Site Report: Eareckson Air Station ST46

Site Name:	Eareckson Air Station ST46
Address:	Abandoned Tank Farm, Amchitka, AK 99546
File Number:	2649.38.001, 2649.38.037
Hazard ID:	2847
Status:	Active
Staff:	Erica Blake, 9074512182 erica.blake@alaska.gov
Latitude:	52.733925
Longitude:	174.091439
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

Eareckson AS is situated on Shemya Island, approximately 1,500 miles southwest of Anchorage, Alaska at the westernmost tip of the Aleutian Islands. Shemya Island is part of the Near Islands group of the Aleutian Archipelago. The U.S. Army first developed facilities on Shemya Island in 1943 to support operations against the Japanese occupation forces on the nearby islands of Attu, Agattu, and Kiska. In 1954, the site was deactivated, and was turned over to the Civil Aeronautics Authority in 1955. In 1958, the Air Force returned to Shemya Island to support various Air Force and Army strategic intelligence gathering activities. It has remained active in this capacity to the present. In 1995, the station was downsized and reverted to caretaker status and a private operation and maintenance contractor took control of the facility under contract to the Air Force. Shemya Island is owned by the U.S. Government and is under the jurisdiction of the United States Fish and Wildlife Service (USFWS) as part of the Alaska Maritime National Wildlife Refuge. The ST046 Tank Farm originally consisted of numerous, large capacity ASTs used to provide diesel fuel to the Power Plant. The Tank Farm is located between North Road and North Beach Road on the northwest portion of the island. Currently, only three ASTs remain at the site to provide storage requirements for the Power Plant. Thirty-six of the ASTs were removed during the mid-1980s. All other ASTs at ST046 were removed in 1994. In addition, the abandoned pipeline network connecting the former ASTs was removed in 1994 and 1995. Base back-up wells within tank farm have been isolated from the base drinking water system.

Action Information

Action Date	Action	Description	DEC Staff
11/1/1982	Update or Other Action	Recoverable, Reclaimable, and Waste Petroleum Product Management Plan 19-14. This plan includes the ST46 Tank Farm used to provide diesel fuel to the Power Plant. Spills from the tank farm flowed along a drainage ditch to the stream along North Road (SS007) and into a lagoon behind the beach at Alcan Bay.	Former Staff
9/1/1984	Preliminary Assessment Approved	Installation Restoration Program, Phase I Records Search, 5073rd Air Base Group, Shemya Air Force Base, Alaska (dated September 1984) prepared by JRB Associates. This report includes the Tank Farm ST46 site, which is also mentioned as PS-4, Diesel Tank No. 123. The tank farm was noted to have sustained corrosion and structural damage. The facility was in need of repair or replacement. It was recommended that tank repairs be made quickly. All the oil contaminated soils within the bermed tank farm and the drainage ditch (SS007) were to be excavated. Spill controls were to be installed at the facility, including an impermeable liner.	Former Staff
11/22/1985	Update or Other Action	CH2M Hill Trip Report dated 1985. Diesel oil tank farm is located on the northwest corner of the island. Three generations of storage tanks appear to have been constructed in this area. The earliest tanks are so rusted that only portions of their steel skeletons remain. Approximately 16 "second-generation" tanks were observed, scattered over the hillside in clusters of two. The newest tanks are designated numbers 104, 105, 109, 110, 111, 119, 120, 121, 122, and 123. Tank 123 was repaired and refurbished during FY 1985. Appear to have been many spills of diesel fuel in the tank farm area.	Former Staff
6/1/1986	Update or Other Action	Phase II - Task I Presurvey Report, Shemya Air Force Base and King Salmon Air Force Station. Two backup drinking water wells were located within the tank farm area, Well No. 29 at Building 410 and Well No. 4 located at Building 400. The wells draw water from the less accessible fractured bedrock aquifer. The wells were noted to be at risk from spills of PCB oils, fuels, and degreasing solvents from the Cobra Dane facility. Water sampled from both wells in both 1958 by the USACE and 1984 by the USAF showed PCB contamination (1 microgram/L) and trace petroleum product. A spill of 67,000 gallons of fuel oil was noted in 1984 from Tank 123.	Former Staff
9/25/1987	Update or Other Action	Shemya Field Trip Notes, September 15-19, 1987. Prepared by CH2M Hill. Tank 123 (ST08) located with ST046 was visited. There was no sign of spillage or leakage from the tank or fill/discharge lines. There was no oil sheen in the dike water or downstream of the sluice gate. The drums mentioned in the JRB report apparently had been moved. Fill material had been placed around the tank.	Former Staff
7/29/1988	Update or Other Action	Installation Restoration Program, Stage I Workplan, Shemya Air Force Base, Alaska. Prepared by CH2M Hill. The fuel tank farm consists of nine fuel storage tanks scattered over an area one-quarter mile in diameter. Most of the tanks sit in depressions formed during their construction; overburden soils were removed, and the tanks are founded on bedrock. The area contains several small leaks in tanks and piping and was the site of a 67,000 gallon spill from tank No. 123.	Former Staff
9/2/1988	Update or Other Action	Pollution Incident Report for Tank 123, ST008 at ST046. Approximately 50,000 gallons of diesel fuel was released from Tank 123 on August 31, 1988. The tank had ruptured, spilling fuel. The fuel was pumped to a dike and soil was removed around the tank.	Former Staff
10/1/1988	Update or Other Action	Evaluation of Lake at Shemya Air Force Base, Alaska. Technical memorandum prepared by Robert Binovi summarizing an evaluation of water samples collected from lakes at Shemya Island.	Former Staff
10/17/1988	Update or Other Action	Trip Report, Shemya Air Force Base, Alaska. Memorandum by Clare Jaeger (COE) summarizing the contamination discovered during soil and water sampling on October 6, 1988. The area of the diesel storage tanks centered around Tank 123. This tank has had two major spills of roughly 30,000 and 65,000 gallons in 1984 and 1988 respectively. The bulk of the fuel was recovered in both cases, but the floor of the dike is fuel saturated and fuel has wicked several feet up the dike. The fuel flowed from within the dike of Tank 123 by way of the drain into the drainage on the west side of the access road. For the remaining tanks, the dike floors of each are contaminated with fuel in varying degrees, and there is some degree of contamination in the dike walls. A monitoring well was installed in the area at the top of the hill where the natural drainage approaches the shoreline drive.	Former Staff
12/21/1988	Update or Other Action	POL Contamination Investigation, Diesel Tanks Phase I, Shemya Air Force Base, Alaska. Visual inspection of Tank 123 showed that the floor of the dike was fuel saturated. During the construction phase of Diesel Tanks Phase I, dewatering may become necessary and that water is likely to be contaminated with POLs. A map is included with the estimated POL contamination boundaries. Site of the new pumphouse has low levels of TRPHs and total xylenes.	Former Staff
1/20/1989	Update or Other Action	Well Numbers 4 and 29, Chemical Analyses and Pump Test, Shemya Air Force Base, Alaska. Memorandum by Thomas Delwyn (COE). Goal of this sampling program was to systematically collect water samples and record field data for a period of several weeks so that Well 4 and Well 29 could be evaluated as drinking water sources. Wells were checked daily and field measurements were made on seven occasions. A significant observation is that a noticeable sulfur odor developed in Well 29 after 2 days of pumping and the odor persisted throughout the 23 day test period. There were no organic compounds detected in excess of EPA/ADEC drinking water standards. Except for the hydrogen sulfide content, which can be treated to meet applicable requirements, these wells meets current drinking water requirements.	Former Staff
1/24/1989	Update or Other Action	POL Contamination Investigation, Diesel Tanks Phase II, Shemya Air Force Base, Alaska. Memorandum by Thomas Delwyn (COE) reporting on the Phase II petroleum, oil, and lubricant contamination investigation of diesel tanks. Contamination was found all around Tanks 104, 105, 110, 111, 119, 121, and 122. The contamination extends at least to a depth of 1.5 ft. The tanks appear to be built on top of hard rock, which provides at least a partial barrier. With only one bore hole per dike, it is impossible to define boundaries of POL contamination in the dike.	Former Staff
6/6/1989	Update or Other Action	FY-89 Diesel Storage Tanks (Schedule A), Add to and Alter Water System (Schedule B), Shemya AFB, POL Contamination. Memorandum by Dennis Hardy (COE) discussing the identification of additional POL contamination in soil and groundwater in the areas of diesel tanks 124 and 125, the POL pumphouse near tank 123, and the water gallery. In May 1989, six inches of floating POL product was found on top of the water table in two monitoring wells located between Tank 123 and the new POL Pumphouse. The COE does not know of any location in the vicinity of the new pumphouse which is not now contaminated by POL product.	Former Staff
7/6/1989	Update or Other Action	POL Contamination Investigations at Shemya Air Force Base, Alaska, 25 April through 3 June 1989. Memorandum by Thomas Delwyn (COE). Includes information on Diesel Tank Demo, Phase II and Diesel Tanks, Phase I. Two monitoring well were set up for Diesel Tanks Demo Phase II. One piezometer and one monitoring well near Tank 123 had floating fuel product.	Former Staff
11/8/1989	Update or Other Action	Diesel Tanks Demo, Phase II, Petroleum, Oil, Lubricant (POL) Contamination Investigation at Shemya Air Force Base, Alaska. Memorandum by Thomas Delwyn (COE) summarizing an investigation conducted in May 1989 in the ST46 tank farm area. Two monitoring wells were placed on the subject area. Existing monitor wells and piezometers near Tank 123 were measured for floating fuel product with an interface probe. Two piezometers did not show any fuel product. One piezometer and one monitor well had floating fuel product. Fuel sheens were observed on the standing water in the drainage between the oil separation ponds. Cleanup of discharged water during soil removal in the vicinity of Tank 123 will be necessary.	Former Staff
8/10/1990	Update or Other Action	Installation Restoration Program Stage 1 Final Technical Report submitted by CH2M Hill. Site PS-4 includes the perimeter area around Diesel Tank 123. The tanks sits in an unlined containment area constructed by excavating approximately 15 feet down. Depth to water is from 16 to 18 feet in this area. This is one of four sites recommended for the highest priority future investigations due to it potentially affecting the base water supply.	Former Staff
9/14/1990	Update or Other Action	Installation Restoration Program Stage 2 Final Work Plan submitted by CH2M Hill. No soil gas or geophysical investigations are planned for any of the four sites. 4 borings will be advanced at site PS-4, and up to two samples per boring will be submitted for analysis.	Former Staff
6/25/1991	Update or Other Action	Site Summaries for Shemya Air Force Base, Alaska Installation Restoration Program. Remedial design for PS-4 may include a subsurface drain system to collect and control leachate moving off site and/or a liner system within the containment area. With these controls, the amount of POL contamination reaching Pond 3 and the immediate vicinity of Tank 123 would be significantly reduced.	Dan Hartung
7/23/1991	Update or Other Action	Compliance Orders by Consent for Oil Discharge Prevention and Contingency Plan Submittals for King Salmon AFB and Shemya AFB bulk fuel facilities letter dated July 23, 1991 to 11th Air Force (Gene Gallogly, Chief of Environmental Planning Division) from ADEC (Svend Brandt-Erichsen, Regional Oil Program Coordinator).	Dan Hartung
7/26/1991	Update or Other Action	Notice of Violation / Request for Corrective Action letter to 5099th CEOS Air Force (Captain Kenneth Brown, Chief of Environmental Contract and Planning Section) from ADEC (Ron Klein, Manager of Regional Contaminated Sites) regarding numerous sites and the status of site assessments and remedial actions. PS-4 site listed as one of the sites that are currently causing pollution releases to the lands and waters of the state.	Dan Hartung
8/29/1991	Update or Other Action	(Old R:Base Action Code = REM - Removal / Excavation). Quest Environmental submits a QA/QC Project plan for the Schedule "A" POL system upgrade and Schedule "B" tank demolition document DACA 85-91-B-0011. No site map was included with submittal. Description of site was stated to be located within the Norhtwest portion of Shemya A.F.B. and contained within an area identified as being contaminated with petroleum product constituents from previous usage.	Former Staff
10/4/1991	Update or Other Action	Installation Restoration Program (IRP) Field Investigation Plan, Shemya Air Force Base, Alaska (2 volumes). The diked area of PS-4 is currently undergoing site remediation to remove contaminated soil and install a permanent dike/liner/drainage system. The investigation for PS-4 will be limited to an evaluation of groundwater based on three groundwater monitoring wells to be field-located.	Dan Hartung
5/20/1993	Update or Other Action	Status of Shemya Air Force Base in Relation to Proposal for the National Priorities List.	Ray Burger
12/1/1993	Update or Other Action	Eareckson Air Force Station (formerly Shemya AFB, Alaska) 1993 Installation Restoration Program Basewide and Limited Source Investigation Workplan. Prepared by Jacobs Engineering Group. Groundwater in the vicinity of ST46 will be evaluated as part of the 1993 basewide field investigation. Well points may provide some source-specific data. Further investigation may be required in 1994.	Ray Burger
12/15/1993	Update or Other Action	Oil and Hazardous Discharge Prevention and Contingency Plan, Shemya AFB, Alaska. Final Draft. Prepared by 11th Tactical Control Wing.	Ray Burger
8/1/1994	Update or Other Action	Community Relations Plan submitted by Jacobs Engineering. ST46 is considered to be a POL source area. The abandoned tank farm consisted of numerous large-capacity tanks previously used to provide diesel fuel to the power plant. Runoff from ST46 flows into the West End Oil/Water Separator Pond 3. Analytical results from the soil sampling indicate extensive POL contamination associated with the tank farm area.	Ray Burger
12/15/1994	Update or Other Action	Final Remedial Investigation, Workplan Addendum, 1994 Field Season, Eareckson Air Station, Alaska (formerly Shemya AFB, Alaska). Prepared by Jacobs Engineering Group. The nine aboveground storage tanks that comprise the ST46 tank farm are being removed during the 1994 field season. Although an LSI was not conducted at ST46 in 1993, groundwater at the source area was evaluated as part of the basewide program. Groundwater information at ST46 in 1993 indicated that contamination was present, but contaminant concentrations are below risk-based standards and/or pathways are incomplete. Objectives of the 1994 investigation are to characterize any soil contamination left in place following the removal actions, further evaluate the extent of groundwater contamination, and establish hydraulic control.	Ray Burger
1/15/1995	Update or Other Action	Addendum, Pipelines 1 and 2 Workplan, Eareckson AS.	Ray Burger
2/1/1995	Update or Other Action	Community Relations Photo Notebook; Remedial Investigations, Feasibility Studies and Remedial Actions. Last summer, the Air Force dismantled ten 500,000 gallon diesel fuel tanks at Source Area ST46. The inactive tanks, reportedly installed in the early 1950s, were once used to store diesel fuel for the Shemya power plan. Before dismantling, tank contents including sludges and scale, were removed and tank interiors were cleaned of all fuel residue. Tank sections have been stockpiled at Eareckson, awaiting transport off island by barge. Piping associated with the tank systems was also disconnected.	Ray Burger
2/15/1995	Interim Removal Action Approved	Eareckson AS, IRP Site ST46 - Abandoned Tank Farm (NW), Remove Abandoned Pipelines - Pipeline 1 and 2, Final Workplan, prepared by 611th CES/CEOR. An Air Force project is planned to remove two sets of abandoned pipeline from the northwest tank farm area, Eareckson AS. Pipeline 1 connected eight 480,000 gallon AST tanks that were removed in a FY94 project. Pipeline 2 is an aviation gas and/or diesel pipeline which connected eleven 480,000-, twelve 20,000-, and twenty-four 40,000 gallon tanks. The pipeline will be removed and decontaminated, and either shredded, crushed, or cut into sections for barge transport and retrograde at Seattle, Washington.	Ray Burger
3/15/1995	Interim Removal Action Approved	Eareckson AS, Aboveground Storage Tank (AST) Removal, Summary Report, Phase I (draft report only). Prepared by 611th CES/CEOR.	Ray Burger
4/15/1995	Update or Other Action	Revised 1994 Well Abandonment Summary Report. Prepared by Jacobs Engineering Group.	Ray Burger
8/1/1995	Update or Other Action	Technical Memorandum 1995 Field Activities submitted by Jacobs Engineering. Additional work at ST46 is limited to the collection of one groundwater sample from monitoring well MW-22 to continue the monitoring effort to evaluate increasing or decreasing concentrations of hazardous constituents. The sample will be analyzed for VOCs.	Ray Burger
8/1/1995	Update or Other Action	Remedial Investigation/Feasibility Study Report Volume I submitted by Jacobs Engineering. During air rotary activities at ST46, two deep monitoring wells were installed. In the ST46 Area of Management Zone 7, benzene in groundwater exceeded the MCL at two well locations adjacent to the base alternate water supply wells GW-400 and GW-410.	Ray Burger
9/1/1995	Update or Other Action	Field and Analytical Report for the Removal of Abandoned Pipelines 1 and 2, IRP Site ST46 - Abandoned Tank Farm (NW) were submitted by the USAF. The 611 CES/CEOR removed approximately 20,000 feet of abandoned petroleum pipelines at the Eareckson AS from March to July 1995. Upon removal, the Pipeline 1 was decontaminated and shipped to Defense Reutilization Marketing Office (DRMO). The Pipeline 2, the older pipeline, did not have any recycling value and was disposed of in the local landfill. During the pipeline removal soils in the immediate vicinity were examined for petroleum contamination, and soil samples were collected at places with possible contamination. Contaminated soils were identified and mapped.	Ray Burger
1/1/1996	Update or Other Action	Technical Memorandum, Results of 1995 IRP Field Program (dated January 1996). At ST46, BTEX compounds continue to be detected within the groundwater at well MW-22. Benzene, toluene, ethylbenzene, and xylenes were each detected in the 1995 sample. With the exception of toluene, each constituent was detected at concentrations slightly lower than observed during the 1994 investigation.	Ray Burger
3/15/1996	Site Characterization Report Approved	Final Remedial Investigation / Feasibility Study Report, Volume IV, Eareckson Air Station, Alaska (Formerly Shemya Air Force Base Alaska). At the ST46 source area, the only potential risk was determined to be from inorganics in groundwater that may be withdrawn from the base backup wells, GW-400 and GW-410. However, because groundwater is treated before consumption and, more importantly, is not actively used for drinking water, only limited risk exists.	Ray Burger
2/12/1997	Site Added to Database	Site added by Shannon and Wilson, Inc.	S&W-Miner
6/1/1997	Update or Other Action	Environmental Compliance Transition Plan (draft dated June 1997, received on July 1, 1994, no final prepared). Summary of transition tasks for ST46 include: 1) Continue current operation and maintenance. 2) Monthly inspections of aboveground piping, valves, and fuel pumping stations. 3) Yearly pressure or tracer testing of pipelines.	Gretchen Pikul
1/1/1998	Update or Other Action	Remediation Plan for SS07 Engineered Wetland and ST46 Well Decommissioning submitted by Jacobs Engineering. The ST46 water supply wells will be decommissioned to isolate the water in the wells from the drinking water distribution system. Decommissioning will entail disassembling the water supply piping and the electrical supply.	Gretchen Pikul
8/1/1998	Update or Other Action	Basewide Monitoring Program Work Plan submitted by Jacobs Engineering. Current Site Status: fuel tanks and piping removed in 1996. The most recent site investigation results for ST46 indicated that POL constituents were present in soil and groundwater at levels which could pose potential hazards and risks if contaminant exposure resulted. Water level measurements will be taken from each well and groundwater samples will be taken. All groundwater samples will be submitted for VOCs, SVOCs, and metal analysis.	Gretchen Pikul
9/1/1998	Update or Other Action	Remedial Action Work Plan Source Areas SS07 and ST46 submitted by Jacobs Engineering. Decommissioning of the ST46 water supply wells will entail disassembling the water supply piping and the electrical supply. The water supply piping will be disassembled at three locations: the well head, the chlorine supply line, and the water supply line. This will be conducted by unthreading the piping at the designated located and placing end caps on the open piping. The piping between the disassembly location will be removed. Decommissioning the electrical supply will entail de-energizing the electrical supply, removing electrical conduit from the supply panel to the well head, and cutting and capping the electrical power cord supplying the submersible pump.	Gretchen Pikul
10/30/1998	Meeting or Teleconference Held	Meeting with Air Force on response to comments for Decision Documents Volumes 3 and 4. Two main issues - (1) documents lacking detail necessary to describe remedial investigation, risk assessment, remedial, and no-further-action decisions, and (2) Air Force determination that no analyses will be performed for DRO, GRO, and RRO based on a 1994 Department approval of specific petroleum constituents for risk assessment studies. No resolution reached on these 2 main issues - outcome resulted in potential for dispute resolution process.	Gretchen Pikul
11/23/1998	Meeting or Teleconference Held	Meetings with Air Force on Decision Documents Volumes 3 and 4. Two main issues - (1) level of detail needed in documents, and (2) no DRO, GRO, and RRO analyses in long-term monitoring. No resolution reached on these 2 main issues - outcome resulted in potential for dispute resolution process.	Gretchen Pikul
12/1/1998	Update or Other Action	Final Management Action Plan submitted by Jacobs Engineering (updated December 1998). RI sampling included surface soil, subsurface soil, surface water, groundwater, and sediment. Risk assessment found no expected risk to human health or ecological receptors. Additional groundwater monitoring was conducted since the contamination lies near the base backup supply wells. Backup wells were also capped, dismantled, and isolated in 1998. Groundwater from ST46 is no longer introduced into the base water supply. NFRAP recommended but not yet approved.	Gretchen Pikul
12/30/1998	Meeting or Teleconference Held	Meeting with Air Force on Decision Documents Volumes 3 and 4. Two main issues - (1) level of detail needed in documents, and (2) no DRO, GRO, and RRO analyses in long-term monitoring. Avoided formal dispute resolution process - began working on document detail needed, and necessary analyses for long-term monitoring.	Gretchen Pikul
1/20/1999	Meeting or Teleconference Held	Meeting with Air Force to discuss appropriate sites to be included within the Decision Documents Volumes 3 and 4, and the appropriate site status (transfer to Compliance, RCRA, Remedial Actions, and No-Further-Remedial-Action-Planned). ST46 listed as a site to be transferred to Compliance.	Gretchen Pikul
4/29/1999	Update or Other Action	Remedial Action Report and Operation and Maintenance Manual SS07/ST46 Engineered Wetland submitted by USAF. The wetland system was installed to intercept and treat surface water flow containing a hydrocarbon sheen from Source Areas ST46 and SS07, by enhancing the natural biological degradation of hydrocarbon content through the use of plants and by providing a means of controlling surface water residence time. Other remedial actions performed include construction of drainage channels to direct ST46 surface drainage into the wetland, the removal of two small fuel impacted puddles and associated sediments in the ST46 drainage, the capping of petroleum impacted soils underneath the wetland area. Two nearby backup water supply wells were disabled during this remedial activity.	Gretchen Pikul
6/18/1999	Update or Other Action	Remedial Investigation Baseline Groundwater Monitoring Report, August - September 1998, Basewide Monitoring Activities and Findings - Final dated June 18, 1999. Two groundwater samples were collected at ST46 from wells MW-22 and ST46-MW01. At well ST46-MW01, antimony and cadmium were detected but appear to be background. The concentration of bis-(2-ethylhexyl)pthalate increased from 3.4 micrograms/Liter in 1995 to 20.8 micrograms/Liter in 1998. At well MW-22, BTEX concentrations all decreased from previous results. Benzene was the only constituent exceeding ADEC groundwater cleanup levels.	Gretchen Pikul
6/22/1999	Meeting or Teleconference Held	ADEC participated in a facility-wide site visit from June 22 - 25. The 24 site inspections and discussions were designed to aid in the development and review of upcoming Decision Documents.	Gretchen Pikul
11/30/1999	Site Ranked Using the AHRM	Initial ranking.	Gretchen Pikul
1/4/2000	Meeting or Teleconference Held	ADEC participated in a Decision Document meeting with Air Force and USFWS; ADEC reviewed, commented and participated in internal briefing meetings during January and February.	Gretchen Pikul
1/31/2000	Update or Other Action	Comprehensive Basewide Monitoring Report, June 1999 Basewide Monitoring Activities and Findings submitted by USAF. Based upon the 1999 sample results for both wells, along with a comparison to previous data, it appears POL constituent concentrations at these wells (and this site) are decreasing, indicating that the likely source is dissipating due to attenuation and migration. The following recommendations for ST46: Continue to monitor wells ST46-MW01 and MW-22 every 2 years for same analytical suite (plus GRO, DRO, and RRO).	Gretchen Pikul
8/16/2000	Update or Other Action	Basewide Monitoring Program Workplan dated August 16, 2000. Groundwater samples will be collected from two monitoring wells (ST-MW01 and MW-22) and analyzed for GRO, DRO, RRO, VOCS, SVOCs, and the full suite of TAL metals using analytical methods specified in the site-specific QAPP.	Gretchen Pikul
1/16/2001	Meeting or Teleconference Held	Decision Document and general status meeting with new Air Force project manager, Larry Opperman, and staff.	Gretchen Pikul
7/3/2001	Update or Other Action	Technical Memorandum - Risk Assessment Assumptions for Decision Documents (draft final dated January 8, 2001, ADEC comment letter dated March 19, 2001, comment resolution meeting on May 18, 2001, final received June 11, 2001, ADEC e-mail comments after reviewing final document dated July 3, 2001).	Gretchen Pikul
7/27/2001	Update or Other Action	Year 2000 Basewide Monitoring Program Report submitted by USAF. At ST46, groundwater samples were collected from monitoring wells ST46-MW-01 and MW-22. Samples were collected from these two locations to monitor groundwater conditions and evaluate possible trends in contaminant concentrations, both within the site and at a location immediately downgradient. Field duplicates were also collected. POL constituents in these wells appear to be decreasing. It is recommended to continue to monitor groundwater at these wells on a biannual basis.	Gretchen Pikul
9/30/2002	Update or Other Action	Management Action Plan submitted. ST46 included in the group of sites that require additional site investigation or data evaluation prior to ROD preparation.	Gretchen Pikul
12/11/2003	Update or Other Action	Air Force has reprioritized all remaining sites as medium and low priority due to security on island, no local community affected, and no current human health or ecological risk determined by risk assessment and investigations. Since the Air Force is required to complete all high priority projects by 2007, the Eareckson projects are being placed further in the outyears. See ADEC e-mail dated December 11, 2003 regarding sites ST46, SS23, SS25, ST50, and ST51 and requested monitoring during the interim years.	Gretchen Pikul
10/17/2007	Meeting or Teleconference Held	Discussed future of site at the TRIAD meeting regarding continuing groundwater monitoring to analyze plume stability.	Jonathan Schick
11/16/2007	Site Visit	ADEC staff travelled to Eareckson Air Station for 4 days to conduct site visits and become familiar with the ecology and topography of the island. Site visits were conducted to all pertinent sites and meetings were held to discuss the plan moving forward for Records of Decision and remedial alternatives.	Jonathan Schick
3/1/2008	Update or Other Action	Historical Data Review at Twelve Environmental Restoration Program Sites Technical Memorandum submitted by USAF. Surface soil sampling should be conducted to provide current data on contaminant concentrations. Relatively high levels of petroleum hydrocarbons were detected in 9 of the 10 tank basins sampled. Groundwater flowing beneath ST046 is believed to discharge into surface water at SS007 and possibly to marine waters west of ST046. Impacts to surface water are being addressed by remedies selected for SS007; therefore, no surface water or sediment sampling is proposed for ST046. Groundwater beneath SS007 is likely being impacted by contaminants migrating from ST046 and will be evaluated as part of this effort. Groundwater sampling is recommended to characterize current groundwater conditions at ST046 and SS007.	Jonathan Schick
7/1/2008	Site Characterization Workplan Approved	Remedial Field Investigation at Twelve Environmental Restoration Program Sites Work Plan submitted by USAF. Sample types and locations for ST046 consist of: 1) Nine surface soil samples and nine subsurface soil samples, one from each of the nine tank basins where elevated petroleum hydrocarbon concentrations were detected to characterize current conditions for updated risk assessments. 2) Eleven groundwater samples from wells to characterize current groundwater conditions at the sites and evaluate contaminant plume stability. 3) Three water samples, either surface water or groundwater collected from well points, collected from near the base of the bluff located northeast of the site.	Jonathan Schick
8/1/2009	Update or Other Action	Human Health and Ecological Risk Assessment Work Plan for 12 ERP Sites prepared by MWH. There is a groundwater divide at ST046, running diagonally across the site from northwest to southeast. Contamination leach to groundwater north of this divide may impact fresh surface water at the base of the bluff near North Beach Road. South of the divide, groundwater may flow south and impact surface water in the offsite oil/water separator ponds at SS007, or it may flow southeast to the marine environment at Shemya Pass. At this site, fresh surface water and fresh sediment exposure to aquatic and semi-aquatic birds is potentially complete but insignificant. Marine surface water and marine sediment pathways are assumed to be complete at ST046. Vapor intrusion pathway is incomplete. The soil pathway is potentially complete but insignificant.	Jonathan Schick
4/1/2010	Update or Other Action	Human Health and Ecological Risk Assessment Report for 12 ERP Sites submitted by MWH. Monitoring wells and surface water seeps at Sampling Sites ST046-SP01, ST046-SP02, and ST046-SP03 were sampled to evaluate impacts from contamination migrating northeast in groundwater from ST046. South of the divide, groundwater may flow south and impact surface water in the offsite oil/water separator ponds at SS007, or may flow southeast to the marine environment at Shemya Pass. Includes a cumulative ILCR and non-carcinogenic HI estimate for human receptors at ST046 and hazard estimates.	Jonathan Schick
6/1/2010	Update or Other Action	Remedial Field Investigation at twelve Environmental Restoration Program Sites Analytical Data Report submitted by MWH. DRO and POL constituents have all been detected in previous investigations and are the primary COPCs at ST046. Nine surface soil samples one from each of the nine tank basins, two subsurface soil samples, thirteen groundwater samples, and one surface water sample were taken. Analytical data provided.	Jonathan Schick
6/1/2010	Update or Other Action	Remedial Field Investigation at 12 Environmental Restoration Program Sites Remedial Investigation Report submitted by MWH. The 2008 RFI found that the soil in tank basins for former Tanks 111 and 122 at ST046 appear to have the most remaining petroleum hydrocarbon soil contamination. Based on the data collected during the 2008 RFI, groundwater contamination at ST046 appears to be attenuating. DRO, PAHs, and methylene chloride were detected above ADEC cleanup levels in surface soil. In groundwater, DRO and GRO were above cleanup levels. Surface water northeast of ST046 appears to be minimally impacted. To date, no evidence that hydrocarbons are migrating northward has been found.	Jonathan Schick
12/20/2011	CERCLA FS	Contaminted Sites Staff recieved the final version of the Feasibility Study Report for 12 sites at Eareckson Air Station. For groundwater at ST046, six alternatives were evaluated and Monitored Natural Attenuation with long-term monitoring, supported by ICs, is the combination of alternatives that most appropriately meets the evaluation criteria.	Jonathan Schick
3/1/2013	Update or Other Action	Proposed Plan for Remedial Action ERP Sites SS010, SS023/ST035, SS025, ST046, ST050, and ST051. The preferred alternative for surface and subsurface soil at ST046 is LTM with ICs. Development is not planned for the site, and risk to current receptors at ST046 is low. The low levels of risk and residual contamination do not justify the high cost and difficult mobilization required by the other soil treatment alternatives. An analysis of alternatives is provided. MNA with ICs is the combination of alternatives that best satisfies the evaluation criteria for groundwater at ST046.	Jessica Morris
3/17/2014	CERCLA ROD Approved	The ADEC Contaminated Site Program approved the February 2014 Record of Decision for SS010, SS023/ST035, SS025, ST046, ST050, and ST051. The selected remedy for ST046 was Long-term Management with Institutional Controls to restrict access to or inappropriate use of soil and groundwater. The remedy also includes Monitored Natural Attenuation (MNA) of contaminants in groundwater in sampling events conducted every 2 years. MNA at ST046 will also include MNA of the Engineered Wetland Site SS007.	Jessica Morris
8/27/2014	Long Term Monitoring Established	The ADEC Contaminated Sites Program approved the Final Work Plan for Environmental Long Term Monitoring and Site Inspections ((FT001, FT002, FT003, OT048, SS007, LF015, LF018, LF024, LF026, SS010, SS023, ST035, SS025, ST009, ST044, ST046, ST050, ST051) and Limited Site Characterization (Building 3055 Area) at Eareckson Air Station, Alaska. This scope of work is not sufficient to meet the long term monitoring objectives outlined in the most recently established RODs. The USAF will hold a scoping meeting with ADEC to plan additional well installation to meet these long term monitoring requirements. At ST046, Groundwater samples will be collected from monitoring wells MW22, MW28, MW37, MW25, MW19, and MW20.	Jessica Morris
5/20/2015	Institutional Control Compliance Review	The ADEC Contaminated Sites Program approved the Final Report for Environmental Long Term Monitoring and Site Inspections ((FT001, FT002, FT003, OT048, SS007, LF015, LF018, LF024, LF026, SS010, SS023, ST035, SS025, ST009, ST044, ST046, ST050, ST051) at Eareckson Air Station, Alaska. Concentrations of DRO in groundwater exceed the cleanup level at the site, and the ICs and LTM will continue as directed by the ROD for this site.	Jessica Morris
10/22/2015	Update or Other Action	The ADEC Contaminated Sites Program reviewed and commented on a draft scope of work for investigation, remedial process optimization, and long term management studies at several sites for Eareckson Air Station.	Jessica Morris
8/31/2016	Site Characterization Workplan Approved	The ADEC Contaminated Sites Program conditionally approved the 2016 Uniform Federal Policy - Quality Assurance Project Plan (UFP-QAPP) for Site Characterization at 14 Former POL Sites, Eareckson Air Station, Shemya Island, Alaska. The conditions for the UFP-QAPP are as follows: 1) We do not object to the long term monitoring work being completed as outlined in the UFP-QAPP; however ADEC cannot concur that efforts will be counted towards meeting the end point criteria outlined in the decision documents until an adequate monitoring program has been established. 2)The QAPP states that field screening results and field observations will be used to determine additional groundwater monitoring well locations. These locations should to be coordinated with ADEC. 3) The leaking underground storage tank (LUST) sites at Eareckson Air Station will need to be characterized and closed in accordance with LUST regulations that are included in 18 AAC 78. 4) The scope of work for this investigation may not be sufficient to fully characterize the sites listed in the work plan, and additional investigation may be necessary.	Jessica Morris
11/14/2016	Site Visit	ADEC staff travelled to Eareckson Air Station for 4 days to conduct site visits and become familiar with the ecology and topography of the island. Site visits were conducted to all pertinent sites and meetings were held to with ADEC and USAF to discuss a path forward for the sites.	Jessica Morris
3/31/2017	Document, Report, or Work plan Review - other	The ADEC Contaminated Sites Program approved the Final UFP-QAPP Site Investigation for Perfluorinated Compounds and Long Term Management Studies, Eareckson Air Station. The work plan was approved with the condition that the monitoring program proposed was not sufficient to meet the requirements in the RODs. ADEC requires a work plan for remedy implementation to establish an adequate monitoring program.	Jessica Morris
11/27/2017	Site Visit	ADEC staff travelled to Eareckson Air Station for 3 days to conduct site visits and institutional control inspections. Site visits were conducted to all pertinent sites and meetings were held to with ADEC and USAF to discuss a path forward for the sites.	Jessica Morris
5/2/2018	Document, Report, or Work plan Review - other	The ADEC Contaminated Sites Program submitted comments on the Draft Remedial Process Optimization Report for Eareckson Air Station. The purpose of the report was to present an evaluation of the effectiveness of the current selected site remedies and make recommendations for optimization of an island-wide monitoring and management program for contaminated sites at Eareckson. ADEC had numerous comments on the document, and requested a project team meeting to further discuss a more effective and efficient program at Eareckson.	Jessica Morris
1/8/2019	Institutional Control Compliance Review	The Alaska Department of Environmental Conservation (ADEC) Contaminated Sites Program received a copy of the Final Long Term Monitoring and Institutional Controls Inspection Report for Eareckson Air Station. The report is accepted as final documentation of the field activities. The report is approved with the conditions noted in the ADEC’s comments 1/8/19 letter. The field efforts completed are not considered sufficient to meet the overall long term monitoring requirements outlined in the site records of decision and regulations for closure end point criteria. ADEC is working with the USAF to develop a more efficient island-wide long term monitoring strategy for Eareckson Air Station.	Jessica Morris
7/5/2019	CERCLA ROD Periodic Review	DEC provided comments to the U.S. Air Force on the "Five-Year Review Report and Period Review for Eareckson Air Station, Shemya Island, Alaska, Draft” dated November 2018 on July 5, 2019.	Melinda Brunner
10/9/2019	Update or Other Action	Approved 2019 Remedial Action Operations, land Use/Institutional Control Supplemental Work Plan.	William Schmaltz
6/25/2020	Document, Report, or Work plan Review - other	The purpose of this project is to continue environmental long-term management at multiple sites at Eareckson AS, Alaska. The objectives of this project were to conduct groundwater sampling at eight sites, surface water sampling at four sites, sediment sampling at three sites, conduct IC inspections at 19 sites, and conduct an assessment of necessary repairs at LF026. The assessment of LF026 is documented in a separate technical memorandum; this LTM report presents the findings of the IC inspections and the results of groundwater, surface water, and sediment sampling.	Darren Mulkey
6/25/2020	Document, Report, or Work plan Review - other	"Draft Technical Project Report, 2019 Environmental Long Term Management Activities, Eaceckson Air Station, Sites FT001, FT002, FT003, OT048, SS007, SS010, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, LF015, LF018, LF024, and LF026, May 2020". The purpose of this project is to continue environmental long-term management at multiple sites at Eareckson AS, Alaska. The objectives of this project were to conduct groundwater sampling at eight sites, surface water sampling at four sites, sediment sampling at three sites, conduct IC inspections at 19 sites, and conduct an assessment of necessary repairs at LF026. The assessment of LF026 is documented in a separate technical memorandum; this LTM report presents the findings of the IC inspections and the results of groundwater, surface water, and sediment sampling.	Darren Mulkey
6/25/2020	Institutional Control Periodic Reporting	2019 Technical Project Report. The purpose of this project is to continue environmental long-term management at multiple sites at Eareckson AS, Alaska. The objectives of this project were to conduct groundwater sampling at eight sites, surface water sampling at four sites, sediment sampling at three sites, conduct IC inspections at 19 sites, and conduct an assessment of necessary repairs at LF026. The assessment of LF026 is documented in a separate technical memorandum; this LTM report presents the findings of the IC inspections and the results of groundwater, surface water, and sediment sampling.	Darren Mulkey
4/27/2022	Update or Other Action	On 4/27/2022 ADEC approved the Eareckson Air Station, Alaska, REMEDIAL PROCESS OPTIMIZATION REPORT dated April 2022. This Remedial Process Optimization (RPO) Report presents an evaluation of the effectiveness of current selected site remedies and makes recommendations for optimization of the IWM Program, as appropriate to establish a more integrated groundwater monitoring program at Eareckson AS. RPO is a systematic approach for evaluating and improving the effectiveness of site remediation without increasing site risk. This RPO Report presents a site-by-site evaluation of effectiveness of the sites selected remedy and provides recommendations to: • Streamline groundwater monitoring. • Develop a holistic approach to site management. • Maintain the remedial action objectives (RAOs) set forth in established Record of Decisions (RODs) and Decision Documents (DDs).	Daniela Fawcett
6/27/2023	Document, Report, or Work plan Review - other	DEC provided comments for the Draft Final 2021 Long Term Management, Land Use and Institutional Controls Report Eareckson Air Station, Shemya, Alaska Sites CS566, DA002/DA002A, DA003, FT001, FT002, FT003, LF015, LF018, LF024, LF026, ML001, MU001, OD001, OT048, OT617, PL560, PL575, SS005, SS007, SS010, SS012, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, TA555, TA556, TA616, TU553, TU554, TU558, TU559, TU567, TU568, XU912, ZZ001, dated June 2023.The report describes the institutional control inspections and sampling efforts conducted during November 15 through November 30th, 2021. Forty-two different sites were investigated at the Eareckson Air Station located on Shemya Island, Alaska. Groundwater was sampled at nine sites, surface water was sampled at five sites, and sediment sampling was conducted at two sites. Contaminants above cleanup levels remain present at most sites with stable or non-discernable trends. Most land use controls appear to be in good condition and Monitoring and continued inspections were recommended for all sites.	Ginna Quesada
7/3/2023	Document, Report, or Work plan Review - other	DEC submitted responses to comments for the Draft Final 2021 Long Term Management, Land Use and Institutional Controls Report Eareckson Air Station, Shemya, Alaska Sites CS566, DA002/DA002A, DA003, FT001, FT002, FT003, LF015, LF018, LF024, LF026, ML001, MU001, OD001, OT048, OT617, PL560, PL575, SS005, SS007, SS010, SS012, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, TA555, TA556, TA616, TU553, TU554, TU558, TU559, TU567, TU568, XU912, ZZ001, dated June 2023.	Ginna Quesada
8/3/2023	Long Term Monitoring Workplan or Report Review	DEC approved the "Final 2021 Long Term Management, Land Use and Institutional Controls Report Eareckson Air Station, Shemya, Alaska Sites CS566, DA002/DA002A, DA003, FT001, FT002, FT003, LF015, LF018, LF024, LF026, ML001, MU001, OD001, OT048, OT617, PL560, PL575, SS005, SS007, SS010, SS012, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, TA555, TA556, TA616, TU553, TU554, TU558, TU559, TU567, TU568, XU912, ZZ001, dated July 2023." The report recommends continuing with land-use control site inspections and monitoring the groundwater until all remedial objectives are met.	Erica Blake

Action Date

Action

Description

DEC Staff

11/1/1982

Update or Other Action

Recoverable, Reclaimable, and Waste Petroleum Product Management Plan 19-14. This plan includes the ST46 Tank Farm used to provide diesel fuel to the Power Plant. Spills from the tank farm flowed along a drainage ditch to the stream along North Road (SS007) and into a lagoon behind the beach at Alcan Bay.

Former Staff

9/1/1984

Preliminary Assessment Approved

Installation Restoration Program, Phase I Records Search, 5073rd Air Base Group, Shemya Air Force Base, Alaska (dated September 1984) prepared by JRB Associates. This report includes the Tank Farm ST46 site, which is also mentioned as PS-4, Diesel Tank No. 123. The tank farm was noted to have sustained corrosion and structural damage. The facility was in need of repair or replacement. It was recommended that tank repairs be made quickly. All the oil contaminated soils within the bermed tank farm and the drainage ditch (SS007) were to be excavated. Spill controls were to be installed at the facility, including an impermeable liner.

Former Staff

11/22/1985

Update or Other Action

CH2M Hill Trip Report dated 1985. Diesel oil tank farm is located on the northwest corner of the island. Three generations of storage tanks appear to have been constructed in this area. The earliest tanks are so rusted that only portions of their steel skeletons remain. Approximately 16 "second-generation" tanks were observed, scattered over the hillside in clusters of two. The newest tanks are designated numbers 104, 105, 109, 110, 111, 119, 120, 121, 122, and 123. Tank 123 was repaired and refurbished during FY 1985. Appear to have been many spills of diesel fuel in the tank farm area.

Former Staff

6/1/1986

Update or Other Action

Phase II - Task I Presurvey Report, Shemya Air Force Base and King Salmon Air Force Station. Two backup drinking water wells were located within the tank farm area, Well No. 29 at Building 410 and Well No. 4 located at Building 400. The wells draw water from the less accessible fractured bedrock aquifer. The wells were noted to be at risk from spills of PCB oils, fuels, and degreasing solvents from the Cobra Dane facility. Water sampled from both wells in both 1958 by the USACE and 1984 by the USAF showed PCB contamination (1 microgram/L) and trace petroleum product. A spill of 67,000 gallons of fuel oil was noted in 1984 from Tank 123.

Former Staff

9/25/1987

Update or Other Action

Shemya Field Trip Notes, September 15-19, 1987. Prepared by CH2M Hill. Tank 123 (ST08) located with ST046 was visited. There was no sign of spillage or leakage from the tank or fill/discharge lines. There was no oil sheen in the dike water or downstream of the sluice gate. The drums mentioned in the JRB report apparently had been moved. Fill material had been placed around the tank.

Former Staff

7/29/1988

Update or Other Action

Installation Restoration Program, Stage I Workplan, Shemya Air Force Base, Alaska. Prepared by CH2M Hill. The fuel tank farm consists of nine fuel storage tanks scattered over an area one-quarter mile in diameter. Most of the tanks sit in depressions formed during their construction; overburden soils were removed, and the tanks are founded on bedrock. The area contains several small leaks in tanks and piping and was the site of a 67,000 gallon spill from tank No. 123.

Former Staff

9/2/1988

Update or Other Action

Pollution Incident Report for Tank 123, ST008 at ST046. Approximately 50,000 gallons of diesel fuel was released from Tank 123 on August 31, 1988. The tank had ruptured, spilling fuel. The fuel was pumped to a dike and soil was removed around the tank.

Former Staff

10/1/1988

Update or Other Action

Evaluation of Lake at Shemya Air Force Base, Alaska. Technical memorandum prepared by Robert Binovi summarizing an evaluation of water samples collected from lakes at Shemya Island.

Former Staff

10/17/1988

Update or Other Action

Trip Report, Shemya Air Force Base, Alaska. Memorandum by Clare Jaeger (COE) summarizing the contamination discovered during soil and water sampling on October 6, 1988. The area of the diesel storage tanks centered around Tank 123. This tank has had two major spills of roughly 30,000 and 65,000 gallons in 1984 and 1988 respectively. The bulk of the fuel was recovered in both cases, but the floor of the dike is fuel saturated and fuel has wicked several feet up the dike. The fuel flowed from within the dike of Tank 123 by way of the drain into the drainage on the west side of the access road. For the remaining tanks, the dike floors of each are contaminated with fuel in varying degrees, and there is some degree of contamination in the dike walls. A monitoring well was installed in the area at the top of the hill where the natural drainage approaches the shoreline drive.

Former Staff

12/21/1988

Update or Other Action

POL Contamination Investigation, Diesel Tanks Phase I, Shemya Air Force Base, Alaska. Visual inspection of Tank 123 showed that the floor of the dike was fuel saturated. During the construction phase of Diesel Tanks Phase I, dewatering may become necessary and that water is likely to be contaminated with POLs. A map is included with the estimated POL contamination boundaries. Site of the new pumphouse has low levels of TRPHs and total xylenes.

Former Staff

1/20/1989

Update or Other Action

Well Numbers 4 and 29, Chemical Analyses and Pump Test, Shemya Air Force Base, Alaska. Memorandum by Thomas Delwyn (COE). Goal of this sampling program was to systematically collect water samples and record field data for a period of several weeks so that Well 4 and Well 29 could be evaluated as drinking water sources. Wells were checked daily and field measurements were made on seven occasions. A significant observation is that a noticeable sulfur odor developed in Well 29 after 2 days of pumping and the odor persisted throughout the 23 day test period. There were no organic compounds detected in excess of EPA/ADEC drinking water standards. Except for the hydrogen sulfide content, which can be treated to meet applicable requirements, these wells meets current drinking water requirements.

Former Staff

1/24/1989

Update or Other Action

POL Contamination Investigation, Diesel Tanks Phase II, Shemya Air Force Base, Alaska. Memorandum by Thomas Delwyn (COE) reporting on the Phase II petroleum, oil, and lubricant contamination investigation of diesel tanks. Contamination was found all around Tanks 104, 105, 110, 111, 119, 121, and 122. The contamination extends at least to a depth of 1.5 ft. The tanks appear to be built on top of hard rock, which provides at least a partial barrier. With only one bore hole per dike, it is impossible to define boundaries of POL contamination in the dike.

Former Staff

6/6/1989

Update or Other Action

FY-89 Diesel Storage Tanks (Schedule A), Add to and Alter Water System (Schedule B), Shemya AFB, POL Contamination. Memorandum by Dennis Hardy (COE) discussing the identification of additional POL contamination in soil and groundwater in the areas of diesel tanks 124 and 125, the POL pumphouse near tank 123, and the water gallery. In May 1989, six inches of floating POL product was found on top of the water table in two monitoring wells located between Tank 123 and the new POL Pumphouse. The COE does not know of any location in the vicinity of the new pumphouse which is not now contaminated by POL product.

Former Staff

7/6/1989

Update or Other Action

POL Contamination Investigations at Shemya Air Force Base, Alaska, 25 April through 3 June 1989. Memorandum by Thomas Delwyn (COE). Includes information on Diesel Tank Demo, Phase II and Diesel Tanks, Phase I. Two monitoring well were set up for Diesel Tanks Demo Phase II. One piezometer and one monitoring well near Tank 123 had floating fuel product.

Former Staff

11/8/1989

Update or Other Action

Diesel Tanks Demo, Phase II, Petroleum, Oil, Lubricant (POL) Contamination Investigation at Shemya Air Force Base, Alaska. Memorandum by Thomas Delwyn (COE) summarizing an investigation conducted in May 1989 in the ST46 tank farm area. Two monitoring wells were placed on the subject area. Existing monitor wells and piezometers near Tank 123 were measured for floating fuel product with an interface probe. Two piezometers did not show any fuel product. One piezometer and one monitor well had floating fuel product. Fuel sheens were observed on the standing water in the drainage between the oil separation ponds. Cleanup of discharged water during soil removal in the vicinity of Tank 123 will be necessary.

Former Staff

8/10/1990

Update or Other Action

Installation Restoration Program Stage 1 Final Technical Report submitted by CH2M Hill. Site PS-4 includes the perimeter area around Diesel Tank 123. The tanks sits in an unlined containment area constructed by excavating approximately 15 feet down. Depth to water is from 16 to 18 feet in this area. This is one of four sites recommended for the highest priority future investigations due to it potentially affecting the base water supply.

Former Staff

9/14/1990

Update or Other Action

Installation Restoration Program Stage 2 Final Work Plan submitted by CH2M Hill. No soil gas or geophysical investigations are planned for any of the four sites. 4 borings will be advanced at site PS-4, and up to two samples per boring will be submitted for analysis.

Former Staff

6/25/1991

Update or Other Action

Site Summaries for Shemya Air Force Base, Alaska Installation Restoration Program. Remedial design for PS-4 may include a subsurface drain system to collect and control leachate moving off site and/or a liner system within the containment area. With these controls, the amount of POL contamination reaching Pond 3 and the immediate vicinity of Tank 123 would be significantly reduced.

Dan Hartung

7/23/1991

Update or Other Action

Compliance Orders by Consent for Oil Discharge Prevention and Contingency Plan Submittals for King Salmon AFB and Shemya AFB bulk fuel facilities letter dated July 23, 1991 to 11th Air Force (Gene Gallogly, Chief of Environmental Planning Division) from ADEC (Svend Brandt-Erichsen, Regional Oil Program Coordinator).

Dan Hartung

7/26/1991

Update or Other Action

Notice of Violation / Request for Corrective Action letter to 5099th CEOS Air Force (Captain Kenneth Brown, Chief of Environmental Contract and Planning Section) from ADEC (Ron Klein, Manager of Regional Contaminated Sites) regarding numerous sites and the status of site assessments and remedial actions. PS-4 site listed as one of the sites that are currently causing pollution releases to the lands and waters of the state.

Dan Hartung

8/29/1991

Update or Other Action

(Old R:Base Action Code = REM - Removal / Excavation). Quest Environmental submits a QA/QC Project plan for the Schedule "A" POL system upgrade and Schedule "B" tank demolition document DACA 85-91-B-0011. No site map was included with submittal. Description of site was stated to be located within the Norhtwest portion of Shemya A.F.B. and contained within an area identified as being contaminated with petroleum product constituents from previous usage.

Former Staff

10/4/1991

Update or Other Action

Installation Restoration Program (IRP) Field Investigation Plan, Shemya Air Force Base, Alaska (2 volumes). The diked area of PS-4 is currently undergoing site remediation to remove contaminated soil and install a permanent dike/liner/drainage system. The investigation for PS-4 will be limited to an evaluation of groundwater based on three groundwater monitoring wells to be field-located.

Dan Hartung

5/20/1993

Update or Other Action

Status of Shemya Air Force Base in Relation to Proposal for the National Priorities List.

Ray Burger

12/1/1993

Update or Other Action

Eareckson Air Force Station (formerly Shemya AFB, Alaska) 1993 Installation Restoration Program Basewide and Limited Source Investigation Workplan. Prepared by Jacobs Engineering Group. Groundwater in the vicinity of ST46 will be evaluated as part of the 1993 basewide field investigation. Well points may provide some source-specific data. Further investigation may be required in 1994.

Ray Burger

12/15/1993

Update or Other Action

Oil and Hazardous Discharge Prevention and Contingency Plan, Shemya AFB, Alaska. Final Draft. Prepared by 11th Tactical Control Wing.

Ray Burger

8/1/1994

Update or Other Action

Community Relations Plan submitted by Jacobs Engineering. ST46 is considered to be a POL source area. The abandoned tank farm consisted of numerous large-capacity tanks previously used to provide diesel fuel to the power plant. Runoff from ST46 flows into the West End Oil/Water Separator Pond 3. Analytical results from the soil sampling indicate extensive POL contamination associated with the tank farm area.

Ray Burger

12/15/1994

Update or Other Action

Final Remedial Investigation, Workplan Addendum, 1994 Field Season, Eareckson Air Station, Alaska (formerly Shemya AFB, Alaska). Prepared by Jacobs Engineering Group. The nine aboveground storage tanks that comprise the ST46 tank farm are being removed during the 1994 field season. Although an LSI was not conducted at ST46 in 1993, groundwater at the source area was evaluated as part of the basewide program. Groundwater information at ST46 in 1993 indicated that contamination was present, but contaminant concentrations are below risk-based standards and/or pathways are incomplete. Objectives of the 1994 investigation are to characterize any soil contamination left in place following the removal actions, further evaluate the extent of groundwater contamination, and establish hydraulic control.

Ray Burger

1/15/1995

Update or Other Action

Addendum, Pipelines 1 and 2 Workplan, Eareckson AS.

Ray Burger

2/1/1995

Update or Other Action

Community Relations Photo Notebook; Remedial Investigations, Feasibility Studies and Remedial Actions. Last summer, the Air Force dismantled ten 500,000 gallon diesel fuel tanks at Source Area ST46. The inactive tanks, reportedly installed in the early 1950s, were once used to store diesel fuel for the Shemya power plan. Before dismantling, tank contents including sludges and scale, were removed and tank interiors were cleaned of all fuel residue. Tank sections have been stockpiled at Eareckson, awaiting transport off island by barge. Piping associated with the tank systems was also disconnected.

Ray Burger

2/15/1995

Interim Removal Action Approved

Eareckson AS, IRP Site ST46 - Abandoned Tank Farm (NW), Remove Abandoned Pipelines - Pipeline 1 and 2, Final Workplan, prepared by 611th CES/CEOR. An Air Force project is planned to remove two sets of abandoned pipeline from the northwest tank farm area, Eareckson AS. Pipeline 1 connected eight 480,000 gallon AST tanks that were removed in a FY94 project. Pipeline 2 is an aviation gas and/or diesel pipeline which connected eleven 480,000-, twelve 20,000-, and twenty-four 40,000 gallon tanks. The pipeline will be removed and decontaminated, and either shredded, crushed, or cut into sections for barge transport and retrograde at Seattle, Washington.

Ray Burger

3/15/1995

Interim Removal Action Approved

Eareckson AS, Aboveground Storage Tank (AST) Removal, Summary Report, Phase I (draft report only). Prepared by 611th CES/CEOR.

Ray Burger

4/15/1995

Update or Other Action

Revised 1994 Well Abandonment Summary Report. Prepared by Jacobs Engineering Group.

Ray Burger

8/1/1995

Update or Other Action

Technical Memorandum 1995 Field Activities submitted by Jacobs Engineering. Additional work at ST46 is limited to the collection of one groundwater sample from monitoring well MW-22 to continue the monitoring effort to evaluate increasing or decreasing concentrations of hazardous constituents. The sample will be analyzed for VOCs.

Ray Burger

8/1/1995

Update or Other Action

Remedial Investigation/Feasibility Study Report Volume I submitted by Jacobs Engineering. During air rotary activities at ST46, two deep monitoring wells were installed. In the ST46 Area of Management Zone 7, benzene in groundwater exceeded the MCL at two well locations adjacent to the base alternate water supply wells GW-400 and GW-410.

Ray Burger

9/1/1995

Update or Other Action

Field and Analytical Report for the Removal of Abandoned Pipelines 1 and 2, IRP Site ST46 - Abandoned Tank Farm (NW) were submitted by the USAF. The 611 CES/CEOR removed approximately 20,000 feet of abandoned petroleum pipelines at the Eareckson AS from March to July 1995. Upon removal, the Pipeline 1 was decontaminated and shipped to Defense Reutilization Marketing Office (DRMO). The Pipeline 2, the older pipeline, did not have any recycling value and was disposed of in the local landfill. During the pipeline removal soils in the immediate vicinity were examined for petroleum contamination, and soil samples were collected at places with possible contamination. Contaminated soils were identified and mapped.

Ray Burger

1/1/1996

Update or Other Action

Technical Memorandum, Results of 1995 IRP Field Program (dated January 1996). At ST46, BTEX compounds continue to be detected within the groundwater at well MW-22. Benzene, toluene, ethylbenzene, and xylenes were each detected in the 1995 sample. With the exception of toluene, each constituent was detected at concentrations slightly lower than observed during the 1994 investigation.

Ray Burger

3/15/1996

Site Characterization Report Approved

Final Remedial Investigation / Feasibility Study Report, Volume IV, Eareckson Air Station, Alaska (Formerly Shemya Air Force Base Alaska). At the ST46 source area, the only potential risk was determined to be from inorganics in groundwater that may be withdrawn from the base backup wells, GW-400 and GW-410. However, because groundwater is treated before consumption and, more importantly, is not actively used for drinking water, only limited risk exists.

Ray Burger

2/12/1997

Site Added to Database

Site added by Shannon and Wilson, Inc.

S&W-Miner

6/1/1997

Update or Other Action

Environmental Compliance Transition Plan (draft dated June 1997, received on July 1, 1994, no final prepared). Summary of transition tasks for ST46 include: 1) Continue current operation and maintenance. 2) Monthly inspections of aboveground piping, valves, and fuel pumping stations. 3) Yearly pressure or tracer testing of pipelines.

Gretchen Pikul

1/1/1998

Update or Other Action

Remediation Plan for SS07 Engineered Wetland and ST46 Well Decommissioning submitted by Jacobs Engineering. The ST46 water supply wells will be decommissioned to isolate the water in the wells from the drinking water distribution system. Decommissioning will entail disassembling the water supply piping and the electrical supply.

Gretchen Pikul

8/1/1998

Update or Other Action

Basewide Monitoring Program Work Plan submitted by Jacobs Engineering. Current Site Status: fuel tanks and piping removed in 1996. The most recent site investigation results for ST46 indicated that POL constituents were present in soil and groundwater at levels which could pose potential hazards and risks if contaminant exposure resulted. Water level measurements will be taken from each well and groundwater samples will be taken. All groundwater samples will be submitted for VOCs, SVOCs, and metal analysis.

Gretchen Pikul

9/1/1998

Update or Other Action

Remedial Action Work Plan Source Areas SS07 and ST46 submitted by Jacobs Engineering. Decommissioning of the ST46 water supply wells will entail disassembling the water supply piping and the electrical supply. The water supply piping will be disassembled at three locations: the well head, the chlorine supply line, and the water supply line. This will be conducted by unthreading the piping at the designated located and placing end caps on the open piping. The piping between the disassembly location will be removed. Decommissioning the electrical supply will entail de-energizing the electrical supply, removing electrical conduit from the supply panel to the well head, and cutting and capping the electrical power cord supplying the submersible pump.

Gretchen Pikul

10/30/1998

Meeting or Teleconference Held

Meeting with Air Force on response to comments for Decision Documents Volumes 3 and 4. Two main issues - (1) documents lacking detail necessary to describe remedial investigation, risk assessment, remedial, and no-further-action decisions, and (2) Air Force determination that no analyses will be performed for DRO, GRO, and RRO based on a 1994 Department approval of specific petroleum constituents for risk assessment studies. No resolution reached on these 2 main issues - outcome resulted in potential for dispute resolution process.

Gretchen Pikul

11/23/1998

Meeting or Teleconference Held

Meetings with Air Force on Decision Documents Volumes 3 and 4. Two main issues - (1) level of detail needed in documents, and (2) no DRO, GRO, and RRO analyses in long-term monitoring. No resolution reached on these 2 main issues - outcome resulted in potential for dispute resolution process.

Gretchen Pikul

12/1/1998

Update or Other Action

Final Management Action Plan submitted by Jacobs Engineering (updated December 1998). RI sampling included surface soil, subsurface soil, surface water, groundwater, and sediment. Risk assessment found no expected risk to human health or ecological receptors. Additional groundwater monitoring was conducted since the contamination lies near the base backup supply wells. Backup wells were also capped, dismantled, and isolated in 1998. Groundwater from ST46 is no longer introduced into the base water supply. NFRAP recommended but not yet approved.

Gretchen Pikul

12/30/1998

Meeting or Teleconference Held

Meeting with Air Force on Decision Documents Volumes 3 and 4. Two main issues - (1) level of detail needed in documents, and (2) no DRO, GRO, and RRO analyses in long-term monitoring. Avoided formal dispute resolution process - began working on document detail needed, and necessary analyses for long-term monitoring.

Gretchen Pikul

1/20/1999

Meeting or Teleconference Held

Meeting with Air Force to discuss appropriate sites to be included within the Decision Documents Volumes 3 and 4, and the appropriate site status (transfer to Compliance, RCRA, Remedial Actions, and No-Further-Remedial-Action-Planned). ST46 listed as a site to be transferred to Compliance.

Gretchen Pikul

4/29/1999

Update or Other Action

Remedial Action Report and Operation and Maintenance Manual SS07/ST46 Engineered Wetland submitted by USAF. The wetland system was installed to intercept and treat surface water flow containing a hydrocarbon sheen from Source Areas ST46 and SS07, by enhancing the natural biological degradation of hydrocarbon content through the use of plants and by providing a means of controlling surface water residence time. Other remedial actions performed include construction of drainage channels to direct ST46 surface drainage into the wetland, the removal of two small fuel impacted puddles and associated sediments in the ST46 drainage, the capping of petroleum impacted soils underneath the wetland area. Two nearby backup water supply wells were disabled during this remedial activity.

Gretchen Pikul

6/18/1999

Update or Other Action

Remedial Investigation Baseline Groundwater Monitoring Report, August - September 1998, Basewide Monitoring Activities and Findings - Final dated June 18, 1999. Two groundwater samples were collected at ST46 from wells MW-22 and ST46-MW01. At well ST46-MW01, antimony and cadmium were detected but appear to be background. The concentration of bis-(2-ethylhexyl)pthalate increased from 3.4 micrograms/Liter in 1995 to 20.8 micrograms/Liter in 1998. At well MW-22, BTEX concentrations all decreased from previous results. Benzene was the only constituent exceeding ADEC groundwater cleanup levels.

Gretchen Pikul

6/22/1999

Meeting or Teleconference Held

ADEC participated in a facility-wide site visit from June 22 - 25. The 24 site inspections and discussions were designed to aid in the development and review of upcoming Decision Documents.

Gretchen Pikul

11/30/1999

Site Ranked Using the AHRM

Initial ranking.

Gretchen Pikul

1/4/2000

Meeting or Teleconference Held

ADEC participated in a Decision Document meeting with Air Force and USFWS; ADEC reviewed, commented and participated in internal briefing meetings during January and February.

Gretchen Pikul

1/31/2000

Update or Other Action

Comprehensive Basewide Monitoring Report, June 1999 Basewide Monitoring Activities and Findings submitted by USAF. Based upon the 1999 sample results for both wells, along with a comparison to previous data, it appears POL constituent concentrations at these wells (and this site) are decreasing, indicating that the likely source is dissipating due to attenuation and migration. The following recommendations for ST46: Continue to monitor wells ST46-MW01 and MW-22 every 2 years for same analytical suite (plus GRO, DRO, and RRO).

Gretchen Pikul

8/16/2000

Update or Other Action

Basewide Monitoring Program Workplan dated August 16, 2000. Groundwater samples will be collected from two monitoring wells (ST-MW01 and MW-22) and analyzed for GRO, DRO, RRO, VOCS, SVOCs, and the full suite of TAL metals using analytical methods specified in the site-specific QAPP.

Gretchen Pikul

1/16/2001

Meeting or Teleconference Held

Decision Document and general status meeting with new Air Force project manager, Larry Opperman, and staff.

Gretchen Pikul

7/3/2001

Update or Other Action

Technical Memorandum - Risk Assessment Assumptions for Decision Documents (draft final dated January 8, 2001, ADEC comment letter dated March 19, 2001, comment resolution meeting on May 18, 2001, final received June 11, 2001, ADEC e-mail comments after reviewing final document dated July 3, 2001).

Gretchen Pikul

7/27/2001

Update or Other Action

Year 2000 Basewide Monitoring Program Report submitted by USAF. At ST46, groundwater samples were collected from monitoring wells ST46-MW-01 and MW-22. Samples were collected from these two locations to monitor groundwater conditions and evaluate possible trends in contaminant concentrations, both within the site and at a location immediately downgradient. Field duplicates were also collected. POL constituents in these wells appear to be decreasing. It is recommended to continue to monitor groundwater at these wells on a biannual basis.

Gretchen Pikul

9/30/2002

Update or Other Action

Management Action Plan submitted. ST46 included in the group of sites that require additional site investigation or data evaluation prior to ROD preparation.

Gretchen Pikul

12/11/2003

Update or Other Action

Air Force has reprioritized all remaining sites as medium and low priority due to security on island, no local community affected, and no current human health or ecological risk determined by risk assessment and investigations. Since the Air Force is required to complete all high priority projects by 2007, the Eareckson projects are being placed further in the outyears. See ADEC e-mail dated December 11, 2003 regarding sites ST46, SS23, SS25, ST50, and ST51 and requested monitoring during the interim years.

Gretchen Pikul

10/17/2007

Meeting or Teleconference Held

Discussed future of site at the TRIAD meeting regarding continuing groundwater monitoring to analyze plume stability.

Jonathan Schick

11/16/2007

Site Visit

ADEC staff travelled to Eareckson Air Station for 4 days to conduct site visits and become familiar with the ecology and topography of the island. Site visits were conducted to all pertinent sites and meetings were held to discuss the plan moving forward for Records of Decision and remedial alternatives.

Jonathan Schick

3/1/2008

Update or Other Action

Historical Data Review at Twelve Environmental Restoration Program Sites Technical Memorandum submitted by USAF. Surface soil sampling should be conducted to provide current data on contaminant concentrations. Relatively high levels of petroleum hydrocarbons were detected in 9 of the 10 tank basins sampled. Groundwater flowing beneath ST046 is believed to discharge into surface water at SS007 and possibly to marine waters west of ST046. Impacts to surface water are being addressed by remedies selected for SS007; therefore, no surface water or sediment sampling is proposed for ST046. Groundwater beneath SS007 is likely being impacted by contaminants migrating from ST046 and will be evaluated as part of this effort. Groundwater sampling is recommended to characterize current groundwater conditions at ST046 and SS007.

Jonathan Schick

7/1/2008

Site Characterization Workplan Approved

Remedial Field Investigation at Twelve Environmental Restoration Program Sites Work Plan submitted by USAF. Sample types and locations for ST046 consist of: 1) Nine surface soil samples and nine subsurface soil samples, one from each of the nine tank basins where elevated petroleum hydrocarbon concentrations were detected to characterize current conditions for updated risk assessments. 2) Eleven groundwater samples from wells to characterize current groundwater conditions at the sites and evaluate contaminant plume stability. 3) Three water samples, either surface water or groundwater collected from well points, collected from near the base of the bluff located northeast of the site.

Jonathan Schick

8/1/2009

Update or Other Action

Human Health and Ecological Risk Assessment Work Plan for 12 ERP Sites prepared by MWH. There is a groundwater divide at ST046, running diagonally across the site from northwest to southeast. Contamination leach to groundwater north of this divide may impact fresh surface water at the base of the bluff near North Beach Road. South of the divide, groundwater may flow south and impact surface water in the offsite oil/water separator ponds at SS007, or it may flow southeast to the marine environment at Shemya Pass. At this site, fresh surface water and fresh sediment exposure to aquatic and semi-aquatic birds is potentially complete but insignificant. Marine surface water and marine sediment pathways are assumed to be complete at ST046. Vapor intrusion pathway is incomplete. The soil pathway is potentially complete but insignificant.

Jonathan Schick

4/1/2010

Update or Other Action

Human Health and Ecological Risk Assessment Report for 12 ERP Sites submitted by MWH. Monitoring wells and surface water seeps at Sampling Sites ST046-SP01, ST046-SP02, and ST046-SP03 were sampled to evaluate impacts from contamination migrating northeast in groundwater from ST046. South of the divide, groundwater may flow south and impact surface water in the offsite oil/water separator ponds at SS007, or may flow southeast to the marine environment at Shemya Pass. Includes a cumulative ILCR and non-carcinogenic HI estimate for human receptors at ST046 and hazard estimates.

Jonathan Schick

6/1/2010

Update or Other Action

Remedial Field Investigation at twelve Environmental Restoration Program Sites Analytical Data Report submitted by MWH. DRO and POL constituents have all been detected in previous investigations and are the primary COPCs at ST046. Nine surface soil samples one from each of the nine tank basins, two subsurface soil samples, thirteen groundwater samples, and one surface water sample were taken. Analytical data provided.

Jonathan Schick

6/1/2010

Update or Other Action

Remedial Field Investigation at 12 Environmental Restoration Program Sites Remedial Investigation Report submitted by MWH. The 2008 RFI found that the soil in tank basins for former Tanks 111 and 122 at ST046 appear to have the most remaining petroleum hydrocarbon soil contamination. Based on the data collected during the 2008 RFI, groundwater contamination at ST046 appears to be attenuating. DRO, PAHs, and methylene chloride were detected above ADEC cleanup levels in surface soil. In groundwater, DRO and GRO were above cleanup levels. Surface water northeast of ST046 appears to be minimally impacted. To date, no evidence that hydrocarbons are migrating northward has been found.

Jonathan Schick

12/20/2011

CERCLA FS

Contaminted Sites Staff recieved the final version of the Feasibility Study Report for 12 sites at Eareckson Air Station. For groundwater at ST046, six alternatives were evaluated and Monitored Natural Attenuation with long-term monitoring, supported by ICs, is the combination of alternatives that most appropriately meets the evaluation criteria.

Jonathan Schick

3/1/2013

Update or Other Action

Proposed Plan for Remedial Action ERP Sites SS010, SS023/ST035, SS025, ST046, ST050, and ST051. The preferred alternative for surface and subsurface soil at ST046 is LTM with ICs. Development is not planned for the site, and risk to current receptors at ST046 is low. The low levels of risk and residual contamination do not justify the high cost and difficult mobilization required by the other soil treatment alternatives. An analysis of alternatives is provided. MNA with ICs is the combination of alternatives that best satisfies the evaluation criteria for groundwater at ST046.

Jessica Morris

3/17/2014

CERCLA ROD Approved

The ADEC Contaminated Site Program approved the February 2014 Record of Decision for SS010, SS023/ST035, SS025, ST046, ST050, and ST051. The selected remedy for ST046 was Long-term Management with Institutional Controls to restrict access to or inappropriate use of soil and groundwater. The remedy also includes Monitored Natural Attenuation (MNA) of contaminants in groundwater in sampling events conducted every 2 years. MNA at ST046 will also include MNA of the Engineered Wetland Site SS007.

Jessica Morris

8/27/2014

Long Term Monitoring Established

The ADEC Contaminated Sites Program approved the Final Work Plan for Environmental Long Term Monitoring and Site Inspections ((FT001, FT002, FT003, OT048, SS007, LF015, LF018, LF024, LF026, SS010, SS023, ST035, SS025, ST009, ST044, ST046, ST050, ST051) and Limited Site Characterization (Building 3055 Area) at Eareckson Air Station, Alaska. This scope of work is not sufficient to meet the long term monitoring objectives outlined in the most recently established RODs. The USAF will hold a scoping meeting with ADEC to plan additional well installation to meet these long term monitoring requirements. At ST046, Groundwater samples will be collected from monitoring wells MW22, MW28, MW37, MW25, MW19, and MW20.

Jessica Morris

5/20/2015

Institutional Control Compliance Review

The ADEC Contaminated Sites Program approved the Final Report for Environmental Long Term Monitoring and Site Inspections ((FT001, FT002, FT003, OT048, SS007, LF015, LF018, LF024, LF026, SS010, SS023, ST035, SS025, ST009, ST044, ST046, ST050, ST051) at Eareckson Air Station, Alaska. Concentrations of DRO in groundwater exceed the cleanup level at the site, and the ICs and LTM will continue as directed by the ROD for this site.

Jessica Morris

10/22/2015

Update or Other Action

The ADEC Contaminated Sites Program reviewed and commented on a draft scope of work for investigation, remedial process optimization, and long term management studies at several sites for Eareckson Air Station.

Jessica Morris

8/31/2016

Site Characterization Workplan Approved

The ADEC Contaminated Sites Program conditionally approved the 2016 Uniform Federal Policy - Quality Assurance Project Plan (UFP-QAPP) for Site Characterization at 14 Former POL Sites, Eareckson Air Station, Shemya Island, Alaska. The conditions for the UFP-QAPP are as follows: 1) We do not object to the long term monitoring work being completed as outlined in the UFP-QAPP; however ADEC cannot concur that efforts will be counted towards meeting the end point criteria outlined in the decision documents until an adequate monitoring program has been established. 2)The QAPP states that field screening results and field observations will be used to determine additional groundwater monitoring well locations. These locations should to be coordinated with ADEC. 3) The leaking underground storage tank (LUST) sites at Eareckson Air Station will need to be characterized and closed in accordance with LUST regulations that are included in 18 AAC 78. 4) The scope of work for this investigation may not be sufficient to fully characterize the sites listed in the work plan, and additional investigation may be necessary.

Jessica Morris

11/14/2016

Site Visit

ADEC staff travelled to Eareckson Air Station for 4 days to conduct site visits and become familiar with the ecology and topography of the island. Site visits were conducted to all pertinent sites and meetings were held to with ADEC and USAF to discuss a path forward for the sites.

Jessica Morris

3/31/2017

Document, Report, or Work plan Review - other

The ADEC Contaminated Sites Program approved the Final UFP-QAPP Site Investigation for Perfluorinated Compounds and Long Term Management Studies, Eareckson Air Station. The work plan was approved with the condition that the monitoring program proposed was not sufficient to meet the requirements in the RODs. ADEC requires a work plan for remedy implementation to establish an adequate monitoring program.

Jessica Morris

11/27/2017

Site Visit

ADEC staff travelled to Eareckson Air Station for 3 days to conduct site visits and institutional control inspections. Site visits were conducted to all pertinent sites and meetings were held to with ADEC and USAF to discuss a path forward for the sites.

Jessica Morris

5/2/2018

Document, Report, or Work plan Review - other

The ADEC Contaminated Sites Program submitted comments on the Draft Remedial Process Optimization Report for Eareckson Air Station. The purpose of the report was to present an evaluation of the effectiveness of the current selected site remedies and make recommendations for optimization of an island-wide monitoring and management program for contaminated sites at Eareckson. ADEC had numerous comments on the document, and requested a project team meeting to further discuss a more effective and efficient program at Eareckson.

Jessica Morris

1/8/2019

Institutional Control Compliance Review

The Alaska Department of Environmental Conservation (ADEC) Contaminated Sites Program received a copy of the Final Long Term Monitoring and Institutional Controls Inspection Report for Eareckson Air Station. The report is accepted as final documentation of the field activities. The report is approved with the conditions noted in the ADEC’s comments 1/8/19 letter. The field efforts completed are not considered sufficient to meet the overall long term monitoring requirements outlined in the site records of decision and regulations for closure end point criteria. ADEC is working with the USAF to develop a more efficient island-wide long term monitoring strategy for Eareckson Air Station.

Jessica Morris

7/5/2019

CERCLA ROD Periodic Review

DEC provided comments to the U.S. Air Force on the "Five-Year Review Report and Period Review for Eareckson Air Station, Shemya Island, Alaska, Draft” dated November 2018 on July 5, 2019.

Melinda Brunner

10/9/2019

Update or Other Action

Approved 2019 Remedial Action Operations, land Use/Institutional Control Supplemental Work Plan.

William Schmaltz

6/25/2020

Document, Report, or Work plan Review - other

The purpose of this project is to continue environmental long-term management at multiple sites at Eareckson AS, Alaska. The objectives of this project were to conduct groundwater sampling at eight sites, surface water sampling at four sites, sediment sampling at three sites, conduct IC inspections at 19 sites, and conduct an assessment of necessary repairs at LF026. The assessment of LF026 is documented in a separate technical memorandum; this LTM report presents the findings of the IC inspections and the results of groundwater, surface water, and sediment sampling.

Darren Mulkey

6/25/2020

Document, Report, or Work plan Review - other

"Draft Technical Project Report, 2019 Environmental Long Term Management Activities, Eaceckson Air Station, Sites FT001, FT002, FT003, OT048, SS007, SS010, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, LF015, LF018, LF024, and LF026, May 2020". The purpose of this project is to continue environmental long-term management at multiple sites at Eareckson AS, Alaska. The objectives of this project were to conduct groundwater sampling at eight sites, surface water sampling at four sites, sediment sampling at three sites, conduct IC inspections at 19 sites, and conduct an assessment of necessary repairs at LF026. The assessment of LF026 is documented in a separate technical memorandum; this LTM report presents the findings of the IC inspections and the results of groundwater, surface water, and sediment sampling.

Darren Mulkey

6/25/2020

Institutional Control Periodic Reporting

2019 Technical Project Report. The purpose of this project is to continue environmental long-term management at multiple sites at Eareckson AS, Alaska. The objectives of this project were to conduct groundwater sampling at eight sites, surface water sampling at four sites, sediment sampling at three sites, conduct IC inspections at 19 sites, and conduct an assessment of necessary repairs at LF026. The assessment of LF026 is documented in a separate technical memorandum; this LTM report presents the findings of the IC inspections and the results of groundwater, surface water, and sediment sampling.

Darren Mulkey

4/27/2022

Update or Other Action

On 4/27/2022 ADEC approved the Eareckson Air Station, Alaska, REMEDIAL PROCESS OPTIMIZATION REPORT dated April 2022. This Remedial Process Optimization (RPO) Report presents an evaluation of the effectiveness of current selected site remedies and makes recommendations for optimization of the IWM Program, as appropriate to establish a more integrated groundwater monitoring program at Eareckson AS. RPO is a systematic approach for evaluating and improving the effectiveness of site remediation without increasing site risk. This RPO Report presents a site-by-site evaluation of effectiveness of the sites selected remedy and provides recommendations to: • Streamline groundwater monitoring. • Develop a holistic approach to site management. • Maintain the remedial action objectives (RAOs) set forth in established Record of Decisions (RODs) and Decision Documents (DDs).

Daniela Fawcett

6/27/2023

Document, Report, or Work plan Review - other

DEC provided comments for the Draft Final 2021 Long Term Management, Land Use and Institutional Controls Report Eareckson Air Station, Shemya, Alaska Sites CS566, DA002/DA002A, DA003, FT001, FT002, FT003, LF015, LF018, LF024, LF026, ML001, MU001, OD001, OT048, OT617, PL560, PL575, SS005, SS007, SS010, SS012, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, TA555, TA556, TA616, TU553, TU554, TU558, TU559, TU567, TU568, XU912, ZZ001, dated June 2023.The report describes the institutional control inspections and sampling efforts conducted during November 15 through November 30th, 2021. Forty-two different sites were investigated at the Eareckson Air Station located on Shemya Island, Alaska. Groundwater was sampled at nine sites, surface water was sampled at five sites, and sediment sampling was conducted at two sites. Contaminants above cleanup levels remain present at most sites with stable or non-discernable trends. Most land use controls appear to be in good condition and Monitoring and continued inspections were recommended for all sites.

Ginna Quesada

7/3/2023

Document, Report, or Work plan Review - other

DEC submitted responses to comments for the Draft Final 2021 Long Term Management, Land Use and Institutional Controls Report Eareckson Air Station, Shemya, Alaska Sites CS566, DA002/DA002A, DA003, FT001, FT002, FT003, LF015, LF018, LF024, LF026, ML001, MU001, OD001, OT048, OT617, PL560, PL575, SS005, SS007, SS010, SS012, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, TA555, TA556, TA616, TU553, TU554, TU558, TU559, TU567, TU568, XU912, ZZ001, dated June 2023.

Ginna Quesada

8/3/2023

Long Term Monitoring Workplan or Report Review

DEC approved the "Final 2021 Long Term Management, Land Use and Institutional Controls Report Eareckson Air Station, Shemya, Alaska Sites CS566, DA002/DA002A, DA003, FT001, FT002, FT003, LF015, LF018, LF024, LF026, ML001, MU001, OD001, OT048, OT617, PL560, PL575, SS005, SS007, SS010, SS012, SS023, SS025, ST009, ST035, ST039, ST044, ST046, ST050, ST051, TA555, TA556, TA616, TU553, TU554, TU558, TU559, TU567, TU568, XU912, ZZ001, dated July 2023." The report recommends continuing with land-use control site inspections and monitoring the groundwater until all remedial objectives are met.

Erica Blake

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2021 Remedial Investigation Report

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Site Report: Eareckson Air Station ST46

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2021 Remedial Investigation Report

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State of Alaska Department of Environmental Conservation