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Site Report: Adak SWMU 61 Tank Farm B


Site Name: Adak SWMU 61 Tank Farm B
Address: OU A, Adak Naval Air Facility, Adak, AK 99546
File Number: 2501.38.003.23
Hazard ID: 2229
Status: Active
Staff: Darren Mulkey, darren.mulkey@alaska.gov
Latitude: 51.862347
Longitude: -176.663789
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

Tank Farm B was constructed and placed into operation in 1943. the facility originally consisted of 40 23,800-gallon USTs and one 420,000-gallon field-constructed tank (designated V156-A2). All tanks in this farm were for Avgas storage; total capacity was 1.37 million gallons. A second FCT (10262-A1) was built in 1958 and was used to store JP-5 and later mogas. The FCTs were constructed underground and had pumphouses on top of them. Several pipelines 6 to 10 inches in diameter were used to transfer fuel to, around, and from the site. Each tank contained a valve pit that connected it to the rest of the system. In 1993, the 40 USTs were removed. FCT V156-A2 was removed in 1985. FCT 10262-01 was drained, cleaned, disconnected from the pipeline system, inspected, and placed in inactive status. An 8-inch pipeline transferred avgas from Former Fuel Dock No. 7 to Tank Farm B. This pipeline was abandoned in 1977. Tank Farm B historically supplied avgas to several truck fill stands located west and southwest of the farm through pipelines 6 inched in diameter. The fill stands have not been used since 1958 and these pipelines are currently abandoned. FCT 10262-A1 was supplied with mogas through the 10-inch-diameter Tank Farm B to Fuel Pier Pipeline. This pipeline has also been used to transfer avgas and JP-5. Removal of the fuel tanks identified four possible source areas of contamination: a central source area near FCT 10262-A1 and UST pair T8758-17-A and B; an eastern source area located south of UST pair T8761-9-A and B; and two northern source areas, one located north of UST pairs T8761-12-A and B and T8766-12-A and B; and one adjacent to the abandoned 4-inch-diameter avgas pipeline (Tank Farm B to Tank Farm C pipeline). Numerous site investigations identified DRO and GRO in soils. The site was retained in the site screening process due to GRO levels above screening limits for soil and the location of the site less than 200 feet away from a waterbody. Monitored Natural Attenuation was selected under the OU A ROD for this site. The site was removed from the OU A ROD by the OU A ROD amendment for regulation solely under 18 AAC 75. The MNA decision was carried through. This site represents cumulative actions for the following sites that have been deleted from the DB: Tank ID T830LCA Adak NAF Tank Frm B, Reckey 199325X034401; Tank ID T8745-5A Adak NAF Tank Fm B, Reckey 199325X034402; rTank ID T8745-5B Adak NAF Tank Fm B, Reckey 199325X034403; Tank ID T8756-A Adak NAF Tank Frm B, Reckey 199325X034404; Tank ID T8758-17A Adak NAF Farm B, Reckey 199325X034405; Tank ID T8758-17B Adak NAF Farm B, Reckey 199325X034406; Tank ID T8759-7A Adak NAF Tk Farm B, Reckey 199325X034407; Tank ID T8759-7B Adak NAF Tk Farm B, Reckey 199325X034408; Tank ID T8760-19A Adak NAF Tk Frm B, Reckey 199325X034409; Tank ID T8761-9A Adak NAF Tk Farm B, Reckey 199325X034410; Tank ID T8761-9B Adak NAF Tk Farm B, Reckey 199325X034411; Tank ID T8764-16A Adak NAF Tk Frm B, Reckey 199325X034412; Tank ID T8764-16B Adak NAF Farm B, Reckey 199325X034413; Tank ID T8764-8B Adak NAF Tank Fm B, Reckey 199325X034414; Tank ID T8765-15A Adak NAF Farm B, Reckey 199325X034415; Tank ID T8765-15B Adak NAF Farm B, Reckey 199325X034416; Tank ID T8766-13B Adak NAF Farm B, Reckey 199325X034417; Tank ID T8767-12A Adak NAF Farm B, Reckey 199325X034418; Tank ID T8768-11B Adak NAF Farm B, Reckey 199325X034419; and Tank ID T8769-10B Adak NAF Farm B, Reckey 199325X034420. 2005 monitoring data shows that contaminant levels remain high at this site. GRO and benzene continue to be issues at well 14-113. GRO is the main issue at well 14-210. TFB-MW4B is the most impacted well with GRO, benzene, toluene, ethylbenzene, and xylene contamination all above clean-up levels. GRO and benzene at well TFB-MW4B remains significantly above background levels. If 2006 data indicates no changes in contamination levels, the Department will ask the Navy to reconsider the remedy for this site.

Action Information

Action Date Action Description DEC Staff
1/1/1994 Update or Other Action Site included in State-Navy two-party SAERA agreement for petroleum sites. No Longer Assigned
10/12/1994 Site Added to Database TPH. No Longer Assigned
6/16/1995 Site Ranked Using the AHRM Initial ranking. Action code added because it wasn't when the site was originally ranked. No Longer Assigned
5/1/1998 Proposed Plan Site to be included in the ROD for OU-A. Christina Goff
9/1/1999 Update or Other Action Site included in ROD for OU-A and recommended for monitored natural attenuation due to unacceptable human health risk from petroleum hydrocarbons. Institutional controls required. Kevin Oates
4/15/2000 Record of Decision The Record of Decision for this site was signed this date. Elim Yoon
5/9/2001 Update or Other Action Three actions were located in the 20 deleted sites that were subordinate to this site and duplicated for each of the 20 sites. They are the following listed in chronological order: Update; 10/15/1993; Patrick-Riley; (Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Notice of release letter received and ADEC reply letter sent. Preliminary Assessment Approved; 3/31/1994; Patrick-Riley; (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Reviewed phase 1 site assessment report. Contamination identified and reported above cleanup level. Site Added to Database; 10/26/1995; Pexton; Site added to database. No Longer Assigned
12/28/2001 Institutional Control Record Established Institutional Control Established. Includes Equitable Servitude for: Commercial/Industrial Land Use Restrictions, Groundwater 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 Final 2001 Annual Groundwater Monitoring Report received. Recommendations include continued Monitored Natural Attenuation. Navy also recommended changes in natural attenuation parameter measurements including chloride, total and dissolved organic carbons, nitrate/nitrites, sulfides, and ORP. 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
5/26/2004 Update or Other Action Received September 2003 Annual Groundwater Monitoring Report. Meghan Dooley
6/17/2004 Update or Other Action ADEC Comments for the Draft September 2003 Annual Groundwater Monitoring Report sent. Concerns include: field team familiarity with CMP and changes in ARAR's following the establishment of the OU-A ROD. Meghan Dooley
9/1/2004 Update or Other Action RAC; site in IC monitoring program Jason Weigle
9/7/2004 Update or Other Action Received Final 2003 Annual Ground Water monitoring Report. Navy recommends that well TFB-MW4B be discontinued due to GRO and BTEX levels below the endpoint criteria during 2002 and 2003. All other current monitoring schedules should be maintained. Meghan Dooley
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
2/17/2005 Update or Other Action 2004 Annual Monitoring report received. Jason Weigle
3/4/2005 Update or Other Action Review of Draft 2004 Annual Monitoring report completed. 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
5/23/2005 Update or Other Action Final 2004 Annual Groundwater Monitoring Report received. Navy recommends reduction in NAP monitoring at wells 14-113, 14-210 and TFB-MW4B be reduced to once every five years, but to continue GRO and BTEX groundwater monitoring at the current schedule. Meghan Dooley
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
4/5/2006 Update or Other Action File number 2501.38.003.01 assigned on this date. Jason Weigle
4/7/2006 Update or Other Action Comments on the 2005 annual groundwater monitoring report submitted. 2005 monitoring data shows that contaminant levels remain high at this site. GRO and benzene continue to be issues at well 14-113. GRO is the main issue at well 14-210. TFB-MW4B is the most impacted well with GRO, benzene, toluene, ethylbenzene, and xylene contamination all above clean-up levels. GRO and benzene at well TFB-MW4B remains significantly above background levels. If 2006 data indicates no changes in contamination levels, the Department will ask the Navy to reconsider the remedy for this site. Jason Weigle
6/9/2006 Update or Other Action Final 2005 Annual Groundwater Monitoring Report received. Continued annual monitoring is recommended for site as GRO and BTEX levels remain above cleanup level. Navy recognizes the potential for migration of hydrocarbons into surface water and therefore recommends visual inspection for signs of petroleum seeps and sheen on the surface water bodies proximal to the groundwater monitoring points. 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 (including SWMU 61) with increasing contaminant trends to determine if additional investigation or remediaiton is required. Guy Warren
12/21/2007 Update or Other Action Received Draft Petroleum Summary Report for sites Antenna Field, SA79, Former Power Plant, SWMU 60, and SWMU 61 at the former Adak Naval Complex. The report summarizes the investigation activities that have been conducted at these sites to date. The report recommends adding surface water sampling from two locations to the annual monitoring program. Guy Warren
1/9/2008 Update or Other Action Submitted comments on the Draft Petroleum Summary Report (PSR) to the Navy. The Navy’s recommendations for additional monitoring at this site are totally inadequate to deal with the zone of contaminated ground water flowing into North Sweeper Creek. The Department is requesting that the Navy conduct ground water remediation at this site to prevent petroleum from impacting surface water quality. Guy Warren
2/13/2008 Update or Other Action Draft 2007 Annual Groundwater Monitoring Report received. Meghan Dooley
3/25/2008 Update or Other Action Final 2008 Petroleum Summary Report received. Exceedences in clean up levels for petroleum-related contaminants were found in both groundwater and soil. The Navy recommends that the existing remedy be evaluated for augmentation options via an EE/CA. Options evaluated should include an interception/treatment barrier and source removal. Planning efforts will likely be completely by 2008 with a field effort to follow in 2009. Meghan Dooley
3/28/2008 Update or Other Action Submitted comments on the Draft Annual Ground Water Monitoring Report. Primary areas of concern include: consistency in recommendations for depth to water measurements in determining groundwater elevation, consistency throughout sampling and reporting of FPR, optimization of monitoring regimes at specific sites, consistency in the petroleum summary report, and incorporating changes agreed to into the CMP. Meghan Dooley
6/27/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Evonne Reese
8/18/2008 Update or Other Action Final 2007 Annual Groundwater Monitoring Report received. Navy recommends continuing surface water sampling for GRO, TAH and TAqH as well as sediment sampling for GRO and BTEX at location NL-04 for one more year. Annual monitoring should be continued for all other sites, and an EE/CA will be prepared for 2008. Meghan Dooley
3/20/2009 Update or Other Action Draft 2008 Annual Groundwater Monitoring Report received. Meghan Dooley
5/14/2009 Update or Other Action File number 2501.38.003.23 assigned on this date. Previous site specific information can be found in 2501.38.003.01. Guy Warren
5/20/2009 Update or Other Action ADEC comments sent for 2008 Annual Groundwater Monitoring Report. Concerns include: increasing concentrations of contaminants at several sites and the adequacy of the MNA remedy at these sites, data consistency regarding an increase in oil seepage into East Canal not included in monthly reports. DEC is also concerned about destroyed monitoring wells and the possibility that they are not being replaced if essential to meeting objectives. ADEC recommends that the navy inventory all wells required for annual monitoring, properly decommission un-needed wells, and secure those where monitoring is necessary. ADEC also recommends that for those sites showing a trend increase, an evaluation should be performed in order to determine if additional action is necessary. SWMU 61 recommendations from the Petroleum Summary Report have not yet been implemented and recommendations for TAH and TAqH exceedences should be addressed. Meghan Dooley
8/21/2009 Update or Other Action Final 2008 Annual Groundwater monitoring Report received. Navy recommends sampling for sediments and surface water at NL -04 should continue as prescribed until sediment concentrations decrease. Other site monitoring will continue on an annual basis. An increase in xylene was noted. An EE/CA, to be conducted in 2009, is recommended to further evaluate other remedy options and implementation. Meghan Dooley
3/11/2010 Update or Other Action Draft 2009 Annual Groundwater Monitoring Report received. Navy recommends collection of surface water samples annually at locations NL-04 and NL-D-04 for DRO, GRO, TAH, and TAqH. Sediment samples for DRO, GRO and BTEX are also recommended for these sites, with silica gel cleanup prior to analysis. Meghan Dooley
3/15/2010 Update or Other Action Draft EE/CA received. EE/CA evaluates 8 alternatives (including no action) to supplement the current MNA program of the ROD in order to prevent further degradation of surface water quality in North Sweeper Creek. Meghan Dooley
4/8/2010 Update or Other Action ADEC comments for EE/CA sent. Meghan Dooley
4/15/2010 Update or Other Action ADEC comments sent for 2009 Annual Groundwater Monitoring Report. Concerns include increasing trends of contaminants at several sites. ADEC concurs with Navy recommendations at many sites that include cessation of some monitoring, however does not concur with Navy at sites showing an increasing trend in contaminant concentrations. ADEC concurs with recommendations regarding SWMU 61. Meghan Dooley
5/27/2010 Update or Other Action The Draft SAP Additional Petroleum Characterization and figures were received. Meghan Dooley
7/9/2010 Site Visit ADEC visited Tank Farm B to assess the need for more site characterization. It was agreed between ADEC and NAVFAC that hand augering will be sufficient for the additional well being placed and further steps will be assessed once results from monitoring are available. Meghan Dooley
7/9/2010 Site Visit ADEC visited the site to determine the need for additional characterization. ADEC and NAVFAC agreed that additional characterization is required and will be implemented by placement of a hand auger well. The need for further action will be determined when the results from monitoring are received. Meghan Dooley
10/12/2010 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 73207 Tank farm. Meghan Dooley
2/14/2011 Report or Workplan Review - Other The draft Site Characterization Report was received on December 30, 2010 and ADEC sent comments on February 14, 2011. Soil samples were taken at 7 locations to further characterize the lateral extent of contamination. It determined that contamination concentration has decreased in the area previously delineated as impacted soil. No recommendations were offered for the site. 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. There were no observed problems with ICs at this site. Meghan Dooley
5/6/2011 Report or Workplan Review - Other The final Engineering Evaluation/Cost Estimate was received. The EE/CA evaluated 8 alternatives to address the soil and groundwater contamination at the site. A decision between the Navy and DEC in July, 2010, however determined that no additional action at the site is warranted. Should a removal action be necessary in the future the results of this EE/CA will be considered. Meghan Dooley
5/10/2011 Site Characterization Report Approved The Final Site Characterization Report was received. The report recommends continuing Monitored natural Attenuation at the site since GRO remains above cleanup levels in the groundwater. It also recommends continuing surface water and sediment sampling in Sweeper Creek. Meghan Dooley
5/12/2011 Report or Workplan Review - Other The Final 2010 IC Site Inspection Report was received by ADEC. ICs appear to be functioning as intended at 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 that annual monitoring be continued as prescribed for site SWMU 61. Meghan Dooley
7/11/2011 Report or Workplan Review - Other The Final Annual Groundwater MOnitoring Report was received. The report recommends collecting surface water samples and sediment samples annually at locations NL-D-04 and NL-04, and analyze for DRo, GRO, TAH, TAqH in surface water and DRO, GRO, BTEX in sediments. This remedy for this site is currently under evaluation to determine if there are more effective means of remediation. Meghan Dooley
10/12/2012 Report or Workplan Review - Other Received Final 2011 Annual Groundwater Monitoring Report. Since GRO, BTEX, TAH and TAqH concentrations in groundwater remain above their endpoint criteria groundwater 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 the recommendation to reduce monitoring frequency to odd years at this site. Meghan Dooley
6/4/2013 Institutional Control Periodic Reporting The Final 2012 Institutional Control Site Inspection Report was received. There were no observed changes to land use and no indications of groundwater use or excavation activities. Signs were present. ICs appear to be functioning as intended. Meghan Dooley
9/8/2014 Report or Workplan Review - Other Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. DRO, GRO, TAH and TAqH concentrations in groundwater remain above endpoint criteria. Surface water remains below endpoint criteria. GRO and Benzene are exhibiting decreasing trends. Monitoring will continue as prescribed. This site will continue to be monitored to ensure petroleum does not enter surface water. Guy Warren
9/10/2014 Institutional Control Periodic Reporting The Final 2013 Institutional Control Site Inspection Report was received. There were no observed changes to land use and no indications of groundwater use or excavation activities. Signs were present. ICs appear to be functioning as intended. 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. Surface water and sediment sampling at NL-04 will be discontinued, adjacent surface water protection well has decreasing concentration trend and results from NL-04 have not exceeded end point since sampling began in 2011. Shoreline inspections at this location will continue. All other monitoring will continue biennially. 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
GRO > Table C Groundwater
Benzene > Table C Groundwater
Ethylbenzene > Table C Groundwater
Toluene > Table C Groundwater
Xylenes (total) > 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.
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.
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 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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