Site Report: Adak Tanker Shed UST 42494

Site Name:	Adak Tanker Shed UST 42494
Address:	OU A, Adak Naval Air Facility, Adak, AK 99546
File Number:	2501.38.003.07
Hazard ID:	2217
Status:	Active
Staff:	Jamie McKellar, 9074515175 jamie.mckellar@alaska.gov
Latitude:	51.872372
Longitude:	-176.643933
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

The land containing the Tanker Shed has been used for aviation related activities since the military arrived on Adak during WWII. The site contained an air transport depot and the base operations office of the 11th Air Force during the late 1940s. The Tanker Shed facility was used to perform maintenance on the tanker trucks that transported JP-5 fuel for the housing areas heating systems and for aircraft refueling. It is not known when the Tanker Shed was built, although aerial photographs indicate that it was sometime between 1985 and 1991. UST 42494 was installed sometime around 1985 and was used to collect used oil from the Tanker Shed Building and waste fluids associated with the vehicle wash rack following removal of water by an oil water separator. The tank was removed in 1995. The tank was overflowing, causing contamination of soil and groundwater. Free product recovery is ongoing. Site transferred to ADOT/PF in March of 2004; Navy is still RP. Free product recovery was selected for the site in the OU A ROD. The site was removed from the OU A ROD by the OU A ROD amendment for regulation under 18 AAC 75. Decision Document for Petroleum Sites with No Unacceptable Risks signed on May 20, 2005. 2005 groundwater monitoring data shows continuing DRO contamination at this site. Four of the five wells samples contained DRO contamination above clean-up levels. All wells but the downgradient well showed GRO contamination but only one (04-306) showed contamination above clean-up levels (1460ppb). Benzene was not detected in any well above clean-up levels. Due to the signing of the decision document for this site in 2005, this is the first time many of the wells have been sampled since their establishment. Therefore, statistical trends have not been established for all but two wells. Monitoring will be continued at 2005 levels in 2006.

Action Information

Action Date	Action	Description	DEC Staff
11/10/1994	Update or Other Action	(Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Notice of release received and ADEC response letter sent.	Scott Pexton
10/24/1995	Site Added to Database	DRO and benzene.	Scott Pexton
4/15/2000	Record of Decision	The Record of Decision for this site was signed this date.	Elim Yoon
12/28/2001	Institutional Control Record Established	Institutional Control Established. Includes Equitable Servitude for: Commercial/Industrial Land Use Restrictions, Excavation permit required for areas with Soil Excavation Restrictions, and requirements for Inspections and Reporting. See document “Adak Island Institutional Control Management Plan, Final Edition, December 2001, Prepared by: Engineering Field Activity, Northwest.”	Elim Yoon
3/1/2003	Update or Other Action	The Final 2001 Annual Groundwater Monitoring Report was received on this date. The Navy recommends continuing monitoring at the sentinel well.	Meghan Dooley
10/10/2003	Record of Decision	Site removed from OU A ROD by OU A ROD Amendment; will be regulated under 18 AAC 75.	Sami Goldman
6/17/2004	Update or Other Action	Comments for the 2003 Annual Groundwater Monitoring report were sent. General concerns include: the field team may not be familiar with the requirements in the CMP and SOP, and changes in ARARs.	Meghan Dooley
9/1/2004	Update or Other Action	Site is currently in proposed plan stages.	Jason Weigle
9/1/2004	Update or Other Action	Property transferred to ADOT/PF on March 17, 2004.	Jason Weigle
9/7/2004	Update or Other Action	The Final 2003 Annual Groundwater Monitoring Report was received. DRO and benzene were observed above endpoint criteria in 2002. The Navy recommends maintaining the current monitoring schedule.	Meghan Dooley
9/15/2004	Risk Assessment Report Approved	Risk Assessment approved as part of Focused Feasibility Study for Free-Product Sites Below Health Goals.	Jason Weigle
9/15/2004	Site Characterization Report Approved	Site characterization report approved as part of Focused Feasibility Study for Free-Product Sites Below Health Goals.	Jason Weigle
9/15/2004	Update or Other Action	Focused Feasibility Study Approved for this site.	Jason Weigle
10/19/2004	GIS Position Updated	Latitude and Longitude was derived using ArcGIS with either High Resolution Aerial Photography from the Navy with an up to 3 meters error, or line maps used in investigations combined with road layers, +/-25 feet accuracy. Metadata is as follows: Updated NAD 1983 State Plane Alaska 10 FIPS 5010 Feet; Projection: Lambert Conformal Conic; False Easting: 3280833.333333; False Northing: 0.000000; Central Meridian: -176.000000; Standard Parallel 1: 51.833333; Standard Parallel 2: 53.833333; Latitude of Origin: 51.000000; GCS North American 1983.	Jason Weigle
12/10/2004	Cleanup Level(s) Approved	10x Table C levels selected in Proposed Plan.	Jason Weigle
1/24/2005	Update or Other Action	Received copy of the Draft Decision Document for Petroleum Sites with No Unacceptable Risk for review.	Jason Weigle
2/8/2005	Update or Other Action	Risk assessments were used to justify remedial endpoints for active remediation, not final clean-up endpoints.	Jason Weigle
2/8/2005	Update or Other Action	Monitored natural attenuation and free product removal selected as remedies in Proposed Plan.	Jason Weigle
2/8/2005	Update or Other Action	Free product recovery was reinstituted at the site in August of 2004. Monitoring will continue through July of 2005.	Jason Weigle
2/9/2005	Update or Other Action	Interim conveyance document contains an equitable servitude that restricts residential land use as well as the domestic use of groundwater. Site is also located in the downtown excavation notification zone.	Jason Weigle
2/17/2005	Update or Other Action	2004 Annual Monitoring report received.	Jason Weigle
2/17/2005	Update or Other Action	Completed review of the Draft Decision Document for Petroleum Sites with No Unacceptable Risk. Sent comments to the Navy for incorporation into the Decision Document.	Jason Weigle
2/25/2005	Update or Other Action	January 2005 free product report received from Foster Wheeler; recommended closing out program.	Jason Weigle
3/2/2005	Update or Other Action	Sent out letter denying request to end free product recovery program; Navy and URS are in concurrence with this recommendation.	Jason Weigle
3/4/2005	Update or Other Action	Review of Draft 2004 Annual Monitoring report completed.	Jason Weigle
3/4/2005	Update or Other Action	Also see Event ID 837 in LUST Database for additional information on this site.	Jason Weigle
3/7/2005	Update or Other Action	Added MRTS data, derived from ADNR and USGS range, township, and section data overlaid on lat/lon coordinates derived previously. Accuracy is equivalent to the lat/lon coordinates. MRTS information depicts the center point of range fans and target areas; actual target areas or fans may overlap several sections.	Jason Weigle
3/8/2005	Update or Other Action	Added legal description for site.	Jason Weigle
5/20/2005	Record of Decision	Decision Document for Petroleum Sites with No Unacceptable Risks signed on this date. Long-term monitored natural attenuation, completion of free product recovery selected as remedies for this site.	Jason Weigle
5/20/2005	Long Term Monitoring Established	Long-term monitored natural attenuation.	Jason Weigle
5/23/2005	Update or Other Action	The Final 2004 Annual Groundwater Monitoring Report was received. The Navy recommends reducing NAP monitoring frequency at wells 04-601 and TS-01 to once every 5 years.	Meghan Dooley
5/23/2005	Conditional Closure Approved	No further action other than monitoring expected at this site.	Jason Weigle
1/11/2006	Update or Other Action	Interim removal action completed at this site. The OU A ROD selected free product recovery as an interim measure at this site. A report, the Closure Report, Interim Action Free Product Recovery, was submitted on November 18, 2005 for review. The Department completed review and submitted a closure letter on January 11, 2006, closing the interim remedy in favor of the currently selected remedy in the Decision Document for this site.	Jason Weigle
1/19/2006	Update or Other Action	File number issued 2501.38.003.07.	Aggie Blandford
1/27/2006	Update or Other Action	The Final Closure Report, Interim Free Product Recovery for this site was received on this date.	Jason Weigle
2/2/2006	Update or Other Action	Approval of the Final Project Plans for 2006 Assessment Activities: As required under the Decision Document for this site, a well will be installed at the site to fill a gap in the plume analysis. The Project Plan for 2006 Assessment Activities describes the sampling and analysis to be undertaken as this well is installed. A soil sample will be collected at the location of the well and analyzed for petroleum related chemicals.	Jason Weigle
2/16/2006	Update or Other Action	Revised Draft Petroleum Summary Report Received. The report summarizes the additional 'confirmation' sampling that the Navy conducted as part of the Decision Document for Petroleum Sites with No Unacceptable Risk. A soil sample was collected from a depth of 5 to 7 feet between to larger 'hotspots' within this depth range. The sample was analyzed for DRO, GRO, and BTEX. All contaminants were found in the sample, although at much lower levels than the other two areas.	Jason Weigle
3/20/2006	Update or Other Action	Final 2005 Institutional Control Primary Site Inspection Report received on this date. No IC problems noted at this site.	Jason Weigle
3/20/2006	Update or Other Action	The draft annual groundwater monitoring report for 2005 was received on this date.	Jason Weigle
4/7/2006	Update or Other Action	Comments submitted on the 2005 annual groundwater monitoring report. 2005 groundwater monitoring data shows continuing DRO contamination at this site. Four of the five wells samples contained DRO contamination above clean-up levels. All wells but the downgradient well showed GRO contamination but only one (04-306) showed contamination above clean-up levels (1460ppb). Benzene was not detected in any well above clean-up levels. Due to the signing of the decision document for this site in 2005, this is the first time many of the wells have been sampled since their establishment. Therefore, statistical trends have not been established for all but two wells. Monitoring will be continued at 2005 levels in 2006.	Jason Weigle
6/9/2006	Update or Other Action	The Final 2005 Annual Groundwater Monitoring Report was received. The Navy recommends continuing monitoring as prescribed.	Meghan Dooley
12/18/2006	Update or Other Action	Received Draft 2006 Institutional Control Primary Site Inspection Report that details the results of annual Institutional Control (IC) inspections to determine the effectiveness of IC's selected in the OUA Record of Decision.	Guy Warren
12/27/2006	Update or Other Action	Submitted comment letter to the Navy on the Draft Institutional Control Primary Site Inspection Report. Comments focused on the adequacy of the excavation notification program, the effectiveness of the ordnance awareness program, and visitor notification of ICs.	Guy Warren
2/15/2007	Update or Other Action	Received Draft Annual Ground Water Monitoring Report, which presents the results of September 2006 ground water monitoring activities at 24 sites at the Former Adak Naval Complex.	Guy Warren
3/13/2007	Update or Other Action	Received the Final 2006 Institutional Control Primary Site Inspection Report. Several Department comments will be addressed through revisions of the Institutional Control Management Plan planned for 2007. The remaining comments were addressed and additional recomendations to increase efforts to notify island visitors of ICs (including the ordnance awareness education program) were included in the final document.	Guy Warren
4/25/2007	Update or Other Action	Submitted comments on the Draft Annual Ground Water Monitoring Report. Primary areas of concern include: increasing trends in contaminant levels at several sites, Increased free product, and adherence to field sampling procedures. In general it appears that declining ground water levels are responsible for the increase in free product and dissolved contaminant concentrations. The Navy and DEC have agreed to reinstate free product recovery at those sites showing increases in free product.	Guy Warren
7/26/2007	Update or Other Action	Received Final Annual Ground Water Monitoring Report, September 2006. The Department's comments have been addressed in the Final Report. The Navy has agreed to conduct additional free product recovery at those sites with increassed free rpoduct. The Navy has agreed to evaluate conditions at several sites with increasing contaminant trends to determine if additional investigation or remediaiton is required.	Guy Warren
3/28/2008	Update or Other Action	The comments for the draft 2007 Annual Groundwater Monitoring Report were sent. General concerns include: consistency of groundwater depth and flow measurements between sites, reporting of free product recovery methods and results, inclusion of the Petroleum Summary Report in recommendations for applicable sites in this report, tracking changes to the CMP, and extending surface water and sediment monitoring to appropriate sites. ADEC concurs with monitoring changes to site, but recommends continued annual BTEX monitoring at well 04-290.	Meghan Dooley
8/14/2008	Update or Other Action	The Final 2007 Annual Groundwater Monitoring Report was received on this date. The Navy recommends discontinuing BTEX monitoring at 4 wells and continuing BTEX at 04-290, 04-601, and 04-306 only. GRO and DRO monitoring will remain as prescribed.	Meghan Dooley
5/20/2009	Update or Other Action	The comments for the draft 2008 Annual Groundwater Monitoring Report were sent. General concerns include: adequacy of the MNA remedy and increasing contaminant levels, implementation of recommendations from the Petroleum Summary Report, effects of the March 2008 earthquake and documentation in the report, the monitoring well network, and the inclusion of useful photos. ADEC concurs with the cessation of GRO and BTEX at well 04-175, and with the recommendation for well 04-601. ADEC would be willing to consider monitoring wells TS-01 and TS-05 every other year for DRO and GRO.	Meghan Dooley
8/21/2009	Update or Other Action	The Final 2008 Annual Groundwater Monitoring Report was received on this date. The Navy recommendations are as follows: Discontinuing GRO and BTEX monitoring at well 04-175, reduce GRO and benzene sampling at well 04-601 to every even year, discontinue TEX sampling at well 04-601, and reduce monitoring activities at wells TS-01 and TS-05 to every even year. Monitoring of free product is recommended to continue annually.	Meghan Dooley
3/12/2010	Update or Other Action	The draft 2009 Annual Groundwater monitoring Report was received on this date. The Navy recommends discontinuing monitoring of TEX in all samples at the site and terminating monthly free product recovery activities.	Meghan Dooley
4/15/2010	Update or Other Action	Comments for the draft 2009 Annual Groundwater Monitoring Report were sent on this date. ADEC concurs with the recommendations for this site.	Meghan Dooley
11/22/2010	Exposure Tracking Model Ranking	Initial ranking with ETM completed for source area id: 73195 name: auto-generated pm edit Adak Tanker Shed	Meghan Dooley
2/16/2011	Document, Report, or Work plan Review - other	The draft 2010 IC Site Inspection Report was received on January 11, 2011 and DEC sent comments on February 16, 2011. It was recommended that the abandoned remediation systems be investigated and possibly be removed.	Meghan Dooley
5/12/2011	Document, Report, or Work plan Review - other	The Final 2010 IC Site Inspection Report was received by ADEC. IC's appear to be functioning as intended for this site.	Meghan Dooley
6/27/2011	CERCLA ROD Periodic Review	The draft Third 5-Year Review was received. The purpose of the 5-Year Review is to evaluate the effectiveness of the remedy and determine if further action is warranted to protect human health and the environment. The document listed actions taken to address issues from the previous 5-Year Review, and offered new recommendations based on data collected from 2006 to 2010 from Operable Units A and B-1. It concluded that the remedy is functioning as intended at all but 4 sites and provided the following area-wide recommendations: 1. Update the current Comprehensive Monitoring Plan, Institutional Control Monitoring Plan, Operation and maintenance Plan, 2. Update the document repositories, 3. Assess and update as necessary the Community Relations Plan, and 4. Address action items identified during 2010 site inspections. The 5-Year Review recommends discontinuing GRO monitoring at well 04-290 and discontinuing benzene monitoring at all site wells at the Tanker Shed site. All other monitoring should continue as prescribed.	Meghan Dooley
7/11/2011	Document, Report, or Work plan Review - other	The Final 2010 Annual Groundwater Monitoring Report was received. The report recommends discontinuing monitoring at wells TS-01 and TS-05.	Meghan Dooley
10/12/2012	Document, Report, or Work plan Review - other	Received Final 2011 Annual Groundwater Monitoring Report. Recomendations for site include discontinuation of sampling for Benzene since results have remained below endpoint criteria since 2003. All other monitoring will continue as prescribed.	Guy Warren
4/5/2013	Document, Report, or Work plan Review - other	ADEC sent comments on the draft 2012 Annual Groundwater Monitoring Report. ADEC concurs with recommendations to reduce monitroing frequency to odd years,	Meghan Dooley
6/4/2013	Institutional Control Periodic Reporting	The 2012 Final Institutional Controls Site Inspection Report was received. There were no indications of groundwater use, changes in land use, or unauthorized excavations. Excavation restriction signs were clearly visible. ICs appear to be functioning as intended. An abandoned remediation system was present during inspection but planned to be removed in November 2012.	Meghan Dooley
9/8/2014	Document, Report, or Work plan Review - other	Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. DRO remains above endpoint criteria in site wells. The concentrations are stable or decreasing. Monitoring will continue as prescribed.	Guy Warren
9/10/2014	Institutional Control Periodic Reporting	The 2013 Final Institutional Controls Site Inspection Report was received. There were no indications of groundwater use, changes in land use, or unauthorized excavations. Excavation restriction signs were clearly visible. ICs appear to be functioning as intended. The abandoned remediation system was removed. IC inspection frequency has been reduced to every odd year.	Guy Warren
6/10/2015	Update or Other Action	Received Final Annual Groundwater and Landfill Monitoring Report, 2014 Long Term Monitoring at OUA of the Former Adak Naval Complex. Because natural attenuation at this site is progressing it is recommended that all monitoring at this site continue as prescribed.	Guy Warren
7/16/2017	Site Visit	ADEC completed a three day site visit to Adak NAVFAC. All active sites were visited and current status discussed at length with NAVFAC representatives. Current field work activities were observed and noted. Work plan activities were proceeding as scheduled. No work plan deviations were evident.	Darren Mulkey
5/23/2018	Site Characterization Report Approved	Annual Groundwater and Landfill Monitoring Report, 2017 Long-Term Monitoring, Operable Unit A was finalized. Natural attenuation of petroleum hydrocarbons has been demonstrated on Adak. As a result, the CMP, Revision 6 (Navy 2014) prescribed natural attenuation parameter (NAP) monitoring once every 5 years. This monitoring was last conducted in 2014 at all MNA sites.	Darren Mulkey
5/23/2018	Site Characterization Report Approved	Annual Groundwater and Landfill Monitoring Report, 2017 Long-Term Monitoring, Operable Unit A was finalized. Natural attenuation of petroleum hydrocarbons has been demonstrated on Adak. As a result, the CMP, Revision 6 (Navy 2014) prescribed natural attenuation parameter (NAP) monitoring once every 5 years. This monitoring was last conducted in 2014 at all MNA sites.	Darren Mulkey
10/24/2018	Document, Report, or Work plan Review - other	Reviewed and approved Adak Comprehensive Monitoring Plan Revision 7, Operable Unit A. All LTM sites are updated for ground and surface water monitoring.	Darren Mulkey
3/6/2019	Document, Report, or Work plan Review - other	During the 2018 monitoring event, groundwater, surface water, and sediment samples were collected from 123 monitoring locations at 19 sites. Product thickness and depth to water measurements were performed at 159 locations from these sites. Monitoring was conducted to satisfy Operable Unit A Record of Decision (Navy, ADEC, and EPA 2000) remedy requirements and subsequent to free product recovery remedy requirements that were established under the State-Adak Environmental Restoration Agreement (Navy and ADEC 1994). Monitoring was conducted to assess the remedies of monitored natural attenuation, limited groundwater monitoring, surface water protection, and compliance. Based on the previous monitoring results, the monitored natural attenuation remedies appear to be effective and biodegradation appears to be occurring to varying degrees at all of the monitored natural attenuation sites (Navy 2017). Monitoring for natural attenuation parameters has been reduced from annually to every 4 to 6 years to coincide with the next 5-year review, and was conducted in 2018. Because DRO concentration remains above the endpoint criterion in three of the currently monitored site wells, it is recommended that monitoring continue as prescribed.	Darren Mulkey
5/28/2019	Conceptual Site Model Submitted	Received the Final Conceptual Site Model for light Non-Aqueous Phase Liquid and Dissolved Petroleum Constituents, East Canal, Former Adak Naval Complex, Adak Island, Alaska dated May 2019. The Navy implements a light non-aqueous phase liquid (LNAPL) recovery program across several sites in the downtown Adak area where LNAPL and its dissolved phase constituents are present in groundwater and may impact nearby surface water bodies. East Canal, located along the eastern margin of Runway 18-36 south of the airport terminal building, is one such water body where LNAPL seeps have been noted and efforts have been undertaken to contain a hydrocarbon sheen on the water surface in the canal. Sites known to contain petroleum hydrocarbon contamination in the vicinity of East Canal include Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak (SWMU 62); Former Power Plant, Building T-1451 (Former Power Plant); Area 303, General Communications, Inc. (GCI) Compound (Area 303); Naval Mobile Construction Battalion (NMCB) Building T-1416; and South of Runway 18-36 (Figure 1-2). Historically, these sites have been evaluated and addressed individually. The purpose of this report is to holistically evaluate East Canal and the sites surrounding it to develop an updated CSM for LNAPL and associated dissolved phase constituents that can be used to make informed decisions to facilitate management and environmental restoration of the area.	Darren Mulkey
8/18/2022	Site Visit	CS Staff conducted a site visit on Adak Island from August 10-13, 2022.	Jamie McKellar
8/9/2024	Long Term Monitoring Workplan or Report Review	WASTE MANAGEMENT PLAN APPROVED: Final Waste Management Plan 2024 Long-Term Monitoring at Operable Unit A and 2024 Waste Management Plan Addendum (via email).	Jamie McKellar
8/21/2024	Site Visit	CS staff conducted site visits and attended a Regional Advisory Board (RAB) meeting on Adak Island. During the trip, CS staff and representatives from the US Navy also participated in a “RAB Field Day” organized by a RAB member who wanted to highlight some issues of concern - petroleum contamination at Sweeper Creek, the spillway at Lake Andrew, and munitions concerns in Parcel 4. While on the island, CS staff also met with contractors conducting PFAS sampling and long-term monitoring activities, and CS staff attended a community meeting hosted by the Aleut Corporation (TAC) and its contractor to discuss the community’s Brownfields Community Wide Assessment Grant.	Jamie McKellar

Action Date

Action

Description

DEC Staff

11/10/1994

Update or Other Action

(Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Notice of release received and ADEC response letter sent.

Scott Pexton

10/24/1995

Site Added to Database

DRO and benzene.

Scott Pexton

4/15/2000

Record of Decision

The Record of Decision for this site was signed this date.

Elim Yoon

12/28/2001

Institutional Control Record Established

Institutional Control Established. Includes Equitable Servitude for: Commercial/Industrial Land Use Restrictions, Excavation permit required for areas with Soil Excavation Restrictions, and requirements for Inspections and Reporting. See document “Adak Island Institutional Control Management Plan, Final Edition, December 2001, Prepared by: Engineering Field Activity, Northwest.”

Elim Yoon

3/1/2003

Update or Other Action

The Final 2001 Annual Groundwater Monitoring Report was received on this date. The Navy recommends continuing monitoring at the sentinel well.

Meghan Dooley

10/10/2003

Record of Decision

Site removed from OU A ROD by OU A ROD Amendment; will be regulated under 18 AAC 75.

Sami Goldman

6/17/2004

Update or Other Action

Comments for the 2003 Annual Groundwater Monitoring report were sent. General concerns include: the field team may not be familiar with the requirements in the CMP and SOP, and changes in ARARs.

Meghan Dooley

9/1/2004

Update or Other Action

Site is currently in proposed plan stages.

Jason Weigle

9/1/2004

Update or Other Action

Property transferred to ADOT/PF on March 17, 2004.

Jason Weigle

9/7/2004

Update or Other Action

The Final 2003 Annual Groundwater Monitoring Report was received. DRO and benzene were observed above endpoint criteria in 2002. The Navy recommends maintaining the current monitoring schedule.

Meghan Dooley

9/15/2004

Risk Assessment Report Approved

Risk Assessment approved as part of Focused Feasibility Study for Free-Product Sites Below Health Goals.

Jason Weigle

9/15/2004

Site Characterization Report Approved

Site characterization report approved as part of Focused Feasibility Study for Free-Product Sites Below Health Goals.

Jason Weigle

9/15/2004

Update or Other Action

Focused Feasibility Study Approved for this site.

Jason Weigle

10/19/2004

GIS Position Updated

Latitude and Longitude was derived using ArcGIS with either High Resolution Aerial Photography from the Navy with an up to 3 meters error, or line maps used in investigations combined with road layers, +/-25 feet accuracy. Metadata is as follows: Updated NAD 1983 State Plane Alaska 10 FIPS 5010 Feet; Projection: Lambert Conformal Conic; False Easting: 3280833.333333; False Northing: 0.000000; Central Meridian: -176.000000; Standard Parallel 1: 51.833333; Standard Parallel 2: 53.833333; Latitude of Origin: 51.000000; GCS North American 1983.

Jason Weigle

12/10/2004

Cleanup Level(s) Approved

10x Table C levels selected in Proposed Plan.

Jason Weigle

1/24/2005

Update or Other Action

Received copy of the Draft Decision Document for Petroleum Sites with No Unacceptable Risk for review.

Jason Weigle

2/8/2005

Update or Other Action

Risk assessments were used to justify remedial endpoints for active remediation, not final clean-up endpoints.

Jason Weigle

2/8/2005

Update or Other Action

Monitored natural attenuation and free product removal selected as remedies in Proposed Plan.

Jason Weigle

2/8/2005

Update or Other Action

Free product recovery was reinstituted at the site in August of 2004. Monitoring will continue through July of 2005.

Jason Weigle

2/9/2005

Update or Other Action

Interim conveyance document contains an equitable servitude that restricts residential land use as well as the domestic use of groundwater. Site is also located in the downtown excavation notification zone.

Jason Weigle

2/17/2005

Update or Other Action

2004 Annual Monitoring report received.

Jason Weigle

2/17/2005

Update or Other Action

Completed review of the Draft Decision Document for Petroleum Sites with No Unacceptable Risk. Sent comments to the Navy for incorporation into the Decision Document.

Jason Weigle

2/25/2005

Update or Other Action

January 2005 free product report received from Foster Wheeler; recommended closing out program.

Jason Weigle

3/2/2005

Update or Other Action

Sent out letter denying request to end free product recovery program; Navy and URS are in concurrence with this recommendation.

Jason Weigle

3/4/2005

Update or Other Action

Review of Draft 2004 Annual Monitoring report completed.

Jason Weigle

3/4/2005

Update or Other Action

Also see Event ID 837 in LUST Database for additional information on this site.

Jason Weigle

3/7/2005

Update or Other Action

Added MRTS data, derived from ADNR and USGS range, township, and section data overlaid on lat/lon coordinates derived previously. Accuracy is equivalent to the lat/lon coordinates. MRTS information depicts the center point of range fans and target areas; actual target areas or fans may overlap several sections.

Jason Weigle

3/8/2005

Update or Other Action

Added legal description for site.

Jason Weigle

5/20/2005

Record of Decision

Decision Document for Petroleum Sites with No Unacceptable Risks signed on this date. Long-term monitored natural attenuation, completion of free product recovery selected as remedies for this site.

Jason Weigle

5/20/2005

Long Term Monitoring Established

Long-term monitored natural attenuation.

Jason Weigle

5/23/2005

Update or Other Action

The Final 2004 Annual Groundwater Monitoring Report was received. The Navy recommends reducing NAP monitoring frequency at wells 04-601 and TS-01 to once every 5 years.

Meghan Dooley

5/23/2005

Conditional Closure Approved

No further action other than monitoring expected at this site.

Jason Weigle

1/11/2006

Update or Other Action

Interim removal action completed at this site. The OU A ROD selected free product recovery as an interim measure at this site. A report, the Closure Report, Interim Action Free Product Recovery, was submitted on November 18, 2005 for review. The Department completed review and submitted a closure letter on January 11, 2006, closing the interim remedy in favor of the currently selected remedy in the Decision Document for this site.

Jason Weigle

1/19/2006

Update or Other Action

File number issued 2501.38.003.07.

Aggie Blandford

1/27/2006

Update or Other Action

The Final Closure Report, Interim Free Product Recovery for this site was received on this date.

Jason Weigle

2/2/2006

Update or Other Action

Approval of the Final Project Plans for 2006 Assessment Activities: As required under the Decision Document for this site, a well will be installed at the site to fill a gap in the plume analysis. The Project Plan for 2006 Assessment Activities describes the sampling and analysis to be undertaken as this well is installed. A soil sample will be collected at the location of the well and analyzed for petroleum related chemicals.

Jason Weigle

2/16/2006

Update or Other Action

Revised Draft Petroleum Summary Report Received. The report summarizes the additional 'confirmation' sampling that the Navy conducted as part of the Decision Document for Petroleum Sites with No Unacceptable Risk. A soil sample was collected from a depth of 5 to 7 feet between to larger 'hotspots' within this depth range. The sample was analyzed for DRO, GRO, and BTEX. All contaminants were found in the sample, although at much lower levels than the other two areas.

Jason Weigle

3/20/2006

Update or Other Action

Final 2005 Institutional Control Primary Site Inspection Report received on this date. No IC problems noted at this site.

Jason Weigle

3/20/2006

Update or Other Action

The draft annual groundwater monitoring report for 2005 was received on this date.

Jason Weigle

4/7/2006

Update or Other Action

Comments submitted on the 2005 annual groundwater monitoring report. 2005 groundwater monitoring data shows continuing DRO contamination at this site. Four of the five wells samples contained DRO contamination above clean-up levels. All wells but the downgradient well showed GRO contamination but only one (04-306) showed contamination above clean-up levels (1460ppb). Benzene was not detected in any well above clean-up levels. Due to the signing of the decision document for this site in 2005, this is the first time many of the wells have been sampled since their establishment. Therefore, statistical trends have not been established for all but two wells. Monitoring will be continued at 2005 levels in 2006.

Jason Weigle

6/9/2006

Update or Other Action

The Final 2005 Annual Groundwater Monitoring Report was received. The Navy recommends continuing monitoring as prescribed.

Meghan Dooley

12/18/2006

Update or Other Action

Received Draft 2006 Institutional Control Primary Site Inspection Report that details the results of annual Institutional Control (IC) inspections to determine the effectiveness of IC's selected in the OUA Record of Decision.

Guy Warren

12/27/2006

Update or Other Action

Submitted comment letter to the Navy on the Draft Institutional Control Primary Site Inspection Report. Comments focused on the adequacy of the excavation notification program, the effectiveness of the ordnance awareness program, and visitor notification of ICs.

Guy Warren

2/15/2007

Update or Other Action

Received Draft Annual Ground Water Monitoring Report, which presents the results of September 2006 ground water monitoring activities at 24 sites at the Former Adak Naval Complex.

Guy Warren

3/13/2007

Update or Other Action

Received the Final 2006 Institutional Control Primary Site Inspection Report. Several Department comments will be addressed through revisions of the Institutional Control Management Plan planned for 2007. The remaining comments were addressed and additional recomendations to increase efforts to notify island visitors of ICs (including the ordnance awareness education program) were included in the final document.

Guy Warren

4/25/2007

Update or Other Action

Submitted comments on the Draft Annual Ground Water Monitoring Report. Primary areas of concern include: increasing trends in contaminant levels at several sites, Increased free product, and adherence to field sampling procedures. In general it appears that declining ground water levels are responsible for the increase in free product and dissolved contaminant concentrations. The Navy and DEC have agreed to reinstate free product recovery at those sites showing increases in free product.

Guy Warren

7/26/2007

Update or Other Action

Received Final Annual Ground Water Monitoring Report, September 2006. The Department's comments have been addressed in the Final Report. The Navy has agreed to conduct additional free product recovery at those sites with increassed free rpoduct. The Navy has agreed to evaluate conditions at several sites with increasing contaminant trends to determine if additional investigation or remediaiton is required.

Guy Warren

3/28/2008

Update or Other Action

The comments for the draft 2007 Annual Groundwater Monitoring Report were sent. General concerns include: consistency of groundwater depth and flow measurements between sites, reporting of free product recovery methods and results, inclusion of the Petroleum Summary Report in recommendations for applicable sites in this report, tracking changes to the CMP, and extending surface water and sediment monitoring to appropriate sites. ADEC concurs with monitoring changes to site, but recommends continued annual BTEX monitoring at well 04-290.

Meghan Dooley

8/14/2008

Update or Other Action

The Final 2007 Annual Groundwater Monitoring Report was received on this date. The Navy recommends discontinuing BTEX monitoring at 4 wells and continuing BTEX at 04-290, 04-601, and 04-306 only. GRO and DRO monitoring will remain as prescribed.

Meghan Dooley

5/20/2009

Update or Other Action

The comments for the draft 2008 Annual Groundwater Monitoring Report were sent. General concerns include: adequacy of the MNA remedy and increasing contaminant levels, implementation of recommendations from the Petroleum Summary Report, effects of the March 2008 earthquake and documentation in the report, the monitoring well network, and the inclusion of useful photos. ADEC concurs with the cessation of GRO and BTEX at well 04-175, and with the recommendation for well 04-601. ADEC would be willing to consider monitoring wells TS-01 and TS-05 every other year for DRO and GRO.

Meghan Dooley

8/21/2009

Update or Other Action

The Final 2008 Annual Groundwater Monitoring Report was received on this date. The Navy recommendations are as follows: Discontinuing GRO and BTEX monitoring at well 04-175, reduce GRO and benzene sampling at well 04-601 to every even year, discontinue TEX sampling at well 04-601, and reduce monitoring activities at wells TS-01 and TS-05 to every even year. Monitoring of free product is recommended to continue annually.

Meghan Dooley

3/12/2010

Update or Other Action

The draft 2009 Annual Groundwater monitoring Report was received on this date. The Navy recommends discontinuing monitoring of TEX in all samples at the site and terminating monthly free product recovery activities.

Meghan Dooley

4/15/2010

Update or Other Action

Comments for the draft 2009 Annual Groundwater Monitoring Report were sent on this date. ADEC concurs with the recommendations for this site.

Meghan Dooley

11/22/2010

Exposure Tracking Model Ranking

Initial ranking with ETM completed for source area id: 73195 name: auto-generated pm edit Adak Tanker Shed

Meghan Dooley

2/16/2011

Document, Report, or Work plan Review - other

The draft 2010 IC Site Inspection Report was received on January 11, 2011 and DEC sent comments on February 16, 2011. It was recommended that the abandoned remediation systems be investigated and possibly be removed.

Meghan Dooley

5/12/2011

Document, Report, or Work plan Review - other

The Final 2010 IC Site Inspection Report was received by ADEC. IC's appear to be functioning as intended for this site.

Meghan Dooley

6/27/2011

CERCLA ROD Periodic Review

The draft Third 5-Year Review was received. The purpose of the 5-Year Review is to evaluate the effectiveness of the remedy and determine if further action is warranted to protect human health and the environment. The document listed actions taken to address issues from the previous 5-Year Review, and offered new recommendations based on data collected from 2006 to 2010 from Operable Units A and B-1. It concluded that the remedy is functioning as intended at all but 4 sites and provided the following area-wide recommendations: 1. Update the current Comprehensive Monitoring Plan, Institutional Control Monitoring Plan, Operation and maintenance Plan, 2. Update the document repositories, 3. Assess and update as necessary the Community Relations Plan, and 4. Address action items identified during 2010 site inspections. The 5-Year Review recommends discontinuing GRO monitoring at well 04-290 and discontinuing benzene monitoring at all site wells at the Tanker Shed site. All other monitoring should continue as prescribed.

Meghan Dooley

7/11/2011

Document, Report, or Work plan Review - other

The Final 2010 Annual Groundwater Monitoring Report was received. The report recommends discontinuing monitoring at wells TS-01 and TS-05.

Meghan Dooley

10/12/2012

Document, Report, or Work plan Review - other

Received Final 2011 Annual Groundwater Monitoring Report. Recomendations for site include discontinuation of sampling for Benzene since results have remained below endpoint criteria since 2003. All other monitoring will continue as prescribed.

Guy Warren

4/5/2013

Document, Report, or Work plan Review - other

ADEC sent comments on the draft 2012 Annual Groundwater Monitoring Report. ADEC concurs with recommendations to reduce monitroing frequency to odd years,

Meghan Dooley

6/4/2013

Institutional Control Periodic Reporting

The 2012 Final Institutional Controls Site Inspection Report was received. There were no indications of groundwater use, changes in land use, or unauthorized excavations. Excavation restriction signs were clearly visible. ICs appear to be functioning as intended. An abandoned remediation system was present during inspection but planned to be removed in November 2012.

Meghan Dooley

9/8/2014

Document, Report, or Work plan Review - other

Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. DRO remains above endpoint criteria in site wells. The concentrations are stable or decreasing. Monitoring will continue as prescribed.

Guy Warren

9/10/2014

Institutional Control Periodic Reporting

The 2013 Final Institutional Controls Site Inspection Report was received. There were no indications of groundwater use, changes in land use, or unauthorized excavations. Excavation restriction signs were clearly visible. ICs appear to be functioning as intended. The abandoned remediation system was removed. IC inspection frequency has been reduced to every odd year.

Guy Warren

6/10/2015

Update or Other Action

Received Final Annual Groundwater and Landfill Monitoring Report, 2014 Long Term Monitoring at OUA of the Former Adak Naval Complex. Because natural attenuation at this site is progressing it is recommended that all monitoring at this site continue as prescribed.

Guy Warren

7/16/2017

Site Visit

ADEC completed a three day site visit to Adak NAVFAC. All active sites were visited and current status discussed at length with NAVFAC representatives. Current field work activities were observed and noted. Work plan activities were proceeding as scheduled. No work plan deviations were evident.

Darren Mulkey

5/23/2018

Site Characterization Report Approved

Annual Groundwater and Landfill Monitoring Report, 2017 Long-Term Monitoring, Operable Unit A was finalized. Natural attenuation of petroleum hydrocarbons has been demonstrated on Adak. As a result, the CMP, Revision 6 (Navy 2014) prescribed natural attenuation parameter (NAP) monitoring once every 5 years. This monitoring was last conducted in 2014 at all MNA sites.

Darren Mulkey

5/23/2018

Site Characterization Report Approved

Darren Mulkey

10/24/2018

Document, Report, or Work plan Review - other

Reviewed and approved Adak Comprehensive Monitoring Plan Revision 7, Operable Unit A. All LTM sites are updated for ground and surface water monitoring.

Darren Mulkey

3/6/2019

Document, Report, or Work plan Review - other

During the 2018 monitoring event, groundwater, surface water, and sediment samples were collected from 123 monitoring locations at 19 sites. Product thickness and depth to water measurements were performed at 159 locations from these sites. Monitoring was conducted to satisfy Operable Unit A Record of Decision (Navy, ADEC, and EPA 2000) remedy requirements and subsequent to free product recovery remedy requirements that were established under the State-Adak Environmental Restoration Agreement (Navy and ADEC 1994). Monitoring was conducted to assess the remedies of monitored natural attenuation, limited groundwater monitoring, surface water protection, and compliance. Based on the previous monitoring results, the monitored natural attenuation remedies appear to be effective and biodegradation appears to be occurring to varying degrees at all of the monitored natural attenuation sites (Navy 2017). Monitoring for natural attenuation parameters has been reduced from annually to every 4 to 6 years to coincide with the next 5-year review, and was conducted in 2018. Because DRO concentration remains above the endpoint criterion in three of the currently monitored site wells, it is recommended that monitoring continue as prescribed.

Darren Mulkey

5/28/2019

Conceptual Site Model Submitted

Received the Final Conceptual Site Model for light Non-Aqueous Phase Liquid and Dissolved Petroleum Constituents, East Canal, Former Adak Naval Complex, Adak Island, Alaska dated May 2019. The Navy implements a light non-aqueous phase liquid (LNAPL) recovery program across several sites in the downtown Adak area where LNAPL and its dissolved phase constituents are present in groundwater and may impact nearby surface water bodies. East Canal, located along the eastern margin of Runway 18-36 south of the airport terminal building, is one such water body where LNAPL seeps have been noted and efforts have been undertaken to contain a hydrocarbon sheen on the water surface in the canal. Sites known to contain petroleum hydrocarbon contamination in the vicinity of East Canal include Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak (SWMU 62); Former Power Plant, Building T-1451 (Former Power Plant); Area 303, General Communications, Inc. (GCI) Compound (Area 303); Naval Mobile Construction Battalion (NMCB) Building T-1416; and South of Runway 18-36 (Figure 1-2). Historically, these sites have been evaluated and addressed individually. The purpose of this report is to holistically evaluate East Canal and the sites surrounding it to develop an updated CSM for LNAPL and associated dissolved phase constituents that can be used to make informed decisions to facilitate management and environmental restoration of the area.

Darren Mulkey

8/18/2022

Site Visit

CS Staff conducted a site visit on Adak Island from August 10-13, 2022.

Jamie McKellar

8/9/2024

Long Term Monitoring Workplan or Report Review

WASTE MANAGEMENT PLAN APPROVED: Final Waste Management Plan 2024 Long-Term Monitoring at Operable Unit A and 2024 Waste Management Plan Addendum (via email).

Jamie McKellar

8/21/2024

Site Visit

CS staff conducted site visits and attended a Regional Advisory Board (RAB) meeting on Adak Island. During the trip, CS staff and representatives from the US Navy also participated in a “RAB Field Day” organized by a RAB member who wanted to highlight some issues of concern - petroleum contamination at Sweeper Creek, the spillway at Lake Andrew, and munitions concerns in Parcel 4. While on the island, CS staff also met with contractors conducting PFAS sampling and long-term monitoring activities, and CS staff attended a community meeting hosted by the Aleut Corporation (TAC) and its contractor to discuss the community’s Brownfields Community Wide Assessment Grant.

Jamie McKellar

Contaminant Information

Name	Level Description	Media	Comments
DRO	Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation	Soil
DRO	> Table C	Groundwater

Name

Level Description

Media

Comments

DRO

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

Soil

DRO

> Table C

Groundwater

Control Type

Type	Details
Equitable Servitude	The Equitable Servitude to the Interim Conveyance Document restricts groundwater use and residential land use.
Institutional Control Management Plan	The Institutional Control Management Plan, a supbart of the base-wide Comprehensive Monitoring Plan, requires the completion of a dig notification in the Downtown Area and at several outback locations.

Type

Details

Equitable Servitude

The Equitable Servitude to the Interim Conveyance Document restricts groundwater use and residential land use.

Institutional Control Management Plan

The Institutional Control Management Plan, a supbart of the base-wide Comprehensive Monitoring Plan, requires the completion of a dig notification in the Downtown Area and at several outback locations.

Requirements

Description	Details
Excavation / Soil Movement Restrictions	All excavation within the 'downtown area' of Adak, as defined in the Equitable Servitude to the Interim Conveyance Document, must be submitted to the City of Adak and the Navy for review three days prior to excavation. Annual report of excavation notifications included in the IC Inspection Report.
Restricted to Industrial / Commercial Land Use	Equitable servitude restricts land uses to non-residential uses. Site is inspected and reported yearly to ensure there are no residential land uses taking place.
Groundwater Use Restrictions	The Equitable Servitude restricts groundwater use in the Downtown Area. Site is inspected and reported yearly to ensure groundwater is not being used in the Downtown Area.
Groundwater Monitoring	The Comprehensive Monitoring Plan Rev. 2 requires annual groundwater monitoring for this site. Groundwater is sampled yearly for various parameters.

Description

Details

Excavation / Soil Movement Restrictions

All excavation within the 'downtown area' of Adak, as defined in the Equitable Servitude to the Interim Conveyance Document, must be submitted to the City of Adak and the Navy for review three days prior to excavation. Annual report of excavation notifications included in the IC Inspection Report.

Restricted to Industrial / Commercial Land Use

Equitable servitude restricts land uses to non-residential uses. Site is inspected and reported yearly to ensure there are no residential land uses taking place.

Groundwater Use Restrictions

The Equitable Servitude restricts groundwater use in the Downtown Area. Site is inspected and reported yearly to ensure groundwater is not being used in the Downtown Area.

Groundwater Monitoring

The Comprehensive Monitoring Plan Rev. 2 requires annual groundwater monitoring for this site. Groundwater is sampled yearly for various parameters.

There are no documents for this site report.

Hazard ID	Site Name	File Number
27909	Adak Island OU A, B1, & B2	2501.38.007.01

Hazard ID

Site Name

File Number

27909

Adak Island OU A, B1, & B2

2501.38.007.01

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: Adak Tanker Shed UST 42494

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