| Action Date |
Action |
Description |
DEC Staff |
| 1/17/1992 |
Site Added to Database |
This site is included in the state EPA Eielson FFA 100.38.011. |
Former Staff |
| 7/15/1992 |
Update or Other Action |
The soil gas BTEX analyses should be rechecked because concentration level measured below 0.01ppm are inconsistent with the observation of free fuel product in this region. Free product in groundwater extending 300 feet Northwards of Alert Hanger. Soil contamination is unconfirmed. |
Marcus Ortelee |
| 8/21/1992 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Met with Eielson (Sam Gibboney), regarding ARARS for OU1B. Record of Decision. |
Rielle Markey |
| 8/24/1992 |
Update or Other Action |
(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Reviewed workplan for removal of NAPL. EA document. |
Rielle Markey |
| 8/25/1992 |
Meeting or Teleconference Held |
Discussed additional activities in conference call - more product probes to determine extent of floating product. |
Rielle Markey |
| 9/2/1992 |
Meeting or Teleconference Held |
Meeting by RPMs for discussion of ARARs. |
Former Staff |
| 9/25/1992 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). State signatures on ROD for removal of floating product as an interim action. |
Former Staff |
| 11/12/1992 |
Update or Other Action |
(Old R:Base Action Code = CORR - Correspondence (General)). 2 hour call - 1st scoping of OU1 Draft RI to be continued 11-18. |
Rielle Markey |
| 11/17/1992 |
Meeting or Teleconference Held |
2 hour conference call resolving ROD alternatives workplan and remedial action workplan dates and issues. |
Rielle Markey |
| 11/18/1992 |
Meeting or Teleconference Held |
2 hour conference call resolving scoping issues for OU1 Management Plan due 1-15-93. |
Rielle Markey |
| 11/20/1992 |
Update or Other Action |
(Old R:Base Action Code = CORR - Correspondence (General)). Letter sent initiating dispute on site 48 for dates of RD and R action Plan. |
Rielle Markey |
| 12/7/1992 |
Meeting or Teleconference Held |
(Old R:Base Action Code = PUBP - Public Participation)). Public meeting at NP High School 7-9 PM. |
Former Staff |
| 12/7/1992 |
Meeting or Teleconference Held |
(Old R:Base Action Code = PUBP - Public Participation)). Technical Review committee meeting. |
Former Staff |
| 2/10/1993 |
Interim Removal Action Approved |
(Old R:Base Action Code = RD - Remedial Design). Received 60% Design document for NAPL Recovery Project to satisfy interim action 1B. |
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 |
| 3/19/1993 |
Update or Other Action |
(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Sent review comments on 60% Design for OU-1B NAPL Recovery Project Decision Document. |
Rielle Markey |
| 3/23/1993 |
Site Characterization Workplan Approved |
(Old R:Base Action Code = MP - Management Plan (CERCLIS)). Received Schedule for OU-1. Will discuss in a conference call on 3-24. |
Rielle Markey |
| 10/18/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 9/30/1994 |
Institutional Control Record Established |
When the OU-1 ROD was signed, 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 |
| 9/24/1996 |
Record of Decision |
Final Site-Wide Record of Decision, September 1, 1996, Environmental Restoration Program (QTRLOG). |
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 |
| 12/3/2001 |
Long Term Monitoring Established |
The remedy for the site identified in the OU-1 ROD was long-term monitoring. Monitoring is ongoing. |
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 |
Five - year review is scheduled for 2003. Long-term monitoring program will be reevaluated to determine if site is clean or needs additional work. |
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 |
| 6/21/2005 |
Update or Other Action |
This site remains open under 18 AAC 75 due to remaining petroleum contamination in the ground water. Site is closed under CERCLA. Monitoring is no longer ongoing because BTEX concentrations are below cleanup levels. In order to close site under 18 AAC 75, confirmation sampling for DRO/GRO/RRO must be done. |
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 |
| 5/7/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Deborah Williams |
| 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 |
| 5/7/2013 |
Site Visit |
Conducted a site visit in preparation for the Five Year Review. Site is inactive, within the Air Field fence, requires permission to obtain access. One flush mount and two above grade monitoring wells were located. An area of soil staining ~5" in diameter was noted at the fill pipe to the UST on the SW side of the building. The AF RPM said they would notify Larry Lawreth for soil cleanup and consultation with the fuel delivery personnel. |
Kim DeRuyter |
| 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, 5 new wells were installed at the source area to replace historic monitoring wells. There was no detected COCs (Contaminant of concern) in any of the sampled wells. Two COPC (Contaminant of potential concern) DRO (Diesel-range organics) and Trichloroethene (Volatile organic compound) were detected in one well 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 known groundwater contaminant plume has been identified at this site. |
Anna Iverson |
| 5/1/2014 |
Document, Report, or Work plan Review - other |
2013-Draft installation-wide monitoring program (IWMP) report received March, 26 2014. There are 5 monitoring wells located across the site with 3 sampled in spring (2 still had frozen ground) and 5 sampled in fall. BTES, GRO/DRO/RRO, VOCS, EDB, PAHS, TOC, and lead concentrations were all analyzed. There was no detected COCs (Contaminant of concern), 2 COPCs (Contaminant of potential concern) DRO and TCE (same well) had levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. Benzene, a COC at the site shows an overall decreasing trend. However additional groundwater monitoring is need to verify this trend. DRO and TCE have both historically been sampled at the site, but all wells that had spikes in the past were under detection layer. The current well with exceedances was used as a product recovery well until 2012, so little historical data is available at the well. |
Anna Iverson |
| 5/21/2015 |
Site Characterization Workplan Approved |
DEC and EPA jointly approved the "2015 Installation-Wide Monitoring Program Quality Assurance Project Plan, Addendum No. 4, Eielson Air Force Base, Alaska (Final)" dated May 2015. Activities described in the plan include sampling five monitoring wells at ST49 to gauge whether/how the concentration and lateral extent of the known diesel range organics plume has changed. The monitoring wells at this site shall be sampled twice in 2015, Spring and Fall, as part of the Installation-Wide Monitoring Program. |
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 |
| 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 |
| 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 |
| 8/2/2018 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Draft Remedial Investigation/Risk Assessment Report for OU1 Source Area ST049, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska," dated May 2018. |
Bri Clark |
| 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 |
| 11/22/2019 |
Institutional Control Periodic Reporting |
DEC and EPA approved the "Installation-Wide Monitoring Program 2018 Groundwater Monitoring Report, Eielson Air Force Base, Alaska," dated September 2019. |
Sara Marshall |
| 3/5/2021 |
CERCLA RI Report Approved |
The U.S. EPA and the DEC approved the Final Revision 2, Remedial Investigation/Risk
Assessment Report for OU1 Source Area ST049, Eielson Air Force Base (January 2021). This report is focused on investigations at ST049, of OU1.
OU1 Source Areas ST020, ST048, SS050,
SS051, SS052, SS053, and DP054 will be presented separately in a supplemental Remedial Investigation. |
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 |
