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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: Darren Mulkey, darren.mulkey@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.

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 Report or Workplan 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 Report or Workplan 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 Report or Workplan 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 Report or Workplan 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 Report or Workplan 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 Report or Workplan 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

Contaminant Information

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.

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.

There are no documents for this site report.

Missing Location Data

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