| Action Date |
Action |
Description |
DEC Staff |
| 4/15/1995 |
Preliminary Assessment Approved |
Based on FUDS Site Summary dated 2/21/96, PA completed 4/95. |
S&W-Miner |
| 2/19/1997 |
Site Added to Database |
Site added by Shannon and Wilson. |
S&W-Miner |
| 2/19/1997 |
Update or Other Action |
RD for Con/HTRW scheduled to start 10/97. |
S&W-Miner |
| 2/23/1998 |
Site Number Identifier Changed |
Changed workplan from X8 to X0 because it appears that the only issues at this site are LUST related. |
John Halverson |
| 12/1/1999 |
Update or Other Action |
ADEC reviewed and commented on a draft "Zone 17 C3 Site Visits Report" dated October 1999 (Jacobs Eng.). The report summarizes the site history, earlier investigations and a site visit and limited sampling in 1999. Prior investigations were done by the Corps of Engineers in 1993 and 1998. Four areas of potential contamination were documented in 1998:
Kitchen/Mess Hall UST - tank with ~2 feet of fuel and/or water;
Barracks area - elevated PAHs were found by a pipe in 1998, area not investigated in 1999;
Power House UST - soil samples collected by this rusted out tank did not contain petroleum hydrocarbons above cleanup levels.
Radar Van Shelters - up to 19,000 mg/kg DRO found in 1998 along with high PAHs. Samples collected in 1999 only contained up to 290 mg/kg DRO and low levels of PAHs.
The report recommends removal of ~31 cubic yards of DRO contaminated soil from the Radar Van Shelter area and removal of the UST from the kitchen/mess hall. |
John Halverson |
| 2/24/2000 |
Site Ranked Using the AHRM |
Based on existing information the site ranks as a low priority. |
John Halverson |
| 12/21/2000 |
Site Ranked Using the AHRM |
Site reranked as a low priority. |
John Halverson |
| 7/23/2001 |
Update or Other Action |
EPA completed a PA/SI on the site and determined that no further action is required under CERCLA. |
John Halverson |
| 6/14/2005 |
Update or Other Action |
File number issued 2657.38.001. |
Aggie Blandford |
| 5/29/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Jill Taylor |
| 10/7/2015 |
Update or Other Action |
Corrected the site coordinates to the center of the formerly used defense site rather than the center of the island. |
John Halverson |
| 12/1/2016 |
Meeting or Teleconference Held |
CS managers participate in the annual FUDS site management action plan meeting. The purpose of the is to collaborate with FUDS management on site progress and prioritization for all of the formerly used defense sites. FUDS prioritization is based on risk, congressional interest, state input and proximity to other sites on the prioritization list. FUDS has increased environmental restoration funding in Alaska for the 2017 and 2018 field seasons to meet National goals for site progress. |
Darren Mulkey |
| 4/10/2017 |
Meeting or Teleconference Held |
A meeting with the RP to discuss FY17 field work. |
Jessica Morris |
| 12/5/2017 |
Site Characterization Workplan Approved |
The ADEC Contaminated Site Program approved the Final Tigalda/Unalga Site Visit Work Plan. |
Jessica Morris |
| 3/21/2018 |
Document, Report, or Work plan Review - other |
The ADEC Contaminated Sites Program submitted comments on the Draft Tigalda Site Visit Report, FUDS Tigalda Island, Alaska. |
Jessica Morris |
| 7/5/2018 |
Meeting or Teleconference Held |
A project team meeting was held to resolve comments on the Draft Tigalda Site Visit Report and the Tigalda Removal Action/Remedial Investigation Work Plan for the Tigalda Island FUDS. Representatives from ADEC, U.S. Army Corps of Engineers FUDS Program, USFWS, Kaktovik Environmental, EA Engineering participated in the meeting. |
Jessica Morris |
| 7/26/2018 |
Document, Report, or Work plan Review - other |
The ADEC Contaminated Sites Program accepted the responses to comments on the Draft Tigalda Site Visit Report, FUDS Tigalda Island, Alaska. However, the Corps of Engineers made the decision not incorporate the responses and finalize the Site Visit Report. The Site Visit Report was not approved by ADEC; however ADEC's comments were incorporated into the Removal Action Work Plan. |
Jessica Morris |
| 7/27/2018 |
Cleanup Plan Approved |
The ADEC Contaminated Site Program approved the Final Tigalda Removal Action/Remedial Investigation Work Plan for implementation in the field. However, some of ADEC's concerns with the characterization and clean up of the site remain unresolved and will be addressed in subsequent stages of the project.
|
Jessica Morris |
| 8/15/2018 |
Site Visit |
ADEC Contaminated Sites Program staff conducted a site visit at the Tigalda Island FUDS to oversee the removal action activities. |
Jessica Morris |
| 7/8/2019 |
Update or Other Action |
Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map. |
Rebekah Reams |
| 8/5/2021 |
Update or Other Action |
On July 29, 2021 ADEC approved the Final Work Plan, CON/HTRW Removal Action, FUDS (F10AK037601)for Tigalda Island Army Aircraft Warning Station in Alaska, dated July 2021.
The work plan goals for this removal action project are to delineate, remove, transport, and dispose of up to 100 tons of petroleum, oil, and lubricants (POL)-contaminated soil; locate, field screen, and collect analytical samples along a former pipeline in the vicinity of the Radar Van Shelter; and to decommission, remove, and dispose of piezometer RVS-PZ-02 and dispose of piezometer KM-PZ-02. |
Daniela Fawcett |
| 6/20/2022 |
Document, Report, or Work plan Review - other |
On 6/20/2022 ADEC reviewed the DRAFT Report CON/HTRW, Tigalda Island Army Aircraft Warning Station, Alaska.
The goal of the removal action project was to facilitate site closure by removing potential threats to human health and the environment posed by contaminated soil. In order to achieve the project goal, the following objectives were established in the DEC approved FINAL Work Plan CON/HTRW Removal Action Formerly Used Defense Site (F10AK037601) Tigalda Island Army Aircraft Warning Station, Alaska (dated July 2021) and accomplished during the field effort:
• Delineated, removed, transported, and disposed of petroleum, oil, and lubricants (POL) -contaminated soil,
• Located, field screened, and collected analytical samples along a former pipeline in the vicinity of the Radar Van Shelter, and
• Decommissioned, removed, and disposed of piezometers (RVS-PZ-02 KM-PZ-02).
|
Daniela Fawcett |
| 7/27/2022 |
Update or Other Action |
on 7/26/2022 ADEC received DECLARATION OF PROJECT CLOSEOUT DECISION For CON/HTRW Project F10AK0376-01 Tigalda Island Army Aircraft Warning Station Tigalda Island, Alaska for review.
The CON/HTRW Project F10AK0376-01 has been recommended for site closeout by the United States Army Corps of Engineers (USACE), Alaska District due to the removal of eligible CON/HTRW through two separate cleanup actions. The cleanup actions at the site included the removal, transportation, and disposal of CON/HTRW and a limited quantity of grossly contaminated soil. This Project Closeout Report is issued by USACE pursuant to ER 200-3-1, paragraph 4-7.4.1.1.
|
Daniela Fawcett |
| 9/30/2022 |
Document, Report, or Work plan Review - other |
on 9/30/2022 ADEC Approved the ADEC approval for the FINAl Report, CON/HTRW Removal Action, FUDS (F10AK037601), Tigalda Island Army Aircraft Warning Station, Alaska Dated August 2022.
The objectives of the project were to delineate, remove, transport, and dispose of up to 100 tons of petroleum, oil, and lubricants (POL)-contaminated soil, to locate, field screen, and collect analytical samples along a former pipeline in the vicinity of the Radar Van Shelter, and to decommission, remove, and dispose of piezometer RVS-PZ-02 and dispose of piezometer KM-PZ-02. |
Daniela Fawcett |
| 12/27/2022 |
Cleanup Complete Determination Issued |
On 12/27/2022 The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with the Tigalda Island, Alaska. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required unless information becomes available that indicates residual contaminants may pose an unacceptable risk. |
Daniela Fawcett |
