Site Report: Eielson Take Off Pad Mapco Tie-in DESC

Site Name:	Eielson Take Off Pad Mapco Tie-in DESC
Address:	8725 John Kingman Road, #2941, Eielson AFB, AK 99702
File Number:	107.38.097
Hazard ID:	2657
Status:	Active
Staff:	Axl LeVan, 9074512156 axl.levan@alaska.gov
Latitude:	64.656306
Longitude:	-147.010556
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

This site is located at milepost 26.88 of the Mapco/Eielson pipeline (12-mile pipeline from North Pole to Eielson). Address is 8725 John Kingman Road. Site is located on Eielson Air Force Base but the responsible party is Defense Logistics Agency - Energy. Multiple spills occurred at this site in the 1950s. In 2004 the gravel pad was excavated and soil was treated. One sample from the bottom of the excavation exceeded cleanup levels for gasoline range organics (GRO), diesel range organics (DRO) and benzene. Groundwater monitoring has been conducted since 2005. 2009 monitoring identified GRO up to 24.8 mg/L, DRO up to 74.8 mg/L and benzene up to 0.784 mg/L. 2011 monitoring was deferred until 2012 to allow time to replace frost-jacked wells and create a comprehensive plan for moving this site to closure. 2012 field work will include groundwater, surface water and soil sampling, as well as collection of groundwater flow direction and monitored natural attenuation parameters.

Action Information

Action Date	Action	Description	DEC Staff
9/20/1996	Site Added to Database	DRO and GRO.	Jeff Peterson
10/22/1999	Update or Other Action	A site assessment was conducted along the Mapco-Eielson pipeline. This Reckey refers to a break at the Eielson Take Off, MP 26.88. Needs Review.	Rielle Markey
5/1/2001	Site Characterization Workplan Approved	Approved groundwater monitoring plan for the Eielson Take-Off Pad DESC has contracted Michael L. Foster and Associates for the monitoring work.	Greg Light
11/7/2002	Update or Other Action	Groundwater monitoring continues on a quarterly basis. Proposed Plan from DESC pending.	Greg Light
9/19/2003	Meeting or Teleconference Held		Ann Farris
7/6/2004	Meeting or Teleconference Held	discussed interim action plan june 30, 2004	Sharon Richmond
7/6/2004	Interim Removal Action Approved	plan includes excavation of gravel pad. gravel will be transported offsite for thermal remediation. Two monitoring wells will be destroyed during removal. Expect report on removal action and plan for monitoring well installation and long term groundwater montioring plan later this summer	Sharon Richmond
1/13/2005	Update or Other Action	Staff reviewed the Interim Action Report submitted Dec 20, 2004. The gravel pad was excavated and soil treated at OIT. One sample from the bottom of the excavation exceeded ADEC cleanup levels for GRO, DRO, and benzene. The Department agreed that additional remedial action was not necessary but the site could not be closed until groundwater meets applicable cleanup levels. The comment letter included a request for quarterly monitoring reports for 2004 to be submitted and recommended installation of a monitoring well in the footprint of the pad excavation. Staff also suggested that groundwater sampling be reduced from quarterly to annually. The site was then transferred to Emily Youcha.	Sharon Richmond
6/16/2005	Update or Other Action	Received long-term monitoring plan report. Ground water remains contaminated with free product and dissolved phase petroleum. Staff recommends two additional wells should be installed.	Emily Youcha
7/15/2005	Long Term Monitoring Established	Staff approved annual ground-water monitoring and developement of two additional ground-water monitoring wells. Ground-water will be monitored on an annual basis in the summer until a trend analysis can be conducted and contaminant concentrations in the ground water are below cleanup levels.	Emily Youcha
8/1/2005	Update or Other Action	Staff received a summary report of the installation of two new wells, MW10 and MW11.	Emily Youcha
8/17/2005	Update or Other Action	Staff visited the site. Two new wells were installed. The outer casing of one downgradient well (MW-9) was damaged by a snowplow. Staff will request the RP repair the well and continue long term monitoring.	Emily Youcha
8/17/2005	GIS Position Updated	Staff took a coordinate with handheld GPS 76.	Emily Youcha
10/7/2005	Update or Other Action	Staff reviewed the 2005 long-term ground-water monitoring report. In August 2005, MW5 and MW6 could not be sampled because the water levels were too low. The outer casing on the damaged well was cut off and a flushmount top was installed. Results of the sampling indicate DRO, GRO, benzene, and toluene remain in the soil above Table C cleanup levels.	Emily Youcha
8/3/2006	Update or Other Action	Contaminated Sites staff provided comments on the Defense Fuels Eielson Take-Off Pad new well installation. Wells MW5 and 6 will be replaced with longer well screens due to frost jacking. Addiitonally, staff recommended placing an additional well downgradient of MW9 in order to determine the full extent of the plum and verify that contamination is not migrating. During the 2007 re-evalution of the monitoring plan, DEC should request the placement of the downgradient additional well. See notes in file.	Emily Youcha
8/28/2006	Site Ranked Using the AHRM	Initial Ranking.	Emily Youcha
9/11/2006	Update or Other Action	2006 Long-term monitoring (summer sampling report) report was received. New wells MW-5R MW6R, and old wells MW9, MW10, and MW11 were monitored. Benzene contamination was detected in MW6R, previously not detected in MW6, but new well is not located exactly in the location of the former well. Next year, a new well should be placed downgradient of MW9 in order to determine the full downgradient extent of the plume.	Emily Youcha
10/12/2007	Update or Other Action	2007 Summer Sampling Report was received. The monitoring wells that were sampled included MW-5R, MW-6R, MW-9, MW-10 and MW-11. Benzene levels in all the monitoring well exceed ADEC Table C cleanup levels.	Deborah Williams
10/16/2007	Exposure Tracking Model Ranking	Initial ranking completed.	Deborah Williams
5/2/2008	Meeting or Teleconference Held	Attended a meeting with Jack Appolloni and Michael L. Foster to discuss future plans for the site. ADEC requested that a conceptual site model be completed for the site to determine if all the exposure pathways have been evaluated and to help determine what future remediation and/or monitoring is required for the site.	Deborah Williams
11/18/2008	Update or Other Action	ADEC received the 2008 Summer Sampling Report for the Eielson Take-Off Pad site. The field activities for the 2008-Summer sampling event included sampling of five groundwater monitoring wells which were completed during the month of September. Sampling results included the following above ADEC cleanup levels: MW-5R had GRO 5.05 ppm, DRO 2.18 ppm, and benzene at 0.0228 ppm. MW-9: DRO 5.13 ppm and benzene at 0.0240 ppm. MW-10: all below ADEC cleanup levels and MW-11: GRO 15.1 ppm, DRO 37.5 ppm, benzene 0.321 ppm.	Deborah Williams
12/12/2008	Update or Other Action	ADEC received Monitoring Well Installation Report for the Eielson Take-Off Pad. On September 29, 2008, and monitoring well was installed downgradient (north) of MW-9. The well boring was installed to 3 feet below the groundwater. The screened interval of the monitoring well was 8 to 13 feet bgs. Groundwater samples were collected from MW-12 on September 30, 2008. The groundwater sample was analyzed for GRO, DRO, and BTEX. One groundwater sample and a duplicate were taken from MW-12. The RPD for the sample was not less than 30% for the duplicate. Sample results were ND to 8.53 mg/L for DRO and up to 16.5 ug/L benzene.	Deborah Williams
10/16/2009	Update or Other Action	ADEC received the 2009 Summer Sampling Report for the Eielson Take-Off Pad site. The field activities for the 2009-Summer sampling event included sampling of six groundwater monitoring wells which were completed during the month of August. Sampling results included the following above ADEC cleanup levels: MW-5R had GRO 3.34ppm. MW-9: benzene at 0.0135 ppm. MW-10: DRO at 7.00 ppm and Benzene at .0297 ppm and MW-11: GRO 24.8 ppm, DRO 74.8 ppm, benzene 0.784 ppm, Touluene at 1.34ppm. MW12 had Benzene at .0126. Analysis of historical trends shows that overall contaminants are decreasing from historical ranges in most areas of the site except for what appears to be an increasing 4 year GRO and Benzene trend in MW11. No free product was detected at the site in the monitoring wells.	Fred Vreeman
3/3/2011	Document, Report, or Work plan Review - other	Contaminated Sites staff approved a work plan for groundwater monitoring at the Eielson Take-Off Pad site located on Eielson Air Force Base at Milepost 26.87/26.88 of the Eielson Pipeline. The pad and contaminated soil were excavated in 2004 but subsequent soil and groundwater monitoring has identified concentrations of diesel range organics (DRO), gasoline range organics (GRO), benzene and toluene above cleanup levels. During the 2011 sampling event eight previously-installed monitoring wells will be sampled for DRO, GRO and benzene, toluene, ethylbenzene and xylenes (BTEX). Results will be used to assess changes over time.	Kathleen Beutel
7/18/2011	Site Visit	Contaminated Sites staff participated in a site visit. Nearly all monitoring wells are severely frost-jacked. Several new wells will be installed in 2012.	Kathleen Beutel
7/18/2011	Site Visit	Contaminated Sites staff participated in a site visit. Nearly all monitoring wells are severely frost-jacked. Several new wells will be installed in 2012.	Kim DeRuyter
7/19/2011	Meeting or Teleconference Held	Contaminated Sites (CS) and DLA staff participated in a meeting to discuss three sites: Moose Creek, Manchu Road and the Eielson Take-Off Pad. CS and DLA staff discussed funding, plans for 2012 and the need to move these sites toward closure. No groundwater monitoring will be conducted at the Take-Off Pad in 2011; instead, a more comprehensive plan that will include replacement of frost-jacked wells, sampling for additional contaminants of potential concern and an effort to bound the dissolved-phase plume will be submitted in early 2012. All parties agreed that signed decision documents (DDs) will provide a clear path forward and possibly ease challenges in obtaining funding. It is anticipated that DDs for Manchu Road and the Take-Off Pad will be prepared within the next year and a DD for Moose Creek will be prepared within the next two years.	Kathleen Beutel
7/19/2011	Meeting or Teleconference Held	Contaminated Sites (CS) and DLA staff participated in a meeting to discuss three sites: Moose Creek, Manchu Road and the Eielson Take-Off Pad. CS and DLA staff discussed funding, plans for 2012 and the need to move these sites toward closure. No groundwater monitoring will be conducted at the Take-Off Pad in 2011; instead, a more comprehensive plan that will include replacement of frost-jacked wells, sampling for additional contaminants of potential concern and an effort to bound the dissolved-phase plume will be submitted in early 2012. All parties agreed that signed decision documents (DDs) will provide a clear path forward and possibly ease challenges in obtaining funding. It is anticipated that DDs for Manchu Road and the Take-Off Pad will be prepared within the next year and a DD for Moose Creek will be prepared within the next two years.	Kim DeRuyter
8/11/2011	Update or Other Action	Contaminated Sites staff approved deferral of groundwater sampling until 2012. Four of the seven monitoring wells are frost-jacked and require decommissioning and replacement. Deferring sampling will allow time to assess optimal locations for replacement wells and to develop a comprehensive plan for this site. DLA will submit a work plan prior to the 2012 field season.	Kathleen Beutel
2/23/2012	Site Characterization Workplan Approved	Contaminated Sites staff approved the Fiscal year 2012 Work Plan, which describes installation of ten temporary well points and six monitoring wells, surface water and soil sampling, and collection of groundwater flow and monitored natual attenuation parameters.	Kathleen Beutel
4/30/2014	Document, Report, or Work plan Review - other	Final 2013 Groundwater Monitoring Report at Eielson Take-Off Pad SS67 received April, 2014. Of these ten wells, three showed exceedances for benzene, two for diesel–range organics, and one for gasoline range organics. MW-11 showed the highest exceedances, with GRO at 5.67 mg/L, DRO at 4.09 mg/L, and benzene at 0.22 mg/L. Trend analysis indicates that contaminant levels are generally stable or decreasing.	Anna Iverson
1/30/2015	Document, Report, or Work plan Review - other	Final 2014 Groundwater Monitoring Report at Eielson Take-Off Pad SS67 received January 2015. Results from the analytical sampling showed that levels of petroleum compounds in groundwater continue to exceed cleanup levels. Historically, several monitoring wells have consistently shown exceedances of GRO, DRO, and benzene. In 2014, the only exceedances were for benzene, in wells MW-11 and MW-12. It should be noted that 2014 had unusually high groundwater levels, possibly resulting in dilution and temporarily reduced contaminant levels in monitoring wells.	Anna Iverson
4/4/2016	Update or Other Action	PAH information is summarized below for the forthcoming decision document. Information is taken from the EIELSON TAKE-OFF PAD SITE CHARACTERIZATION AND MONITORING FY2012 Final Report. Table 8 covers soil samples. Table 9 covers groundwater samples. Soil: of the 16 PAHs reported, 15 did not exceed 2016 proposed values. Only naphthalene exceed 2016 proposed value of .0381 mg/kg, in SB-09 (.022 mg/kg), SB-17 (.063 mg/kg) , SB-18 (3.6 mg/kg), SB-19 (.36 mg/kg), SB-25 (.46 mg/kg), and SB-26 (.058/.11 mg/kg JD-flagged). Groundwater:	Eric Breitenberger
10/5/2016	Document, Report, or Work plan Review - other	Final Eielson Take Off Pad, Eielson Air Force Base, Alaska Monitoring Well Decommissioning, Installation, and Groundwater Monitoring Work Plan was received September 2016. The work plan was for decommissioning monitoring wells: MW-13, MW-14, MW-15 and MW-17, installing monitoring wells to replace any frostjacked monitoring wells, if any require it, and completing one groundwater monitoring event for monitoring wells (MW-10, MW-11, MW-12, MW-16, MW-18 and MW-19).	Eric Breitenberger
4/18/2017	Document, Report, or Work plan Review - other	Final Eielson Take-Off Pad Monitoring Well Installation, Decommissioning, and Groundwater Monitoring Report received April 18, 2017. The report describes the 2016 field activities for decommissioning monitoring wells; MW-13, MW-14, MW-15, MW-17 and MW-18, installing monitoring well MW-18R to replace MW-18 and sample for contaminants of concern at MW-10, MW-11, MW-12, MW-16, MW-18R and MW-19. At MW-11, GRO, DRO, benzene and ethylbenzene exceeded ADEC cleanup levels. Benzene also exceeded cleanup levels at MW-12 and MW-18R. In accordance with the Decision Document dated January 21, 2016, a monitoring frequency of every 3 years will be established until all COC levels are below cleanup levels for two consecutive events. The next groundwater sampling event is scheduled for 2019.	Erica Blake
5/22/2018	Update or Other Action	DEC received a 2017 site inspection report for the Eielson Take-off Pad (ETOP) site from the Defense Logistics Agency (DLA). DLA inspected the site on August 9, 2017. No individuals were on site during the inspection, no structures were observed, no apparent change of land use, and no other work going at Eielson Air Force Base has impacted this release site. The monitoring wells were inspected for signs of frost jacking, damage, or any other changes that could influence the groundwater. At the time of the 2017 site inspection, no maintenance was required. The next site visit will be conducted in 2018. During this site visit the monitoring wells will be unlocked and opened to see if any well repairs will be required prior to the 2019 groundwater sampling event.	Erica Blake
6/28/2018	Site Visit	DEC conducted a site visit with Defense Logistics Agency (DLA) staff. DEC and DLA walked the site to inspect the monitoring wells. Everything was observed to be in good condition.	Erica Blake
1/15/2019	Update or Other Action	DEC received a 2018 site inspection report for the Eielson Take-off Pad (ETOP) site from the Defense Logistics Agency (DLA). DLA inspected the site on June 27, 2018. No individuals were on site during the inspection, no structures were observed, no apparent change of land use, and no other work going at Eielson Air Force Base has impacted this release site. The monitoring wells were inspected for signs of frost jacking, damage, or any other changes that could influence the groundwater. At the time of the 2018 site inspection, no maintenance was required. Wells that the DLA PM could open were checked for any damages. The next site inspection will be conducted in 2020 and groundwater monitoring will take place in 2019.	Bri Clark
8/2/2019	Update or Other Action	Dec received and commented on "Decision Document Eielson Take-Off Pad - Eielson Air Force Base, Alaska" dated May 9, 2019. The Decision Document presented a remedy to address petroleum hydrocarbon contamination in soil and groundwater at the Take-Off Pad site.	Sara Marshall
8/26/2019	Document, Report, or Work plan Review - other	DEC provided comments for the Draft Eielson Take-Off Pad, Eielson Air Force Base, Alaska Monitoring Well Decommissioning and Installation, and Groundwater Monitoring Work Plan, July, 2019. The work plan provided information on the decommissioning of MW-16 and installation of MW-16R. Groundwater monitoring and sampling activities will take place at MW-10, MW- 11, MW-12, MW-16R, MW-18R, and MW-19. The groundwater samples be analyzed for GRO/DRO/RRO, and BTEX.	Sara Marshall
9/20/2019	Institutional Control Periodic Reporting	DEC received the final Eielson Take-Off Pad, Eielson Air Force Base, Alaska Monitoring Well Decommissioning and Installation, and Groundwater Monitoring Work Plan, July, 2019. The work plan described monitoring well decommissioning and installation activities as well as sampling and analysis plans to take place during the fall 2019 field season.	Sara Marshall
4/23/2021	Meeting or Teleconference Held	DEC and Defense Logistic Agency PM had a meeting to discuss the current status of DLA sites. Current and expected documents regarding the sites were discussed. The status of clean-up efforts and monitoring at sites was also discussed.	Axl LeVan
7/23/2021	Site Visit	DEC conducted a site visit with Defense Logistics Agency (DLA) staff. DEC and DLA walked the site to inspect the monitoring wells. Two of the wells on the site were frostjacked. MW18R had slight frostjacking and still is locked. MW16R is highly frostjacked and no longer capped. DLA will be replacing MW16R before the next sampling event.	Axl LeVan
9/6/2022	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (DEC) has completed a review of the "Draft Eielson Take-Off Pad, 2022 Groundwater Monitoring Work Plan, Eielson Air Force Base, Alaska, September 2022" submitted by Defense Logistics Agency - Energy on September 2, 2022. DEC submitted comments for the document on September 6, 2022. The planned 2022 field activities will include groundwater monitoring and collection of groundwater samples for chemical analysis. Groundwater monitoring and sampling activities will be conducted at six wells: MW-10, MW-11, MW-12, MW-16R, MW-18R, and MW-19. Groundwater samples will be submitted for analyses for Site contaminants of concern. Well replacement and decommissioning is planned for up to three monitoring wells, depending on funding and the success of well repair attempts.	Axl LeVan
9/28/2022	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (DEC) has completed a review and approved the "Final Eielson Take-Off Pad, 2022 Groundwater Monitoring Work Plan, Eielson Air Force Base, Alaska, September 2022" submitted by Defense Logistics Agency - Energy on September 28, 2022. The planned 2022 field activities will include groundwater monitoring and collection of groundwater samples for chemical analysis. Groundwater monitoring and sampling activities will be conducted at six wells: MW-10, MW-11, MW-12, MW-16R, MW-18R, and MW-19. Groundwater samples will be submitted for analyses for Site contaminants of concern. Well replacement and decommissioning is planned for up to three monitoring wells, depending on funding and the success of well repair attempts.	Axl LeVan
6/12/2023	Document, Report, or Work plan Review - other	DEC reviewed and provided comments for the "Draft Eielson Take-Off Pad, 2022 Groundwater Monitoring Report, June 2023". The report documents well repairs and long-term monitoring at the site.	Axl LeVan
7/21/2023	Document, Report, or Work plan Review - other	DEC reviewed and approved the "Final Eielson Take-Off Pad, 2022 Groundwater Monitoring Report, July 2023". The report documents well repairs and long-term monitoring at the site.	Axl LeVan

Action Date

Action

Description

DEC Staff

9/20/1996

Site Added to Database

DRO and GRO.

Jeff Peterson

10/22/1999

Update or Other Action

A site assessment was conducted along the Mapco-Eielson pipeline. This Reckey refers to a break at the Eielson Take Off, MP 26.88. Needs Review.

Rielle Markey

5/1/2001

Site Characterization Workplan Approved

Approved groundwater monitoring plan for the Eielson Take-Off Pad DESC has contracted Michael L. Foster and Associates for the monitoring work.

Greg Light

11/7/2002

Update or Other Action

Groundwater monitoring continues on a quarterly basis. Proposed Plan from DESC pending.

Greg Light

9/19/2003

Meeting or Teleconference Held

Ann Farris

7/6/2004

Meeting or Teleconference Held

discussed interim action plan june 30, 2004

Sharon Richmond

7/6/2004

Interim Removal Action Approved

plan includes excavation of gravel pad. gravel will be transported offsite for thermal remediation. Two monitoring wells will be destroyed during removal. Expect report on removal action and plan for monitoring well installation and long term groundwater montioring plan later this summer

Sharon Richmond

1/13/2005

Update or Other Action

Staff reviewed the Interim Action Report submitted Dec 20, 2004. The gravel pad was excavated and soil treated at OIT. One sample from the bottom of the excavation exceeded ADEC cleanup levels for GRO, DRO, and benzene. The Department agreed that additional remedial action was not necessary but the site could not be closed until groundwater meets applicable cleanup levels. The comment letter included a request for quarterly monitoring reports for 2004 to be submitted and recommended installation of a monitoring well in the footprint of the pad excavation. Staff also suggested that groundwater sampling be reduced from quarterly to annually. The site was then transferred to Emily Youcha.

Sharon Richmond

6/16/2005

Update or Other Action

Received long-term monitoring plan report. Ground water remains contaminated with free product and dissolved phase petroleum. Staff recommends two additional wells should be installed.

Emily Youcha

7/15/2005

Long Term Monitoring Established

Staff approved annual ground-water monitoring and developement of two additional ground-water monitoring wells. Ground-water will be monitored on an annual basis in the summer until a trend analysis can be conducted and contaminant concentrations in the ground water are below cleanup levels.

Emily Youcha

8/1/2005

Update or Other Action

Staff received a summary report of the installation of two new wells, MW10 and MW11.

Emily Youcha

8/17/2005

Update or Other Action

Staff visited the site. Two new wells were installed. The outer casing of one downgradient well (MW-9) was damaged by a snowplow. Staff will request the RP repair the well and continue long term monitoring.

Emily Youcha

8/17/2005

GIS Position Updated

Staff took a coordinate with handheld GPS 76.

Emily Youcha

10/7/2005

Update or Other Action

Staff reviewed the 2005 long-term ground-water monitoring report. In August 2005, MW5 and MW6 could not be sampled because the water levels were too low. The outer casing on the damaged well was cut off and a flushmount top was installed. Results of the sampling indicate DRO, GRO, benzene, and toluene remain in the soil above Table C cleanup levels.

Emily Youcha

8/3/2006

Update or Other Action

Contaminated Sites staff provided comments on the Defense Fuels Eielson Take-Off Pad new well installation. Wells MW5 and 6 will be replaced with longer well screens due to frost jacking. Addiitonally, staff recommended placing an additional well downgradient of MW9 in order to determine the full extent of the plum and verify that contamination is not migrating. During the 2007 re-evalution of the monitoring plan, DEC should request the placement of the downgradient additional well. See notes in file.

Emily Youcha

8/28/2006

Site Ranked Using the AHRM

Initial Ranking.

Emily Youcha

9/11/2006

Update or Other Action

2006 Long-term monitoring (summer sampling report) report was received. New wells MW-5R MW6R, and old wells MW9, MW10, and MW11 were monitored. Benzene contamination was detected in MW6R, previously not detected in MW6, but new well is not located exactly in the location of the former well. Next year, a new well should be placed downgradient of MW9 in order to determine the full downgradient extent of the plume.

Emily Youcha

10/12/2007

Update or Other Action

2007 Summer Sampling Report was received. The monitoring wells that were sampled included MW-5R, MW-6R, MW-9, MW-10 and MW-11. Benzene levels in all the monitoring well exceed ADEC Table C cleanup levels.

Deborah Williams

10/16/2007

Exposure Tracking Model Ranking

Initial ranking completed.

Deborah Williams

5/2/2008

Meeting or Teleconference Held

Attended a meeting with Jack Appolloni and Michael L. Foster to discuss future plans for the site. ADEC requested that a conceptual site model be completed for the site to determine if all the exposure pathways have been evaluated and to help determine what future remediation and/or monitoring is required for the site.

Deborah Williams

11/18/2008

Update or Other Action

ADEC received the 2008 Summer Sampling Report for the Eielson Take-Off Pad site. The field activities for the 2008-Summer sampling event included sampling of five groundwater monitoring wells which were completed during the month of September. Sampling results included the following above ADEC cleanup levels: MW-5R had GRO 5.05 ppm, DRO 2.18 ppm, and benzene at 0.0228 ppm. MW-9: DRO 5.13 ppm and benzene at 0.0240 ppm. MW-10: all below ADEC cleanup levels and MW-11: GRO 15.1 ppm, DRO 37.5 ppm, benzene 0.321 ppm.

Deborah Williams

12/12/2008

Update or Other Action

ADEC received Monitoring Well Installation Report for the Eielson Take-Off Pad. On September 29, 2008, and monitoring well was installed downgradient (north) of MW-9. The well boring was installed to 3 feet below the groundwater. The screened interval of the monitoring well was 8 to 13 feet bgs. Groundwater samples were collected from MW-12 on September 30, 2008. The groundwater sample was analyzed for GRO, DRO, and BTEX. One groundwater sample and a duplicate were taken from MW-12. The RPD for the sample was not less than 30% for the duplicate. Sample results were ND to 8.53 mg/L for DRO and up to 16.5 ug/L benzene.

Deborah Williams

10/16/2009

Update or Other Action

ADEC received the 2009 Summer Sampling Report for the Eielson Take-Off Pad site. The field activities for the 2009-Summer sampling event included sampling of six groundwater monitoring wells which were completed during the month of August. Sampling results included the following above ADEC cleanup levels: MW-5R had GRO 3.34ppm. MW-9: benzene at 0.0135 ppm. MW-10: DRO at 7.00 ppm and Benzene at .0297 ppm and MW-11: GRO 24.8 ppm, DRO 74.8 ppm, benzene 0.784 ppm, Touluene at 1.34ppm. MW12 had Benzene at .0126. Analysis of historical trends shows that overall contaminants are decreasing from historical ranges in most areas of the site except for what appears to be an increasing 4 year GRO and Benzene trend in MW11. No free product was detected at the site in the monitoring wells.

Fred Vreeman

3/3/2011

Document, Report, or Work plan Review - other

Contaminated Sites staff approved a work plan for groundwater monitoring at the Eielson Take-Off Pad site located on Eielson Air Force Base at Milepost 26.87/26.88 of the Eielson Pipeline. The pad and contaminated soil were excavated in 2004 but subsequent soil and groundwater monitoring has identified concentrations of diesel range organics (DRO), gasoline range organics (GRO), benzene and toluene above cleanup levels. During the 2011 sampling event eight previously-installed monitoring wells will be sampled for DRO, GRO and benzene, toluene, ethylbenzene and xylenes (BTEX). Results will be used to assess changes over time.

Kathleen Beutel

7/18/2011

Site Visit

Contaminated Sites staff participated in a site visit. Nearly all monitoring wells are severely frost-jacked. Several new wells will be installed in 2012.

Kathleen Beutel

7/18/2011

Site Visit

Contaminated Sites staff participated in a site visit. Nearly all monitoring wells are severely frost-jacked. Several new wells will be installed in 2012.

Kim DeRuyter

7/19/2011

Meeting or Teleconference Held

Contaminated Sites (CS) and DLA staff participated in a meeting to discuss three sites: Moose Creek, Manchu Road and the Eielson Take-Off Pad. CS and DLA staff discussed funding, plans for 2012 and the need to move these sites toward closure. No groundwater monitoring will be conducted at the Take-Off Pad in 2011; instead, a more comprehensive plan that will include replacement of frost-jacked wells, sampling for additional contaminants of potential concern and an effort to bound the dissolved-phase plume will be submitted in early 2012. All parties agreed that signed decision documents (DDs) will provide a clear path forward and possibly ease challenges in obtaining funding. It is anticipated that DDs for Manchu Road and the Take-Off Pad will be prepared within the next year and a DD for Moose Creek will be prepared within the next two years.

Kathleen Beutel

7/19/2011

Meeting or Teleconference Held

Kim DeRuyter

8/11/2011

Update or Other Action

Contaminated Sites staff approved deferral of groundwater sampling until 2012. Four of the seven monitoring wells are frost-jacked and require decommissioning and replacement. Deferring sampling will allow time to assess optimal locations for replacement wells and to develop a comprehensive plan for this site. DLA will submit a work plan prior to the 2012 field season.

Kathleen Beutel

2/23/2012

Site Characterization Workplan Approved

Contaminated Sites staff approved the Fiscal year 2012 Work Plan, which describes installation of ten temporary well points and six monitoring wells, surface water and soil sampling, and collection of groundwater flow and monitored natual attenuation parameters.

Kathleen Beutel

4/30/2014

Document, Report, or Work plan Review - other

Final 2013 Groundwater Monitoring Report at Eielson Take-Off Pad SS67 received April, 2014. Of these ten wells, three showed exceedances for benzene, two for diesel–range organics, and one for gasoline range organics. MW-11 showed the highest exceedances, with GRO at 5.67 mg/L, DRO at 4.09 mg/L, and benzene at 0.22 mg/L. Trend analysis indicates that contaminant levels are generally stable or decreasing.

Anna Iverson

1/30/2015

Document, Report, or Work plan Review - other

Final 2014 Groundwater Monitoring Report at Eielson Take-Off Pad SS67 received January 2015. Results from the analytical sampling showed that levels of petroleum compounds in groundwater continue to exceed cleanup levels. Historically, several monitoring wells have consistently shown exceedances of GRO, DRO, and benzene. In 2014, the only exceedances were for benzene, in wells MW-11 and MW-12. It should be noted that 2014 had unusually high groundwater levels, possibly resulting in dilution and temporarily reduced contaminant levels in monitoring wells.

Anna Iverson

4/4/2016

Update or Other Action

PAH information is summarized below for the forthcoming decision document. Information is taken from the EIELSON TAKE-OFF PAD SITE CHARACTERIZATION AND MONITORING FY2012 Final Report. Table 8 covers soil samples. Table 9 covers groundwater samples. Soil: of the 16 PAHs reported, 15 did not exceed 2016 proposed values. Only naphthalene exceed 2016 proposed value of .0381 mg/kg, in SB-09 (.022 mg/kg), SB-17 (.063 mg/kg) , SB-18 (3.6 mg/kg), SB-19 (.36 mg/kg), SB-25 (.46 mg/kg), and SB-26 (.058/.11 mg/kg JD-flagged). Groundwater:

Eric Breitenberger

10/5/2016

Document, Report, or Work plan Review - other

Final Eielson Take Off Pad, Eielson Air Force Base, Alaska Monitoring Well Decommissioning, Installation, and Groundwater Monitoring Work Plan was received September 2016. The work plan was for decommissioning monitoring wells: MW-13, MW-14, MW-15 and MW-17, installing monitoring wells to replace any frostjacked monitoring wells, if any require it, and completing one groundwater monitoring event for monitoring wells (MW-10, MW-11, MW-12, MW-16, MW-18 and MW-19).

Eric Breitenberger

4/18/2017

Document, Report, or Work plan Review - other

Final Eielson Take-Off Pad Monitoring Well Installation, Decommissioning, and Groundwater Monitoring Report received April 18, 2017. The report describes the 2016 field activities for decommissioning monitoring wells; MW-13, MW-14, MW-15, MW-17 and MW-18, installing monitoring well MW-18R to replace MW-18 and sample for contaminants of concern at MW-10, MW-11, MW-12, MW-16, MW-18R and MW-19. At MW-11, GRO, DRO, benzene and ethylbenzene exceeded ADEC cleanup levels. Benzene also exceeded cleanup levels at MW-12 and MW-18R. In accordance with the Decision Document dated January 21, 2016, a monitoring frequency of every 3 years will be established until all COC levels are below cleanup levels for two consecutive events. The next groundwater sampling event is scheduled for 2019.

Erica Blake

5/22/2018

Update or Other Action

DEC received a 2017 site inspection report for the Eielson Take-off Pad (ETOP) site from the Defense Logistics Agency (DLA). DLA inspected the site on August 9, 2017. No individuals were on site during the inspection, no structures were observed, no apparent change of land use, and no other work going at Eielson Air Force Base has impacted this release site. The monitoring wells were inspected for signs of frost jacking, damage, or any other changes that could influence the groundwater. At the time of the 2017 site inspection, no maintenance was required. The next site visit will be conducted in 2018. During this site visit the monitoring wells will be unlocked and opened to see if any well repairs will be required prior to the 2019 groundwater sampling event.

Erica Blake

6/28/2018

Site Visit

DEC conducted a site visit with Defense Logistics Agency (DLA) staff. DEC and DLA walked the site to inspect the monitoring wells. Everything was observed to be in good condition.

Erica Blake

1/15/2019

Update or Other Action

DEC received a 2018 site inspection report for the Eielson Take-off Pad (ETOP) site from the Defense Logistics Agency (DLA). DLA inspected the site on June 27, 2018. No individuals were on site during the inspection, no structures were observed, no apparent change of land use, and no other work going at Eielson Air Force Base has impacted this release site. The monitoring wells were inspected for signs of frost jacking, damage, or any other changes that could influence the groundwater. At the time of the 2018 site inspection, no maintenance was required. Wells that the DLA PM could open were checked for any damages. The next site inspection will be conducted in 2020 and groundwater monitoring will take place in 2019.

Bri Clark

8/2/2019

Update or Other Action

Dec received and commented on "Decision Document Eielson Take-Off Pad - Eielson Air Force Base, Alaska" dated May 9, 2019. The Decision Document presented a remedy to address petroleum hydrocarbon contamination in soil and groundwater at the Take-Off Pad site.

Sara Marshall

8/26/2019

Document, Report, or Work plan Review - other

DEC provided comments for the Draft Eielson Take-Off Pad, Eielson Air Force Base, Alaska Monitoring Well Decommissioning and Installation, and Groundwater Monitoring Work Plan, July, 2019. The work plan provided information on the decommissioning of MW-16 and installation of MW-16R. Groundwater monitoring and sampling activities will take place at MW-10, MW- 11, MW-12, MW-16R, MW-18R, and MW-19. The groundwater samples be analyzed for GRO/DRO/RRO, and BTEX.

Sara Marshall

9/20/2019

Institutional Control Periodic Reporting

DEC received the final Eielson Take-Off Pad, Eielson Air Force Base, Alaska Monitoring Well Decommissioning and Installation, and Groundwater Monitoring Work Plan, July, 2019. The work plan described monitoring well decommissioning and installation activities as well as sampling and analysis plans to take place during the fall 2019 field season.

Sara Marshall

4/23/2021

Meeting or Teleconference Held

DEC and Defense Logistic Agency PM had a meeting to discuss the current status of DLA sites. Current and expected documents regarding the sites were discussed. The status of clean-up efforts and monitoring at sites was also discussed.

Axl LeVan

7/23/2021

Site Visit

DEC conducted a site visit with Defense Logistics Agency (DLA) staff. DEC and DLA walked the site to inspect the monitoring wells. Two of the wells on the site were frostjacked. MW18R had slight frostjacking and still is locked. MW16R is highly frostjacked and no longer capped. DLA will be replacing MW16R before the next sampling event.

Axl LeVan

9/6/2022

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (DEC) has completed a review of the "Draft Eielson Take-Off Pad, 2022 Groundwater Monitoring Work Plan, Eielson Air Force Base, Alaska, September 2022" submitted by Defense Logistics Agency - Energy on September 2, 2022. DEC submitted comments for the document on September 6, 2022. The planned 2022 field activities will include groundwater monitoring and collection of groundwater samples for chemical analysis. Groundwater monitoring and sampling activities will be conducted at six wells: MW-10, MW-11, MW-12, MW-16R, MW-18R, and MW-19. Groundwater samples will be submitted for analyses for Site contaminants of concern. Well replacement and decommissioning is planned for up to three monitoring wells, depending on funding and the success of well repair attempts.

Axl LeVan

9/28/2022

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (DEC) has completed a review and approved the "Final Eielson Take-Off Pad, 2022 Groundwater Monitoring Work Plan, Eielson Air Force Base, Alaska, September 2022" submitted by Defense Logistics Agency - Energy on September 28, 2022. The planned 2022 field activities will include groundwater monitoring and collection of groundwater samples for chemical analysis. Groundwater monitoring and sampling activities will be conducted at six wells: MW-10, MW-11, MW-12, MW-16R, MW-18R, and MW-19. Groundwater samples will be submitted for analyses for Site contaminants of concern. Well replacement and decommissioning is planned for up to three monitoring wells, depending on funding and the success of well repair attempts.

Axl LeVan

6/12/2023

Document, Report, or Work plan Review - other

DEC reviewed and provided comments for the "Draft Eielson Take-Off Pad, 2022 Groundwater Monitoring Report, June 2023". The report documents well repairs and long-term monitoring at the site.

Axl LeVan

7/21/2023

Document, Report, or Work plan Review - other

DEC reviewed and approved the "Final Eielson Take-Off Pad, 2022 Groundwater Monitoring Report, July 2023". The report documents well repairs and long-term monitoring at the site.

Axl LeVan

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

There are no documents for this site report.

Hazard ID	Site Name	File Number
341	Eielson AFB (OU-2)(SER-1) (ST015) Fuel Line	107.38.038

Hazard ID

Site Name

File Number

341

Eielson AFB (OU-2)(SER-1) (ST015) Fuel Line

107.38.038

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.

Continue Close

Site Report: Eielson Take Off Pad Mapco Tie-in DESC

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Missing Location Data

State of Alaska Department of Environmental Conservation