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Site Report: Eareckson Air Station SS07


Site Name: Eareckson Air Station SS07
Address: West End O/W Sep Ponds1-5, Amchitka, AK 99546
File Number: 2649.38.001, 2649.38.007
Hazard ID: 2845
Status: Active
Staff: Jessica Morris, 9072693077 Jessica.Morris@alaska.gov
Latitude: 52.731231
Longitude: 174.082136
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.

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. SS007 is located on the northwest end of Shemya Island adjacent to the Abandonded Tank Farm (ST046). SS007 is the West End Oil/Water Separator (Separator Ponds 1-5), which historically consisted of a series of ponds designed as a remedial action to intercept oil-contaminated surface water drainage from area upgradient of the ponds, such as the Power Plant and an abandoned tank farm. Used oil and diesel are still present. Groundwater at 20 feet below ground surface. Site is a surface water drainage. Removal of Ponds 1 and 2 was completed in 1994. Engineered wetlands constructed in 1998 to attenuate hydrocarbons at Pond 3. The system now consists of three ponds and an Engineered Wetland area.

Action Information

Action Date Action Description DEC Staff
1/1/1965 Institutional Control Record Established Action added to counter the existing Institutional Control Removed action and validate CS DB Action Guidance. Actual date ICs established is unknown. No Longer Assigned
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. The oil/water separator is located at the old gravel pit sites on the west beach. This facility is an unlined gravel impoundment approximately 50 feet in length by 25 feet wide. The Air Force built a dike around the shore in the area of the gravel pit to provide protection from storms and sea surge. This dike has formed impoundments which now act as a fail safe for the separator by preventing oil spills from reaching the ocean. It was observed that the soils and tundra in the vicinity of the oil/water separator are saturated with soil and standing water had oil sheens. The rocks downstream of the separator are oil stained. Fumes near the facility are very strong. Potential for contamination exists at this site. No Longer Assigned
11/22/1985 Update or Other Action CH2M Hill trip report dated 1985.John Lambert showed CH2M Hill workers the oil-water separator they had recently constructed. It is located down-gradient from the diesel oil tank farm and collects a major amount of storm runoff from this area. The separator is a surface impoundment constructed primarily from broken rock and gravel transported from the north side of the island. A pipe installed in a slanted position on the downhill end of the pond serves as the outlet for water. There are no skimming facilities for removing oil. No Longer Assigned
6/1/1986 Update or Other Action Phase II - Task I Presurvey Report, Shemya Air Force Base and King Salmon Air Force Station. Monitoring Well 1 will be installed to monitor water quality adjacent to downgradient oil-water separator. Samples will be collected from all 4 oil-water separators, on 3 separate occasions, to follow the drilling program. Shemya is currently building a series of oil-water separators. No Longer Assigned
9/25/1987 Update or Other Action Shemya Field Trip Notes, September 15-19, 1987. Prepared by CH2M Hill. Observed three connected ponds as part of the drainage system on the northwest part of the island near the oil tank farm. A very slight oil sheen was noticed in some areas of all three ponds. A strong petroleum odor was noted near and downstream of Pond No. 5. Pockets of oily sediments were observed in this area; blackened sediments that were oily to the touch. No Longer Assigned
7/29/1988 Update or Other Action Installation Restoration Program, Stage I Workplan, Shemya Air Force Base, Alaska. Prepared by CH2M Hill. The west end oil/water separator is a series of three earthen ponds constructed near the Bering Sea coast, southwest of the fuel tank farm. Its function is to intercept at least a portion of the oil-contaminated surface waters draining from areas to the northeast before they get to the ocean. A slight oil sheen was noted in some area of all three ponds. A strong petroleum odor was particularly noted near and downstream of the downstream pond. No Longer Assigned
9/9/1988 Update or Other Action Installation Restoration Program, Stage I Quality Assurance Project Plan, Shemya Air Force Base, Alaska. One objective of the Stage 1 work is to obtain data needed to design improvements to the West End Oil/Water Separator. No Longer Assigned
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. No Longer Assigned
8/10/1990 Update or Other Action Installation Restoration Program, Stage I Final Technical Report for Shemya Air Force Base, prepared by CH2M Hill. The West End Oil/Water Separator is a series of five unlined, earthen ponds constructed near the Bering Sea cost. Its function is to intercept at least a portion of the oil-contamination. The discharge from Pond 5 appears clear. However, after passing through the culvert beneath the road, it contains an oily sheen. This is one of four sites recommended for the highest priority future investigations due to it potentially affecting the base water supply. No Longer Assigned
9/14/1990 Update or Other Action Installation Restoration Program, Stage 2 Final Workplan, Shemya Air Force Base. Prepared by CH2M Hill. No soil or gas geophysical investigations are planned for any of the four sites. 3 borings are planned for the PS-3 site, and 7 borings will be advanced at the separator ponds upstream of PS-3. Two surface water samples will be collected from Pond No. 5 and analyzed for TPH. No Longer Assigned
6/25/1991 Update or Other Action Site Summaries for Shemya Air Force Base, Alaska Installation Restoration Program. Continuing problems may be ongoing due to POL seepage through the peat layer south toward the oil/water separator area. Additionally, the likely source of POL contamination for Ponds 1 and 2 may be underground storage tanks at the Power Plant, as well as old POL seeps that may migrate, over time, though the peat layers towards the ponds. It is recommended that the existing oil/water separator ponds be upgraded considering the POL seeps and future fuel spillage. Pond remedial design construction is anticipated for 1992. 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. West End Oil/Water Separator System (PS-3) listed as one of the sites that are currently causing pollution releases to the land and waters of the state. Dan Hartung
10/4/1991 Update or Other Action Installation Restoration Program (IRP) Field Investigation Plan, Shemya Air Force Base, Alaska (2 volumes). The groundwater will be assessed using 12 wells because the site is so large and complex. The major concern is related to TPH contamination in soil, surface water, and groundwater. Restoration of PS-3 will be considered complete after: 1) significantly contaminated soil is either removed or otherwise controlled, and 2) significant groundwater contamination is not detected at monitoring wells. Dan Hartung
10/30/1991 Update or Other Action Sample Analyses Tank 123 - Shemya 70079/70081 Dan Hartung
6/23/1992 Update or Other Action EPA has reviewed a Preliminary Assessment and the Field Investigation Plan.EPA recommends that all samples be screened with a organic vapor analyzer (OVA) or similar instrument calibrated to benzene and TCE. At the West End Oil Water Separator - Analyze for TCL VOC's. Ray Burger
2/1/1993 Update or Other Action Shemya Air Force Base, Alaska 1992 Installation Restoration Program Field Investigation Report, prepared by CH2M Hill; report finalized in February 1993. During the 1992 investigation, a limited geophysical survey was conducted in the immediate vicinity of four of the five ponds to determine if any large quantities of buried metal was present. The survey indicated the following: 1) A utility line is located on the south side of the road between ponds 1 and 2, and a culvert connects the two ponds. 2) A small area of buried metal is present near the southeast side of Pond 2. 3) Two probable utility lines were detected near the road on the north side of Pond 3. A small anomaly, possibly a small piece of scrap metal, was observed on the southeast side of the pond. Ray Burger
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. An LSI will be conducted during 1993 to determine if early action(s) is warranted for the discharge from the oil/water separator to the tidal pool, or for floating product removal from any of the wells or ponds. During the LSI surface water samples will be collected of the effluent from the oil/water separator, in addition to groundwater, samples collected from the well points installed around each of the three areas. Ray Burger
8/1/1994 Update or Other Action Community Relations Plan submitted by Jacobs Engineering. SS07 is considered to be a POL source area. Contaminants detected in previous studies include TPH and lead. Floating fuel product has also been measured in several wells in the past. Currently, there is very little floating fuel product on the water table in this 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. A removal action will be conducted at Ponds 1 and 2 during the 1994 field season. The ponds will be drained, and the sediments will be excavated to a depth of approximately 3 feet below the bottom of the ponds. Confirmation samples will be taken. The objectives of the 1994 investigation at SS07 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
2/1/1995 Update or Other Action Community Relations Photo Notebook; Remedial Investigations, Feasibility Studies and Remedial Actions. In 1994, a removal action was conducted at two oil/water separator ponds at Source Area SS07. At Ponds 1 and 2 floating fuel product was visible on top of the pond water and soils around the pond edges were heavily stained with oil. Ray Burger
3/15/1995 Update or Other Action Construction Rigging, Inc. Field Report, Oil/Water Separators, Eareckson Air Station, Alaska. Final report. Prepared by Environmental Management Corporation. Ray Burger
4/15/1995 Update or Other Action Revised 1994 Well Abandonment Summary Report. Prepared by Jacobs Engineering Group. Ray Burger
6/15/1995 Interim Removal Action Approved Eareckson AS, Remove/Replace Ponds 1 and 2 West End Oil/Water Separator, Final Report. Prepared by 611 CES/CEOR. Surface runoff is intercepted by shallow ditch which direct the water to Pond 1. Pond 1 was connected to Pond 2 by a 10 ft long culvert. This project started with the collected of pre-excavation samples, followed by excavation work, followed by grab and confirmation samples. The excavated pit at Ponds 1 and 2 was backfilled with clean material and an impermeable liner was placed in the pit. The new oil/water separator pond was completed and in service on 14 Dec 94. Ray Burger
8/1/1995 Update or Other Action Technical Memorandum 1995 Field Activities submitted by Jacobs Engineering. Work to be performed at SS07 will concentrate on the newly constructed pond near former Ponds 1 and 2 and the area adjacent to Pond 3. The following activities are planned: 1) One surface water sample will be collected at the location of the new pond. 2) Near Pond 3, one surface-water and one sediment sample will be collected from within the drainage downgradient from Tank 123. One surface-water sample and one sediment sample will also be collected at the inlet to Pond 3. 3) Flow measurements will be collected if surface water is observed in the pond, and at locations within the drainage from Tank 123. Ray Burger
8/1/1995 Update or Other Action Remedial Investigation/Feasibility Study Report Volume I submitted by Jacobs Engineering. P450 screening, used to identify potentially impacted tidal areas, sediment toxicity testing and chemical analysis were completed at SS07. Mussel tissue sampling and analysis were completed only at the tidal pond adjacent to SS07. SS07 Ponds 1 through 5 support aquatic habitat in Management Zone 7. Hazardous constituents detected in MZ7 are primarily confined to the SS07 drainage. Ray Burger
1/1/1996 Update or Other Action Technical Memorandum, Results of 1995 IRP Field Program (dated January 1996). At SS07, three surface water samples and two sediment samples were collected in 1995. No VOCs were detected in either medium, but a variety of inorganics were detected in concentrations greater than background. A visible fuel sheen was observed in the drainage ditch originating from stained soils along the bank. 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). The primary exposure points evaluated at the SS07 source area included the three remaining oil/water separator ponds, the drainage between the ponds, and the tidal pool at the west end of the drainage. After evaluating all environmental media and performing Tier I screening and a Tier II quantitative risk assessment, the only exposure pathway and potential ecological risk was the surface water at Pond 3. The presence of a slight hydrocarbon sheen presents a physical hazard to environmental receptors. The sources of the hydrocarbon sheen are sediments in Pond 3, the diesel ponds in the ST46 drainage, and the Tank 123 drainage ditch. Ray Burger
2/12/1997 Site Added to Database Site added by Shannon and Wilson, Inc. S&W-Miner
1/1/1998 Update or Other Action Remediation Plan for SS07 Engineered Wetland and ST46 Well Decommissioning submitted by Jacobs Engineering. The remedial action objective for Pond 3, eliminating the petroleum hydrocarbon sheen, will be achieved through construction of an engineered wetland. The engineered wetland will enhance natural biological degradation of petroleum hydrocarbons in the surface water by providing an environment for degradation to occur and by controlling the hydraulic residence time of the water. Gives additional information on size, flow estimates, plant selection, performance, temperature effects, and construction details. Gretchen Pikul
8/1/1998 Update or Other Action Basewide Monitoring Program Work Plan submitted by Jacobs Engineering. The current site status of SS07: Ponds 1 and 2 were removed in 1996, and a sheen has been noted on Pond 3. The most recent site investigation results for SS07 indicated that POL constituents were present in soil and groundwater at levels which could pose a potential risk if contaminant exposure resulted. A remedial action was identified for the downgradient of the pond area to promote degradation of the fuel sheen identified on the surface of Pond 3. Field team will perform a site inspection to note extent of hydrocarbon sheen on the surface of Pond 3. Groundwater samples will be taken, and floating fuel product will be removed with a bailer and collected for later disposal. Gretchen Pikul
9/1/1998 Update or Other Action Remedial Action Work Plan Source Areas SS07 and ST46 submitted by Jacobs Engineering. The steps for Pond 3 remedial action at SS07 include: 1) Preconstruction site visit, site mobilization and equipment staging 2) Decontamination pad setup 3) Utility relocation/clearance 4) Surface water diversions and Pond 3 dewatering 5) Excavation and grading 6) Outlet structure Installation 7) Final grading and topsoil placement 8) Erosion control installation 9) Treatment cell hydration 10) Vegetation planting 11) Equipment decontamination 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). Ponds 1 and 2 were excavated in 1994. RI sampling included surface soil, subsurface soil, surface water, sediment, groundwater, mussels, and vegetative tissue. Risk assessment found no human health risk but a possible ecological risk. Engineered wetlands recommended at site of Pond 3; these were constructed in 1998. Semiannual sampling will be conducted. 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). SS07 listed as a site requiring further remedial action. 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. The BMP identified floating fuel product removal activities for three wells at this site, however, the field team was only able to recover product from one well. About 0.07 gallons of product were successfully removed from well AP1470 using a bailer. Groundwater samples were collected at two site wells next to Pond 5 to identify upgradient flow characteristics for Pond 5, and downgradient characteristics of the former Ponds 1 and 2 areas. A single surface water sample and a sediment sample were also collected from the downgradient drainage area of the Pond 3 outflow. Analytical results are listed. 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
7/21/1999 Meeting or Teleconference Held Meeting with Air Force on 4 documents: Closure Sampling Plan, Abandoned Runway B (draft dated March 1999) also discussed in a May 11th meeting; Response to ADEC's December 10, 1998 comments regarding Technical Memorandum Contaminated Soil Stockpiles Sampling Results (dated July 1997) and Final Post Construction Report for Contaminated Soil Stockpiles Remedial Action (dated August 1998); Closure Confirmation Sampling Approach for Landspread Soils (dated April 1999); and Eareckson Air Station Soil Stockpile History and Documentation (dated March 1999). Received Final Workplan on the Closure Sampling Plan of Soil Treatment Cell, Abandoned Runway B (dated May 1999). Gretchen Pikul
11/30/1999 Site Ranked Using the AHRM Initial ranking. Gretchen Pikul
1/31/2000 Update or Other Action Comprehensive Basewide Monitoring Report, June 1999 Basewide Monitoring Activities and Findings submitted by USAF. The Engineered Wetland at SS07 has been effective in reducing the presence of the persistent hydrocarbon sheen and concentrations of related organic compounds in surface water in the SS07 drainage. Floating fuel product observed at SS07 wells has steadily decreased over time. The following recommendations are made for SS07: 1) Continue to monitor wells MW-19 and MW-37 every 2 years. 2) Continue to remove product from wells AP1218 and AP1470 on a yearly basis until no product is encountered in two consecutive events. 3) Continue to monitor Engineered Wetland Inlet and Outlet locations for VOCs, SVOCs, and DRO every year. 4) Continue to visually monitor surface water below wetland for hydrocarbon sheen. 5) Continue to monitor sediment below wetland every 4 years. Gretchen Pikul
7/24/2000 Update or Other Action SS07 Engineered Wetland Optimization Plan Final dated July 24, 2000. There are two primary objectives of this project: 1) determine if the remedial objectives of the Engineered Wetland are being met and 2) optimize the operation of the wetland to make sure it meets, or continues to meet, the remedial objectives. The first objective will be completed by: a visual inspection of the wetland area, measuring flow through the wetland, and a collection of environmental sediment and surface water samples. Based on the results of the visual inspection and sampling, the best methods for optimizing remedial effectiveness of the wetland area will be determined. Gretchen Pikul
8/16/2000 Update or Other Action Basewide Monitoring Program Workplan dated August 16, 2000. The following work will be conducted for site SS07: 1) Groundwater samples will be collected from two monitoring wells (MW-19 and MW-37) and analyzed for GRO, DRO, RRO, VOCs, SVOCs, and the full suite of TAL metals using analytical methods specified in the site-specific QAPP. 2) As much product as possible will be removed from the monitoring wells AP1218 and AP1470, and the amount recovered from each well will be recorded. Monitoring and sampling of the Engineered Wetland area will be conducted in conjunction with the SS07 Engineered Wetland Optimization Task activities. 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
4/6/2001 Update or Other Action Landspread Closure Confirmation Sampling Report - no IRP site designation, contaminated soil stockpiled on Abandoned Runway B from IRP and UST/AST sources all over the island (draft dated November 28, 2000, meeting on December 27, 2000 to discuss exceedences, ADEC comment letter dated January 8, 2001, final dated March 15, 2001, received on April 6, 2001) - contaminated soil in stockpiles from Tank 123 (ST08) and SS07, among other IRP sites and non-IRP sites. 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
7/23/2001 Update or Other Action Long-Term Operations Plan for SS07 Engineered Wetland (draft final dated January 16, 2001; received on May 31, 2001; ADEC comment letter dated June 1, 2001; 'response to comments' received and commented on by ADEC on June 4; based on 'response to comments' ADEC sent approval letter on July 23). Gretchen Pikul
7/27/2001 Update or Other Action Year 2000 Basewide Monitoring Program Report submitted by USAF. Samples were collected from the two wells (MW-19 and MW-37) to monitor groundwater conditions downgradient of the site. Samples were collected at the Engineered Wetlands to quantitatively evaluate the performance of the wetland in passively degrading hydrocarbons present in the surface water in the SS07 drainage. A visual inspection of the Engineered Wetland was conducted to observe any hydrocarbon sheen on the surface water within the cells and at the outlet. In addition to the collected of environmental samples, floating fuel product was removed from two wells near Tank 123. Floating fuel product observed in two wells (AP1218 and AP1470) near Tank 123 have shown a steady increase over time. Surface water and sediment sampling has shown the Engineered Wetland is functioning as intended in reducing DRO concentrations. Groundwater results show that VOC concentrations have generally increased in MW-37, but only DRO was detected above cleanup levels. Gretchen Pikul
12/10/2001 Update or Other Action Decision Document Report Volumes III and IV (draft dated March 1996; draft final dated April 1997 and received May 1997; ADEC comment letter dated October 1, 1997 with extensive comments; related meetings in 1998 on October 30, November 23, November 24, and December 30; related meetings in 1999 on January 20 and 26, February 2 and 25, June 22-25 during site visit, August 24 during FY00 project scoping meeting, and October 1; received Review Draft Decision Documents on November 30, 1999 ADEC comment letters in February 2000; related meetings in 2000 on January 4; related meetings in 2001 on January 4 and 16; ADEC comment letter on Draft Final Technical Memorandum - Risk Assessment Assumptions for Decision Documents (dated March 19) with comment resolution meeting on May 18, final memorandum dated June 2001; draft Proposed Plan for 6 sites received August 24, ADEC comment letter dated September 19, 'response to comments' received December 10, 2001). Gretchen Pikul
3/27/2003 Update or Other Action ADEC received the SS07 Constructed Wetland Inspections – inspection dates are November 2001, August 2001, and September 2002. Gretchen Pikul
8/31/2004 Update or Other Action Proposed Plan for Remedial Action; 1st draft dated July 2003 and received on July 16; received 1st draft of updated risk assessments on July 30; ADEC commented on August 4 and 5; comment resolution meeting August 22 and 27; internal briefing August 26; final Proposed Plan delayed due to funding issues and changes in Air Force guidance and policy; Proposed Plan comment resolution meeting on March 15, 2004; ADEC participated in calls and e-mails with Air Force contractor regarding Proposed Plan status and wording in April and May 2004; 2nd draft Proposed Plan submitted on June 1, 2004 and ADEC sent comments via e-mail on June 3; 2nd draft of updated risk assessments for FT01 and FT03, and FT02 and SS07 received June 7 and 14, respectively; ADEC comments (Lindsay Smith, ADEC Risk Assessor) were sent on July 1; July 22 ADEC call to Air Force on status of Updated Risk Assessments and comment resolution meeting date; Updated Risk Assessments comment resolution teleconference on July 26 – updated and final Air Force Comment Response, cumulative risk calculation spreadsheets, and information on outstanding issues to be submitted by early 1st week of August; ADEC sent e-mails on status of outstanding deliverables on August 6 and 13, e-mails and calls regarding this information occurred in August and information will not be available before September 1 for ADEC Risk Assessor to review (ADEC Risk Assessor to be back in office in October 2004). Gretchen Pikul
3/23/2005 Meeting or Teleconference Held ADEC and Air Force project managers conducted a site visit to Eareckson AS from 15 March to 22 March 2005. The purpose of this visit was to provide an opportunity to view and to discuss the status of ongoing contaminated sites work being performed by the Air Force on Shemya Island. Jeff Norberg
8/1/2005 Update or Other Action Proposed Plan for Eareckson AS Sites FT01, FT02, FT03, and SS07 submitted by USAF. The preferred remedial alternative for SS07 is ICs and LTM. The proposed ICs include: 1) ICs will be document in the Eareckson AS Base General Plan. 2) The Air Force dig permit and construction review system will be utilized to restrict incompatible activities such as excavation or other subsurface activities from the site. 3) Biennial visual inspections will be performed to verify the protectiveness of the ICs. Jeff Norberg
8/25/2005 Meeting or Teleconference Held Public meeting held August 24, 2005 1900 – 2100 hrs at the Loussac Library to discuss Proposed Plan for Eareckson AS Sites FT01, FT02, FT03, and SS07 Jeff Norberg
12/1/2006 Update or Other Action Human Health and Ecological Risk Assessments for FT01, FFT02, FT03, and SS07 submitted by USAF. Cumulative ecological His in excess of 1.0 were estimated for the mallard and rock sandpiper. Exceedence of the ecological HI criterion of 1.0 for these receptors was attributable to the presence of DRO in fresh surface water and sediment. For all remaining receptors, cumulative ecological hazard estimates were below the ADEC acceptable HI criterion of 1.0. 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
1/23/2008 Record of Decision USAF submits a DRAFT ROD for sites SS007, ST039 and OT048 for DEC review. Jonathan Schick
2/20/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Jonathan Schick
9/1/2008 Record of Decision Non-CERCLA Decision Document West End Oil/Water Separator Ponds (SS007) Underground Storage Tanks at Building 110 (ST039) submitted by USAF. Environmental media of interest at SS007 are surface water and sediment only. Groundwater below SS007 will be addressed under the ERP Site ST046 Decision Document. The selected remedial alternative for SS007 is ICs that allow the Engineered Wetland to perform as intended, and LTM to gauge the attenuation of hydrocarbons over time. ICs and LTM are easily implemented and the most cost-effective remedies that are compliant with ARARs and protective of human health and the environment. Jonathan Schick
9/1/2008 Update or Other Action CERCLA Record Of Decision West End Oil/Water Separator Ponds (SS007) Underground Storage Tanks at Building 100 (ST039) submitted by USAF. Environmental media of interest at SS007 are surface water and sediment only. Groundwater below SS007 will be addressed under the ERP Site ST046 Decision Document. There are no CERCLA hazardous substances identified as COCs or COECs at the two ERP sites; therefore, there is no authority to take action under CERCLA. Since no remedy is being selected under CERCLA for SS007, it is not necessary to determine if the remedy meets the statutory requirements. Jonathan Schick
2/12/2009 Record of Decision ADEC staff (J. Halverson) signed the Non-CERCLA Decision Document for the West End Oil/Water Separator Ponds (SS007) and Underground Storage Tanks at Building 110 (ST039) at Eareckson Air Station. The signing of this Decision Document was delayed because of disagreements over monitoring only surface water and sediment at the SS007 site, which is an engineered wetland designed to slow the flow and capture contaminants before the surface water discharges into the marine environment. The State wanted to ensure that the groundwater and soils in the area were adequately characterized before a decision could be agreed upon. The USAF and ADEC concurred that the groundwater and subsurface soil impacts in the area would be characterized in the ongoing RI work at ST046, a former large tank farm just upgradient of the engineered wetland. The signature page was modified with the following language, “ST046 is upgradient from SS007 and is suspected to be a source for contamination w/in SS007. Due to uncertainty on groundwater/surfacewater interaction, the sources of petroleum contamination w/in SS007, the extent of soil contamination , and the fact that this Decision Document is focused on impacts to surface water /sediment, ADEC reserves the right to request additional characterization or cleanup in the future, if these issues are not adequately addressed in the ST046 ROD/Decision Document.” The original signature page was mailed to the 611th CES and a copy was inserted to the State’s copy for our records. Jonathan Schick
10/27/2011 Site Characterization Report Approved Contaminated Sites Staff submitted a letter to the Air Force Project manager stating that all of the agreed upon changes were made to the 2011 Summary Report for Long Term Monitoring and Maintenance Activities at Eareckson Air Station for sites FT002, SS007, OT048, LF018, LF024, and LF026. The Final Report is approved. Jonathan Schick
7/1/2012 Update or Other Action Final Work Plan for Long-Term Monitoring & Maintenance Activities. Per the Decision Document for SS007, the selected remedial action was ICs that allow the Engineered Wetland area to perform as intended and long-term monitoring to gauge the attenuation of hydrocarbons over time. As part of the upcoming field event, the following field activities will be completed: 1) Surface water samples will be collected from the Pond 3 inlet, Pond 3 outlet, and at a downstream location near the discharge to the tidal area at Shemya Falls. Surface water samples at these locations will determine DRO, TAH and TAqH concentrations. 2) Sediment samples will be collected from the inlet and outlet of Pond 3 and further downstream near the tidal area at Shemya Falls to determine DRO and RRO concentrations. Jonathan Schick
12/1/2012 Update or Other Action The USAF submitted the 2012 Land Use Control Management Plan, which included land use controls for SS07 at Eareckson Air Station. Jessica Morris
10/10/2013 Update or Other Action The ADEC Contaminated Sites Program approved the Environmental Long Term Management Report for several sites. Continued long term monitoring was recommended for SS007. Jessica Morris
1/9/2014 Update or Other Action The ADEC Contaminated Site Program approved the Final Eareckson Air Station Five Year Review Report. Recommendations in the report included continued monitoring at SS007, preventing rust on the monitoring platform rails of the surface water collection structure, conducting sampling to inspect the wetlands cell, removing an orphan drum, and repairing the pond liner. Jessica Morris
8/11/2014 Institutional Control Record Established 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. Three surface water samples will be taken from SS007 and tested for DRO, BTEX, PAHs, TAH, and TAqH. Four Sediment samples will be taken at SS007 and tested for DRO and GRO. 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. As directed by the Site SS007 decision document, sampling can only be discontinued after two consecutive monitoring events where the target analyte concentrations are below their risk based cleanup levels. This site has not met risk based cleanup levels for surface water and the ICs and LTM will continue as directed by the decision document for this site. Jessica Morris
7/9/2015 Institutional Control Update ADEC approved the July 2015 U.S. Air Force Land Use Control Management Plan, Pacific Air Forces Regional Support Center Installations. The plan includes land use controls for SS007 at Eareckson Air Station. 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
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 Report or Workplan 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

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
GRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Signed CS Determination

Requirements

Description Details
Excavation / Soil Movement Restrictions
Surface water monitoring
Periodic Review

Missing Location Data

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