Site Report: Adak SWMU 17 Power Plant #3

Site Name:	Adak SWMU 17 Power Plant #3
Address:	OU A, Adak Naval Air Facility, Adak, AK 99546
File Number:	2501.38.003.13
Hazard ID:	519
Status:	Active
Staff:	Jamie McKellar, 9074515175 jamie.mckellar@alaska.gov
Latitude:	51.870472
Longitude:	-176.659019
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

SWMU 17 is the Power Plant 3 area and is the active electricity generation plant on island. The site consists of the Power Plant 3 building, an old Quonset hut, two O/W separators, a bulk storage waste oil tank, five ASTs, two temporary drum storage areas, a dry cleaning facility, two free product interceptor trenches, a waste oil pond, a retention pond, a seepage area along the slope below the power plant, and stained areas within the ditches along both sides of Akutan Way. A product interceptor trench was installed in 1996. The waste oil and retention ponds were dredged and backfilled in 1999. A remedial action to remove JP-5 from the groundwater was conducted from 1996 to 2000. Petroleum contaminated soils were removed from an area north of the power plant and the area was backfilled and revegetated in 1998. Source control and institutional controls were selected under CERCLA in the OU A ROD. Free product recovery system in operation under SAERA and was the remedy selected under SAERA in the OU A ROD. The site was removed from the OU A ROD by the OU A ROD Amendment for regulation of petroleum contamination under 18 AAC 75. This site was considered a 'risk' petroleum site due to petroleum contamination in sediment presenting an unacceptable risk to ecological receptors. Additional sediment sampling conducted in 2005 demonstrated that contamination levels in South Sweeper Creek had decreased to the point where they were no longer a risk to receptors. The petroleum portion is still active and is being remediation under state regulations. The site characterization and risk assessments for SWMU 17 were submitted for review in October 2005 and approved in February of 2006. The feasibility study was approved on April 17, 2006. Decision document signed on December 19, 2006. Monitoring is on-going.

Action Information

Action Date	Action	Description	DEC Staff
12/8/1987	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). TetraTech Draft Work Plan, Site Inspections, Naval Air Station Adak, Adak Island, Alaska. Plan date 11/87.	Former Staff
7/1/1988	Update or Other Action	(Old R:Base Action Code = SI - Site Investigation). Harding Lawson obtained composite samples from pipeline ditch as part of IRP study. TPH up to 50,000 ppm.	Former Staff
9/26/1988	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). TetraTech QA/QC Plan, Site Inspections, Naval Air Station, Adak, Adak Island, Alaska. Plan date 6/88.	Former Staff
2/23/1989	Interim Removal Action Approved	(Old R:Base Action Code = SC - Site Control (Emergency Response)). Containment dikes and absorbent booms used to control JP-5 spill. Discharge due to failure of fuel line. Fuel saturation of tundra and soil, and fuel entering Bering Sea via drainage ditch.	Former Staff
3/15/1989	Site Characterization Report Approved	(Old R:Base Action Code = SI - Site Investigation). "Report of Findings, Assessment of Petroleum Spill at Naval Air Station, Adak, Alaska" by Century West Engineering. Estimated 220,000 square feet of fuel contaminated soil. Soil gas survey performed with Hnu readings up to 210 ppm. Recommended detailed investigation.	Former Staff
3/17/1989	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Spill Prevention Control and Countermeasure Plan. 3/17/89 is date received by ADEC.	Former Staff
4/1/1989	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Work plan for site investigation by URS.	Former Staff
5/1/1989	Update or Other Action	(Old R:Base Action Code = FI - Field Inspection (General)). Site inspection.	Bruce Erickson
5/1/1989	Update or Other Action	(Old R:Base Action Code = SI - Site Investigation). TetraTech Site Inspection Report, Naval Air Station Adak, Adak Island, Alaska, Volumes I and II. Discussion of power plant waste oil pit. Surface water soil sampling performed. Surface water contamination by lead, mercury, and zinc. Soil had up to 254 ppm zinc and 2500 ppm TPH. Report date May 1989.	Former Staff
5/1/1989	Update or Other Action	(Old R:Base Action Code = SI - Site Investigation). TetraTech NAS Adak Expanded Site Inspection Program, QA/QC Report for Field and Laboratory Support Activities, Volumes I, II and III. Site inspection report for waste oil pit at power plant indicates observed surface water contamination. Sediments in pond up to 254 ppm heavy metals and 2500 ppm TPH. Soil contamination estimated at 0.2 acres.	Former Staff
6/1/1989	Update or Other Action	(Old R:Base Action Code = FI - Field Inspection (General)). Site inspection.	Ron Klein
7/7/1989	Interim Removal Action Approved	(Old R:Base Action Code = REM - Removal / Excavation). Excavation of contaminated soil. Soil stockpiled.	Former Staff
8/1/1989	Update or Other Action	(Old R:Base Action Code = F - Site Treatment, Soil/H2O). Recovery of JP-5 from retention pond.	Former Staff
8/9/1989	Notice of Violation	Issued for violations of AS 46.03.710, AS 46.03.755, AS 46.03.740, and AS 46.04.020. Includes request for description of leak test methods, report of line leak testing, contamination assessment, work schedule for recovery well installation, and a report detailing prevention of runoff from stockpiled soil.	Ron Klein
9/27/1989	Interim Removal Action Approved	(Old R:Base Action Code = SC - Site Control (Emergency Response)). Containment booms used for JP-5 spill of unknown quantity.	Former Staff
11/9/1989	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). TetraTech Work Plan, QA/QC Project Plan, Field Sampling Plan, Health and Safety Plan, RI/FS, Naval Air Station Adak, Adak Island, Alaska. Plan dates 10/89.	Former Staff
5/11/1990	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). URS CTO-008 Site 11, 17, 20, 21A, RIFS Naval Air Station Adak, Adak Island, Alaska, Work Plan, Sampling and Analysis Plan, Health and Safety Plan; Draft Plan date 5/3/90. Final plan date 6/25/90.	Former Staff
8/7/1990	Update or Other Action	(Old R:Base Action Code = SI - Site Investigation). URS Reconnaissance Investigation Report for Naval Air Station Adak, Adak Island, Alaska. Draft Report dated 11/6/89. Final report dated 3/1/90. Soil vapor study showed high concentrations near power plant. Up to 41,000 ppm TPH, 28 ppb benzene, 1200 ppb toluene, 3600 ppb xylenes, and 690 ppb ethylbenzene detected in soil. Leak areas 2 and 3 appear to have traveled along surface and into groundwater to the north toward Hillside Blvd. and southeast toward Sweeper Cove. No TPH found in groundwater, however, sheens observed on water at test pit excavations.	Former Staff
1/3/1991	Site Number Identifier Changed	Old Reckey 1988210106701. Changed to reflect correct region and DoD workplan.	Former Staff
1/3/1991	Site Ranked Using the AHRM	Site ranked, score = 44.	Former Staff
1/1/1992	Site Added to Database	Oil, TCE, PCBs, BTEX, VOCs, SVOCs.	Former Staff
9/29/1992	Site Number Identifier Changed	Region portion of Reckey number changed to consolidate district 26 into 25.	Former Staff
1/1/1994	Update or Other Action	Site to be evaluated under 1994 SAERA two-party agreement between State and Navy.	Christina Goff
6/16/1995	Site Ranked Using the AHRM	Site ranking updated. Score still = 44.	Former Staff
11/8/1995	Update or Other Action	(Old R:Base Action Code = RIFS - Remedial Investigation / Feasibility Study). RIFS action added by Shannon and Wilson on 3/14/97, based on Relative Risk Evaluation Worksheet dated 11/8/95. Human pathway: SI, PI, VI, GW, DC. Ecological pathway: SI, PI, VI, bioacc, sed. contact. Receptors: potential future residents and current recreational exposures, ecological exposure to terrestrial and avian receptors, aquatic fresh water receptors.	S&W-Miner
4/16/1996	Site Number Identifier Changed	Reckey 9425X118016 was a duplicate. Consolidated data from all tables into this Reckey.	Scott Pexton
9/1/1999	Update or Other Action	Site included in ROD for OU-A. Institutional controls plus removal and treatment of sediment, surface water, and surface soil required.	Kevin Oates
4/15/2000	Record of Decision	The Record of Decision for this site was signed this date.	Elim Yoon
1/9/2001	Site Ranked Using the AHRM	Changed Toxicity Value from 2 to 4 for hazardous substances.	Former Staff
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	The Final 2001 Annual Groundwater Monitoring Report was received on this date. VOCs were detected at concentrations above the OU-A ROD cleanup criteria. No target analytes were detected above cleanup levels at any other wells. Navy recommends continued sentinel monitoring as prescribed. Navy also recommends checking for presence of LNAPL at recovery wells and determining if further monitoring is appropriate for R-1 and R-6.	Meghan Dooley
7/8/2003	Site Number Identifier Changed	Changed Workplan from X1 to X9 to reflect presence of hazardous substances.	Beatrice Egbejimba
10/10/2003	Record of Decision	Site removed from OU A ROD by OU A ROD Amendment for regulation 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
9/7/2004	Update or Other Action	The Final 2003 Annual Groundwater Monitoring Report was received on this date. Analytes were reported below endpoint criteria for wells 05-375, 05-810, 05-811 and 05-815 in 2002 and 2003. Analytes at well 05-375 were observed at concentrations greater than their endpoint criteria. The Navy recommends that the current monitoring schedule be maintained at these sites. At wells R-1 and R-6 the Navy recommends reducing monitoring to bis(2-ethylhexyl)phthalate, DRO and RRO and to remove monitoring of PCE, TCE and its breakdown products.	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
10/26/2004	Update or Other Action	Site is considered a free product 'risk' site. RI/FS including site characterization and risk assessment is being prepared for submittal to the department.	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
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	The Final 2004 Annual Groundwater Monitoring Report was received on this date. The navy recommends discontinuing bis(2-ethylhexyl)phthalate monitoring at wells 05-735, R-1, and R-6, discontinuing RRO monitoring at R-1 and R-6, and to reduce NAP monitoring at wells 05-810, 05-811, and 05-815 to once every five years.	Meghan Dooley
6/16/2005	Update or Other Action	Draft Close Out Report for Partial Delisting of non-petroleum contamination submitted for review on this date.	Jason Weigle
8/16/2005	Update or Other Action	Comments on Draft Close Out Report for Partial Delisting submitted to Navy on this date.	Jason Weigle
10/6/2005	Update or Other Action	The site characterization report and risk assessments for SWMU 17 were submitted on this date.	Jason Weigle
11/22/2005	Update or Other Action	Comments on the SWMU 17 site characterization report and risk assessment were submitted to the Navy on this date.	Jason Weigle
1/19/2006	Update or Other Action	File number issued 2501.38.003.13.	Aggie Blandford
2/2/2006	Risk Assessment Report Approved	Risk Assessment Report for SWMU 17 approved on this date. Site conditions were found not to be a risk based on additional sampling collected in 2005.	Jason Weigle
2/2/2006	Site Characterization Report Approved	Site characterization report for SWMU 17 approved on this date.	Jason Weigle
2/21/2006	Update or Other Action	Final copies of the site characterization and risk assessments recieved for SWMU 17. The remainder of the FFS will follow.	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 on the 2005 groundwater monitoring report were submitted to the Navy. 2005 groundwater monitoring data shoes that DRO concentrations remain below clean-up levels for most of the site except for well R-6. PCE, TCE, cis-1,2-DCE, vinyl chloride, and methylene chloride all remain above clean-up levels in well 05-735. Bis(2-ethylhexyl)phthalate has been removed from the analyte list due its meeting the endpoint criteria.	Jason Weigle
4/17/2006	Update or Other Action	The focused feasibility study for the petroleum portion of SWMU 17 was approved on this date.	Jason Weigle
6/9/2006	Update or Other Action	The Final 2005 Annual Groundwater Monitoring Report was received on this date. The Navy recommends discontinuing monitoring for bis(2-ethylhexyl)phthalate as it has met the endpoint criteria for wells 05-735, R-1 and R-6.	Meghan Dooley
8/31/2006	Update or Other Action	Recieved Draft Technical Memorandum for Proposed Long Term Monitoring at SWMU 17.	Guy Warren
11/13/2006	Update or Other Action	Issued comment letter on the draft Tech Memo for Proposed Long Term Monitoring. Minor revisions are required.	Guy Warren
11/13/2006	Update or Other Action	Recieved Draft Decision Document for SWMU 17 Power Plant #3.	Guy Warren
11/22/2006	Cleanup Assumed by ADEC	Issued comment letter on Draft Decision Document (DD). Only Minor revisions of the DD are required.	Guy Warren
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
12/19/2006	CERCLA ROD Approved	Decision Document for SWMU signed on this date by ADEC>	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 recommends that well PP-05 and HC-02 be added to the ongoing free product recovery efforts.	Meghan Dooley
6/27/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Evonne Reese
8/14/2008	Update or Other Action	The Final 2007 Annual Groundwater Monitoring Report was received on this date. The Navy recommends continuing monitoring as prescribed for this site.	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 does not concur with the cessation of monitoring at well R-2, R-1 and 05-375. ADEC would be willing to reduce monitoring frequency at these wells to every other year and re-evaluation following the next sampling event.	Meghan Dooley
8/21/2009	Update or Other Action	The Final 2008 Annual Groundwater Monitoring Report was received on this date. The Navy recommends continuing monitoring for free phase product annually but reducing DRO sampling at 3 wells to every even year.	Meghan Dooley
3/12/2010	Update or Other Action	The draft 2009 Annual Groundwater Monitoring Report was received on this date. The Navy recommends terminating monthly free product recovery activities at this site.	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
12/3/2010	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 71498 Power plant operations.	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. The following housekeeping issues were observed at the site: crushed drums and transformers stored onsite and oil stained soil. The report recommends that these issues be dealt with and the operator of the power plant be notified to improve housekeeping and waste management practices.	Meghan Dooley
5/12/2011	Document, Report, or Work plan Review - other	The Final 2010 IC Site Inspection Report was received. There were no observed changes in land use, no indication of groundwater use, and no excavation activities were found.	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 monitoring for DRO at 11 wells at site SWMU 17 be discontinued, and that monitoring for PCE, cis-1,2 DCE, and vinyl chloride continue at well 05-735.	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 HC-1, HC-2, HC-3, R-2 through R-6, and reducing monitoring at wells PP-05, R-1, and 05-375 to every even year.	Meghan Dooley
10/12/2012	Document, Report, or Work plan Review - other	Received Final 2011 Annual Groundwater Monitoring report. No changes recomended for this site.	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 discontinue DRO monitroing at the site and reduce monitoring frequency at well 05-375.	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. A 15 x 10' excavation was observed that was done to fix a water leak to the city's main water supply. No excavation Notification was submitted. Approximatly 50 - 100 crushed drums were staged on pallets as they were in 2011, but no soil staining was observed. 150 crushed drums and a large AST were observed in the secondary containment as they were in 2011. Additional transformers were observed on site, but have "No PCBs" stickers. Signs were present.	Meghan Dooley
9/4/2014	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 71498 Power plant operations.	Guy Warren
9/8/2014	Document, Report, or Work plan Review - other	Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. Chlorinated VOC's remain above endpoint criteria in 05-735 but are exhibiting decreasing concentrations, monitoring will continue though with reduced analytes.	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. Several areas of stained soil were observed around the power plant. However housekeeping appears to have improved and the majority of the old drums that were present during previous inspections have been removed. Signs were present.	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. Analytes continue to exceed endpoint criteria at well 05-735 but exhibit decreasing trends. Therefore sampling will 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
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. Vinyl chloride and cis-1,2-dichloroethene (DCE) remain above endpoint criteria in compliance well 05-735, but are exhibiting statistically significant decreasing trends at the 80 and 95 percent confidence intervals and have met the CMP, Revision 6 (Navy 2014a) secondary endpoint criteria. It is therefore recommended that sampling at the site be discontinued.	Darren Mulkey
3/6/2020	Institutional Control Periodic Reporting	The U.S. Navy (Navy) is the lead agency and responsible party for monitoring and ensuring the effectiveness of the institutional controls (ICs) selected in the Operable Unit (OU) A Record of Decision (ROD) and the OU B-1 ROD at the Former Naval Complex, Adak, Alaska. The Navy is required to conduct monitoring for as long as site conditions pose an unacceptable risk for unlimited use and unrestricted exposure to the community and the environment. The ICs will remain in place until those conditions are met. If any of the ICs are ineffective or if significant failures pose harmful risks to the community and the environment, the Navy is responsible for additional remedial actions. Repairs to ICs identified by periodic inspections will be conducted by the Navy approximately every 3 to 5 years, if needed. If severe or unusual failures of ICs are observed, the Navy will conduct additional emergency repairs at that time. Because it has been shown that ICs have generally remained effective since 2005, reductions to the monitoring program began in 2013. Currently, 28 sites are inspected biennially (including Parcel 4) with 39 sites (including 12 remote OU B-1 sites) inspected every 5 years.	Darren Mulkey
3/11/2024	ANCSA Program Eligible	This site meets the criteria for the EPA Contaminated ANCSA Lands program: the site is on ANCSA conveyed land, the contamination occurred pre-ANCSA conveyance, and there is documented proof of contamination that exceeds DEC’s cleanup values in 18 AAC 75. This site will be listed as “verified” on EPA’s contaminated lands inventory.	Brittani Mack

Action Date

Action

Description

DEC Staff

12/8/1987

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). TetraTech Draft Work Plan, Site Inspections, Naval Air Station Adak, Adak Island, Alaska. Plan date 11/87.

Former Staff

7/1/1988

Update or Other Action

(Old R:Base Action Code = SI - Site Investigation). Harding Lawson obtained composite samples from pipeline ditch as part of IRP study. TPH up to 50,000 ppm.

Former Staff

9/26/1988

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). TetraTech QA/QC Plan, Site Inspections, Naval Air Station, Adak, Adak Island, Alaska. Plan date 6/88.

Former Staff

2/23/1989

Interim Removal Action Approved

(Old R:Base Action Code = SC - Site Control (Emergency Response)). Containment dikes and absorbent booms used to control JP-5 spill. Discharge due to failure of fuel line. Fuel saturation of tundra and soil, and fuel entering Bering Sea via drainage ditch.

Former Staff

3/15/1989

Site Characterization Report Approved

(Old R:Base Action Code = SI - Site Investigation). "Report of Findings, Assessment of Petroleum Spill at Naval Air Station, Adak, Alaska" by Century West Engineering. Estimated 220,000 square feet of fuel contaminated soil. Soil gas survey performed with Hnu readings up to 210 ppm. Recommended detailed investigation.

Former Staff

3/17/1989

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Spill Prevention Control and Countermeasure Plan. 3/17/89 is date received by ADEC.

Former Staff

4/1/1989

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Work plan for site investigation by URS.

Former Staff

5/1/1989

Update or Other Action

(Old R:Base Action Code = FI - Field Inspection (General)). Site inspection.

Bruce Erickson

5/1/1989

Update or Other Action

(Old R:Base Action Code = SI - Site Investigation). TetraTech Site Inspection Report, Naval Air Station Adak, Adak Island, Alaska, Volumes I and II. Discussion of power plant waste oil pit. Surface water soil sampling performed. Surface water contamination by lead, mercury, and zinc. Soil had up to 254 ppm zinc and 2500 ppm TPH. Report date May 1989.

Former Staff

5/1/1989

Update or Other Action

(Old R:Base Action Code = SI - Site Investigation). TetraTech NAS Adak Expanded Site Inspection Program, QA/QC Report for Field and Laboratory Support Activities, Volumes I, II and III. Site inspection report for waste oil pit at power plant indicates observed surface water contamination. Sediments in pond up to 254 ppm heavy metals and 2500 ppm TPH. Soil contamination estimated at 0.2 acres.

Former Staff

6/1/1989

Update or Other Action

(Old R:Base Action Code = FI - Field Inspection (General)). Site inspection.

Ron Klein

7/7/1989

Interim Removal Action Approved

(Old R:Base Action Code = REM - Removal / Excavation). Excavation of contaminated soil. Soil stockpiled.

Former Staff

8/1/1989

Update or Other Action

(Old R:Base Action Code = F - Site Treatment, Soil/H2O). Recovery of JP-5 from retention pond.

Former Staff

8/9/1989

Notice of Violation

Issued for violations of AS 46.03.710, AS 46.03.755, AS 46.03.740, and AS 46.04.020. Includes request for description of leak test methods, report of line leak testing, contamination assessment, work schedule for recovery well installation, and a report detailing prevention of runoff from stockpiled soil.

Ron Klein

9/27/1989

Interim Removal Action Approved

(Old R:Base Action Code = SC - Site Control (Emergency Response)). Containment booms used for JP-5 spill of unknown quantity.

Former Staff

11/9/1989

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). TetraTech Work Plan, QA/QC Project Plan, Field Sampling Plan, Health and Safety Plan, RI/FS, Naval Air Station Adak, Adak Island, Alaska. Plan dates 10/89.

Former Staff

5/11/1990

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). URS CTO-008 Site 11, 17, 20, 21A, RIFS Naval Air Station Adak, Adak Island, Alaska, Work Plan, Sampling and Analysis Plan, Health and Safety Plan; Draft Plan date 5/3/90. Final plan date 6/25/90.

Former Staff

8/7/1990

Update or Other Action

(Old R:Base Action Code = SI - Site Investigation). URS Reconnaissance Investigation Report for Naval Air Station Adak, Adak Island, Alaska. Draft Report dated 11/6/89. Final report dated 3/1/90. Soil vapor study showed high concentrations near power plant. Up to 41,000 ppm TPH, 28 ppb benzene, 1200 ppb toluene, 3600 ppb xylenes, and 690 ppb ethylbenzene detected in soil. Leak areas 2 and 3 appear to have traveled along surface and into groundwater to the north toward Hillside Blvd. and southeast toward Sweeper Cove. No TPH found in groundwater, however, sheens observed on water at test pit excavations.

Former Staff

1/3/1991

Site Number Identifier Changed

Old Reckey 1988210106701. Changed to reflect correct region and DoD workplan.

Former Staff

1/3/1991

Site Ranked Using the AHRM

Site ranked, score = 44.

Former Staff

1/1/1992

Site Added to Database

Oil, TCE, PCBs, BTEX, VOCs, SVOCs.

Former Staff

9/29/1992

Site Number Identifier Changed

Region portion of Reckey number changed to consolidate district 26 into 25.

Former Staff

1/1/1994

Update or Other Action

Site to be evaluated under 1994 SAERA two-party agreement between State and Navy.

Christina Goff

6/16/1995

Site Ranked Using the AHRM

Site ranking updated. Score still = 44.

Former Staff

11/8/1995

Update or Other Action

(Old R:Base Action Code = RIFS - Remedial Investigation / Feasibility Study). RIFS action added by Shannon and Wilson on 3/14/97, based on Relative Risk Evaluation Worksheet dated 11/8/95. Human pathway: SI, PI, VI, GW, DC. Ecological pathway: SI, PI, VI, bioacc, sed. contact. Receptors: potential future residents and current recreational exposures, ecological exposure to terrestrial and avian receptors, aquatic fresh water receptors.

S&W-Miner

4/16/1996

Site Number Identifier Changed

Reckey 9425X118016 was a duplicate. Consolidated data from all tables into this Reckey.

Scott Pexton

9/1/1999

Update or Other Action

Site included in ROD for OU-A. Institutional controls plus removal and treatment of sediment, surface water, and surface soil required.

Kevin Oates

4/15/2000

Record of Decision

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

Elim Yoon

1/9/2001

Site Ranked Using the AHRM

Changed Toxicity Value from 2 to 4 for hazardous substances.

Former Staff

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

The Final 2001 Annual Groundwater Monitoring Report was received on this date. VOCs were detected at concentrations above the OU-A ROD cleanup criteria. No target analytes were detected above cleanup levels at any other wells. Navy recommends continued sentinel monitoring as prescribed. Navy also recommends checking for presence of LNAPL at recovery wells and determining if further monitoring is appropriate for R-1 and R-6.

Meghan Dooley

7/8/2003

Site Number Identifier Changed

Changed Workplan from X1 to X9 to reflect presence of hazardous substances.

Beatrice Egbejimba

10/10/2003

Record of Decision

Site removed from OU A ROD by OU A ROD Amendment for regulation 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

9/7/2004

Update or Other Action

The Final 2003 Annual Groundwater Monitoring Report was received on this date. Analytes were reported below endpoint criteria for wells 05-375, 05-810, 05-811 and 05-815 in 2002 and 2003. Analytes at well 05-375 were observed at concentrations greater than their endpoint criteria. The Navy recommends that the current monitoring schedule be maintained at these sites. At wells R-1 and R-6 the Navy recommends reducing monitoring to bis(2-ethylhexyl)phthalate, DRO and RRO and to remove monitoring of PCE, TCE and its breakdown products.

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

10/26/2004

Update or Other Action

Site is considered a free product 'risk' site. RI/FS including site characterization and risk assessment is being prepared for submittal to the department.

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

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

The Final 2004 Annual Groundwater Monitoring Report was received on this date. The navy recommends discontinuing bis(2-ethylhexyl)phthalate monitoring at wells 05-735, R-1, and R-6, discontinuing RRO monitoring at R-1 and R-6, and to reduce NAP monitoring at wells 05-810, 05-811, and 05-815 to once every five years.

Meghan Dooley

6/16/2005

Update or Other Action

Draft Close Out Report for Partial Delisting of non-petroleum contamination submitted for review on this date.

Jason Weigle

8/16/2005

Update or Other Action

Comments on Draft Close Out Report for Partial Delisting submitted to Navy on this date.

Jason Weigle

10/6/2005

Update or Other Action

The site characterization report and risk assessments for SWMU 17 were submitted on this date.

Jason Weigle

11/22/2005

Update or Other Action

Comments on the SWMU 17 site characterization report and risk assessment were submitted to the Navy on this date.

Jason Weigle

1/19/2006

Update or Other Action

File number issued 2501.38.003.13.

Aggie Blandford

2/2/2006

Risk Assessment Report Approved

Risk Assessment Report for SWMU 17 approved on this date. Site conditions were found not to be a risk based on additional sampling collected in 2005.

Jason Weigle

2/2/2006

Site Characterization Report Approved

Site characterization report for SWMU 17 approved on this date.

Jason Weigle

2/21/2006

Update or Other Action

Final copies of the site characterization and risk assessments recieved for SWMU 17. The remainder of the FFS will follow.

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 on the 2005 groundwater monitoring report were submitted to the Navy. 2005 groundwater monitoring data shoes that DRO concentrations remain below clean-up levels for most of the site except for well R-6. PCE, TCE, cis-1,2-DCE, vinyl chloride, and methylene chloride all remain above clean-up levels in well 05-735. Bis(2-ethylhexyl)phthalate has been removed from the analyte list due its meeting the endpoint criteria.

Jason Weigle

4/17/2006

Update or Other Action

The focused feasibility study for the petroleum portion of SWMU 17 was approved on this date.

Jason Weigle

6/9/2006

Update or Other Action

The Final 2005 Annual Groundwater Monitoring Report was received on this date. The Navy recommends discontinuing monitoring for bis(2-ethylhexyl)phthalate as it has met the endpoint criteria for wells 05-735, R-1 and R-6.

Meghan Dooley

8/31/2006

Update or Other Action

Recieved Draft Technical Memorandum for Proposed Long Term Monitoring at SWMU 17.

Guy Warren

11/13/2006

Update or Other Action

Issued comment letter on the draft Tech Memo for Proposed Long Term Monitoring. Minor revisions are required.

Guy Warren

11/13/2006

Update or Other Action

Recieved Draft Decision Document for SWMU 17 Power Plant #3.

Guy Warren

11/22/2006

Cleanup Assumed by ADEC

Issued comment letter on Draft Decision Document (DD). Only Minor revisions of the DD are required.

Guy Warren

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

12/19/2006

CERCLA ROD Approved

Decision Document for SWMU signed on this date by ADEC>

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 recommends that well PP-05 and HC-02 be added to the ongoing free product recovery efforts.

Meghan Dooley

6/27/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Evonne Reese

8/14/2008

Update or Other Action

The Final 2007 Annual Groundwater Monitoring Report was received on this date. The Navy recommends continuing monitoring as prescribed for this site.

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 does not concur with the cessation of monitoring at well R-2, R-1 and 05-375. ADEC would be willing to reduce monitoring frequency at these wells to every other year and re-evaluation following the next sampling event.

Meghan Dooley

8/21/2009

Update or Other Action

The Final 2008 Annual Groundwater Monitoring Report was received on this date. The Navy recommends continuing monitoring for free phase product annually but reducing DRO sampling at 3 wells to every even year.

Meghan Dooley

3/12/2010

Update or Other Action

The draft 2009 Annual Groundwater Monitoring Report was received on this date. The Navy recommends terminating monthly free product recovery activities at this site.

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

12/3/2010

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 71498 Power plant operations.

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. The following housekeeping issues were observed at the site: crushed drums and transformers stored onsite and oil stained soil. The report recommends that these issues be dealt with and the operator of the power plant be notified to improve housekeeping and waste management practices.

Meghan Dooley

5/12/2011

Document, Report, or Work plan Review - other

The Final 2010 IC Site Inspection Report was received. There were no observed changes in land use, no indication of groundwater use, and no excavation activities were found.

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 monitoring for DRO at 11 wells at site SWMU 17 be discontinued, and that monitoring for PCE, cis-1,2 DCE, and vinyl chloride continue at well 05-735.

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 HC-1, HC-2, HC-3, R-2 through R-6, and reducing monitoring at wells PP-05, R-1, and 05-375 to every even year.

Meghan Dooley

10/12/2012

Document, Report, or Work plan Review - other

Received Final 2011 Annual Groundwater Monitoring report. No changes recomended for this site.

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 discontinue DRO monitroing at the site and reduce monitoring frequency at well 05-375.

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. A 15 x 10' excavation was observed that was done to fix a water leak to the city's main water supply. No excavation Notification was submitted. Approximatly 50 - 100 crushed drums were staged on pallets as they were in 2011, but no soil staining was observed. 150 crushed drums and a large AST were observed in the secondary containment as they were in 2011. Additional transformers were observed on site, but have "No PCBs" stickers. Signs were present.

Meghan Dooley

9/4/2014

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 71498 Power plant operations.

Guy Warren

9/8/2014

Document, Report, or Work plan Review - other

Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. Chlorinated VOC's remain above endpoint criteria in 05-735 but are exhibiting decreasing concentrations, monitoring will continue though with reduced analytes.

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. Several areas of stained soil were observed around the power plant. However housekeeping appears to have improved and the majority of the old drums that were present during previous inspections have been removed. Signs were present.

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. Analytes continue to exceed endpoint criteria at well 05-735 but exhibit decreasing trends. Therefore sampling will 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

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. Vinyl chloride and cis-1,2-dichloroethene (DCE) remain above endpoint criteria in compliance well 05-735, but are exhibiting statistically significant decreasing trends at the 80 and 95 percent confidence intervals and have met the CMP, Revision 6 (Navy 2014a) secondary endpoint criteria. It is therefore recommended that sampling at the site be discontinued.

Darren Mulkey

3/6/2020

Institutional Control Periodic Reporting

The U.S. Navy (Navy) is the lead agency and responsible party for monitoring and ensuring the effectiveness of the institutional controls (ICs) selected in the Operable Unit (OU) A Record of Decision (ROD) and the OU B-1 ROD at the Former Naval Complex, Adak, Alaska. The Navy is required to conduct monitoring for as long as site conditions pose an unacceptable risk for unlimited use and unrestricted exposure to the community and the environment. The ICs will remain in place until those conditions are met. If any of the ICs are ineffective or if significant failures pose harmful risks to the community and the environment, the Navy is responsible for additional remedial actions. Repairs to ICs identified by periodic inspections will be conducted by the Navy approximately every 3 to 5 years, if needed. If severe or unusual failures of ICs are observed, the Navy will conduct additional emergency repairs at that time. Because it has been shown that ICs have generally remained effective since 2005, reductions to the monitoring program began in 2013. Currently, 28 sites are inspected biennially (including Parcel 4) with 39 sites (including 12 remote OU B-1 sites) inspected every 5 years.

Darren Mulkey

3/11/2024

ANCSA Program Eligible

This site meets the criteria for the EPA Contaminated ANCSA Lands program: the site is on ANCSA conveyed land, the contamination occurred pre-ANCSA conveyance, and there is documented proof of contamination that exceeds DEC’s cleanup values in 18 AAC 75. This site will be listed as “verified” on EPA’s contaminated lands inventory.

Brittani Mack

Contaminant Information

Name	Level Description	Media
DRO	Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation	Soil
DRO	> Table C	Groundwater
DRO	> Surface H20 Criteria	Surface Water - Fresh
DRO	> Site Specific Sediment Criteria	Sediment - Freshwater
Tetrachloroethene	> Table C	Groundwater
Trichloroethene	> 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

DRO

> Surface H20 Criteria

Surface Water - Fresh

DRO

> Site Specific Sediment Criteria

Sediment - Freshwater

Tetrachloroethene

> Table C

Groundwater

Trichloroethene

> 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 SWMU 17 Power Plant #3

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