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Site Report: Driftwood Bay RRS SS007 Spill/Leak No. 7 at POL Tank Farm

Site Name: Driftwood Bay RRS SS007 Spill/Leak No. 7 at POL Tank Farm
Address: SS007, aka AOC09 POL Tank Area, Dutch Harbor, AK 99692
File Number: 2541.38.001
Hazard ID: 96
Status: Cleanup Complete - Institutional Controls
Staff: Sarah Bernhardt, 9072697527 sarah.bernhardt@alaska.gov
Latitude: 53.975277
Longitude: -166.849484
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

This former Radio Relay Station was located on the northeast side of Unalaska Island in the Aleutian Islands chain. The site was activated in 1961 and deactivated in 1977. The site consisted of a composite building with dormatories, office space, storage space, a vehicle maintenance shop, and equipment for standby power generation; 2 billboard antennas and feed horns (White Alice arrays); 2 receiver antennas; POL storage and distribution facilities; an equipment-maintenance building; ammunition storage shed; a water supply system; a disposal area; and an airstrip. All structures were demolished or removed in 1991. The RRS was formerly known as a WACS (White Alice Communications System). The site is a former fuel tank farm (FKA AOC09) with residual DRO contamination in soil and groundwater. Groundwater at the site is shallow and is not a current or likely future drinking water source and it discharges into the adjacent Snuffy Creek and Driftwood Bay. Sampling and field observations did not identify any adverse impacts to the surface waters. ICs are proposed to document the location of residual contamination and that the groundwater should not be used as a drinking water source. Monitored Natural Attenuation is proposed to document whether DRO plume in groundwater is shrinking and the concentrations are decreasing.

Action Information

Action Date Action Description DEC Staff
3/14/1986 Update or Other Action Environmental Assessment, Defense Environmental Restoration Account (dated March 14, 1986). Former Staff
1/15/1987 Update or Other Action Defense Environmental Restoration Program (DERP) Inventory Project Report (January 1987). Former Staff
7/13/1994 CERCLA PA Preliminary Assessment (dated January 1994) prepared by CH2M Hill; received on July 13, 1994. AOC09: POL Tank Area. The POL Tank Area includes the two former POL storage tarLks, the fuel pumphouse and a former 25,000-gallon MOGAS tank. Ray Burger
5/25/1995 Document, Report, or Work plan Review - other Staff commented on the draft work plan (site investigation, sampling and analysis plan, quality assurance plan). Staff commented that 3 soil samples along a 3 mile long pipeline is insufficient to come to any conclusion regarding the contamination present or absent at the pipeline. Historically reported areas of contamination were found but the location is unknown and useless for directing current field efforts. Limited sampling (one sample) from doorways, landfills will not likely produce any data to lead to any kind of decision. Soil sample locations should be from original grade since many areas have been regraded during past remedial actions. See site file for additional information. Ray Burger
5/25/1995 Document, Report, or Work plan Review - other Staff provided comments on the draft SI report. Page 4-3, Section 4.8, POL Tanks, Fuel Pumphouse and 25,000-Gallon MOGAS Tank The report states that: "Potential impact from the 25,000-gallon MOGAS tank along the beach is not feasible based on the site conditions..." Specify what site conditions these are and why impact is not feasible. Ray Burger
2/8/1996 Update or Other Action Final Preliminary Assessment / Site Inspection (dated January 1996) prepared by EMCON; received February 8, 1996. Includes one IRP Site: OT01 - Former Composite Building Area. Eleven Areas of Concern: AOC01 Former Composite Building Area, AOC02 Septic Tank and Leach Field, AOC03 Composite Building POL Outfall, AOC04 Former Water Supply Pumphouse, AOC05 Former Lighting Vault, AOC06 Former Drum Storage Area, AOC07 Former Airstrip MOGAS Tank, AOC08 Old Disposal Area, AOC09 POL Tank Area, AOC10 Fuel Pipeline Area and AOC11 Former USTs. Ray Burger
2/23/1996 Update or Other Action Final Management Action Plan (MAP) dated February 1996; received February 23, 1996. Ray Burger
12/29/1997 Update or Other Action Management Action Plan (draft dated August 1997; ADEC comment letter dated December 10, 1997; final report dated Decmber 29, 1997). Gretchen Pikul
1/9/1998 Site Added to Database Site added by staff. Gretchen Pikul
7/26/2005 Update or Other Action Preliminary Assessment/Site Investigation Quality Program Plan (Work Plans) for Driftwood Bay RRS (entire installation) and Duncan Canal RRS; draft dated March 2005, ADEC received on March 25; ADEC comment letter on April 29; comment resolution meeting on May 3; Air Force final PA/SI QPP dated June 2005 received on July 26. Jeff Norberg
2/17/2006 Update or Other Action Preliminary Assessment/Site Investigation Report for Driftwood Bay RRS for entire installation; draft dated October 2005 received on October 19; ADEC comment letter on November 23; Air Force response to comments received electronically December 15; ADEC approval letter issued December 19, 2005; Final PA/SI report dated December 2005 received February 17, 2006. Based on the results of this investigation, it is recommended that additional study be performed to determine the extent of contamination in surface soil at the former tank farm area at SS007. It also recommended that a subsurface investigation be performed to determine if subsurface soil or groundwater has been impacted by fuel constituents associated with the former tank farm area. Because the beach at the likely former locations of the 25,000-gallon MOGAS tank and the possible beach landing area at SS007 have been aggressively reworked through natural processes leaving only large cobbles, it is highly unlikely that any contaminants are present. However, it is recommended that additional limited study be conducted to confirm this conclusion. Jeff Norberg
7/21/2006 Meeting or Teleconference Held Stakeholders met for a 3-day Triad Systematic Planning meeting between July 18 and July 20, 2006 to discuss plans to address residual contamination at the former Driftwood Bay RRS facility. The primary purpose of this meeting was to reach an understanding of data quality objectives for each site at Driftwood Bay for eventual site closure and land transfer. Several sites identified as petroleum only, will be investigated in accordance with Alaska State regulations. The investigation and closure for remaining sites will comply with the Comprehensive Environmental Response, Compensation, and Liability Act. Jeff Norberg
7/26/2007 Update or Other Action DEC received a copy of a letter from EPA to the Air Force documenting EPA';s decision of No Further Remedial Action Planned under EPA's Superfund Program. This decision does not preclude any further action at the site by another EPA program, the State or other Federal agency. EPA's NFRAP designation does not relieve your facility from complying with appropriate Alaska state regulations. The Superfund Amendments and Reauthorization Act (SARA) of 1986, Section 120(a)(4) requires federal facilities to comply with state cleanup requirements and standards when not listed on the NPL. If new or additional information becomes available suggesting that the site may warrant further evaluation, EPA will re-evaluate the site accordingly. John Halverson
2/22/2008 Site Characterization Report Approved Contaminated Sites staff reviewed a site characterization report for the Driftwood Bay Radio Relay Station. The site had an upper site where the bill board antennae and composite building were located. The lower camp area contained the support facilities such as the airstrip and fuel tank farm. Several areas have contamination over method 2 cleanup levels. A risk assessment is being done to assess pathways and risk for those areas. The report had quality assurance problems with lab analytical data mostly concerning spiking errors for the surrogates in volatiles Jeff Brownlee
3/20/2008 Meeting or Teleconference Held Contaminated Sites staff met with the Air Force 611 and their contractor on the Driftwood Bay Long Range Radar Site. The meeting was to discuss comments on the draft site characterization report. All issues were resolved with exception of how to flag volatile organic carbon data with surrogate quality control errors. The contractor made a good argument that the data shouldn’t be rejected; however the state is bound by the National Functional Guidelines for data criteria. We will continue discussion whether the Air Force can use a modified flag so the data can still be used as a screening tool Jeff Brownlee
4/4/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Jeff Brownlee
12/19/2008 Meeting or Teleconference Held Contaminated Sites staff participated in a comment meeting on the draft risk assessment for the former Driftwood Bay Radio Relay Station. There is ecological risk for various species at three sites from lead and Polycyclic Aromatic Hydrocarbons (PAHs) well over acceptable state risk levels. One site is a landfill where ash was sampled from a test pit. One site is a former POL tank farm near the coast and another site is an electronic debris area with elemental lead from battery carcasses on the ground surface Jeff Brownlee
4/7/2009 Meeting or Teleconference Held Staff participated in a comment resolution meeting for an interim remedial action at the former Driftwood Bay Radio Relay Station. Lead levels in soil at the Electronic Debris Area are well over human health risk levels. The Air Force is proposing using a phosphate based chemical binder to reduce the bioavailability of the lead in soil to below hazardous waste levels. A final remedy will be decided at a later time Jeff Brownlee
5/8/2009 Risk Assessment Report Approved Contaminated Sites staff reviewed and commented on revised draft documents for the Driftwood Bay former Radio Relay Station on Unalaska Island about 15 miles from Dutch Harbor. The Air Force 611th has performed a remedial investigation/site characterization and risk assessment for the site. Risk associated with lead in soil at two sites is over state human health and ecological standards. The site will require institutional controls for a landfill and petroleum contamination in soil and groundwater. Future remedial action and further investigation is anticipated for the site Jeff Brownlee
9/11/2009 Update or Other Action In 1991, the US Army Corps of Engineers, under the Formerly Used Defense Site (FUDS) Program, contracted with Anderson Excavating and Wrecking Company to demolish buildings and cleanup solid wastes at the site. The composite building, POL pump building, airport storage building, ammunition building, water pump house, lighting vault, four billboard antennas and other wastes were demolished and buried in an on-site landfill south of the former composite building. Concrete foundations were left in place. The Corps hired Environmental Management to remove the above and underground fuel storage tanks and pipelines, which were cut up and disposed in the on-site landfill. A total of 350 55-gallon drums were removed. Fuel contaminated soil was excavated, thermally treated and disposed of in the landfill. A 55-gallon drum of PCB and a drum containing lead acid batteries were removed from the site for proper disposal. Subsequently, it was determined that the Air Force still controls the site as the public land withdrawl has not been relinquished. Further cleanup work on the site is not eligible under the FUDS Program. DEC and the Corps have signed a Containerized / Hazardous, Toxic or Radiologiacl Waste (CON/HTRW) Project Closeout Report (Aug. 2009) documenting no additional CON/HTRW work is eligible under the FUDS Program. The USAF is responsible for remaining environmental restoration work at the site. John Halverson
11/6/2009 Meeting or Teleconference Held Contaminated sites staff participated in an update meeting with project managers from the USAF 611th and their contractor. Discussion included the proposed timeline and scope of work for the 2010 and 2011 field seasons for installing monitoring wells and institutional controls at 4 POL sites and the status of 8 other sites (5 are proposed to be DEC-determined as cleanup complete with no further action; 3 sites are being addressed under CERCLA). Curtis Dunkin
2/8/2010 Update or Other Action A cleanup complete w/o IC's determination has beeen issued for several other Driftwood Bay sites. Site SS007 – Tank Farm is recommended for Monitored Natural Attenuation with Institutional controls (ICs). The site is a former fuel tank farm with residual DRO contamination in soil and groundwater. Groundwater at the site is shallow and is not a current or likely future drinking water source and it discharges into the adjacent Snuffy Creek and Driftwood Bay. Sampling and field observations did not identify any adverse impacts to the surface waters. ICs are proposed to document the location of residual contamination and that the groundwater should not be used as a drinking water source. Monitored Natural Attenuation is proposed to document whether DRO plume in groundwater is shrinking and the concentrations are decreasing. As of the date of this determination, DRO and benzopyrene concentrations in soil are below Method 3, however ground water concentrations exceed Table C values. The Air Force currently plans to install monitoring wells in 2011. Curtis Dunkin
2/8/2010 Cleanup Level(s) Approved ADEC Determination of Final Compliance for Driftwood Bay Radio Relay Station (RRS) Sites One site (SS007 – Tank Farm) is recommended for Monitored Natural Attenuation with Institutional controls (ICs). The site is a former fuel tank farm with residual DRO contamination in soil & groundwater. Groundwater at the site is shallow & is not a current or likely future drinking water source & it discharges into the adjacent Snuffy Creek & Driftwood Bay. Sampling & field observations did not identify any adverse impacts to the surface waters. ICs are proposed to document the location of residual contamination & that the GW should not be used as a drinking water source. Monitored Natural Attenuation is proposed to document whether DRO plume in GW is shrinking & the concentrations are decreasing. Please continue to coordinate with us on development & implementation of the ICs for sites OT001, SS010, & SP003 & the work plan & ICs for site SS007. Once the ICs are in place for sites OT001, SS010 & SP003, the status of these sites will be changed to Cleanup Complete with ICs. After ICs are in place & the GW contaminant plume at SS007 is shown to be attenuating the status of that site will also be changed to Cleanup Complete with ICs. Curtis Dunkin
7/17/2010 Site Visit Contaminated sites staff conducted site visits and observations of field work and soil screening and sampling being conducted by the U.S. Air Force 611th and their contractor. Travel to the site was via boat out of Dutch Harbor, Alaska. The primary purpose of this mobilization was to conduct soil screening and sampling (incl. TCLP) to address data gaps associated with two areas within the LF006 site where soil is contaminated with lead at levels ranging between only a few mg/Kg and up to 72,000 mg/Kg. The former POL tank farm (site SS007) and the former POL pipeline (site SS008) were also inspected during this site visit. Prospective installation locations for groundwater monitoring wells at SS007 were inspected and discussed. Curtis Dunkin
2/2/2011 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 71076 name: DRO in soil and groundwater Bianca Reece
1/26/2015 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 71076 DRO in soil and groundwater. Debra Caillouet
7/24/2015 CERCLA Remedial Design/Remedial Action Plan Approved Final Remedial Action (RA) Work Plan for Remedy Implementation at the Former Driftwood Bay Radio Relay Station, Alaska July 2015 received. During the RA, a total of six monitoring wells will be installed at SS007 in accordance with ADEC well construction guidance (ADEC, 2013). One round of groundwater monitoring will be performed at SS007 in 2015 in accordance with the ROD, and groundwater samples will be analyzed for DRO only. Activities at SS007 in 2015 also include implementing ICs and inspecting the site to confirm ICs are in place, as prescribed in the ADEC Determination of Final Compliance for Driftwood Bay RRS Sites (ADEC, 2010a). The ICs will consist of Land Use Controls (LUCs) which will be incorporated into the 611th Civil Engineering Squadron (CES) LUC Management Plan. A Notice of Environmental Contamination will be placed in the Alaska Department of Natural Resources’ land records by the USAF. ICs will also consist of warning signs posted at the extents of SS007. Debra Caillouet
3/11/2016 Update or Other Action Follow-on Remedial Action Work Plan Draft Final received for review and comment. Site SS007 is located along the beach northeast of Lower Camp and airstrip. The 2015 RA included the installation of six well points. Of the six well points installed, four were sampled. The remaining two well points did not contain sufficient water for sampling. Analytical results for DRO from the well points sampled indicated all locations were above the groundwater cleanup level (GCL) for the site. SS007 – Former Fuel Storage Area at the Beach. Upon receipt of funding from AFCEC, one round of groundwater monitoring will be conducted in 2016 at six well points that were installed and sampled during the 2015 RA, as part of long-term monitoring (LTM) of groundwater for SS007. See site file for additional information. Louis Howard
4/1/2016 Update or Other Action Draft Final Long-term Groundwater Monitoring Report received. DRO was detected above the groundwater cleanup level of 1.5 milligrams per liter (mg/L) at each of the four well points sampled. DRO: WP-01 10.5 mg/L, WP-04 13.2 mg/L, WP-05 4.4 mg/L and WP-06 3.75 mg/L. Results for all analytes were above groundwater cleanup levels in Table C, 18 AAC 75 (ADEC, 2015). The August 2015 monitoring event is the first which resulted in all contaminants of concern being found in concentrations above groundwater cleanup levels for Site SS007. Annual groundwater monitoring will continue until concentrations of all contaminants of concern are shown to be steady state or decreasing. Louis Howard
4/7/2016 Document, Report, or Work plan Review - other Staff reviewed the draft-final 2016 Long-term Groundwater Monitoring Report for the Former Driftwood Bay Radio Relay Station. ADEC will approve the document as submitted without any changes. The August 2015 monitoring event was the first which resulted in all contaminants of concern being found in concentrations above groundwater cleanup levels for Site SS007. ADEC concurs with the conclusions that annual groundwater monitoring should continue until concentrations of all contaminants of concern are shown to be steady state or decreasing. Louis Howard
11/16/2016 Update or Other Action Groundwater Use Determination request for Site SS007 (Former Fuel Storage Area at Beach received for review and comment. Groundwater in the vicinity of SS007 is not used for a private or public drinking water system. The nearest private or public drinking water system is located over I 0 miles away in Dutch Harbor. Groundwater transmissivity is dependent on tidal variations at the site. Saltwater intrusion at Site SS007 is inferred based on con-elation between the local groundwater elevation and tidal water level data. Additionally, conductivity measured in all of the well points exhibits a positive correlation with tidal water levels, supporting the influence of seawater on groundwater at the site. No need for a temporary or permanent drinking water source in the vicinity of Site SS007 has been identified. The remote location of the site makes it unlikely that a drinking water source would be necessary in the foreseeable future. If the need arose, it is most likely that surface water with treatment would be the more economically feasible option as an alternative source to groundwater as was previously implemented when the site was operational. See site file for additional information. Louis Howard
12/5/2016 Update or Other Action Draft LTM for GW report received for review and comment. In 2015, six well points were installed at SS007, four of which were developed and later sampled as part of the long-term groundwater monitoring program at the site. The remaining two well points contained insufficient water that year. DRO concentrations exceeding the 18 AAC 75 Method Two groundwater cleanup criterion were encountered in all well points sampled, with DRO concentrations ranging from 3.75 to 10.50 mg/L. Results for DRO in Well Points WP-04 and WP-06 were above groundwater cleanup levels in Table C, 18 AAC 75. Groundwater levels were also up an average of 1.5 feet higher than when measured in 2015. The June 2016 monitoring event represented a decrease in concentrations of DRO for Site SS007, which is likely in part due to the higher groundwater levels at the site. Annual groundwater monitoring will continue until DRO concentrations are shown to be steady state or decreasing. Louis Howard
12/6/2016 Document, Report, or Work plan Review - other Staff provided comments on the pre-draft LTM for GW monitoring at SS007. Main comments were to require field notes/logbooks with every report, include analysis of contaminant trends in all monitoring reports, CC with ICs could be granted in the future if the DRO groundwater plume is steady state or shrinking. See site file for additional information. Louis Howard
2/6/2017 Update or Other Action Institutional controls report received for review and comment. On 11 June 2016, a site inspection was conducted at SS007. No erosion was observed at the site. The containment berm on the periphery of SS007 remains intact, as well as the tank foundations that protrude over the site grade. The river channel to the south of the site remains intact with no obvious erosion at the north bank. No obvious indications of recreational land use or wildlife were observed at the site. Groundwater monitoring wells remain in good condition at the site. Three warning signs were installed at the extents of SS007 in 2015 and remain intact. See site file for additional information. Louis Howard
8/16/2017 350 Determination Groundwater use determination (18 AAC 75.350) approved by ADEC. Based on the information provided, ADEC has determined that groundwater at SS007 is not considered a drinking water source as outlined in 18 AAC 75.350. ADEC’s determination is contingent upon receipt of written documentation by ADEC that land use controls prohibiting well installation and groundwater use at SS007 have been incorporated in the 611th CES Land Use Control Management plan and written documentation that the notice of environmental contamination has been placed in Alaska Department of Natural Resources’ land records for SS007. See site file for additional information. Jennifer Roberts
1/31/2018 Update or Other Action RAO & LTM report received for review and comment. Site conditions at SS007 (Former fuel storage area) were considered good, with LUC measures observed to be present and discernible. LUC signage was observed to be present, however the hardware holding the signs on the posts is deteriorating and not made of stainless material and would warrant replacement before the signs fall off. All of the sign posts are heavily rusted but the posts are made of heavy gauge steel and do not warrant immediate replacement. A review of the analytical results from the groundwater sampling at SS007 indicates that TAH and TAqH concentrations do not exist at levels above ADEC cleanup levels for the site. Well points WP-04 and WP-06 contained DRO concentrations above cleanup levels when sampled in June 2016, however the proximity of the well points to the adjacent water bodies suggests that the groundwater is tidally influenced, and thus should be regulated as surface water. Additionally, there is no surface water cleanup criteria for DRO, and because this site is unlikely to be considered as a likely future drinking water source, it is recommended that this site be considered for Cleanup Complete with ICs. See site file for additional information. Louis Howard
3/7/2018 Document, Report, or Work plan Review - other Staff commented on the draft RA-O/LTM report. Staff will require the land use control (LUC) signs be replaced and stainless steel (or other material not susceptible to corrosion) be used to attach the signs to the metal posts at the site. ADEC agrees that groundwater is connected to surface water and need not be considered a drinking water source as was determined in the 2010 letter from ADEC to USAF. However, continued monitoring of total aromatic hydrocarbons (TAH) and total aqueous hydrocarbons (TAqH) to demonstrate compliance with ADEC surface water quality criteria. A minimum of two consecutive rounds of well point sampling for TAH and TAqH is required below cleanup levels before any action can be taken on the site. Providing ADEC all the TAH/TAqH historical results in a table, will aid ADEC in approving a “cleanup complete with institutional controls” for SS007 in a letter memo to the Air Force. See site file for additional information. Louis Howard
4/9/2020 Document, Report, or Work plan Review - other Staff reviewed and approved the 2019 LUC/ICs & LTM report for SS002, SS007, SS010, LF006, and WP003. Louis Howard
3/18/2021 Update or Other Action Staff reviewed and provided comments for the Draft 2020 RAO, IC/LUC report for SS002, SS007, SS010, LF006, and WP003, dated March 2021. Cascade Galasso-Irish
5/19/2021 Document, Report, or Work plan Review - other DEC Reviewed the Draft 2020 Remedial Action Operations, Institutional Control/Land Use Control Report for Driftwood Bay Radio Relay Station and five sites: LF006, SS002, SS007, SS010, and WP003, dated March 2021, received on March 23 2021. Field activities included a site visit on September 13, 2020 to ensure ICs are enforced and site conditions continue to be protective of human health and the environment. RTC sent 4/20/2021, and report Final approved on this date. Cascade Galasso-Irish
8/3/2021 Document, Report, or Work plan Review - other DEC received and reviewed the Draft Final UFP-QAPP for Long Term Management Activities, Driftwood Bay Radio Relay Station, Alaska, dated March 2021. Comments send by ADEC on June 14th, and RTC and redline received on August 9th. The work plan describes the USAFs intent to collect groundwater samples from six wells at SS007 to determine whether trends indicate continued natural attenuation is occurring; conduct a review of institutional controls (ICs) at all sites (LF006, SS002, SS007, SS010, and WP003), and conduct a landfill cap inspection to ensure land use controls (LUCs) currently in place are effectively reducing potential exposure. SS010, SS002, and SS007 have NECs recorded at the sites documenting that cleanup have been performed to the maximum extent practicable even though residual fuel contaminated soil and/or solvent contaminated groundwater exists on site, however the 2021 sampling of SS007 is intended to demonstrate the site has reached UU/UE and can be closed without ICs. The report and RTC was approved on this date. Cascade Galasso-Irish
8/4/2021 Institutional Control Record Established Institutional Controls established and entered into the database. Cascade Galasso-Irish
8/24/2021 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 71076 DRO in soil and groundwater. Cascade Galasso-Irish
7/31/2023 Document, Report, or Work plan Review - other On this date, DEC reviewed and approved the Final 2022 Five-Year Review for Sites SS002, SS007, SS010, and WP003 at Driftwood Bay Radio Relay Station, Alaska. This is the 2nd FYR for SS002, SS007, and SS010, and the first FYR for WP003. During this FYR period, LF006 was closed without institutional controls and is no longer subject to FYRs. An Environmental Covenant or Notice of Activity and Use Limitations (NAUL) is required to be placed on the WP003 site to maintain the institutional controls (ICs) identified in the 2018 IC Plan, with a milestone date of this year (2023). The ICs will need to document restrictions to groundwater and soil use. Additionally, because none of the sites included in this FYR have an official Decision Document, DEC recommended a Decision Document(s) be drafted to document the official ICs and remedies in place at the four sites. Currently, ICs are functioning as intended and there is no current exposure. Cascade Galasso-Irish
9/18/2023 CERCLA PA On this date, DEC reviewed the Draft Preliminary Assessment Report for Aqueous Film Forming Foams (AFFF), Driftwood Bay Radio Relay Station, Alaska. The PA did not identify any AFFF sources (fire training areas or non fire training areas) at the Driftwood Bay RRS. Cascade Galasso-Irish
9/20/2023 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 71076 DRO in soil and groundwater. Cascade Galasso-Irish
9/22/2023 Cleanup Complete Determination Issued On this date, Cleanup Complete with Institutional Controls was approved for the site. Cascade Galasso-Irish
9/22/2023 Institutional Control Periodic Reporting Next periodic review is scheduled for 2028. Cascade Galasso-Irish
1/18/2024 Document, Report, or Work plan Review - other On this date, DEC received and approved the Final 2022 Land Use/Institutional Controls and Long-Term Management Report for the Former Driftwood Bay RRS Sites LF006, SS002, SS007, SS010, and WP003. Cascade Galasso-Irish

Contaminant Information

Name Level Description Media Comments
Benzo(a)pyrene < Method 2 Most Stringent Soil
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil 3,400 mg/kg in soil
DRO < Table C Groundwater One sampling event of concentrations below Table C, max concentration of 911 micrograms per Liter.

Control Type

Type Details
Notice of Environmental Contamination NEC recorded on 4/19/2018
Institutional Control Management Plan LUCs incorporated into the 611th Civil Engineering Squadron LUC Management Plan
Other Warning signs are present in accordance with the IC Plan that notify site visitors of the presence of onsite contaminants and provide contact information for IC management.

Requirements

Description Details
Groundwater Monitoring MNA will occur until the plume can be shown to be steady-state or decreasing.
Excavation / Soil Movement Restrictions Any work/dig permit must comply with Pacific Air Force (PACAF) Center OI 32-7001 Land Use Control Management Plan (2018 NEC).
Periodic Review Next periodic review is scheduled for 2028.

No associated sites were found.

Missing Location Data

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