Site Report: Adak South of Runway 18-36 Area

Site Name:	Adak South of Runway 18-36 Area
Address:	OU A, Adak Naval Air Facility, Adak, AK 99546
File Number:	2501.38.003.11
Hazard ID:	3448
Status:	Active
Staff:	Jamie McKellar, 9074515175 jamie.mckellar@alaska.gov
Latitude:	51.861400
Longitude:	-176.653071
Horizontal Datum:	WGS84

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

The South Runway area consists of a large portion of downtown Adak surrounding the lower reach of South Sweeper Creek. It includes land surrounding the southern portion of Runway 18-36 from the Main Road to the east to Moffett Road to the west, and south across South Sweeper Creek nearly to the Fuels Facility. Other sites within the vicinity of this area are SWMU 60, Sewage Lift Station 10 and 11, NMCB T-1416 expanded area, Former Power Plant T-1415, SWMU 57, and Amulet Housing AMW-709. The Main Road Pipeline transects the site. Some of the contamination on the site comes from leaks in WWII pipelines from SWMU 60. An abandoned fuel line was discovered during excavation along the Main Road Pipeline in the southeast corner of the runway that was a source of an underground fuel release. Several other pipelines cross this area, active, inactive, and abandoned. Free product was observed in several wells. In August of 1998, a petroleum aesthetic action was performed to cap sediment in the southern end of West Canal south of Crossover Canal. A removal was performed in 1999 to remove PCB contaminated sediment from South Sweeper Creek. An airport ditch culvert installation in 2001 resulted in removal of several cubic yards of soil from the south side of Crossover Canal and the installation of culverts throughout the entire northern side of the area. A product interception trench (perforated pipe with oil absorbant boom) was installed in August 2001 on the southern end of the site to catch product that was creating sheen on the surface of South Sweeper Creek. In 2003, the cleaning and closure of three pipelines that cross the area occurred. Free product recovery was selected in the OU A ROD and recovery is in process. The site was removed from the OU A ROD by the OU A ROD amendment for regulation under 18 AAC 75. Site is considered a 'risk' free-product recovery site. The Proposed Plan for the site went to comment in December of 2005. A decision document was signed in 2006. Installation of a free product interception trench on the eastern side of South Sweeper Creek, free-product recover, and monitored natural attenuation were the selected remedy. Groundwater, surface water, sediment, and Institutional control monitoring occur annually.

Action Information

Action Date	Action	Description	DEC Staff
4/15/2000	Site Added to Database	Petroleum.	Elim Yoon
4/15/2000	Record of Decision	The Record of Decision for this site was signed this date.	Elim Yoon
3/1/2003	Update or Other Action	The Final 2001 Annual Groundwater Monitoring Report was received on this date. GRO and DRO were observed at concentrations above OU-A ROD cleanup criteria. Navy recommends continued sentinel monitoring as well as an expedited focused feasibility study.	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 considered 'risk' free-product site and is undergoing a separate risk assessment and site characterization process.	Jason Weigle
9/7/2004	Update or Other Action	The Final 2003 Annual Groundwater Monitoring Report was received on this date. DRO, GRO, and benzene were measured at levels above endpoint criteria at certain wells. Navy recommends continuing monitoring as scheduled.	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
2/9/2005	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. Most of this AOC is located within the flight safety zone at the end of the runway.	Jason Weigle
2/16/2005	Update or Other Action	Site characterization and risk assessment recieved. Both documents include updated information on free product recovery and monitoring that has occured since previous versions of the documents came out.	Jason Weigle
2/17/2005	Update or Other Action	2004 Annual Monitoring report received.	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
3/7/2005	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
3/9/2005	Update or Other Action	Completed review of site characterization and risk assessment for this site. Comments were sent to Navy regarding the reports.	Jason Weigle
5/23/2005	Update or Other Action	The Final 2004 Annual Groundwater Monitoring Report was received on this date. Because of increasing trends in wells near South Sweeper Creek, the Navy will visually inspect the shoreline for seeps and sheen during the 2005 event. The Navy will also attempt to remove the obstruction in well E-216, however if it is unsuccessful the Navy will commence monitoring at location 18/36-02.	Meghan Dooley
7/19/2005	Site Characterization Report Approved	Focused Feasibility Study comments submitted to the Navy on July 19, 2005. Document included Site Characterization, Risk Assessment, Remedial Investigation, and Feasibility Study.	Jason Weigle
7/19/2005	Risk Assessment Report Approved	Focused Feasibility Study comments submitted to the Navy on July 19, 2005. Document included Site Characterization, Risk Assessment, Remedial Investigation, and Feasibility Study.	Jason Weigle
9/30/2005	Update or Other Action	Draft Proposed Plan received for review	Jason Weigle
11/14/2005	Proposed Plan	The proposed plan for this site was approved on this date.	Jason Weigle
12/13/2005	Update or Other Action	The Proposed Plan was made available for public comment on this date. January 13 is the end of the comment period.	Jason Weigle
12/21/2005	Update or Other Action	The Remedial Design and Project Plans for this site were submitted for review on this date. This set of designs captures the remedies selected in the Decision Document for 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 2501.38.003.11.	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
3/14/2006	Update or Other Action	Draft Final Remedial Design and Project Plans received for this site. The Navy will be installing a product recovery trench along the eastern side of South Sweeper Creek to capture free product before it reaches the stream. Several free product recovery/groundwater monitoring wells will be installed in at several locations along the perimeter of the existing network in gaps.	Jason Weigle
3/20/2006	Update or Other Action	The draft annual groundwater monitoring report for 2005 was received on this date.	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
4/7/2006	Update or Other Action	Comments on the 2005 annual groundwater monitoring report submitted to the Navy. The 2005 monitoring event showed a lack of free product in the monitoring wells and a continued high level of contamination near wells 02-231 and E-216. 02-231 continues to show high levels of DRO, GRO, and benzene. Well 02-232 showed a slight increase in DRO concentration. Well E-216 showed a significant increase in DRO concentration from the last sampling round in 2003; free-product in the well prevented sampling in 2004. All other wells showed relatively stable concentrations below clean-up levels. More data is needed at the site to determin statistically significant trends to concentrations.	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
8/17/2006	Update or Other Action	Recieved the Final Decision Document.	Guy Warren
9/20/2006	Update or Other Action	The Decision Document for the South of Runway 18-36 area was signed.	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
12/27/2006	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
1/29/2007	Update or Other Action	Received the Draft "Closure Report, Remedial Action Construction at Three Petroleum Sites" report. The report details the result of field activities conducted during the 2006 field season.	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
2/28/2007	Update or Other Action	Submitted comments on the Draft Closure Report. The report detailed the installation of a product recovery trench and installation of product recovery equipment in the trench and in other product recovery wells on the site.	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 does not support discontinuation of sampling at the majority of the site wells. ADEC recommends reducing sampling frequency at wells 18/36-05, E-208, and MRP-12 to biennially, and reducing frequency of BTEX analysis to biennial at wells 18/36-03, 02-232 and E-218.	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 reducing sampling to every odd year at 3 wells, and adding BTEX monitoring to the list of analytes for 3 other wells at the 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 concurs that the monitoring program should continue as planned for this site.	Meghan Dooley
8/21/2009	Update or Other Action	The Final 2008 Annual Groundwater Monitoring Report was received on this date. The Navy recommends removing well 28-808 from the monitoring list and does not need to replace it as there are 10 other wells and piezometers located within 200 feet of the former well location.	Meghan Dooley
2/3/2010	Update or Other Action	Submitted comments to the Navy on the Draft Remedial Action Summary Report, Free Product Recovery. The report summarizes the results of montly (Oct 08-Sept 09) Free Product Recovery activities at the site. While the majority of the recovery wells have met the ROD requirement to cease product recovery several of the sumps in the recovery trench still have measureable quantities of Free Product. Free Product recovery will continue at this site.	Guy Warren
3/12/2010	Update or Other Action	The draft 2009 Annual Groundwater Monitoring Report was received on this date. The Navy recommends discontinuing monitoring for GRO at all sampling locations, discontinuing sampling at upgradient wells MRP-12, 18/36-05, E-206, and sampling wells E-218 and 02-2325 for BTEX annually so TAH and TAqH can be assessed.	Meghan Dooley
4/15/2010	Update or Other Action	Comments for the draft 2009 Annual Groundwater Monitoring Report were sent on this date. General concerns include: selection of wells for measurement of the depth to groundwater to determine groundwater flow, and elevated levels of DRO at the sediment sample locations NSWSD-1 and NSWSD-2. ADEC concurs with the cessation of GRO analysis at the site, and eliminating DRO analysis from wells MRP-12, 18/36-05 and E-206 however continuing water level/free product monitoring. ADEC recommends a meeting to discuss monitoring optimization at the site.	Meghan Dooley
12/3/2010	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 74423 abandoned fuel lines.	Meghan Dooley
1/20/2011	Document, Report, or Work plan Review - other	ADEC recieved the Free Product Recovery Summary Report on December 27, 2010 and sent comments on January 20, 2010. The report recommended decreasing free product recovery efforts and boom maintenance from monthly to 6 times per year.	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. There were no observed problems with ICs at this site.	Meghan Dooley
3/17/2011	Institutional Control Record Established	Institutional Controls established and entered into the database.	Guy Warren
5/12/2011	Document, Report, or Work plan Review - other	The Final Remedial Action Summary Report- Free Product Recovery was received. The report recommends reducing recovery activities to six visits per year, and beginning periodic monitoring and product recovery at wells E-215, RW-18/36-04, and Z3-2 since greater than 0.15 foot of product was observed during the september long term monitoring event in 2010. Periodic monitoring and product recovery will condinue at the 8 recovery sumps and 6 wells. Boom inspection will be discontinued at boom location 1 and location 5 becuase they are no longer necessary to control sheen. It will continue at all remaining booms located in the East and West Canals and South Sweeper Creek on a regular basis as there is on site personell to conduct maintenance.	Meghan Dooley
5/12/2011	Document, Report, or Work plan Review - other	The Final 2010 IC Site Inspection Report was received by ADEC. IC's appear to be functioning as intended for this site.	Meghan Dooley
6/27/2011	CERCLA ROD Periodic Review	The draft Third 5-Year Review was received. The purpose of the 5-Year Review is to evaluate the effectiveness of the remedy and determine if further action is warranted to protect human health and the environment. The document listed actions taken to address issues from the previous 5-Year Review, and offered new recommendations based on data collected from 2006 to 2010 from Operable Units A and B-1. It concluded that the remedy is functioning as intended at all but 4 sites and provided the following area-wide recommendations: 1. Update the current Comprehensive Monitoring Plan, Institutional Control Monitoring Plan, Operation and maintenance Plan, 2. Update the document repositories, 3. Assess and update as necessary the Community Relations Plan, and 4. Address action items identified during 2010 site inspections. The 5-Year Review recommends conducting trend analysis for TAH and TAqH, discontinuing surface water monitoring at NSWSD-01 through NSWSD-08, and increasing the well network to include wells within the source area and those with free product. It is recommended that trend analysis be conducted for sediment sampling and that all other monitoring continue as prescribed at South of Runway 18-36. It is also recommended that free product recovery be decreased to six times per year.	Meghan Dooley
7/11/2011	Document, Report, or Work plan Review - other	The Final 2010 Annual Groundwater Monitoring Report was received. The report discontinuing monitoring at piezometers 28-804 and 28-812, discontinuing surface water monitoring at locations NSWSD-01 through NSWSD-06, and discontinuing sediment sampling at locations NSWSD-01, NSWSD-03, NSWSD-06, NSWSD-07, and NSWSD-08. Concentrations have remained below endpoint criteria at these surface water and sediment locations since 2006 and 2007, respectively. Additionally, NSWSD-01 and NSWSD-03 sediment samples provided redundant information to NSWSD-02. Piezometer 28-812 was found to be damaged and unable to sample, and piezometer 28-804 was unneccesary for determining the potentimetric surface and not ideal for water quality sampling.	Meghan Dooley
9/27/2011	Document, Report, or Work plan Review - other	ADEC reviewed and approved the Operations and Maintenance Plan for free product recovery. The plan addresses wells to be included in the free product recovery program and sites for boom maintenance.	Meghan Dooley
12/16/2011	Document, Report, or Work plan Review - other	ADEC reviewed and sent comments on the daft Remedial Action Summary Report, Free Product Recovery. The report discusses free product activities from October 2010 to September 2011 for sites South of Runway 19-36 and SWMU 62. The report recommends discontinuing the monthly 0free product monitoring and recovery efforts at South of Runway 18-36 site. The site has met the practical endpoint spelled out in the OU A ROD of recovering no more than 5 gallons per rolling 6 months. A second endpoint for the site is that no measureable product (less than 0.1 feet) can be detected in the recovery trench in a 12 month period. No product was detected in the recovery trench at South of Runway 18-36 from August 2010 through August 2011, however 0.1 feet were detected in one well in the trench in September 2011. In addition to discontinuing monitoring here, the report recommends removing boom 7 from the culvert at the mouth of Sweeper Creek as it has not reovered product and no sheen has been observed in approximately 18 months.	Meghan Dooley
10/16/2012	Document, Report, or Work plan Review - other	Submit acceptance letter for the final 2011 annual ground water monitoring report. Recomendations for SR 18/36 include discontinuation of DRO sampling at most site wells, reductions in the number of wells monitored for the presence of free product, and reduction in TAH TaqH analysis.	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 reducing monitoring 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.	Meghan Dooley
9/8/2014	Document, Report, or Work plan Review - other	Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. DRO continues to exceed endpoint criteria in shoreline sediments and TAH and TAqH continue to exceed endpoint criteria in surface water protection wells. In general concentrations and the occurrence of free product have decreased across the site. Surface water sampling (no exceedances in 5 years) will be discontinued and analytes for sediment sampling will be reduced.	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. 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. The report recommends minor adjustments to the monitoring program, including elimination of DRO sampling at one location. All other monitoring at the site will continue as free product continues to be observed in site wells and TAH and TAqH continue to exceed surface water protection standards.	Guy Warren
7/16/2017	Site Visit	ADEC completed a three day site visit to Adak NAVFAC. All active sites were visited and current status discussed at length with NAVFAC representatives. Current field work activities were observed and noted. Work plan activities were proceeding as scheduled. No work plan deviations were evident.	Darren Mulkey
5/23/2018	Site Characterization Report Approved	Annual Groundwater and Landfill Monitoring Report, 2017 Long-Term Monitoring, Operable Unit A was finalized. Natural attenuation of petroleum hydrocarbons has been demonstrated on Adak. As a result, the CMP, Revision 6 (Navy 2014) prescribed natural attenuation parameter (NAP) monitoring once every 5 years. This monitoring was last conducted in 2014 at all MNA sites.	Darren Mulkey
9/13/2018	Document, Report, or Work plan Review - other	Approved the 2019 Final Operation and Maintenance Plan, Free Product Recovery, Operation and Maintenance, Former Naval Complex, Adak, AK 8 August, 2018. O&M activities related to free product fuel recovery at six sites: Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak Area; Former Power Plant, Building T-1451; Naval Mobile Construction Battalion (NMCB) Expanded Area; Source Area (SA) 80, Steam Plant 4; South of Runway 18-36 Area; and SWMU 60, Tank Farm A. Oil-sorbent boom maintenance activities (for protection of surface waters) at selected locations in East Canal and South Sweeper Creek.	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. DRO continues to exceed endpoint criterion in shoreline sediments, and TAH and TAqH continue to exceed endpoint criteria in two surface water protection wells. Because of the continued exceedance of endpoint criterion for DRO in sediment, the continued exceedance of endpoint criteria for TAH and TAqH in surface water protection wells, and the observance of free product in other site wells, it is recommended groundwater and sediment monitoring at the site be continued as prescribed.	Darren Mulkey
5/28/2019	Conceptual Site Model Submitted	Received the Final Conceptual Site Model for light Non-Aqueous Phase Liquid and Dissolved Petroleum Constituents, East Canal, Former Adak Naval Complex, Adak Island, Alaska dated May 2019. The Navy implements a light non-aqueous phase liquid (LNAPL) recovery program across several sites in the downtown Adak area where LNAPL and its dissolved phase constituents are present in groundwater and may impact nearby surface water bodies. East Canal, located along the eastern margin of Runway 18-36 south of the airport terminal building, is one such water body where LNAPL seeps have been noted and efforts have been undertaken to contain a hydrocarbon sheen on the water surface in the canal. Sites known to contain petroleum hydrocarbon contamination in the vicinity of East Canal include Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak (SWMU 62); Former Power Plant, Building T-1451 (Former Power Plant); Area 303, General Communications, Inc. (GCI) Compound (Area 303); Naval Mobile Construction Battalion (NMCB) Building T-1416; and South of Runway 18-36 (Figure 1-2). Historically, these sites have been evaluated and addressed individually. The purpose of this report is to holistically evaluate East Canal and the sites surrounding it to develop an updated CSM for LNAPL and associated dissolved phase constituents that can be used to make informed decisions to facilitate management and environmental restoration of the area.	Darren Mulkey
7/11/2019	Update or Other Action	Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map.	Rebekah Reams
12/30/2019	Document, Report, or Work plan Review - other	Draft 2019 Remedial Action Summary Report, Free Product Recovery, SWMU 62 New Housing Fuel Leak Area and Additional Sites, Former Naval Complex, Adak, Alaska, December 11, 2019. This report summarizes the monitoring and remedial action activities completed during the period from October 2018 through September 2019 and whether endpoint criteria were achieved as established by the United States Navy, United States Environmental Protection Agency, and Alaska Department of Environmental Conservation in Records of Decision. During monthly free product recovery activities for the reporting period, a total of 3.24 gallons of free product were recovered from monitoring wells at Solid Waste Management Unit 62, New Housing Fuel Leak Area (Eagle Bay Housing). During the reporting period, measurable free product was recovered from four of the monitoring wells. The site has currently achieved the Operable Unit A Record of Decision practical endpoint for a passive recovery system as a result of the 2016 removal action conducted by the Navy, which removed the recovery trench, recovery sumps, petroleum-impacted soil, and accumulated product adjacent to East Canal. The monthly volume of recovered product, averaged over the most recent 6 months (6-month moving average), remained below 5 gallons per month since January 2016, and remained below the endpoint criteria for the entire reporting period. However, the requirement for the occurrence of product in the replacement monitoring wells has not met the remedial objective of less than 0.01 foot for a 1-year period. In two of the removal action monitoring wells, product was observed at greater than the Record of Decision endpoint of 0.01 foot from October 2018 through September 2019. During the free product recovery activities for the reporting period, a total of 10.33 gallons of free product were recovered from monitoring wells at five additional petroleum sites: Former Power Plant, Building T-1451; Naval Mobile Construction Battalion Building T- 1416 Expanded Area; Source Area 80, Steam Plant 4; South of Runway 18-36 Area; and Solid Waste Management Unit 60, Tank Farm A. At the request of the Alaska Department of Environmental Conservation, free product monitoring and recovery is conducted at select wells at these sites, which do not have defined specific endpoint criteria for free product.	Darren Mulkey
1/10/2022	Document, Report, or Work plan Review - other	"Final Remedial Action Summary Report, Free Product Recovery, SWMU 62 New Housing Fuel Leak Area and Additional Sites, Former Naval Complex, Adak, Alaska, 21 December 2021". During periodic free product recovery activities for the reporting period, a total of 2.15 gallons of free product were recovered from monitoring wells at Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak Area (Eagle Bay Housing). During the reporting period, measurable free product was recovered from three of the monitoring wells. The site has currently achieved the Operable Unit (OU) A Record of Decision (ROD) practical endpoint for a passive recovery system as a result of the 2016 removal action conducted by the Navy, which removed the recovery trench, recovery sumps, petroleum-impacted soil, and accumulated product adjacent to East Canal. The volume of recovered product, averaged over the most recent six months (six-month moving average), remained below five gallons per month since January 2016, and remained below the endpoint criteria for the entire reporting period. However, the requirement for the occurrence of product in the replacement monitoring wells has not met the remedial objective of less than 0.01 foot for a one-year period (Navy 2006). In one of the removal action monitoring wells, product was observed at greater than the ROD endpoint of 0.01 foot from October 2020 through September 2021.	Darren Mulkey
1/10/2022	Document, Report, or Work plan Review - other	This O&M Plan defines the free product recovery activities at the sites for the contract year (CY) from October 2021 through September 2022. The plan incorporates information obtained from past remedial action and long-term monitoring (LTM) reports. This plan also incorporates recommendations provided in Focused Feasibility Studies (FFS) for the NMCB Building T-1416 Expanded Area and SWMU 62, New Housing Fuel Leak Area, Eagle Bay Housing (Department of the Navy [DON] 2005a and 2005b); recommendations from past Annual Remedial Action Summary Reports for Free Product Recovery; and the U.S. Navy (Navy) scope of work for this contract.	Darren Mulkey

Action Date

Action

Description

DEC Staff

4/15/2000

Site Added to Database

Petroleum.

Elim Yoon

4/15/2000

Record of Decision

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

Elim Yoon

3/1/2003

Update or Other Action

The Final 2001 Annual Groundwater Monitoring Report was received on this date. GRO and DRO were observed at concentrations above OU-A ROD cleanup criteria. Navy recommends continued sentinel monitoring as well as an expedited focused feasibility study.

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 considered 'risk' free-product site and is undergoing a separate risk assessment and site characterization process.

Jason Weigle

9/7/2004

Update or Other Action

The Final 2003 Annual Groundwater Monitoring Report was received on this date. DRO, GRO, and benzene were measured at levels above endpoint criteria at certain wells. Navy recommends continuing monitoring as scheduled.

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

2/9/2005

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. Most of this AOC is located within the flight safety zone at the end of the runway.

Jason Weigle

2/16/2005

Update or Other Action

Site characterization and risk assessment recieved. Both documents include updated information on free product recovery and monitoring that has occured since previous versions of the documents came out.

Jason Weigle

2/17/2005

Update or Other Action

2004 Annual Monitoring report received.

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

3/7/2005

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

3/9/2005

Update or Other Action

Completed review of site characterization and risk assessment for this site. Comments were sent to Navy regarding the reports.

Jason Weigle

5/23/2005

Update or Other Action

The Final 2004 Annual Groundwater Monitoring Report was received on this date. Because of increasing trends in wells near South Sweeper Creek, the Navy will visually inspect the shoreline for seeps and sheen during the 2005 event. The Navy will also attempt to remove the obstruction in well E-216, however if it is unsuccessful the Navy will commence monitoring at location 18/36-02.

Meghan Dooley

7/19/2005

Site Characterization Report Approved

Focused Feasibility Study comments submitted to the Navy on July 19, 2005. Document included Site Characterization, Risk Assessment, Remedial Investigation, and Feasibility Study.

Jason Weigle

7/19/2005

Risk Assessment Report Approved

Focused Feasibility Study comments submitted to the Navy on July 19, 2005. Document included Site Characterization, Risk Assessment, Remedial Investigation, and Feasibility Study.

Jason Weigle

9/30/2005

Update or Other Action

Draft Proposed Plan received for review

Jason Weigle

11/14/2005

Proposed Plan

The proposed plan for this site was approved on this date.

Jason Weigle

12/13/2005

Update or Other Action

The Proposed Plan was made available for public comment on this date. January 13 is the end of the comment period.

Jason Weigle

12/21/2005

Update or Other Action

The Remedial Design and Project Plans for this site were submitted for review on this date. This set of designs captures the remedies selected in the Decision Document for 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 2501.38.003.11.

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

3/14/2006

Update or Other Action

Draft Final Remedial Design and Project Plans received for this site. The Navy will be installing a product recovery trench along the eastern side of South Sweeper Creek to capture free product before it reaches the stream. Several free product recovery/groundwater monitoring wells will be installed in at several locations along the perimeter of the existing network in gaps.

Jason Weigle

3/20/2006

Update or Other Action

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

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

4/7/2006

Update or Other Action

Comments on the 2005 annual groundwater monitoring report submitted to the Navy. The 2005 monitoring event showed a lack of free product in the monitoring wells and a continued high level of contamination near wells 02-231 and E-216. 02-231 continues to show high levels of DRO, GRO, and benzene. Well 02-232 showed a slight increase in DRO concentration. Well E-216 showed a significant increase in DRO concentration from the last sampling round in 2003; free-product in the well prevented sampling in 2004. All other wells showed relatively stable concentrations below clean-up levels. More data is needed at the site to determin statistically significant trends to concentrations.

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

8/17/2006

Update or Other Action

Recieved the Final Decision Document.

Guy Warren

9/20/2006

Update or Other Action

The Decision Document for the South of Runway 18-36 area was signed.

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

12/27/2006

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

1/29/2007

Update or Other Action

Received the Draft "Closure Report, Remedial Action Construction at Three Petroleum Sites" report. The report details the result of field activities conducted during the 2006 field season.

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

2/28/2007

Update or Other Action

Submitted comments on the Draft Closure Report. The report detailed the installation of a product recovery trench and installation of product recovery equipment in the trench and in other product recovery wells on the site.

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 does not support discontinuation of sampling at the majority of the site wells. ADEC recommends reducing sampling frequency at wells 18/36-05, E-208, and MRP-12 to biennially, and reducing frequency of BTEX analysis to biennial at wells 18/36-03, 02-232 and E-218.

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 reducing sampling to every odd year at 3 wells, and adding BTEX monitoring to the list of analytes for 3 other wells at the 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 concurs that the monitoring program should continue as planned for this site.

Meghan Dooley

8/21/2009

Update or Other Action

The Final 2008 Annual Groundwater Monitoring Report was received on this date. The Navy recommends removing well 28-808 from the monitoring list and does not need to replace it as there are 10 other wells and piezometers located within 200 feet of the former well location.

Meghan Dooley

2/3/2010

Update or Other Action

Submitted comments to the Navy on the Draft Remedial Action Summary Report, Free Product Recovery. The report summarizes the results of montly (Oct 08-Sept 09) Free Product Recovery activities at the site. While the majority of the recovery wells have met the ROD requirement to cease product recovery several of the sumps in the recovery trench still have measureable quantities of Free Product. Free Product recovery will continue at this site.

Guy Warren

3/12/2010

Update or Other Action

The draft 2009 Annual Groundwater Monitoring Report was received on this date. The Navy recommends discontinuing monitoring for GRO at all sampling locations, discontinuing sampling at upgradient wells MRP-12, 18/36-05, E-206, and sampling wells E-218 and 02-2325 for BTEX annually so TAH and TAqH can be assessed.

Meghan Dooley

4/15/2010

Update or Other Action

Comments for the draft 2009 Annual Groundwater Monitoring Report were sent on this date. General concerns include: selection of wells for measurement of the depth to groundwater to determine groundwater flow, and elevated levels of DRO at the sediment sample locations NSWSD-1 and NSWSD-2. ADEC concurs with the cessation of GRO analysis at the site, and eliminating DRO analysis from wells MRP-12, 18/36-05 and E-206 however continuing water level/free product monitoring. ADEC recommends a meeting to discuss monitoring optimization at the site.

Meghan Dooley

12/3/2010

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 74423 abandoned fuel lines.

Meghan Dooley

1/20/2011

Document, Report, or Work plan Review - other

ADEC recieved the Free Product Recovery Summary Report on December 27, 2010 and sent comments on January 20, 2010. The report recommended decreasing free product recovery efforts and boom maintenance from monthly to 6 times per year.

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. There were no observed problems with ICs at this site.

Meghan Dooley

3/17/2011

Institutional Control Record Established

Institutional Controls established and entered into the database.

Guy Warren

5/12/2011

Document, Report, or Work plan Review - other

The Final Remedial Action Summary Report- Free Product Recovery was received. The report recommends reducing recovery activities to six visits per year, and beginning periodic monitoring and product recovery at wells E-215, RW-18/36-04, and Z3-2 since greater than 0.15 foot of product was observed during the september long term monitoring event in 2010. Periodic monitoring and product recovery will condinue at the 8 recovery sumps and 6 wells. Boom inspection will be discontinued at boom location 1 and location 5 becuase they are no longer necessary to control sheen. It will continue at all remaining booms located in the East and West Canals and South Sweeper Creek on a regular basis as there is on site personell to conduct maintenance.

Meghan Dooley

5/12/2011

Document, Report, or Work plan Review - other

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

Meghan Dooley

6/27/2011

CERCLA ROD Periodic Review

The draft Third 5-Year Review was received. The purpose of the 5-Year Review is to evaluate the effectiveness of the remedy and determine if further action is warranted to protect human health and the environment. The document listed actions taken to address issues from the previous 5-Year Review, and offered new recommendations based on data collected from 2006 to 2010 from Operable Units A and B-1. It concluded that the remedy is functioning as intended at all but 4 sites and provided the following area-wide recommendations: 1. Update the current Comprehensive Monitoring Plan, Institutional Control Monitoring Plan, Operation and maintenance Plan, 2. Update the document repositories, 3. Assess and update as necessary the Community Relations Plan, and 4. Address action items identified during 2010 site inspections. The 5-Year Review recommends conducting trend analysis for TAH and TAqH, discontinuing surface water monitoring at NSWSD-01 through NSWSD-08, and increasing the well network to include wells within the source area and those with free product. It is recommended that trend analysis be conducted for sediment sampling and that all other monitoring continue as prescribed at South of Runway 18-36. It is also recommended that free product recovery be decreased to six times per year.

Meghan Dooley

7/11/2011

Document, Report, or Work plan Review - other

The Final 2010 Annual Groundwater Monitoring Report was received. The report discontinuing monitoring at piezometers 28-804 and 28-812, discontinuing surface water monitoring at locations NSWSD-01 through NSWSD-06, and discontinuing sediment sampling at locations NSWSD-01, NSWSD-03, NSWSD-06, NSWSD-07, and NSWSD-08. Concentrations have remained below endpoint criteria at these surface water and sediment locations since 2006 and 2007, respectively. Additionally, NSWSD-01 and NSWSD-03 sediment samples provided redundant information to NSWSD-02. Piezometer 28-812 was found to be damaged and unable to sample, and piezometer 28-804 was unneccesary for determining the potentimetric surface and not ideal for water quality sampling.

Meghan Dooley

9/27/2011

Document, Report, or Work plan Review - other

ADEC reviewed and approved the Operations and Maintenance Plan for free product recovery. The plan addresses wells to be included in the free product recovery program and sites for boom maintenance.

Meghan Dooley

12/16/2011

Document, Report, or Work plan Review - other

ADEC reviewed and sent comments on the daft Remedial Action Summary Report, Free Product Recovery. The report discusses free product activities from October 2010 to September 2011 for sites South of Runway 19-36 and SWMU 62. The report recommends discontinuing the monthly 0free product monitoring and recovery efforts at South of Runway 18-36 site. The site has met the practical endpoint spelled out in the OU A ROD of recovering no more than 5 gallons per rolling 6 months. A second endpoint for the site is that no measureable product (less than 0.1 feet) can be detected in the recovery trench in a 12 month period. No product was detected in the recovery trench at South of Runway 18-36 from August 2010 through August 2011, however 0.1 feet were detected in one well in the trench in September 2011. In addition to discontinuing monitoring here, the report recommends removing boom 7 from the culvert at the mouth of Sweeper Creek as it has not reovered product and no sheen has been observed in approximately 18 months.

Meghan Dooley

10/16/2012

Document, Report, or Work plan Review - other

Submit acceptance letter for the final 2011 annual ground water monitoring report. Recomendations for SR 18/36 include discontinuation of DRO sampling at most site wells, reductions in the number of wells monitored for the presence of free product, and reduction in TAH TaqH analysis.

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 reducing monitoring 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.

Meghan Dooley

9/8/2014

Document, Report, or Work plan Review - other

Received, Final 2013 Annual Groundwater and Landfill Monitoring Report for Adak Alaska. DRO continues to exceed endpoint criteria in shoreline sediments and TAH and TAqH continue to exceed endpoint criteria in surface water protection wells. In general concentrations and the occurrence of free product have decreased across the site. Surface water sampling (no exceedances in 5 years) will be discontinued and analytes for sediment sampling will be reduced.

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. 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. The report recommends minor adjustments to the monitoring program, including elimination of DRO sampling at one location. All other monitoring at the site will continue as free product continues to be observed in site wells and TAH and TAqH continue to exceed surface water protection standards.

Guy Warren

7/16/2017

Site Visit

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

Darren Mulkey

5/23/2018

Site Characterization Report Approved

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

Darren Mulkey

9/13/2018

Document, Report, or Work plan Review - other

Approved the 2019 Final Operation and Maintenance Plan, Free Product Recovery, Operation and Maintenance, Former Naval Complex, Adak, AK 8 August, 2018. O&M activities related to free product fuel recovery at six sites: Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak Area; Former Power Plant, Building T-1451; Naval Mobile Construction Battalion (NMCB) Expanded Area; Source Area (SA) 80, Steam Plant 4; South of Runway 18-36 Area; and SWMU 60, Tank Farm A. Oil-sorbent boom maintenance activities (for protection of surface waters) at selected locations in East Canal and South Sweeper Creek.

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. DRO continues to exceed endpoint criterion in shoreline sediments, and TAH and TAqH continue to exceed endpoint criteria in two surface water protection wells. Because of the continued exceedance of endpoint criterion for DRO in sediment, the continued exceedance of endpoint criteria for TAH and TAqH in surface water protection wells, and the observance of free product in other site wells, it is recommended groundwater and sediment monitoring at the site be continued as prescribed.

Darren Mulkey

5/28/2019

Conceptual Site Model Submitted

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

Darren Mulkey

7/11/2019

Update or Other Action

Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map.

Rebekah Reams

12/30/2019

Document, Report, or Work plan Review - other

Draft 2019 Remedial Action Summary Report, Free Product Recovery, SWMU 62 New Housing Fuel Leak Area and Additional Sites, Former Naval Complex, Adak, Alaska, December 11, 2019. This report summarizes the monitoring and remedial action activities completed during the period from October 2018 through September 2019 and whether endpoint criteria were achieved as established by the United States Navy, United States Environmental Protection Agency, and Alaska Department of Environmental Conservation in Records of Decision. During monthly free product recovery activities for the reporting period, a total of 3.24 gallons of free product were recovered from monitoring wells at Solid Waste Management Unit 62, New Housing Fuel Leak Area (Eagle Bay Housing). During the reporting period, measurable free product was recovered from four of the monitoring wells. The site has currently achieved the Operable Unit A Record of Decision practical endpoint for a passive recovery system as a result of the 2016 removal action conducted by the Navy, which removed the recovery trench, recovery sumps, petroleum-impacted soil, and accumulated product adjacent to East Canal. The monthly volume of recovered product, averaged over the most recent 6 months (6-month moving average), remained below 5 gallons per month since January 2016, and remained below the endpoint criteria for the entire reporting period. However, the requirement for the occurrence of product in the replacement monitoring wells has not met the remedial objective of less than 0.01 foot for a 1-year period. In two of the removal action monitoring wells, product was observed at greater than the Record of Decision endpoint of 0.01 foot from October 2018 through September 2019. During the free product recovery activities for the reporting period, a total of 10.33 gallons of free product were recovered from monitoring wells at five additional petroleum sites: Former Power Plant, Building T-1451; Naval Mobile Construction Battalion Building T- 1416 Expanded Area; Source Area 80, Steam Plant 4; South of Runway 18-36 Area; and Solid Waste Management Unit 60, Tank Farm A. At the request of the Alaska Department of Environmental Conservation, free product monitoring and recovery is conducted at select wells at these sites, which do not have defined specific endpoint criteria for free product.

Darren Mulkey

1/10/2022

Document, Report, or Work plan Review - other

"Final Remedial Action Summary Report, Free Product Recovery, SWMU 62 New Housing Fuel Leak Area and Additional Sites, Former Naval Complex, Adak, Alaska, 21 December 2021". During periodic free product recovery activities for the reporting period, a total of 2.15 gallons of free product were recovered from monitoring wells at Solid Waste Management Unit (SWMU) 62, New Housing Fuel Leak Area (Eagle Bay Housing). During the reporting period, measurable free product was recovered from three of the monitoring wells. The site has currently achieved the Operable Unit (OU) A Record of Decision (ROD) practical endpoint for a passive recovery system as a result of the 2016 removal action conducted by the Navy, which removed the recovery trench, recovery sumps, petroleum-impacted soil, and accumulated product adjacent to East Canal. The volume of recovered product, averaged over the most recent six months (six-month moving average), remained below five gallons per month since January 2016, and remained below the endpoint criteria for the entire reporting period. However, the requirement for the occurrence of product in the replacement monitoring wells has not met the remedial objective of less than 0.01 foot for a one-year period (Navy 2006). In one of the removal action monitoring wells, product was observed at greater than the ROD endpoint of 0.01 foot from October 2020 through September 2021.

Darren Mulkey

1/10/2022

Document, Report, or Work plan Review - other

This O&M Plan defines the free product recovery activities at the sites for the contract year (CY) from October 2021 through September 2022. The plan incorporates information obtained from past remedial action and long-term monitoring (LTM) reports. This plan also incorporates recommendations provided in Focused Feasibility Studies (FFS) for the NMCB Building T-1416 Expanded Area and SWMU 62, New Housing Fuel Leak Area, Eagle Bay Housing (Department of the Navy [DON] 2005a and 2005b); recommendations from past Annual Remedial Action Summary Reports for Free Product Recovery; and the U.S. Navy (Navy) scope of work for this contract.

Darren Mulkey

Contaminant Information

Name

Level Description

Media

Comments

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
Groundwater Monitoring	The Comprehensive Monitoring Plan Rev. 4 requires annual groundwater monitoring to ensure the effectiveness of the remedy and the protection of human health and the environment.
Groundwater Use Restrictions	Equitable servitude of the Interim Coneveyance restricts the use of groundwater for domestic purposes.
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.
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.

Description

Details

Groundwater Monitoring

The Comprehensive Monitoring Plan Rev. 4 requires annual groundwater monitoring to ensure the effectiveness of the remedy and the protection of human health and the environment.

Groundwater Use Restrictions

Equitable servitude of the Interim Coneveyance restricts the use of groundwater for domestic purposes.

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.

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.

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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Site Report: Adak South of Runway 18-36 Area

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