Site Report: Eielson AFB (OU-2) ST10 E-2

Site Name:	Eielson AFB (OU-2) ST10 E-2
Address:	POL Storage, Eielson AFB, AK 99702
File Number:	107.38.064
Hazard ID:	336
Status:	Active
Staff:	Axl LeVan, 9074512156 axl.levan@alaska.gov
Latitude:	64.659718
Longitude:	-147.056196
Horizontal Datum:

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

BACKGROUND ST10 (DEC file 107.38.064/Hazard ID 336) and ST14 (DEC file 107.38.065/Hazard 340) are managed together. ST10 includes Spruce Lake and the E-2 POL storage area. SS14 includes the refueling area located east of the railroad tracks. ST10 and SS14 are located along Quarry Road in the SE part of the base. Combined area is approximately 10 acres. Groundwater is 4-7 feet below ground surface. The general groundwater gradient is NW. Groundwater from SS14 flows NW and then N into the lake. RELEASES The E-2 POL storage area contained six 672,000 gallon ASTs that stored JP-4, JP-8 and leaded fuels. There was a significant spill (quantity unknown) within the diked area surrounding AST 6236 in 1967 and a 1,400 gallon spill at Building 6231 in 1999. A sheen was observed on the surface of Spruce Lake (formerly known as Hardfill Lake) from at least 1978 until 1982. Suspected releases at SS14 include leaks from fuel lines and spills during unloading and refueling operations. REMEDIATION A bioventing system was constructed at ST10/SS14 during the 1995 field season. In 1996 a soil vapor extraction (SVE) system was installed around Building 6225 due to hydrocarbon vapors inside the building that likely were a result of bioventing. The ASTs were replaced with a 4,200,000-gallon AST in 2002. The bioventing system was redesigned and expanded in 2004. The ST10/SS14 bioventing system and SVE system at Building 6225 ceased operation in 2008. MOST RECENT ACTIONS The most recent groundwater monitoring in 2007 detected benzene concentrations up to 67 ug/L. Additional site characterization is scheduled for 2011. Proposed COCs (Soil): DRO GRO Benzene 1,2 Dichloroethane EDB Ethylbenzene PCE TCE 1,2,4-TMB 1,3,5-TMB Toluene Xylenes Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Dibenzo(a,h)anthracene Indeno(1,2,3-cd)pyrene 1-Methylnaphthalene 2-Methylnaphthalene Naphthalene Phenanthrene Proposed COCs(Groundwater): DRO GRO RRO Benzene 1,2-Dichloroethane EDB Ethylbenzene 1,2,4-TMB 1,3,5-TMB Toluene Xylenes Benzo(a)pyrene 1-Methylnaphthalene 2-Methylnaphthalene Naphthalene Lead Arsenic

Action Information

Action Date	Action	Description	DEC Staff
1/15/1992	Site Added to Database	This site is included in the state EPA Eielson FFA 100.38.011.	Former Staff
7/23/1992	Update or Other Action	(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Draft remedial investigation and baseline risk assessment received.	Former Staff
7/29/1992	Update or Other Action	Storage area has AVGAS and 2 storage tanks (20/21) reportedly leak MOGAS at a rate of approximately 200 gpd for an undetermined period of time.	Former Staff
8/20/1992	Update or Other Action	(Old R:Base Action Code = CORR - Correspondence (General)). 20 day extension requested.	Former Staff
9/16/1992	Meeting or Teleconference Held	Conference call regarding Draft RI between Project Manager.	Former Staff
9/30/1992	Update or Other Action	(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Response sent regarding remedial investigation and baseline risk assessment.	Former Staff
2/23/1993	Update or Other Action	(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS database Notification Letter to RP requesting update and more environmental information concerning contaminated site. Department of the Air Force responded with update of requested site information on 3-17-93.	Jeff Peterson
5/6/1993	Site Characterization Report Approved	(Old R:Base Action Code = FS - Feasibility Study (General)). Received draft FS from EAFB. The 3 volume document contains the FS and also includes Remedial Investigation and 02 appendices.	Former Staff
5/6/1993	Update or Other Action	(Old R:Base Action Code = RI - Remedial Investigation). Received draft RI from EAFB. The 3 volume document contains the RI and also includes Feasibility study and 02 appendices.	Former Staff
10/19/1993	Site Ranked Using the AHRM	Initial ranking.	Dennis Harwood
9/30/1994	Institutional Control Record Established	When the OU-2 ROD was signed in 1994, it established institutional controls for this site. These ICs include: a prohibition on the installation or use of drinking water wells, a requirement that all monitoring wells are secured with locks, any activity that may result in exposure to contam. g.w. or moving contam. g.w. requires approval of CES/CEV, any activity disturbing a remedial action requires approval of CES/CEV, any activity that may result in exposure to or removal of contam. soil requires approval of CES/CEV, if contam soil or g.w.. are removed from the source, they must be disposed of or treated in accordance with regulation, and a requirement to notify ADEC and EPA of any proposal to change the existing land use or land use controls at the site.	Ann Farris
8/1/1996	Update or Other Action	Work Plan for Utilidor Investigation/Treatability Study, Contract Number DACA85-94-D-0011, Delivery Order Number 0009, Submittal 001-Draft, 8/16/1996.	Kalu Kalu
8/1/1996	Update or Other Action	(Old R:Base Action Code = RD - Remedial Design). Amendment 002, Site Health and Safety Plan, Remedial Design for OU-2, Sites ST10/SS14 and ST13/DP26, Utilidor Investigation/Treatability Study, Contract DACA85-94-D0011, Delivery Orders 0007 and 0009, received 8/16/1996.	Kalu Kalu
9/24/1996	Record of Decision	Final Site-Wide Record of Decision, September 1, 1996, Environmental Restoration Program.	Rielle Markey
3/24/1997	Update or Other Action	Site updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 5/5/95.	S&W
6/29/2001	Update or Other Action	Staff received call from AF personnel that a contractor has designed a fire suppression system for the AST at ST-10, which includes a well placed near the dissolved phase plume. Staff working with the contractor to decide where there may be a suitable new location.	Ann Farris
12/19/2001	Update or Other Action	ADEC signed a memorandum agreeing to the placement of the Fire Suppression Well 100 feet upgradient from the 5 ppb benzene limit of the plume. There will be a pump test once the well is installed to field verify the drawdown calculations. Also if there are ever any contaminants found in the well, use of the well will be stopped until alterations can be made to the fire suppression system. EPA still needs to sign the memo, but the Air Force has already signed.	Ann Farris
12/20/2001	Cleanup Plan Approved	Site is undergoing active remediation via bioventing. The system was designed primarily to treat the soil by increasing biodegradation and has been operating since 1997. There is also a SVE system at this site to protect the indoor air quality of the building on site. This must remain operating as long as bioventing is occurring.	Ann Farris
12/26/2001	GIS Position Updated	Worked with Heather Goldman obtaining GIS latitude and longitude from 1:63,300 topographic map.	Heather Goldman
1/1/2003	Update or Other Action	Staff reviewed the historical data for this site. A 4,200,000 gallon AST was constructed in 2002 to replace 5 demolished tanks. Contamination includes BTEX and lead along the southern side of the lake. Supposedly, 2 separate NAPL plumes intersected at Spruce Lake, found int eh 1992 investigation. The estimated total volume of NAPL was 48,000 gallons. Six product recovery wells were installed in 1995 at ST10/SS14. 260 gallons of NAPL were recovered by 1998 mostly from well 10RW02, product recovery stopped in 1998. NAPL was still present in 2002 in four wells. Respiration test data was examined during the 2003 ROD Review to estimate that approximately 10,300 gallons of fuel had biodegraded between 1997 and 2003. The average biodegradation rate had decreased from 1.04 mg/kg-day in 1997 to 0.55 mg/kg-day in 2001, thought to be due to damaged bioventing equipment. Ground-water monitoring results still show exceedences of BTEX and lead as of 2002.	Emily Youcha
1/21/2003	Update or Other Action	Site is still undergoing active bioventing. The 5-year review is scheduled in 2003 to evaluate cleanup progress.	Ann Farris
2/11/2003	Update or Other Action	Staff approved a work plan for Eielson Air Force base to discharge water to land surface from the fire suppression well. The well is to be installed on March 3 or 4, with development and the associated pump test to be conducted immediately following installation.	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
9/19/2003	Long Term Monitoring Established	This site is included in the Sitewide Monitoring Program. Site is monitored in conjunction with site SS14. Next monitoring events are 2005 and 2007.	Emily Youcha
1/9/2004	Update or Other Action	Staff is reviewing the draft final Five-Year Review for Eielson Air Force Base. The majority of ADEC’s comments on the original draft document have been addressed. There are a few items that are still not satisfactory, but staff expects to get resolution on these items in the next week and have a document ready for signature by the end of the month.	Ann Farris
5/20/2004	Meeting or Teleconference Held	Staff participated in a teleconference with Eielson Air Force Base regarding their plans for this field season and the polychlorinated biphenyls (PCBs) in Garrison slough. In 2004, they plan to upgrade the bioventing system at the ST10/SS14 tank farm site and do further delineation at the ST13/DP26 hazmat facility. Additionally, they will continue with the sitewide monitoring program. The results from the fish tissue sampling in Garrison Slough indicates that the fish are still accumulating unacceptable levels of PCBs. The Air Force agreed to complete a limited feasibility study in 2004 to evaluate further remedial alternatives for this site.	Ann Farris
6/24/2005	Update or Other Action	In 2005, the bioventing system was redesigned and expanded based on new plume delineation data. Additionally, many air injections points were replaced. Operation and maintenance checks and respiration testing will be performed on the bioventing system and the soil vapor extraction (SVE) system. Samples will be collected from the SVE exhaust, along with air samples within Building 6225.	Emily Youcha
6/24/2005	Update or Other Action	Staff received the 2005 sitewide monitoring workplan. Eight monitoring wells will be sampled to monitor source area and downgradient BTEX and lead concentrations. Approximately 4 new wells may be installed at this site. ADEC does not concur with the use of temporary wells for long-term monitoring purposes unless it can be shown that the data is representative year after year.	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
3/22/2006	Update or Other Action	Staff reviewed the 2005 sitewide monitoring report which included ground-water monitoring at site ST10/SS14. 14 wells were monitored, six of which are permanent wells, the rest are temporary push wells. This year they installed temporary push wells immediately adjacent to last years push wells. Several of the wells had similar contaminant concentrations, but there were a few differences. The differences in some of the temporary push well data from 2003 to 2005 can be explained by multiple factors including heterogeneity within the aquifer due to differing sampling locations (variable concentrations within the plume), sampling errors, and changes in concentration with time. The differences could be decreases in concentration due to attenuation of the contaminant or increases in concentration due to plume instability. The difficulty with using new temporary wells for each sampling event to evaluate long-term monitoring trends is factoring out the many uncertainties. Concentrations are still significantly above cleanup levels for BTEX and lead. This site is actively remediated with a bioventing system.	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
8/16/2006	Update or Other Action	Contaminated Sites staff received a request to treat investigative derived waste from two sites at Eielson Air Force Base consisting of trichloroethylene and petroleum with lead contaminated ground water at Organic Incineration Technologies (OIT). Staff consulted with Doug Bauer who indicated that it may be possible to treat low concentrations of chlorinated solvents, but the water is sprayed on soil from other facilities and Eielson could be held partly responsible for all the contamination if the soil treatment fails and/or OIT goes out of business. Staff recommended taking water with hazardous substances to Eielson's hazardous waste accumulation point for offsite disposal or to an approved facility.	Emily Youcha
10/6/2006	Update or Other Action	Contaminated Sites staff approved the transport and treatment of stockpiled petroleum-contaminated soil from Eielson Air Force Base sites ST20 Refueling Area and ST10 Fuel Tanks. The soil was stockpiled for at least four years at the Eielson landfill and funding was recently obtained for treatment at OIT. (Youcha)	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
10/22/2007	Exposure Tracking Model Ranking	Initial ranking 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
2/3/2011	Meeting or Teleconference Held	Contaminated Sites staff met with representatives from Eielson AFB, Eielson's contractor, EPA and EPA's contractor to discuss Installation Restoration Program sites ST10/SS14 and ST13/DP26. GIS maps and site summaries were used to review historical information and identify data gaps, primarily pertaining to questions about whether soil contamination is still contributing to benzene contamination in the groundwater. Eielson personnel agreed to provide the Remedial Investigation/Feasibility Study (RI/FS) as well as any tank removal reports that can be located so that informed decisions can be made regarding future actions at these sites. A follow-up meeting was scheduled for next week.	Kathleen Beutel
4/8/2011	Meeting or Teleconference Held	A site scoping meeting for ST10/SS14 was held. Eielson's contractors created an annotated map and technical memorandum that summarized historic data, identified data gaps and described proposed field activities, including aquifer evaluation, soil borings and groundwater monitoring. A work plan for ST10/SS14 will be included in the basewide UFP-QAPP to be submitted 22 July 2011.	Kathleen Beutel
6/14/2011	Site Visit	Contaminated Sites staff participated in an all-day site visit that included LF03/FT09, ST10/SS14, DP25, ST27, SS35, SS37 and the stockpile containment area. Drums were seen in and adjacent to the pond at SS35 and both petroleum and biogenic sheens were observed on the surface of the pond. All stockpiles in the containment area were covered but two stockpiles were not labeled and from unknown locations.	Kathleen Beutel
5/7/2013	Site Visit	Site visit conducted in preparation for the FYR. Contaminated soil was removed between SS14 and ST10 last year in preparation for the rail line upgrade, materials were staged and late season snow was being removed in preparation for this seasons continued work on that project.	Kim DeRuyter
1/30/2014	Conceptual Site Model Submitted	The AF submitted Conceptual Site Model Update (Draft) for sites ST10/SS14. Received 1/30/14. Due to close proximity of sites ST10/SS14 are contained in one report. Soil, groundwater, and surface water were sampled and analyzed for DRO, GRO, RRO, EDB, lead and VOCs, additionally there was a geophysical investigation at the Source Areas. Soil samples exceed screening levels for GRO, DRO, and VOCs in multiple samples, lead and RRO were not detected above screening levels for all samples. Surface water samples exceeding ADEC screening levels in 1 of the two samples for both aqueous and aromatic hydrocarbons. Groundwater samples exceeded levels in 5 out of 12 samples for GRO, DRO and/or RRO and 2 out of 12 for Benzene, toluene and/or EDB.	Anna Iverson
2/11/2014	Document, Report, or Work plan Review - other	2012-Final installation-wide monitoring program (IWMP) report received June, 24 2013. During the 2012 season eight monitoring wells were installed at ST10/SS14. Two wells replaced historic wells that had been decommissioned and six were installed in new locations. Groundwater samples were analyzed and 2 COCs (Contaminant of concern) Benzene (6 wells) and Lead (1 well) exceeded the final remediation goal of the site. 2 COPC (Contaminant of potential concern) Petroleum Hydrocarbons-GRO (4 wells) DRO (3 wells) and VOCs (Volatile organic compound) - EDB (2 wells) were detected in levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. Pesticides, PCBS, and arsenic have the potential to impact groundwater at this source area, but were not included in the 2012 monitoring event. Based on the comparison between the 2012 and historical concentrations and plume extents, groundwater impacts from contaminates of concern have decreased, indicating a general decline in plume mass. Moreover, comparison of the historic plume traces with the 2012 extent of contamination indicates the plumes are shrinking.	Anna Iverson
5/1/2014	Document, Report, or Work plan Review - other	2013-Draft installation-wide monitoring program (IWMP) report received March, 26 2014. 19 monitoring wells are located in the source areas ST10/SS14, 17 were sampled in the spring and 19 were sampled in the fall. 2 COCs exceeded the ROD FRGs, Benzene (1 well spring, 3 wells fall, and 2 wells both sampling events) and Lead (2 wells spring, 1 well both sampling events). 3 COPCs exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels for GRO (1 well spring, 3 Spring & Fall), DRO (1 Spring, 1 Spring & Fall), EDB (2 wells Spring & Fall). Benzene and Lead are both showing an overall decrease in concentration. The other COCs at the site toluene, 2-methylnaphthalene, and naphthalene showed no concentrations above FRGs in any sampling wells.	Anna Iverson
6/10/2015	Site Characterization Workplan Approved	Approval issued for the "Final Workplan for Additional Well Installations, Eielson Air Force Base, Alaska" dated 26 May 2015. The workplan describes the installation of 20 new monitoring wells at ten source areas (i.e. ST10/SS14, ST13/DP26, ST18, ST19, DP44, SS61, SS37, ST58, LF04, and SS534)across Eielson, as well as the redevelopment of drinking water well NWS56WH at Source Area ST56 (Engineer Hill).	Melinda Brunner
3/23/2016	Update or Other Action	DEC and EPA reviewed the "Draft Remedial Investigation/Feasibility Study Management Plan for Operable Unit 2 Source Areas, Eielson Air Force Base, Alaska" dated February 2016 (OU2 RI/FS MP) and provided joint comments to the U.S. Air Force. The RI/FS MP provides an overview of the activities associated with the investigation and evaluation of the 27 source areas at Eielson Air Force Base. ST010 is included in the RI/FS MP.	Melinda Brunner
7/22/2016	Institutional Control Compliance Review	DEC and EPA Approved the Final 2016 Installation-Wide Monitoring Program Quality Assurance Project Plan Addendum No. 5. The IWMP QAPP Add. 5 updates the 2012 IWMP QAPP for the 2016 field season. Changes and additions to the existing network of monitoring wells were described.	Monte Garroutte
12/22/2016	Update or Other Action	DEC approved the Remedial Investigation / Feasibility Study Management Plan for Operable Unit 2 Source Areas, Eielson Air Force Base, Alaska (November, 2016). This applies to 7 source areas inside OU2 and 21 source areas outside of OU2.	John O'Brien
12/23/2016	Document, Report, or Work plan Review - other	DEC and EPA approved the OU2 RI/FS Management Plan. The RI/FS MP provides an overview of the activities associated with the investigation and evaluation of the 27 source areas (not including Garrison Slough) contained in the ROD that includes seven source areas in OU2 and 21 source areas outside of OU2.	Monte Garroutte
4/25/2017	Update or Other Action	DEC reviewed and provided comments on the Draft Programmatic Quality Assurance Project Plan, Addendum No. 2, Eielson Air Force Base, Alaska (March, 2017).	John O'Brien
6/9/2017	Document, Report, or Work plan Review - other	DEC Approved the 2017 Field Sampling Plan, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska.	John O'Brien
7/18/2017	Document, Report, or Work plan Review - other	DEC reviewed and provided comments on the Installation-Wide Monitoring Program, 2016 Groundwater Monitoring Report, Eielson Air Force Base, Alaska (June, 2017).	John O'Brien
8/6/2018	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
8/9/2018	Document, Report, or Work plan Review - other	DEC reviewed and provided a second round of comments on Explanation of Significant Differences (ESD) to the Records of Decisions for Eielson Air Force Base Operable Units, OU1, OU2, OU3,4,5, and OU6, dated November 2017.	Bri Clark
8/10/2018	Institutional Control Periodic Reporting	DEC and EPA reviewed the "Installation-Wide Monitoring Program 2017 Groundwater Monitoring Program" for Eielson Air Force Base, Alaska dated March 2018 and issued comments.	Bri Clark
12/19/2018	Document, Report, or Work plan Review - other	DEC reviewed and provided comments on the "Draft Installation-Wide Monitoring Program Quality Assurance Project Plan, Addendum No. 8, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska," dated November 2018.	Bri Clark
2/13/2019	Institutional Control Periodic Reporting	DEC and EPA approved the Installation-Wide Monitoring Program 2017 Groundwater Monitoring Report, Eielson Air Force Base, Alaska, dated January 2019.	Bri Clark
3/4/2019	Institutional Control Periodic Reporting	DEC issued comments on the Draft Installation-Wide Monitoring Program 2018 Groundwater Monitoring Report, Eielson Air Force Base, Alaska, dated January 2019. This report describes the groundwater monitoring activities conducted installation-wide in 2018.	Bri Clark
8/23/2019	Site Characterization Report Approved	DEC Approved the Final Site Characterization Report II, Source areas ST010/SS014, SS012, ST013/DP026, ST015, ST016, ST018, ST019, ST020, WP038, SS039/SS063, SS047, ST048, SS050, SS051, SS052, SS053, AND DP054, Eielson Performance Based Remediation, Eielson AFB, Alaska, June 2019.	Dennis Shepard
9/30/2019	Document, Report, or Work plan Review - other	DEC issued comments on the "Draft Installation-Wide Monitoring Program Quality Assurance Project Plan, Addendum No. 9 Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska", dated August 2019. This program addendum updates the monitoring program originally designed in 2012.	Sara Marshall
2/25/2021	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 71315 E-2 POL storage area .	Axl LeVan
5/17/2022	Document, Report, or Work plan Review - other	DEC provided review comments for the Draft Work Plan, 2022 Installation-Wide Monitoring Program, Eielson AFB, Alaska, Revision 02, April 2022 Eielson Air Force Base, Alaska. Eleven monitoring wells are sampled semi-annually for site ST010.	Dennis Shepard

Action Date

Action

Description

DEC Staff

1/15/1992

Site Added to Database

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

Former Staff

7/23/1992

Update or Other Action

(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Draft remedial investigation and baseline risk assessment received.

Former Staff

7/29/1992

Update or Other Action

Storage area has AVGAS and 2 storage tanks (20/21) reportedly leak MOGAS at a rate of approximately 200 gpd for an undetermined period of time.

Former Staff

8/20/1992

Update or Other Action

(Old R:Base Action Code = CORR - Correspondence (General)). 20 day extension requested.

Former Staff

9/16/1992

Meeting or Teleconference Held

Conference call regarding Draft RI between Project Manager.

Former Staff

9/30/1992

Update or Other Action

(Old R:Base Action Code = DD - Decision Document (CERCLIS)). Response sent regarding remedial investigation and baseline risk assessment.

Former Staff

2/23/1993

Update or Other Action

(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS database Notification Letter to RP requesting update and more environmental information concerning contaminated site. Department of the Air Force responded with update of requested site information on 3-17-93.

Jeff Peterson

5/6/1993

Site Characterization Report Approved

(Old R:Base Action Code = FS - Feasibility Study (General)). Received draft FS from EAFB. The 3 volume document contains the FS and also includes Remedial Investigation and 02 appendices.

Former Staff

5/6/1993

Update or Other Action

(Old R:Base Action Code = RI - Remedial Investigation). Received draft RI from EAFB. The 3 volume document contains the RI and also includes Feasibility study and 02 appendices.

Former Staff

10/19/1993

Site Ranked Using the AHRM

Initial ranking.

Dennis Harwood

9/30/1994

Institutional Control Record Established

When the OU-2 ROD was signed in 1994, it established institutional controls for this site. These ICs include: a prohibition on the installation or use of drinking water wells, a requirement that all monitoring wells are secured with locks, any activity that may result in exposure to contam. g.w. or moving contam. g.w. requires approval of CES/CEV, any activity disturbing a remedial action requires approval of CES/CEV, any activity that may result in exposure to or removal of contam. soil requires approval of CES/CEV, if contam soil or g.w.. are removed from the source, they must be disposed of or treated in accordance with regulation, and a requirement to notify ADEC and EPA of any proposal to change the existing land use or land use controls at the site.

Ann Farris

8/1/1996

Update or Other Action

Work Plan for Utilidor Investigation/Treatability Study, Contract Number DACA85-94-D-0011, Delivery Order Number 0009, Submittal 001-Draft, 8/16/1996.

Kalu Kalu

8/1/1996

Update or Other Action

(Old R:Base Action Code = RD - Remedial Design). Amendment 002, Site Health and Safety Plan, Remedial Design for OU-2, Sites ST10/SS14 and ST13/DP26, Utilidor Investigation/Treatability Study, Contract DACA85-94-D0011, Delivery Orders 0007 and 0009, received 8/16/1996.

Kalu Kalu

9/24/1996

Record of Decision

Final Site-Wide Record of Decision, September 1, 1996, Environmental Restoration Program.

Rielle Markey

3/24/1997

Update or Other Action

Site updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 5/5/95.

S&W

6/29/2001

Update or Other Action

Staff received call from AF personnel that a contractor has designed a fire suppression system for the AST at ST-10, which includes a well placed near the dissolved phase plume. Staff working with the contractor to decide where there may be a suitable new location.

Ann Farris

12/19/2001

Update or Other Action

ADEC signed a memorandum agreeing to the placement of the Fire Suppression Well 100 feet upgradient from the 5 ppb benzene limit of the plume. There will be a pump test once the well is installed to field verify the drawdown calculations. Also if there are ever any contaminants found in the well, use of the well will be stopped until alterations can be made to the fire suppression system. EPA still needs to sign the memo, but the Air Force has already signed.

Ann Farris

12/20/2001

Cleanup Plan Approved

Site is undergoing active remediation via bioventing. The system was designed primarily to treat the soil by increasing biodegradation and has been operating since 1997. There is also a SVE system at this site to protect the indoor air quality of the building on site. This must remain operating as long as bioventing is occurring.

Ann Farris

12/26/2001

GIS Position Updated

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

Heather Goldman

1/1/2003

Update or Other Action

Staff reviewed the historical data for this site. A 4,200,000 gallon AST was constructed in 2002 to replace 5 demolished tanks. Contamination includes BTEX and lead along the southern side of the lake. Supposedly, 2 separate NAPL plumes intersected at Spruce Lake, found int eh 1992 investigation. The estimated total volume of NAPL was 48,000 gallons. Six product recovery wells were installed in 1995 at ST10/SS14. 260 gallons of NAPL were recovered by 1998 mostly from well 10RW02, product recovery stopped in 1998. NAPL was still present in 2002 in four wells. Respiration test data was examined during the 2003 ROD Review to estimate that approximately 10,300 gallons of fuel had biodegraded between 1997 and 2003. The average biodegradation rate had decreased from 1.04 mg/kg-day in 1997 to 0.55 mg/kg-day in 2001, thought to be due to damaged bioventing equipment. Ground-water monitoring results still show exceedences of BTEX and lead as of 2002.

Emily Youcha

1/21/2003

Update or Other Action

Site is still undergoing active bioventing. The 5-year review is scheduled in 2003 to evaluate cleanup progress.

Ann Farris

2/11/2003

Update or Other Action

Staff approved a work plan for Eielson Air Force base to discharge water to land surface from the fire suppression well. The well is to be installed on March 3 or 4, with development and the associated pump test to be conducted immediately following installation.

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

9/19/2003

Long Term Monitoring Established

This site is included in the Sitewide Monitoring Program. Site is monitored in conjunction with site SS14. Next monitoring events are 2005 and 2007.

Emily Youcha

1/9/2004

Update or Other Action

Staff is reviewing the draft final Five-Year Review for Eielson Air Force Base. The majority of ADEC’s comments on the original draft document have been addressed. There are a few items that are still not satisfactory, but staff expects to get resolution on these items in the next week and have a document ready for signature by the end of the month.

Ann Farris

5/20/2004

Meeting or Teleconference Held

Staff participated in a teleconference with Eielson Air Force Base regarding their plans for this field season and the polychlorinated biphenyls (PCBs) in Garrison slough. In 2004, they plan to upgrade the bioventing system at the ST10/SS14 tank farm site and do further delineation at the ST13/DP26 hazmat facility. Additionally, they will continue with the sitewide monitoring program. The results from the fish tissue sampling in Garrison Slough indicates that the fish are still accumulating unacceptable levels of PCBs. The Air Force agreed to complete a limited feasibility study in 2004 to evaluate further remedial alternatives for this site.

Ann Farris

6/24/2005

Update or Other Action

In 2005, the bioventing system was redesigned and expanded based on new plume delineation data. Additionally, many air injections points were replaced. Operation and maintenance checks and respiration testing will be performed on the bioventing system and the soil vapor extraction (SVE) system. Samples will be collected from the SVE exhaust, along with air samples within Building 6225.

Emily Youcha

6/24/2005

Update or Other Action

Staff received the 2005 sitewide monitoring workplan. Eight monitoring wells will be sampled to monitor source area and downgradient BTEX and lead concentrations. Approximately 4 new wells may be installed at this site. ADEC does not concur with the use of temporary wells for long-term monitoring purposes unless it can be shown that the data is representative year after year.

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

3/22/2006

Update or Other Action

Staff reviewed the 2005 sitewide monitoring report which included ground-water monitoring at site ST10/SS14. 14 wells were monitored, six of which are permanent wells, the rest are temporary push wells. This year they installed temporary push wells immediately adjacent to last years push wells. Several of the wells had similar contaminant concentrations, but there were a few differences. The differences in some of the temporary push well data from 2003 to 2005 can be explained by multiple factors including heterogeneity within the aquifer due to differing sampling locations (variable concentrations within the plume), sampling errors, and changes in concentration with time. The differences could be decreases in concentration due to attenuation of the contaminant or increases in concentration due to plume instability. The difficulty with using new temporary wells for each sampling event to evaluate long-term monitoring trends is factoring out the many uncertainties. Concentrations are still significantly above cleanup levels for BTEX and lead. This site is actively remediated with a bioventing system.

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

8/16/2006

Update or Other Action

Contaminated Sites staff received a request to treat investigative derived waste from two sites at Eielson Air Force Base consisting of trichloroethylene and petroleum with lead contaminated ground water at Organic Incineration Technologies (OIT). Staff consulted with Doug Bauer who indicated that it may be possible to treat low concentrations of chlorinated solvents, but the water is sprayed on soil from other facilities and Eielson could be held partly responsible for all the contamination if the soil treatment fails and/or OIT goes out of business. Staff recommended taking water with hazardous substances to Eielson's hazardous waste accumulation point for offsite disposal or to an approved facility.

Emily Youcha

10/6/2006

Update or Other Action

Contaminated Sites staff approved the transport and treatment of stockpiled petroleum-contaminated soil from Eielson Air Force Base sites ST20 Refueling Area and ST10 Fuel Tanks. The soil was stockpiled for at least four years at the Eielson landfill and funding was recently obtained for treatment at OIT. (Youcha)

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

10/22/2007

Exposure Tracking Model Ranking

Initial ranking 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

2/3/2011

Meeting or Teleconference Held

Contaminated Sites staff met with representatives from Eielson AFB, Eielson's contractor, EPA and EPA's contractor to discuss Installation Restoration Program sites ST10/SS14 and ST13/DP26. GIS maps and site summaries were used to review historical information and identify data gaps, primarily pertaining to questions about whether soil contamination is still contributing to benzene contamination in the groundwater. Eielson personnel agreed to provide the Remedial Investigation/Feasibility Study (RI/FS) as well as any tank removal reports that can be located so that informed decisions can be made regarding future actions at these sites. A follow-up meeting was scheduled for next week.

Kathleen Beutel

4/8/2011

Meeting or Teleconference Held

A site scoping meeting for ST10/SS14 was held. Eielson's contractors created an annotated map and technical memorandum that summarized historic data, identified data gaps and described proposed field activities, including aquifer evaluation, soil borings and groundwater monitoring. A work plan for ST10/SS14 will be included in the basewide UFP-QAPP to be submitted 22 July 2011.

Kathleen Beutel

6/14/2011

Site Visit

Contaminated Sites staff participated in an all-day site visit that included LF03/FT09, ST10/SS14, DP25, ST27, SS35, SS37 and the stockpile containment area. Drums were seen in and adjacent to the pond at SS35 and both petroleum and biogenic sheens were observed on the surface of the pond. All stockpiles in the containment area were covered but two stockpiles were not labeled and from unknown locations.

Kathleen Beutel

5/7/2013

Site Visit

Site visit conducted in preparation for the FYR. Contaminated soil was removed between SS14 and ST10 last year in preparation for the rail line upgrade, materials were staged and late season snow was being removed in preparation for this seasons continued work on that project.

Kim DeRuyter

1/30/2014

Conceptual Site Model Submitted

The AF submitted Conceptual Site Model Update (Draft) for sites ST10/SS14. Received 1/30/14. Due to close proximity of sites ST10/SS14 are contained in one report. Soil, groundwater, and surface water were sampled and analyzed for DRO, GRO, RRO, EDB, lead and VOCs, additionally there was a geophysical investigation at the Source Areas. Soil samples exceed screening levels for GRO, DRO, and VOCs in multiple samples, lead and RRO were not detected above screening levels for all samples. Surface water samples exceeding ADEC screening levels in 1 of the two samples for both aqueous and aromatic hydrocarbons. Groundwater samples exceeded levels in 5 out of 12 samples for GRO, DRO and/or RRO and 2 out of 12 for Benzene, toluene and/or EDB.

Anna Iverson

2/11/2014

Document, Report, or Work plan Review - other

2012-Final installation-wide monitoring program (IWMP) report received June, 24 2013. During the 2012 season eight monitoring wells were installed at ST10/SS14. Two wells replaced historic wells that had been decommissioned and six were installed in new locations. Groundwater samples were analyzed and 2 COCs (Contaminant of concern) Benzene (6 wells) and Lead (1 well) exceeded the final remediation goal of the site. 2 COPC (Contaminant of potential concern) Petroleum Hydrocarbons-GRO (4 wells) DRO (3 wells) and VOCs (Volatile organic compound) - EDB (2 wells) were detected in levels that exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels. Pesticides, PCBS, and arsenic have the potential to impact groundwater at this source area, but were not included in the 2012 monitoring event. Based on the comparison between the 2012 and historical concentrations and plume extents, groundwater impacts from contaminates of concern have decreased, indicating a general decline in plume mass. Moreover, comparison of the historic plume traces with the 2012 extent of contamination indicates the plumes are shrinking.

Anna Iverson

5/1/2014

Document, Report, or Work plan Review - other

2013-Draft installation-wide monitoring program (IWMP) report received March, 26 2014. 19 monitoring wells are located in the source areas ST10/SS14, 17 were sampled in the spring and 19 were sampled in the fall. 2 COCs exceeded the ROD FRGs, Benzene (1 well spring, 3 wells fall, and 2 wells both sampling events) and Lead (2 wells spring, 1 well both sampling events). 3 COPCs exceeded current MCL (Maximum contaminant level) or ADEC groundwater levels for GRO (1 well spring, 3 Spring & Fall), DRO (1 Spring, 1 Spring & Fall), EDB (2 wells Spring & Fall). Benzene and Lead are both showing an overall decrease in concentration. The other COCs at the site toluene, 2-methylnaphthalene, and naphthalene showed no concentrations above FRGs in any sampling wells.

Anna Iverson

6/10/2015

Site Characterization Workplan Approved

Approval issued for the "Final Workplan for Additional Well Installations, Eielson Air Force Base, Alaska" dated 26 May 2015. The workplan describes the installation of 20 new monitoring wells at ten source areas (i.e. ST10/SS14, ST13/DP26, ST18, ST19, DP44, SS61, SS37, ST58, LF04, and SS534)across Eielson, as well as the redevelopment of drinking water well NWS56WH at Source Area ST56 (Engineer Hill).

Melinda Brunner

3/23/2016

Update or Other Action

DEC and EPA reviewed the "Draft Remedial Investigation/Feasibility Study Management Plan for Operable Unit 2 Source Areas, Eielson Air Force Base, Alaska" dated February 2016 (OU2 RI/FS MP) and provided joint comments to the U.S. Air Force. The RI/FS MP provides an overview of the activities associated with the investigation and evaluation of the 27 source areas at Eielson Air Force Base. ST010 is included in the RI/FS MP.

Melinda Brunner

7/22/2016

Institutional Control Compliance Review

DEC and EPA Approved the Final 2016 Installation-Wide Monitoring Program Quality Assurance Project Plan Addendum No. 5. The IWMP QAPP Add. 5 updates the 2012 IWMP QAPP for the 2016 field season. Changes and additions to the existing network of monitoring wells were described.

Monte Garroutte

12/22/2016

Update or Other Action

DEC approved the Remedial Investigation / Feasibility Study Management Plan for Operable Unit 2 Source Areas, Eielson Air Force Base, Alaska (November, 2016). This applies to 7 source areas inside OU2 and 21 source areas outside of OU2.

John O'Brien

12/23/2016

Document, Report, or Work plan Review - other

DEC and EPA approved the OU2 RI/FS Management Plan. The RI/FS MP provides an overview of the activities associated with the investigation and evaluation of the 27 source areas (not including Garrison Slough) contained in the ROD that includes seven source areas in OU2 and 21 source areas outside of OU2.

Monte Garroutte

4/25/2017

Update or Other Action

DEC reviewed and provided comments on the Draft Programmatic Quality Assurance Project Plan, Addendum No. 2, Eielson Air Force Base, Alaska (March, 2017).

John O'Brien

6/9/2017

Document, Report, or Work plan Review - other

DEC Approved the 2017 Field Sampling Plan, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska.

John O'Brien

7/18/2017

Document, Report, or Work plan Review - other

DEC reviewed and provided comments on the Installation-Wide Monitoring Program, 2016 Groundwater Monitoring Report, Eielson Air Force Base, Alaska (June, 2017).

John O'Brien

8/6/2018

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

8/9/2018

Document, Report, or Work plan Review - other

DEC reviewed and provided a second round of comments on Explanation of Significant Differences (ESD) to the Records of Decisions for Eielson Air Force Base Operable Units, OU1, OU2, OU3,4,5, and OU6, dated November 2017.

Bri Clark

8/10/2018

Institutional Control Periodic Reporting

DEC and EPA reviewed the "Installation-Wide Monitoring Program 2017 Groundwater Monitoring Program" for Eielson Air Force Base, Alaska dated March 2018 and issued comments.

Bri Clark

12/19/2018

Document, Report, or Work plan Review - other

DEC reviewed and provided comments on the "Draft Installation-Wide Monitoring Program Quality Assurance Project Plan, Addendum No. 8, Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska," dated November 2018.

Bri Clark

2/13/2019

Institutional Control Periodic Reporting

DEC and EPA approved the Installation-Wide Monitoring Program 2017 Groundwater Monitoring Report, Eielson Air Force Base, Alaska, dated January 2019.

Bri Clark

3/4/2019

Institutional Control Periodic Reporting

DEC issued comments on the Draft Installation-Wide Monitoring Program 2018 Groundwater Monitoring Report, Eielson Air Force Base, Alaska, dated January 2019. This report describes the groundwater monitoring activities conducted installation-wide in 2018.

Bri Clark

8/23/2019

Site Characterization Report Approved

DEC Approved the Final Site Characterization Report II, Source areas ST010/SS014, SS012, ST013/DP026, ST015, ST016, ST018, ST019, ST020, WP038, SS039/SS063, SS047, ST048, SS050, SS051, SS052, SS053, AND DP054, Eielson Performance Based Remediation, Eielson AFB, Alaska, June 2019.

Dennis Shepard

9/30/2019

Document, Report, or Work plan Review - other

DEC issued comments on the "Draft Installation-Wide Monitoring Program Quality Assurance Project Plan, Addendum No. 9 Eielson Performance-Based Remediation, Eielson Air Force Base, Alaska", dated August 2019. This program addendum updates the monitoring program originally designed in 2012.

Sara Marshall

2/25/2021

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 71315 E-2 POL storage area .

Axl LeVan

5/17/2022

Document, Report, or Work plan Review - other

DEC provided review comments for the Draft Work Plan, 2022 Installation-Wide Monitoring Program, Eielson AFB, Alaska, Revision 02, April 2022 Eielson Air Force Base, Alaska. Eleven monitoring wells are sampled semi-annually for site ST010.

Dennis Shepard

Contaminant Information

Name	Level Description	Media
Benzene	Other	Soil
Lead - Total	> Table C	Groundwater
TPH	> Table C	Groundwater
Toluene	> Table C	Groundwater

Name

Level Description

Media

Comments

Benzene

Other

Soil

Lead - Total

> Table C

Groundwater

TPH

> Table C

Groundwater

Toluene

> Table C

Groundwater

Control Type

Type	Details
Interagency MOU	OU2 Record of Decision
Land Use Plan / Maps / Base Master Plan	Basewide IC Plan incorporated into the Base Comprehensive Plan.

Type

Details

Interagency MOU

OU2 Record of Decision

Land Use Plan / Maps / Base Master Plan

Basewide IC Plan incorporated into the Base Comprehensive Plan.

Requirements

Description	Details
Groundwater Use Restrictions	Prohibition on installation 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. Annual IC Report
Groundwater Monitoring	Site is included in the Sitewide Monitoring Program. A requirement that all monitoring wells are secured with locks. Sitewide Monitoring Program Report
New Construction Restrictions	Any activity disturbing a remedial action requires approval of 354 CES/CEV Annual IC Report
Excavation / Soil Movement Restrictions	Any activity that may result in exposure to or removal of contaminated soil requires approval of 354 CES/CEV Annual IC Report
Excavation / Soil Movement Restrictions	If contaminated soil or ground water are removed from the source, they must be disposed of or treated in accordance with regulation. 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. Notify ADEC and EPA

Description

Details

Groundwater Use Restrictions

Prohibition on installation 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. Annual IC Report

Groundwater Monitoring

Site is included in the Sitewide Monitoring Program. A requirement that all monitoring wells are secured with locks. Sitewide Monitoring Program Report

New Construction Restrictions

Any activity disturbing a remedial action requires approval of 354 CES/CEV Annual IC Report

Excavation / Soil Movement Restrictions

Any activity that may result in exposure to or removal of contaminated soil requires approval of 354 CES/CEV Annual IC Report

Excavation / Soil Movement Restrictions

If contaminated soil or ground water are removed from the source, they must be disposed of or treated in accordance with regulation. 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. Notify ADEC and EPA

There are no documents for this site report.

Hazard ID	Site Name	File Number
340	Eielson AFB (OU-2) SS014 E-2	107.38.065

Hazard ID

Site Name

File Number

340

Eielson AFB (OU-2) SS014 E-2

107.38.065

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

Alaska Department of Environmental Conservation

Site Report: Eielson AFB (OU-2) ST10 E-2

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