Site Report: Eielson AFB (CG517) Bldg 2375 AAFES Service Station

Site Name:	Eielson AFB (CG517) Bldg 2375 AAFES Service Station
Address:	; , Eielson AFB, AK 99702
File Number:	107.26.002
Hazard ID:	24320
Status:	Active
Staff:	Axl LeVan, 9074512156 axl.levan@alaska.gov
Latitude:	64.685200
Longitude:	-147.096400
Horizontal Datum:	NAD83

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

Three 10,000-gallon leaded and unleaded gasoline underground storage tanks (USTs) were replaced and 1300 cubic yards of contamination soil were removed in 1992. The replacement tanks are as follows: Tank #13 is a 15,000-gallon gasoline tank, Tank #17 is a 10,000-gallon gasoline tank and Tank #171 is a 5,000-gallon diesel tank. The fueling islands and fuel dispensers were not removed. 1993 soil sampling from the sidewalls of the excavations indicated BTEX up to 449 mg/kg and GRPH up to 12,178 mg/kg. No soil samples were collected from beneath the USTs. 1993 groundwater sampling indicated benzene up to 7.65 mg/L, toluene up to 21.7 mg/L, ethylbenzene up to 1.55 mg/L, xylenes up to 13.08 mg/L and GRPH up to 55.8 mg/L. Monitoring continued through 1997 but was discontinued despite still having benzene above cleanup levels. The three USTs, piping, dispensers and a minimal amount of soil were removed in 2011. As expected, contamination from the historic releases was encountered. Additional contamination from newer releases was discovered. The scope of work for the UST removal contract did not include environmental assessment and so, according to a USAF letter dated August 04, 2011, the required release investigation/corrective action will be conducted as soon as funding can be secured. This site is also known as the BX Service Station. This site is adjacent to SS68/AOC29/AAA Site (ADEC file 107.38.101).

Action Information

Action Date	Action	Description	DEC Staff
3/6/1992	Leaking Underground Storage Tank Release Confirmed - Petroleum	LUST Site created in CSP for source area ID 78090 ADD;	Former Staff
3/6/1992	Site Added to Database		Former Staff
6/1/1992	Underground Storage Tank Site Characterization or Assessment	Site assessment	Former Staff
6/2/1992	Update or Other Action	Kalu denied request to discharge groundwater from BX Service Station to Sewage Treatment Plant because benzene concentration is too high (7.65, 5.66 & 3.94).	Former Staff
6/30/1992	Update or Other Action	Kalu agrees with plans of responsible party to defer concluding detailed site assessment and implementing groundwater monitoring scheme until later this summer. Installation of new tank system will begin immediately.	Former Staff
1/31/1993	Update or Other Action	Kalu met with Brent Koenen, John Hellen and Gibler to discuss E-S workplan for site. Slug tests must be replaced with pump tests. Pump well should have 4" casing. Nearest off-base well is Moose Creek. Analytical results on borehole samples will decide disposal method. Pump well outside plume and WWD still??	Former Staff
2/23/1993	Update or Other Action	Peterson: Sent PRP (potential responsible party) Notification Letter to responsible party 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.	Former Staff
1/15/1994	Leaking Underground Storage Tank Cleanup Initiated - Petroleum	Kalu - Corrective action is underway at this site and has been ongoing since 1992. Awaiting final corrective action plan. The three 10,000-gallon leaded and unleaded gasoline tanks were replaced in 1992.	Former Staff
1/28/2004	Update or Other Action	Transferred DEC staff lead from John Carnahan	Cynthia Pring-Ham
8/5/2005	Update or Other Action	Staff sent an email to Eielson requesting information about this site and the current status of monitoring.	Emily Youcha
8/5/2005	Update or Other Action	Updated GIS coordinates from TOPOZONE, NAD 83.	Emily Youcha
8/23/2006	Update or Other Action	Staff met with Eielson to discuss setting up a compliance monitoring program at this site to monitoring the plume stability. Ground water is contaminated at the site and has not been monitored within the past 10 years. Staff is working with Eielson to set up monitoring program for compliance and LUST sites.	Emily Youcha
6/25/2008	Exposure Tracking Model Ranking	Intitial Ranking Complete for Source Area: 78090 (Autogenerated Action)
11/9/2010	Document, Report, or Work plan Review - other	Received workplan for tank removal and concrete/asphalt demolition. Workplan did not include plans for delineation of historic contamination and stated plan to return all soil, including soil known to be contaminated, to the location from which it is excavated.	Kathleen Beutel
12/2/2010	Update or Other Action	Sent request for comment letter extention for tank removal/demolition workplan.	Kathleen Beutel
12/22/2010	Update or Other Action	This entry contains only site-specific information. An informational site has been added to the database for actions that pertain to Eielson Air Force Base in its entirety. Please see ADEC file number 107.38.006/Hazard ID 25578/Eielson AFB Basewide Information.	Kathleen Beutel
4/22/2011	Document, Report, or Work plan Review - other	Staff reviewed the Revised Work Plan to Demolish Base Service Station Fuel Tanks and Underground Utilities, Phase 2, Building 2375 Eielson Air Force Base, received on April 11, 2011. Soil and groundwater contamination were detected when the Service Station tanks and piping were replaced with new tanks and piping in 1992. One of the previous tanks had held leaded gasoline. Soil will be screened and segregated into clean and contaminated and stockpiles which will be sampled prior to disposal. The revised work plan incorporated analysis of soil samples for PAHs, EDB, DCA, MTBE and lead in addition to the analysis for BTEX, and AK methods listed in the Draft Work Plan. The contractor had planned to sample a floor sump in the service station for AK methods, VOCs and RCRA metals; PAHs and PCBs were added to the list of analytes. The funding programmed for this UST removal is limited, and a release investigation and corrective action plan will be necessary but may be delayed until funding for Compliance Restoration sites is available in 2012.	Kim DeRuyter
6/21/2011	Site Visit	Contaminated sites staff conducted two site visits to observe the AAFES Service Station tank removal. The tanks that are being removed replaced three tanks that were removed in 1992. Smear zone contamination from the previous tanks was anticipated and encountered. Additional soil contamination was discovered as the result of an improperly installed vent pipe. The contract for the tank pull did not include removal of contaminated soil. Staff sent a letter response to the workplan asking that a release investigation (RI) workplan be provided prior to the tank pull so that the RI would follow directly on the tails of the tank pull, but funding for this activity has not yet been released. The site will be fenced until the release investigation and corrective action are completed.	Kim DeRuyter
7/7/2011	Underground Storage Tank Site Characterization or Assessment	Staff issued a letter reminding Air Force personel of the UST regulations which require that a release investigation report be submitted within 45 days of confirmation of a release. During discussions with the Air Force environmental staff and their contractor it became clear that FY12 funds for the release investigation and corrective action had not yet been released.	Kim DeRuyter
8/4/2011	Update or Other Action	Staff received a call from the contractor and a call and letter from the Air Force in response to the July 7, 2011 letter requesting a release investigation report be submitted within 45 days of the discovery of contamination at the AAFES Service Station. The contractor requested an extension, and explained the the contract did not cover an RI, but he would submit a report of his findings during the next two weeks. Eielson environmental staff stated that contracting money had not been allocated for the RI and corrective action, but they would try to find funding from other sources to complete the work; however, money may not be available until next summer. The letter stated that the Air Force understood that RI/CA were required under the UST regulations and requested an extension in order to obtain funding for the work.	Kim DeRuyter
9/9/2011	Update or Other Action	CS staff sent a letter to USAF that acknowledged receipt of the report titled "Site Assessment and Phase 1 Release Investigation Report for UST System Closure - Former Eielson AFB AAFES Station" and noted that, as previously discussed, this report does not meet the requirements of a release investigation (RI)/corrective action per 18 AAC 78.235. As stated in a letter from the USAF dated August 04, 2011, it is anticipated that Eielson will conduct an RI as soon as funding is secured.	Kathleen Beutel
9/9/2011	Interim Removal Action Approved	CS staff approved a work plan to remove additional blacktop and contaminated soil from the location where the tanks were excavated. Soil will be held at Eielson's containment cell until it can be evaluated and disposed of in 2012.	Kathleen Beutel
12/30/2011	Update or Other Action	Staff sent a letter to Eielson requesting the report for the interim removal action that occurred in September/October and a schedule for the overdue release investigation.	Kathleen Beutel
6/13/2012	Site Visit	Contaminated Sites staff conducted a site visit. Field work under the Preliminary Assessment/Site Inspection QAPP was about to begin. CS staff discussed sampling procedures with contractors and drillers.	Kathleen Beutel
4/10/2014	Document, Report, or Work plan Review - other	2014- Draft Multiple Compliance Restoration Program Sites RI Work Plan received March 1, 2014. In 2012, 12 soil and 3 groundwater samples were collected and analyzed for DRO, RRO, GRO, VOC, SVOCs, PCBs and metals. 3 COPCs (Contaminant of potential concern) Benzene, Chromium (total), and Arsenic had levels that exceeded current MCL (Maximum contaminant level) or ADEC soil levels. GRO, DRO, Benzene, Ethylbenzene, Toluene, Xylenes (total), bis (2-Ethylhexyl) phthalate, Arsenic, Lead, and Thallium all exceed cleanup levels in groundwater. Additional field work is expected in the 2014 field season.	Anna Iverson
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
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
8/24/2015	Site Characterization Workplan Approved	DEC approved the "Multiple Compliance Restoration Program Sites Phase II Remedial Investigation/Feasibility Study Work Plan, Eielson Air Force Base, Alaska" dated August 2015. The work plan describes soil and groundwater sampling that will occur at CG517; fieldwork is scheduled to begin in August 2015.	Melinda Brunner
10/28/2016	Update or Other Action	DEC acknowledged receipt of the Draft Multiple Compliance Restoration Program Sites Interim Activities Report, Eielson Air Force Base, Alaska (July, 2016). DEC did not provide comments on the Interim Report and is reserving review and comments for the completed characterization reports.	John O'Brien
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
12/14/2016	Meeting or Teleconference Held	DEC and the Air Force discussed plans for site characterization in 2017 and reviewed data from the 2016 field effort.	Monte Garroutte
12/16/2016	Document, Report, or Work plan Review - other	DEC completed review of the 2014 "Site Characterization Report, Various Sites - Data Quality Assessment" and resolved all comments.	Monte Garroutte
11/1/2017	Document, Report, or Work plan Review - other	DEC reviewed and provided comments on the Draft 2016 CG517 Site Characterization Report, Eielson Air Force Base, Alaska (September, 2017).	John O'Brien
11/30/2017	Document, Report, or Work plan Review - other	DEC completed review of the CG517 SC report	Monte Garroutte
8/14/2018	Update or Other Action	DEC reviewed and approved "Final Decision Document, Source Area CG517, Eielson Air Force Base, Alaska," dated July 2018. The selected remedy to address contaminants of concern at CG517 is the excavation of affected soil and monitored natural attenuation for affected groundwater.	Bri Clark
9/18/2018	CERCLA Remedial Design/Remedial Action Plan Approved	DEC approved the Final Work Plan for Removal Action and Monitoring at Source Areas CG517 and CS081, Eielson Air Force Base, Alaska, dated August 2018.	Bri Clark
4/26/2019	Cleanup Level(s) Approved	The Alaska Department of Environmental Conservation (DEC) completed a review of the Final Decision Document Source Area CG517 Eielson Air Force Base, Alaska, dated March 2019. The document provides cleanup level changes made to the decision document (dated July 2018). All cleanup levels have been accurately revised to match the 2018 DEC cleanup levels and the document is approved.	Dennis Shepard
5/9/2019	Document, Report, or Work plan Review - other	DEC provided comments on the Draft Remedial Action Report, Removal Action and Monitoring at Source Areas CG517 and CS081, Eielson Air Force Base, Alaska dated April 2019. The report describes the site activities that were performed to complete Remedial Action for sites CG517 and CS081.	Bri Clark
7/1/2019	Document, Report, or Work plan Review - other	DEC provided approval for the Remedial Action Report, Removal Action and Monitoring at Source Areas CG517 and CS081, Eielson Air Force Base, Alaska, June 2019.	Dennis Shepard
3/14/2022	Document, Report, or Work plan Review - other	DEC provided review comments for the Draft Uniform Federal Policy – Quality Assurance Project Plan (UFP-QAPP), Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (February 2022). The UFP-QAPP details the remedial excavation services to be performed at Eielson Air Force Base (AFB) sites TU077, SS079, CG517, and ZZ088. Remedial excavation is proposed at sites TU077, SS079, and CG517 to remove up to 6,500 cubic yards (cy) of POL-contaminated soil in the vadose zone in order to eliminate the potential exposure concerns to human health and the environment. Remedial excavation is proposed at site ZZ088 to remove up to 350 cy of lead contaminated soil, as well as encapsulate the former communications building frame with a concrete cap.	Dennis Shepard
5/16/2022	Document, Report, or Work plan Review - other	DEC provided backcheck review comments for the Draft Final Uniform Federal Policy – Quality Assurance Project Plan, Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (April 2022). Some remaining clarification is needed for the Air Force responses.	Dennis Shepard
6/3/2022	Document, Report, or Work plan Review - other	DEC provided approval for the Final Uniform Federal Policy – Quality Assurance Project Plan, Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (May 2022).Remedial excavation is proposed at sites TU077, SS079, and CG517 to remove up to 6,500 cubic yards (cy) of POL-contaminated soil in the vadose zone in order to eliminate the potential exposure concerns to human health and the environment. Remedial excavation is proposed at site ZZ088 to remove up to 350 cy of lead contaminated soil, as well as encapsulate the former communications building frame with a concrete cap.	Dennis Shepard
5/10/2023	Offsite Soil or Groundwater Disposal Approved	DEC reviewed and signed a Contaminated Soil Transport and Treatment Approval Form for disposal of 195 cubic yards of PFAS contaminated soil from the TU077 and CG517 removal actions to a RCRA facility.	Axl LeVan
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
4/16/2024	Document, Report, or Work plan Review - other	DEC reviewed the "Draft 2024 Remedial Action Report for Remedial Action – Construction at Multiple Sites: CG517, SS079, TU077 and ZZ088, Eielson Air Force Base, Alaska, March 2024". The report outlines the excavation and removals performed at the four sites and the installation of monitoring wells.	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
7/11/2024	CERCLA Removal Action Report	DEC reviewed and approved the "Final 2024 Remedial Action Report for Remedial Action – Construction at Multiple Sites: CG517, SS079, TU077 and ZZ088, Eielson Air Force Base, Alaska, May 2024" based on response to DEC comments on the draft document. The report outlines the excavation of contaminated material at the four sites and the installation of groundwater monitoring wells for continued monitoring at the three of the sites.	Axl LeVan

Action Date

Action

Description

DEC Staff

3/6/1992

Leaking Underground Storage Tank Release Confirmed - Petroleum

LUST Site created in CSP for source area ID 78090 ADD;

Former Staff

3/6/1992

Site Added to Database

Former Staff

6/1/1992

Underground Storage Tank Site Characterization or Assessment

Site assessment

Former Staff

6/2/1992

Update or Other Action

Kalu denied request to discharge groundwater from BX Service Station to Sewage Treatment Plant because benzene concentration is too high (7.65, 5.66 & 3.94).

Former Staff

6/30/1992

Update or Other Action

Kalu agrees with plans of responsible party to defer concluding detailed site assessment and implementing groundwater monitoring scheme until later this summer. Installation of new tank system will begin immediately.

Former Staff

1/31/1993

Update or Other Action

Kalu met with Brent Koenen, John Hellen and Gibler to discuss E-S workplan for site. Slug tests must be replaced with pump tests. Pump well should have 4" casing. Nearest off-base well is Moose Creek. Analytical results on borehole samples will decide disposal method. Pump well outside plume and WWD still??

Former Staff

2/23/1993

Update or Other Action

Peterson: Sent PRP (potential responsible party) Notification Letter to responsible party 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.

Former Staff

1/15/1994

Leaking Underground Storage Tank Cleanup Initiated - Petroleum

Kalu - Corrective action is underway at this site and has been ongoing since 1992. Awaiting final corrective action plan. The three 10,000-gallon leaded and unleaded gasoline tanks were replaced in 1992.

Former Staff

1/28/2004

Update or Other Action

Transferred DEC staff lead from John Carnahan

Cynthia Pring-Ham

8/5/2005

Update or Other Action

Staff sent an email to Eielson requesting information about this site and the current status of monitoring.

Emily Youcha

8/5/2005

Update or Other Action

Updated GIS coordinates from TOPOZONE, NAD 83.

Emily Youcha

8/23/2006

Update or Other Action

Staff met with Eielson to discuss setting up a compliance monitoring program at this site to monitoring the plume stability. Ground water is contaminated at the site and has not been monitored within the past 10 years. Staff is working with Eielson to set up monitoring program for compliance and LUST sites.

Emily Youcha

6/25/2008

Exposure Tracking Model Ranking

Intitial Ranking Complete for Source Area: 78090 (Autogenerated Action)

11/9/2010

Document, Report, or Work plan Review - other

Received workplan for tank removal and concrete/asphalt demolition. Workplan did not include plans for delineation of historic contamination and stated plan to return all soil, including soil known to be contaminated, to the location from which it is excavated.

Kathleen Beutel

12/2/2010

Update or Other Action

Sent request for comment letter extention for tank removal/demolition workplan.

Kathleen Beutel

12/22/2010

Update or Other Action

This entry contains only site-specific information. An informational site has been added to the database for actions that pertain to Eielson Air Force Base in its entirety. Please see ADEC file number 107.38.006/Hazard ID 25578/Eielson AFB Basewide Information.

Kathleen Beutel

4/22/2011

Document, Report, or Work plan Review - other

Staff reviewed the Revised Work Plan to Demolish Base Service Station Fuel Tanks and Underground Utilities, Phase 2, Building 2375 Eielson Air Force Base, received on April 11, 2011. Soil and groundwater contamination were detected when the Service Station tanks and piping were replaced with new tanks and piping in 1992. One of the previous tanks had held leaded gasoline. Soil will be screened and segregated into clean and contaminated and stockpiles which will be sampled prior to disposal. The revised work plan incorporated analysis of soil samples for PAHs, EDB, DCA, MTBE and lead in addition to the analysis for BTEX, and AK methods listed in the Draft Work Plan. The contractor had planned to sample a floor sump in the service station for AK methods, VOCs and RCRA metals; PAHs and PCBs were added to the list of analytes. The funding programmed for this UST removal is limited, and a release investigation and corrective action plan will be necessary but may be delayed until funding for Compliance Restoration sites is available in 2012.

Kim DeRuyter

6/21/2011

Site Visit

Contaminated sites staff conducted two site visits to observe the AAFES Service Station tank removal. The tanks that are being removed replaced three tanks that were removed in 1992. Smear zone contamination from the previous tanks was anticipated and encountered. Additional soil contamination was discovered as the result of an improperly installed vent pipe. The contract for the tank pull did not include removal of contaminated soil. Staff sent a letter response to the workplan asking that a release investigation (RI) workplan be provided prior to the tank pull so that the RI would follow directly on the tails of the tank pull, but funding for this activity has not yet been released. The site will be fenced until the release investigation and corrective action are completed.

Kim DeRuyter

7/7/2011

Underground Storage Tank Site Characterization or Assessment

Staff issued a letter reminding Air Force personel of the UST regulations which require that a release investigation report be submitted within 45 days of confirmation of a release. During discussions with the Air Force environmental staff and their contractor it became clear that FY12 funds for the release investigation and corrective action had not yet been released.

Kim DeRuyter

8/4/2011

Update or Other Action

Staff received a call from the contractor and a call and letter from the Air Force in response to the July 7, 2011 letter requesting a release investigation report be submitted within 45 days of the discovery of contamination at the AAFES Service Station. The contractor requested an extension, and explained the the contract did not cover an RI, but he would submit a report of his findings during the next two weeks. Eielson environmental staff stated that contracting money had not been allocated for the RI and corrective action, but they would try to find funding from other sources to complete the work; however, money may not be available until next summer. The letter stated that the Air Force understood that RI/CA were required under the UST regulations and requested an extension in order to obtain funding for the work.

Kim DeRuyter

9/9/2011

Update or Other Action

CS staff sent a letter to USAF that acknowledged receipt of the report titled "Site Assessment and Phase 1 Release Investigation Report for UST System Closure - Former Eielson AFB AAFES Station" and noted that, as previously discussed, this report does not meet the requirements of a release investigation (RI)/corrective action per 18 AAC 78.235. As stated in a letter from the USAF dated August 04, 2011, it is anticipated that Eielson will conduct an RI as soon as funding is secured.

Kathleen Beutel

9/9/2011

Interim Removal Action Approved

CS staff approved a work plan to remove additional blacktop and contaminated soil from the location where the tanks were excavated. Soil will be held at Eielson's containment cell until it can be evaluated and disposed of in 2012.

Kathleen Beutel

12/30/2011

Update or Other Action

Staff sent a letter to Eielson requesting the report for the interim removal action that occurred in September/October and a schedule for the overdue release investigation.

Kathleen Beutel

6/13/2012

Site Visit

Contaminated Sites staff conducted a site visit. Field work under the Preliminary Assessment/Site Inspection QAPP was about to begin. CS staff discussed sampling procedures with contractors and drillers.

Kathleen Beutel

4/10/2014

Document, Report, or Work plan Review - other

2014- Draft Multiple Compliance Restoration Program Sites RI Work Plan received March 1, 2014. In 2012, 12 soil and 3 groundwater samples were collected and analyzed for DRO, RRO, GRO, VOC, SVOCs, PCBs and metals. 3 COPCs (Contaminant of potential concern) Benzene, Chromium (total), and Arsenic had levels that exceeded current MCL (Maximum contaminant level) or ADEC soil levels. GRO, DRO, Benzene, Ethylbenzene, Toluene, Xylenes (total), bis (2-Ethylhexyl) phthalate, Arsenic, Lead, and Thallium all exceed cleanup levels in groundwater. Additional field work is expected in the 2014 field season.

Anna Iverson

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

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

8/24/2015

Site Characterization Workplan Approved

DEC approved the "Multiple Compliance Restoration Program Sites Phase II Remedial Investigation/Feasibility Study Work Plan, Eielson Air Force Base, Alaska" dated August 2015. The work plan describes soil and groundwater sampling that will occur at CG517; fieldwork is scheduled to begin in August 2015.

Melinda Brunner

10/28/2016

Update or Other Action

DEC acknowledged receipt of the Draft Multiple Compliance Restoration Program Sites Interim Activities Report, Eielson Air Force Base, Alaska (July, 2016). DEC did not provide comments on the Interim Report and is reserving review and comments for the completed characterization reports.

John O'Brien

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

12/14/2016

Meeting or Teleconference Held

DEC and the Air Force discussed plans for site characterization in 2017 and reviewed data from the 2016 field effort.

Monte Garroutte

12/16/2016

Document, Report, or Work plan Review - other

DEC completed review of the 2014 "Site Characterization Report, Various Sites - Data Quality Assessment" and resolved all comments.

Monte Garroutte

11/1/2017

Document, Report, or Work plan Review - other

DEC reviewed and provided comments on the Draft 2016 CG517 Site Characterization Report, Eielson Air Force Base, Alaska (September, 2017).

John O'Brien

11/30/2017

Document, Report, or Work plan Review - other

DEC completed review of the CG517 SC report

Monte Garroutte

8/14/2018

Update or Other Action

DEC reviewed and approved "Final Decision Document, Source Area CG517, Eielson Air Force Base, Alaska," dated July 2018. The selected remedy to address contaminants of concern at CG517 is the excavation of affected soil and monitored natural attenuation for affected groundwater.

Bri Clark

9/18/2018

CERCLA Remedial Design/Remedial Action Plan Approved

DEC approved the Final Work Plan for Removal Action and Monitoring at Source Areas CG517 and CS081, Eielson Air Force Base, Alaska, dated August 2018.

Bri Clark

4/26/2019

Cleanup Level(s) Approved

The Alaska Department of Environmental Conservation (DEC) completed a review of the Final Decision Document Source Area CG517 Eielson Air Force Base, Alaska, dated March 2019. The document provides cleanup level changes made to the decision document (dated July 2018). All cleanup levels have been accurately revised to match the 2018 DEC cleanup levels and the document is approved.

Dennis Shepard

5/9/2019

Document, Report, or Work plan Review - other

DEC provided comments on the Draft Remedial Action Report, Removal Action and Monitoring at Source Areas CG517 and CS081, Eielson Air Force Base, Alaska dated April 2019. The report describes the site activities that were performed to complete Remedial Action for sites CG517 and CS081.

Bri Clark

7/1/2019

Document, Report, or Work plan Review - other

DEC provided approval for the Remedial Action Report, Removal Action and Monitoring at Source Areas CG517 and CS081, Eielson Air Force Base, Alaska, June 2019.

Dennis Shepard

3/14/2022

Document, Report, or Work plan Review - other

DEC provided review comments for the Draft Uniform Federal Policy – Quality Assurance Project Plan (UFP-QAPP), Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (February 2022). The UFP-QAPP details the remedial excavation services to be performed at Eielson Air Force Base (AFB) sites TU077, SS079, CG517, and ZZ088. Remedial excavation is proposed at sites TU077, SS079, and CG517 to remove up to 6,500 cubic yards (cy) of POL-contaminated soil in the vadose zone in order to eliminate the potential exposure concerns to human health and the environment. Remedial excavation is proposed at site ZZ088 to remove up to 350 cy of lead contaminated soil, as well as encapsulate the former communications building frame with a concrete cap.

Dennis Shepard

5/16/2022

Document, Report, or Work plan Review - other

DEC provided backcheck review comments for the Draft Final Uniform Federal Policy – Quality Assurance Project Plan, Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (April 2022). Some remaining clarification is needed for the Air Force responses.

Dennis Shepard

6/3/2022

Document, Report, or Work plan Review - other

DEC provided approval for the Final Uniform Federal Policy – Quality Assurance Project Plan, Environmental Construction and Services, Remedial Action – Construction at Multiple sites: TU077, SS079, CG517 and ZZ088, Eielson Air Force Base, Alaska (May 2022).Remedial excavation is proposed at sites TU077, SS079, and CG517 to remove up to 6,500 cubic yards (cy) of POL-contaminated soil in the vadose zone in order to eliminate the potential exposure concerns to human health and the environment. Remedial excavation is proposed at site ZZ088 to remove up to 350 cy of lead contaminated soil, as well as encapsulate the former communications building frame with a concrete cap.

Dennis Shepard

5/10/2023

Offsite Soil or Groundwater Disposal Approved

DEC reviewed and signed a Contaminated Soil Transport and Treatment Approval Form for disposal of 195 cubic yards of PFAS contaminated soil from the TU077 and CG517 removal actions to a RCRA facility.

Axl LeVan

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

4/16/2024

Document, Report, or Work plan Review - other

DEC reviewed the "Draft 2024 Remedial Action Report for Remedial Action – Construction at Multiple Sites: CG517, SS079, TU077 and ZZ088, Eielson Air Force Base, Alaska, March 2024". The report outlines the excavation and removals performed at the four sites and the installation of monitoring wells.

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

7/11/2024

CERCLA Removal Action Report

DEC reviewed and approved the "Final 2024 Remedial Action Report for Remedial Action – Construction at Multiple Sites: CG517, SS079, TU077 and ZZ088, Eielson Air Force Base, Alaska, May 2024" based on response to DEC comments on the draft document. The report outlines the excavation of contaminated material at the four sites and the installation of groundwater monitoring wells for continued monitoring at the three of the sites.

Axl LeVan

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

Final Work Plan for Removal Action and Monitoring at Source Areas CG517 and CS081

No associated sites were found.

Missing Location Data

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Site Report: Eielson AFB (CG517) Bldg 2375 AAFES Service Station

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Final Work Plan for Removal Action and Monitoring at Source Areas CG517 and CS081

Missing Location Data

State of Alaska Department of Environmental Conservation