| Action Date |
Action |
Description |
DEC Staff |
| 10/27/2014 |
Document, Report, or Work plan Review - other |
DEC review of April 2013 PASI for sites CS544 and OT617. DEC did not believe the effort was sufficient to determine the absence or presence of contamination with any certainty. |
John Carnahan |
| 7/22/2015 |
Document, Report, or Work plan Review - other |
Approved Final Work Plan for Site Characterization Investigations for Multiple Sites including Cape Lisburne. Work at Cape Lisburne includes soil sampling at CS544, the fueling station adjacent to Building 515 (the former power plant) and site OT617, the former underground storage tank at the water pump house. |
John Carnahan |
| 5/5/2017 |
Document, Report, or Work plan Review - other |
DEC provides review responses to Draft RI. Trichloroethene (TCE) and several metals were the only site contaminants that exceeded DEC Arctic Zone cleanup levels. In general, the report made several conclusions based on the derived data and an accompanying risk evaluation. It should be noted that the investigation was proposed as a ‘Supplemental Site Inspection’ (SSI). The initial Site Inspection was determined insufficient in magnitude to make the assertion that no further action was required. This SSI investigation was meant to more adequately investigate areas likely to have been impacted to determine absence or presence of contamination. The SSI
also was stated to have the objective of delineating the nature and extent of site contamination. Although the effort identified TCE, delineation was limited to predetermined locations, limiting understanding of actual extent to available sample results. It is difficult to accurately delineate without first clearly knowing of the presence, and then initiating a robust assessment from that point. |
John Carnahan |
| 7/17/2017 |
CERCLA RI Report Approved |
Provided letter regarding final submittal. DEC provided significant comments regarding the limitations of the RI during draft review. Consultant indicated that the RI met their objectives to determine the presence of contamination and bound it with borings. Detailed evaluation of extent not provided. Further investigation action anticipated. |
John Carnahan |
| 10/11/2017 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 2/21/2018 |
CERCLA FS |
DEC provided comments on Draft FS. The FS evaluated four options. DEC uncertain that sufficient site-specific information regarding the targeted chemicals is available to render a reasonable assessment of options. DEC does not believe that monitored natural attenuation is likely feasible, nor capable of being monitored adequately. Recommends further assessment to better determine the extent of any onsite impacts, and reevaluation of remedial alternatives. |
John Carnahan |
| 11/20/2018 |
CERCLA Proposed Plan |
Provide acceptance to the response to comments which were incorporated into Draft Final Proposed Plan for Site CS544 – Trichloroethylene Spill Area near Service Building 151, Cape Lisburne LRRS, Alaska, 19 November 2018. The preferred alternative relies on the use of Land Use Controls to manage the risk of exposure indefinitely, or until such time that cleanup levels are attained and confirmed with future assessment. |
John Carnahan |
| 12/20/2018 |
Update or Other Action |
Receive Draft Record of Decision to document requirements for IC management as selected remedy. |
John Carnahan |
| 2/7/2019 |
Update or Other Action |
DEC provides comments on ROD to USAF. |
John Carnahan |
| 6/10/2019 |
CERCLA ROD Approved |
DEC approved and signed the "U.S. Air Force Cape Lisburne Long Range Radar Site, ALaska, Final, Record of Decision for Site CS544, Trichloroethylene Spill Area Near Service Building 151 at Cape Lisburne Long Range Radar Site" dated April 2019. |
Melinda Brunner |
| 5/4/2021 |
Document, Report, or Work plan Review - other |
Completed review of the 2020 Remedial Action Operations, Land Use/Institutional Control Report for Cape Lisburne LRRS sites CS544 and LF001. Report detailed IC and landfill cap inspections for CS544 and LF001. The gravel cap at CS544 remains in good condition. Two new warning signs were installed at CS544. Landfill cap liner at LF001 noted to be in overall good condition with some areas minimally exposed. Report is approved. |
Kelly Walker |
| 5/3/2022 |
Document, Report, or Work plan Review - other |
Review completed of 2021 LTM Report for Cape Lisburne LRRS Sites CS544 and LF001. Report details the annual institutional control/land use control inspection activities for CS544 and LF001. Exposed liner was observed at both CS544 and LF001. Signage was noted to be generally good condition across both sites. No maintenance was performed during this field effort. |
Kelly Walker |
| 9/22/2022 |
Long Term Monitoring Workplan or Report Review |
2021 Long-Term Management Report for Cape Lisburne LRRS Sites CS544 and LF001 approved. Report detailed 2021 annual inspection of the institutional control/land use controls at CS544 and LF001. |
Kelly Walker |
| 7/26/2023 |
Site Characterization Workplan Approved |
DEC reviewed and approved the Uniform Federal Policy-Quality Assurance Project Plan (UFP-QAPP), for Cape Lisburne Sites CS544 and LF001. This document details the updated project plan for the long-term monitoring and management of institutional controls (ICs) in place at CS544 and LF001. In addition to annual site visits to observe and inspect the status of ICs, up to four active zone water monitoring points will be installed and sampled during the 2023 field season. This sampling is intended to fulfill the active zone water monitoring requirements set forth in the 2014 Record of Decision for LF001. |
Kelly Walker |
| 10/12/2023 |
CERCLA ROD Periodic Review |
DEC completed review of the 2023 Five-Year Review for Sites LF001 and CS544. This is the third five-year review for LF001 and the first five-year review for CS544. The purpose of this review is to evaluate the implementation and performance of the selected remedies for LF001 and CS544 and to determine if each selected remedy is functioning and remains protective of human health and the environment. For LF001, the remedy was found to be short-term protective due to exposed liner, scattered metal debris and ponding on the landfill cap. Cap maintenance and active zone water monitoring is required in order to maintain the selected remedy at LF001. The protectiveness determination was found to be short term protective for CS544. For the remedy to be fully functioning, a NAUL must be filed. |
Kelly Walker |
| 9/26/2024 |
Long Term Monitoring Workplan or Report Review |
DEC reviewed and approved the "2023 Long-Term Management Report" for Cape Lisburne LRRS sites CS544 and LF001. This report detailed the 2023 inspection activities of the institutional control/land use controls (IC/LUC) in place at CS544 and LF001. In addition to the annual long-term management inspection, three active zone water samples were collected downgradient of LF001. Inspection results indicate site conditions at CS544 and LF001 are largely unchanged. Results from the active zone water sampling indicate trichloroethene (TCE) is present above DEC Table C Groundwater Cleanup Levels. These results indicate possible transport of contaminants outside the landfill margins. |
Kelly Walker |
| 9/26/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved the "Landfill Cap Repair Assessment Technical Memorandum" for the Cape Lisburne LRRS sites. This document details the inspection of the LF001 landfill cap and the soil cover at CS544. This memo also documents the cap and cover condition and depth of the LF001 cap. Visual inspection of the LF001 cap indicated it was in moderate condition with varying degrees of revegetation occurring. The depth evaluation of LF001 indicated the majority of the cap is less than 2 feet thick. Additional maintenance of the LF001 cap is recommended. Condition of the soil cover at CS544 was noted to be in general good condition and no maintenance was recommended. |
Kelly Walker |
| 3/24/2025 |
Long Term Monitoring Workplan or Report Review |
DEC reviewed and approved the "2024 Long-Term Management Report" for the Cape Lisburne LRRS sites CS544 and LF001. This report details the annual inspection of institutional control (IC)/land use controls (LUC) in place at CS544 and LF001 and the active zone water sampling conducted at LF001. One of the IC signs at CS544 was observed to be destroyed and will require replacement. Four active zone water samples were collected at LF001 and analyzed for DRO, RRO, TCE, carbon tetrachloride and benzene. All analytical results were less than DEC Table C Groundwater Cleanup Levels. |
Kelly Walker |
| 8/27/2025 |
Meeting or Teleconference Held |
DEC staff virtually attended the 2025 Fall Barrow RAB meeting. This meeting was held in Utqiagvik at the Top of the World Hotel. USAF and US Navy personnel presented project updates for the following contaminated sites and former installations: Barter Island LRRS, Bullen Point SRRS, Oliktok LRRS, Pt. Barrow LRRS, NARL, Pt. McIntyre, Icy Cape, Point Lay LRRS, and Cape Lisburne LRRS. In attendance were members of the community, various state and federal agencies, and regional corporations. Upon finalization, meeting minutes will be available for public review. |
Kelly Walker |
| 1/15/2026 |
Long Term Monitoring Workplan or Report Review |
DEC reviewed and approved the '2025 Long-Term Management Report' for the Cape Lisburne LRRS sites CS544 and LF001. This report detailed the annual inspection of institutional control (IC)/land use controls (LUC) in place at CS544 and LF001 and the active zone water sampling at LF001. The results of active zone water sampling at LF001 indicate that concentrations of DRO, RRO, TCE and carbon tetrachloride remain below DEC Table C Groundwater Cleanup Levels. Based on the results of the last two consecutive active zone water sampling events at LF001, DEC concurs that active zone water sampling is no longer needed, per the selected remedy in the LF001 ROD. |
Kelly Walker |
