Site Report: Eielson AFB (OU-3) (DP044) Battery Shop

Site Name:	Eielson AFB (OU-3) (DP044) Battery Shop
Address:	Near Building 1140, Eielson AFB, AK 99702
File Number:	107.38.021
Hazard ID:	382
Status:	Active
Staff:	Axl LeVan, 9074512156 axl.levan@alaska.gov
Latitude:	64.678048
Longitude:	-147.098609
Horizontal Datum:	NAD27

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

Battery shop (bldg 1141), avionics maintenance facility (bldg 1138), aircraft hangar (bldg 1140), maintenance shops and storage for flightline vehicles (bldgs 1132, 1133, 1134, 1135, and 1136) solvents possibly drained to leach fields. The site is assigned a HIGH overall risk on the Air Force Relative Risk Evaluation Worksheet dated 10/23/95. Potential Sources of Contamination • Buildings 1141 and 1138 may have discharged wastewater into a leach field system, although confirmation of the existence or location of the leach field has not been confirmed. Reportedly dye studies have been conducted to determine direction of drainage associated with the leach field. Records search of historic building plans have been conducted in an attempt to locate or document the existence of the leach field. Records search revealed the sanitary sewer discharge location, but no reference to a leach field. (AR00039) • Dry well located on east corner of Building 1140. The dry well was connected to both the building roof and floor drains. A 24-inch tile lined culvert is buried under the entire length of the building and connects the roof drain pipes to the dry well. Reportedly, an active contract was underway to disconnect the floor drains from the dry well and divert the wastewater to an oil/water separator for discharge to the sanitary sewer line in 1995. (AR00342) • Former dry well located inside the northwest end of Building 1134. The dry well was the only drain in Building 1134 which was used through 1992 to wash large vehicles such as snow plows and dump trucks. The dry well was reported sealed shut with cement in 1993. (AR00352) • An aboveground storage tank positioned directly over Well 44M05. (AR00479) • Aircraft maintenance operations. • Outdoor asphalt covered wash pad between Buildings 1133 and 1134. • Past spills and/or surface drainage/run-off from adjacent flightline operations. • Surface application of oil and ground asphalt in the soil.

Action Information

Action Date	Action	Description	DEC Staff
1/16/1992	Site Added to Database	This site is included in the state EPA Eielson FFA 100.38.011.	Former Staff
9/2/1992	Site Ranked Using the AHRM	Initial ranking.	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. Items # 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)). Letter sent in response to Draft RI document. Contaminants of concern are TCE, DCE, and benzene in groundwater. Contaminants of concern in soil include elevated levels of TPH and PAHs.	Rielle Markey
8/12/1993	Meeting or Teleconference Held	Meeting in Seattle with EAFB and EPA to discuss the RI at this site. Conclusions were that this site will not go to a FS.	Rielle Markey
10/18/1993	Site Ranked Using the AHRM	Initial ranking.	Former Staff
6/13/1995	Site Ranked Using the AHRM	This site was reranked according to information in the May 1995 OU3, 4, and 5 Remedial Investigation Report(RI). Previous score was 44. X-ref to file# 107.38.059 which is Range Operation Facility, formerly Building 1143.	Clint Adler
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
2/16/1996	Update or Other Action	(Old R:Base Action Code = RA - Remedial Action). Received Remedial Action Workplan.	Clint Adler
4/15/1996	Update or Other Action	(Old R:Base Action Code = RD - Remedial Design). Air Force Comments on Draft Remedial Design for OU-3, 4 and 5.	Clint Adler
5/10/1996	Update or Other Action	(Old R:Base Action Code = RD - Remedial Design). OU-3, 4, and 5, RDRA Workplan, EAFB.	Clint Adler
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 updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 10/23/95.	S&W
1/21/1998	Update or Other Action	Remedial design completed and implemented by ADEC 1997. Issues resolved at weekly teleconference with Base/EPA.	Ronan Short
12/26/2001	GIS Position Updated	Worked with Heather Goldman obtaining GIS latitude and longitude from 1:63,300 topographic map.	Heather Goldman
1/14/2002	Site Number Identifier Changed	Changed Workplan from X1 to X9 to reflect presence of a hazardous substance.	Ann Farris
9/2/2002	Institutional Control Record Established	When the OU-3,4,5 ROD was signed in 1995, 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
9/2/2002	Long Term Monitoring Established	This site is included in the Sitewide Monitoring Program. Site should be monitored in 2004 and 2006 for VOCs.	Emily Youcha
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
6/24/2005	Update or Other Action	Staff reviewed the 2004 Sitewide Monitoring Report for this site. Only 1 sample was collected from this site and was collected from a temporary push well. Staff does not concur with using a temporary push well to conduct long-term monitoring. Sample results indicate TCE exists above the MCL at well 44M04Band results seem to indicate the contamination is localized.	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
5/25/2006	Update or Other Action	Contaminated Sites staff reviewed a dewatering permit with DEC Division of Water staff for Eielson Air Force Base. Dewatering will occur within 1000 feet of this contaminated site. Staff requested the contractor to estimate the radius of influence for each dewatering project under the worst-case pumping scenario. It was determined that the contaminated site would likely not be impacted by dewatering, but to be conservative, the contractor will be required to monitor for chlorinated solvents, total aqueous hydrocarbons, and total aromatic hydrocarbons.	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
10/11/2006	Update or Other Action	DEC reviewed the draft 2006 sitewide monitoring program workplan. The schedule indicates ground water monitoring should occur at this site in 2006, however, it was not included in the workplan. Staff provided comments. If it is not monitored in 2006, it should be included in the 2007 workplan for monitoring.	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
5/16/2008	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
3/18/2014	Document, Report, or Work plan Review - other	2012-Final installation-wide monitoring program report received June, 24 2013. During the 2012 season, a total of 40 PSG samplers were installed and sampled. Through PSG the (TVOCs) total volatile organic compounds found indicated two areas of TVOC mass consisting primarily of BTEX and other fuel-related contaminants. TVOCs exceeded 1,000 ng in the majority of locations south of Building 1140 and in only three locations near Building 1138. Additionally, one area of TCE mass was identified, centered on an area west of well 44M04C. TCE exceeded 1,000ng in three locations (07S, 08S, and 09S).The PSG results confirmed previous investigation results and indicated that 1) a small area of low concentrations of petroleum contamination is present in the vicinity of Building 1138. 2) A larger area of petroleum contamination is present south of Building 1140. However, due to a lack of exceedances of FRGs in groundwater samples collected from this area, soil contamination does not appear to be leaching to groundwater. 3) TCE results indicate the source of TCE is located beneath the parking apron (09S and 08S). Three new monitoring wells were installed, with a total of six wells being sampled (3 new and 3 existing). There was no detected COCs (Contaminant of concern) or COPC (Contaminant of potential concern) with levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. No known groundwater contaminant plume has been identified at this site. In general, based on the comparison between the 2012 and historical concentrations and plume extents, the groundwater impacts contaminants of concern appear to be stable or decreasing. However, based on the limited data available, additional monitoring is needed to determine contaminant trends for TCE in the vicinity of former well 44M04C.	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 season, six monitoring wells was sampled in both spring and fall 2013. There was no detected COCs (Contaminant of concern) or COPC (Contaminant of potential concern) with levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. No known groundwater contaminant plume has been identified at this site. However, data gaps were identified in both the 2012 IWMP and 2013 FYR, and will be addressed in the 2014 IWMP.	Anna Iverson
6/26/2014	Site Visit	CS staff participated in an all-day site visit with EPA and USAF personnel. Sites visit included WP45/SS57, ST58, SS67, SS62, DP44, LF02, LF06 and LF07. Site DP44, has ICs in place, one monitoring well (44MO3) appeared to be tampered with and the cap had been removed.	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 DP44.	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
3/5/2021	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 71361 Building 2511 (1140).	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

Action Date

Action

Description

DEC Staff

1/16/1992

Site Added to Database

This site is included in the state EPA Eielson FFA 100.38.011.

Former Staff

9/2/1992

Site Ranked Using the AHRM

Initial ranking.

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. Items # 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)). Letter sent in response to Draft RI document. Contaminants of concern are TCE, DCE, and benzene in groundwater. Contaminants of concern in soil include elevated levels of TPH and PAHs.

Rielle Markey

8/12/1993

Meeting or Teleconference Held

Meeting in Seattle with EAFB and EPA to discuss the RI at this site. Conclusions were that this site will not go to a FS.

Rielle Markey

10/18/1993

Site Ranked Using the AHRM

Initial ranking.

Former Staff

6/13/1995

Site Ranked Using the AHRM

This site was reranked according to information in the May 1995 OU3, 4, and 5 Remedial Investigation Report(RI). Previous score was 44. X-ref to file# 107.38.059 which is Range Operation Facility, formerly Building 1143.

Clint Adler

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

2/16/1996

Update or Other Action

(Old R:Base Action Code = RA - Remedial Action). Received Remedial Action Workplan.

Clint Adler

4/15/1996

Update or Other Action

(Old R:Base Action Code = RD - Remedial Design). Air Force Comments on Draft Remedial Design for OU-3, 4 and 5.

Clint Adler

5/10/1996

Update or Other Action

(Old R:Base Action Code = RD - Remedial Design). OU-3, 4, and 5, RDRA Workplan, EAFB.

Clint Adler

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 updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 10/23/95.

S&W

1/21/1998

Update or Other Action

Remedial design completed and implemented by ADEC 1997. Issues resolved at weekly teleconference with Base/EPA.

Ronan Short

12/26/2001

GIS Position Updated

Worked with Heather Goldman obtaining GIS latitude and longitude from 1:63,300 topographic map.

Heather Goldman

1/14/2002

Site Number Identifier Changed

Changed Workplan from X1 to X9 to reflect presence of a hazardous substance.

Ann Farris

9/2/2002

Institutional Control Record Established

When the OU-3,4,5 ROD was signed in 1995, 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

9/2/2002

Long Term Monitoring Established

This site is included in the Sitewide Monitoring Program. Site should be monitored in 2004 and 2006 for VOCs.

Emily Youcha

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

6/24/2005

Update or Other Action

Staff reviewed the 2004 Sitewide Monitoring Report for this site. Only 1 sample was collected from this site and was collected from a temporary push well. Staff does not concur with using a temporary push well to conduct long-term monitoring. Sample results indicate TCE exists above the MCL at well 44M04Band results seem to indicate the contamination is localized.

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

5/25/2006

Update or Other Action

Contaminated Sites staff reviewed a dewatering permit with DEC Division of Water staff for Eielson Air Force Base. Dewatering will occur within 1000 feet of this contaminated site. Staff requested the contractor to estimate the radius of influence for each dewatering project under the worst-case pumping scenario. It was determined that the contaminated site would likely not be impacted by dewatering, but to be conservative, the contractor will be required to monitor for chlorinated solvents, total aqueous hydrocarbons, and total aromatic hydrocarbons.

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

10/11/2006

Update or Other Action

DEC reviewed the draft 2006 sitewide monitoring program workplan. The schedule indicates ground water monitoring should occur at this site in 2006, however, it was not included in the workplan. Staff provided comments. If it is not monitored in 2006, it should be included in the 2007 workplan for monitoring.

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

5/16/2008

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

3/18/2014

Document, Report, or Work plan Review - other

2012-Final installation-wide monitoring program report received June, 24 2013. During the 2012 season, a total of 40 PSG samplers were installed and sampled. Through PSG the (TVOCs) total volatile organic compounds found indicated two areas of TVOC mass consisting primarily of BTEX and other fuel-related contaminants. TVOCs exceeded 1,000 ng in the majority of locations south of Building 1140 and in only three locations near Building 1138. Additionally, one area of TCE mass was identified, centered on an area west of well 44M04C. TCE exceeded 1,000ng in three locations (07S, 08S, and 09S).The PSG results confirmed previous investigation results and indicated that 1) a small area of low concentrations of petroleum contamination is present in the vicinity of Building 1138. 2) A larger area of petroleum contamination is present south of Building 1140. However, due to a lack of exceedances of FRGs in groundwater samples collected from this area, soil contamination does not appear to be leaching to groundwater. 3) TCE results indicate the source of TCE is located beneath the parking apron (09S and 08S). Three new monitoring wells were installed, with a total of six wells being sampled (3 new and 3 existing). There was no detected COCs (Contaminant of concern) or COPC (Contaminant of potential concern) with levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. No known groundwater contaminant plume has been identified at this site. In general, based on the comparison between the 2012 and historical concentrations and plume extents, the groundwater impacts contaminants of concern appear to be stable or decreasing. However, based on the limited data available, additional monitoring is needed to determine contaminant trends for TCE in the vicinity of former well 44M04C.

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 season, six monitoring wells was sampled in both spring and fall 2013. There was no detected COCs (Contaminant of concern) or COPC (Contaminant of potential concern) with levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. No known groundwater contaminant plume has been identified at this site. However, data gaps were identified in both the 2012 IWMP and 2013 FYR, and will be addressed in the 2014 IWMP.

Anna Iverson

6/26/2014

Site Visit

CS staff participated in an all-day site visit with EPA and USAF personnel. Sites visit included WP45/SS57, ST58, SS67, SS62, DP44, LF02, LF06 and LF07. Site DP44, has ICs in place, one monitoring well (44MO3) appeared to be tampered with and the cap had been removed.

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 DP44.

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

3/5/2021

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 71361 Building 2511 (1140).

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

Contaminant Information

Name	Level Description	Media
Trichloroethene	> Table C	Groundwater
Benzene	> Table C	Groundwater
cis-1,2-Dichloroethylene	> Table C	Groundwater
TPH	Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation	Soil

Name

Level Description

Media

Comments

Trichloroethene

> Table C

Groundwater

Benzene

> Table C

Groundwater

cis-1,2-Dichloroethylene

> Table C

Groundwater

TPH

Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation

Soil

Control Type

Type	Details
Interagency MOU	Operable Unit 3, 4, 5 Record of Decision

Type

Details

Interagency MOU

Operable Unit 3, 4, 5 Record of Decision

Requirements

Description	Details
Groundwater Monitoring	Site is included in Sitewide Monitoring Program. There is a requirement that all monitoring wells are secured with locks. Annual Report, monitoring frequency varies
Groundwater Use Restrictions	A prohibition on the installation or use of drinking water wells. Any activity that may result in exposure to contaminated ground water or moving contaminated ground water requires approval of 354 CES/CEV, If contaminated ground water is removed from the source, it must be disposed of or treated in accordance with regulations. Annual IC Report
Restricted to Industrial / Commercial Land Use	Requirement to notify ADEC and EPA of any proposal to change the existing land use or land use controls at the site. Place written notification of the remedial actions at the site in the base land use master plan. Written notification to DEC.
New Construction Restrictions	Any activity that may result in exposure to or removal of contam. soil requires approval of CES/CEV IC report (Annual)
Excavation / Soil Movement Restrictions	If contaminated soil is removed from the source, it must be disposed of or treated in accordance with regulation Annual IC Report, 5 year reviews

Description

Details

Groundwater Monitoring

Site is included in Sitewide Monitoring Program. There is a requirement that all monitoring wells are secured with locks. Annual Report, monitoring frequency varies

Groundwater Use Restrictions

A prohibition on the installation or use of drinking water wells. Any activity that may result in exposure to contaminated ground water or moving contaminated ground water requires approval of 354 CES/CEV, If contaminated ground water is removed from the source, it must be disposed of or treated in accordance with regulations. Annual IC Report

Restricted to Industrial / Commercial Land Use

Requirement to notify ADEC and EPA of any proposal to change the existing land use or land use controls at the site. Place written notification of the remedial actions at the site in the base land use master plan. Written notification to DEC.

New Construction Restrictions

Any activity that may result in exposure to or removal of contam. soil requires approval of CES/CEV IC report (Annual)

Excavation / Soil Movement Restrictions

If contaminated soil is removed from the source, it must be disposed of or treated in accordance with regulation Annual IC Report, 5 year reviews

Eielson Air Force Base Operable Units 3,4, and 5 Declaration of the Amended Record of Decision

United States Air Force Environmental Restoration Program Eielson Air Force Base, Alaska Operable Units 3,4,5 Record of Decision Final September 1995

No associated sites were found.

Missing Location Data

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Site Report: Eielson AFB (OU-3) (DP044) Battery Shop

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Eielson Air Force Base Operable Units 3,4, and 5 Declaration of the Amended Record of Decision

United States Air Force Environmental Restoration Program Eielson Air Force Base, Alaska Operable Units 3,4,5 Record of Decision Final September 1995

Missing Location Data

State of Alaska Department of Environmental Conservation