of soil was removed from the site, of which 75 cubic yards were considered highly contaminated with petroleum. The bottom of the excavation revealed up to 1,445 ppm diesel range organics (DRO) and 559 ppm gasoline range organics (GRO). It was thought that the presence of GRO might indicate some contamination associated with waste oil that was not associated with these tanks.
Since the tanks are listed in the ADEC Contaminated Sites Program Database as ST18 – Old Boiler Plant (File No. 107.38.084, RECKEY No. 198731X108319) the entry in the LUST database will be closed. The contamination associated with ST18 consists of the same two 25,000 gallon diesel tanks and also includes a drywell. Site ST18 was closed under Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) as documented in Operable Unit Two Record of Decision (ROD) signed in 1994 and the Five-Year ROD Review in 2003. Since the former LUST is covered under the Installation Restoration Program (as ST18) and the ADEC Contaminated Sites Program, the site will be closed in the LUST Program. However, the site still remains open in the ADEC Contaminated Sites Program due to remaining petroleum contamination associated with site ST18. In order to close out site ST18 with the Contaminated Sites Program, confirmation sampling should occur as under 18 AAC 75 to determine whether petroleum-contaminated ground water remains. |
Emily Youcha |
| 1/30/2006 |
Update or Other Action |
Upon review of the OU2 remedial action summary report dated August 1998, the Air Force indicated that DRO and GRO were detected above DEC cleanup levels and an agreement between the DEC and the Air Force allowed the DRO contaminated soil to be left in place (no reference was cited regarding the agreement). The Air Force also indicated that additional sampling would take place in 2002 to determine if DRO and GRO concentrations were declining. This sampling did not occur. |
Emily Youcha |
| 3/1/2006 |
Update or Other Action |
Staff had a telephone call with Eielson AFB to discuss their long-term monitoring program optimization. Eielson would like to apply "event-driven monitoring" to many benzene-contaminated sites, where monitoring would occur when the concentration reached the MCL at a predicted time. They are using MAKSENS to do the statistical regressions and come up with a slope indicating benzene degradation rates. This slope would predict when the concentrations would reach the MCL and monitoring would occur at that time only. They would like to apply this slope to other "similar sites" to predict when the concentrations would reach the MCL. Eielson submitted the concept to AFCEE for review, but apparently AFCEE requested more data, which Eielson did not have. At this point, DEC has not reviewed any data on this concept and requested Eielson submit a report showing the data and justification of their assumptions. |
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 |
| 5/6/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
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 |
| 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, a total of 30 PSG samplers were installed and sampled. Through PSG the total volatile organic compounds found consisted primarily of fuel-related compounds (TPH, naphthalene, and BTEX), with the highest measured mass located in the northeast portion of the source area. In general, TVOC concentrations are considered low, with two areas of slightly elevated mass measured at the southeast corner of Building 3409 and at the southwest corner of Building 3411. Two new monitoring wells were installed to replace historic wells that had been decommissioned. NO COCs (contaminates of concerns) or COPC (Contaminant of potential concern) were detected at concentrations exceeding the FRGs (final remediation goal). Analytical results from future groundwater monitoring events will be used to further confirm that COCs are likely not present at concentrations greater than FRGs. |
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 2013 monitoring season 2 wells were scheduled to be sampled during the fall and spring season, but due to frozen ground only 1 well was sampled in the spring. No COCs exceeded ROD FRGs, and only 1 COPCs exceeded exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels, DRO was above levels in 1 well in the Fall, but this well was not sampled in the spring season due to freezing ground. Due to limited sampling contaminate trends could not be established, overall, it does appear like concentrations appear to be decreasing. |
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 |
| 3/26/2016 |
Update or Other Action |
DEC and EPA reviewed the "Draft Remedial Investigation/Feasibility Study Management Plan for Operable Unit 2 Source Areas, Eielson Air Force Base, Alaska" dated February 2016 (OU2 RI/FS MP) and provided joint comments to the U.S. Air Force. The RI/FS MP provides an overview of the activities associated with the investigation and evaluation of the 27 source areas at Eielson Air Force Base. ST018 is included in the RI/FS MP. |
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 |
| 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 |
| 12/23/2016 |
Document, Report, or Work plan Review - other |
DEC and EPA approved the OU2 RI/FS Management Plan. The RI/FS MP provides an overview of the activities associated with the investigation and evaluation of the 27 source areas (not including Garrison Slough) contained in the ROD that includes seven source areas in OU2 and 21 source areas outside of OU2.
|
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 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 |
| 8/23/2019 |
Site Characterization Report Approved |
DEC provided approval for the Final Site Characterization Report II, Source areas ST010/SS014, SS012, ST013/DP026, ST015, ST016, ST018, ST019, ST020, WP038, SS039/SS063, SS047, ST048, SS050, SS051, SS052, SS053, AND DP054, Eielson Performance Based Remediation, Eielson AFB, Alaska, June 2019. Fuels and fuel-related VOCs and PAHs are proposed as COCs at Source Area ST018. |
Dennis Shepard |
| 9/20/2022 |
Document, Report, or Work plan Review - other |
The U.S. Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) approved the Final 2021 Institutional Controls/Land Use Controls Annual Report, Eielson Air Force Base, Alaska (dated September 2022). The report provides inspection findings and reviews individual ICs established by the record of decision (ROD) documents for Installation Restoration Program source areas with enforceable ICs, as well as other contaminated sites currently with LUCs in effect. |
Dennis Shepard |
| 11/1/2022 |
Document, Report, or Work plan Review - other |
DEC provided review comments for the Draft Supplemental Remedial Investigation (RI) Work Plan (WP) Addendum, Eielson Air Force Base, Alaska, September 2022. The Supplemental RI Work Plan Addendum is prepared with the intention of providing a detailed approach to support the objectives of characterizing contamination in general accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and applicable state laws at 29 source areas within Operable Unit (OU) 1, OU2, OU4, and OU6 at Eielson AFB. This supplemental work plan addendum complements the primary planning documents Final Supplemental Remedial Investigation Work Plan Eielson Air Force Base, Alaska (September 2022) (Gaps 1 Work Plan) and the Risk Assessment Work Plan (USAF 2016). |
Dennis Shepard |
