Action Date |
Action |
Description |
DEC Staff |
7/27/1998 |
Update or Other Action |
Received Preliminary Assessment Records Review report and Draft Site Sampling Plan, both prepared by Hart Crowser, Inc. |
Scott Pexton |
8/12/1998 |
Site Characterization Workplan Approved |
Letter sent with approval of draft sampling plan. |
Scott Pexton |
9/14/1998 |
Update or Other Action |
Received Final Site Sampling Plan for Site Investigation, prepared by Hart Crowser, Inc. |
Scott Pexton |
1/25/1999 |
Update or Other Action |
Received Draft Site Investigation report, prepared by Hart Crowser, Inc. |
Scott Pexton |
8/20/1999 |
Update or Other Action |
Received Final Site Investigation report, prepared by Hart Crowser, Inc. |
Scott Pexton |
11/12/1999 |
Site Added to Database |
Petroleum product from a heating oil system. |
Scott Pexton |
11/18/1999 |
Site Ranked Using the AHRM |
Site ranked based on information in August 1999 Final Site Investigation report, prepared by Hart Crowser, Inc. |
Scott Pexton |
1/22/2004 |
Update or Other Action |
ADEC received draft Alternate Cleanup Level Demonstration Project workplan. |
Beatrice Egbejimba |
4/12/2004 |
Update or Other Action |
File number assigned: 2453.38.001. |
Sarah Cunningham |
1/6/2006 |
Update or Other Action |
Staff reviewed and prepared comments on an Alternative Cleanup Level Demonstration report. |
Debra Caillouet |
4/9/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Debra Caillouet |
4/15/2008 |
Site Characterization Report Approved |
Staff accepted the final Alternative Cleanup Level Demonstration report. |
Debra Caillouet |
12/3/2008 |
Document, Report, or Work plan Review - other |
Staff sent comment to the Guard on the draft Secondary Site Characterization Report. |
Debra Caillouet |
2/18/2009 |
Document, Report, or Work plan Review - other |
Final Secondary Site Characterization, Federal Scout Armory, Tununak. The report provides additional characterization of the contamination remaining at the Armory, but it does not define the extent.
When planning for a final remedial action at the Tununak FSA the lack of complete characterization of the nature and extent of the contamination must be addressed.
|
Debra Caillouet |
2/3/2010 |
Meeting or Teleconference Held |
Staff participated in the Installation Action Plan meeting. |
Debra Caillouet |
11/30/2010 |
Document, Report, or Work plan Review - other |
Staff reviewed and sent comment to the Alaska Army National Guard on the Draft Work Plan for Site Characterization at 21 Alaska Federal Scout Readiness Centers, November 2010, including the Site Specific Plans for Akiak, St. Mary’s and Tuntutuliak. |
Debra Caillouet |
2/25/2011 |
Document, Report, or Work plan Review - other |
Comment was sent on the Field Sampling Plans for Napakiak, Tununak, Mountain Village and Kipnuk, February 2011 |
Debra Caillouet |
5/23/2011 |
Site Characterization Workplan Approved |
Final Work Plan for Site Characterization at 21 Alaska Federal Scout Readiness Centers, April 2011 approved. |
Debra Caillouet |
6/14/2013 |
Document, Report, or Work plan Review - other |
Tununak Federal Scout Readiness Center Data Gap Investigation Report, Draft March 2013
In general the report provides additional characterization for the site.
Please review and revise Sections 5.2 and 5.3, the work plan called for the use of an excavator to collect a deep soil sample and this was based upon the fact that no samples deeper than 3 feet had been obtained due to the nature of the soil during previous investigations. Delineation of the vertical extent is a requirement for site characterization and was identified as a data gap.
|
Debra Caillouet |
7/16/2013 |
Site Characterization Report Approved |
Tununak Federal Scout Readiness Center Data Gap Investigation Report, Final June 2013
The report recommends no soil cleanup and long-term monitoring of the groundwater. Institutional Controls will need to be placed on the property to prevent use of the groundwater until it meets the cleanup standards. It is not clear in the report who owns the land. If this land is withdrawn for use by the Alaska Army National Guard a survey will need to be completed and filed at the Recorders Office noting the restrictions on groundwater use. If this property is owned by another entity, they will need to concur with the implementation of the IC’s. Please review the Guidance on Using Institutional Controls in Oil and Other Hazardous Substance Cleanups, February 2011 for further information before preparing a Record of Decision.
|
Debra Caillouet |
9/30/2013 |
Cleanup Level(s) Approved |
ROD |
Debra Caillouet |
2/2/2015 |
Document, Report, or Work plan Review - other |
Comment sent on the draft remedial action plan |
Debra Caillouet |
12/16/2015 |
Document, Report, or Work plan Review - other |
Rec'd 2 docs: Final long term monitoring (LTM) plan and LTM reports this date. |
Danielle Duncan |
12/17/2015 |
Update or Other Action |
Staff changed to Danielle Duncan and hard file transferred to the Juneau office. |
Kristin Thompson |
12/30/2015 |
Update or Other Action |
Read and provided minor comments on the Draft Tununak 2015 Long Term Monitoring Report this date. The site-specific cleanup levels for the site are 11,626 mg/kg DRO and 1.5 mg/L DRO. Historic soil sampling indicated that the soil on site already met the cleanup levels so no additional excavation was required. The current draft report documents the installation of three groundwater monitoring wells. One in the vicinity of the old aboveground storage tanks and two downgradient from them. These wells were sampled the first time as part of a five year groundwater monitoring plan to facilitate a cleanup complete without institutional controls determination. Monitoring wells 2 and 3 had DRO concentrations below the cleanup level and monitoring well 1 had DRO concentrations of 3.71 and 5.82 mg/L; one value is a duplicate. |
Danielle Duncan |
2/19/2016 |
Document, Report, or Work plan Review - other |
Rec'd Final Tununak 2015 Long-Term Monitoring Report this date. |
Danielle Duncan |
12/29/2016 |
Site Characterization Report Approved |
Approved the Draft Tununak 2016 Long Term Monitoring Report this date. The report documents the 2016 sampling of the three permanent monitoring wells (MW1, MW2, and MW3). MW1 had a DRO concentration of 4.63 mg/L and 4.69 mg/L (duplicate). The results for MW1 and MW2 were 0.416 and 0.269 mg/L respectively. These results are similar to the results for 2015 and indicate that MW1 still has DRO concentrations greater than the ADEC 18 AAC 75.345 Table C cleanup level of 1.5 mg/L. |
Danielle Duncan |
12/1/2017 |
Update or Other Action |
Will be receiving the draft LTM report soon. |
Danielle Duncan |
2/21/2018 |
Document, Report, or Work plan Review - other |
Approved the Draft Tununak 2017 Long Term Monitoring Report this date. The DRO results from the three monitoring wells in September 2017 were 4.1 and 4.3 mg/L (MW1 and its duplicate), 0.31 mg/L (MW2), and 0.41 mg/L (MW3). These results are similar to the results for 2015 and 2016 and indicate that MW1 still has DRO concentrations greater than the ADEC 18 AAC 75.345 Table C cleanup level of 1.5 mg/L. |
Danielle Duncan |
1/30/2019 |
Site Characterization Report Approved |
Approved the Draft Tununak 2018 Long Term Monitoring Report this date. The final report will be sent when it's available. During the current effort, two of the wells (MW-1 and MW-2) were sampled; MW-3 could not be located. MW-1 had a DRO concentration of 11 mg/L and MW-2 had a DRO concentration of 0.49 mg/L. The DRO concentration (11 mg/L) measured in MW-1 is significantly higher than previously measured. The observed upward tick in groundwater contamination in MW-1 may be affected by an adjacent/nearby site: ADEC file # 2453.38.002 Tununak TRC Store Diesel Tank Farm for which no characterization or cleanup work has been done to date and very little information exists for. The site is currently in delayed status because the ADEC has had difficulty contacting the responsible party. |
Danielle Duncan |
8/6/2019 |
Update or Other Action |
The AKARNG is requesting funds for a removal action. |
Danielle Duncan |
4/17/2020 |
Meeting or Teleconference Held |
On April 17, 2020 new ADEC PM and AKARNG PM held a meeting to discuss site status and plans for field season 2020 and future work. |
Rachael Petraeus |
9/15/2020 |
Document, Report, or Work plan Review - other |
On September 15, 2020 ADEC received "Draft Nunapitchuk 2020 Long Term Monitoring Work Plan Addendum Federal Scout Readiness Center Alaska Army National Guard" dated September 2020. The work plan summarizes proposed long term monitoring groundwater and surface water sampling. |
Rachael Petraeus |
12/8/2020 |
Document, Report, or Work plan Review - other |
On December 08, 2020 ADEC received an updated and revised workplan. The work plan addition requests for additional LTM for spring and fall 2021. |
Rachael Petraeus |
12/11/2020 |
Site Characterization Workplan Approved |
On December 11, 2020 ADEC approved the “Amended FINAL Tununak 2021 Long-Term Monitoring Work Plan Addendum Federal Scout Readiness Center Alaska Army National Guard” dated December 2020. The work plan includes additional sampling during the spring of 2021. |
Rachael Petraeus |
1/18/2023 |
Site Characterization Workplan Approved |
The ADEC approved the "Monitoring Well Replacement Work Plan, Tununak Federal Scout Readiness Center", dated November 22, 2022. The work plan proposes to decommission MW-3, which was found to be damaged in 2021. The well will be located, and the riser and screen will be removed if possible. If not, the well will be decommissioned in place. Th hole will be backfilled with bentonite and topped with gravel. The new monitoring well, MW-3A, will be located approximately 8 feet to the east of the former MW-3. The soil boring will be field screened using a PID, and two analytical samples will be collected and analyzed for DRO. The ADEC granted waiving the 24-hour waiting period for developing the wells due to the remoteness of the site.
The ADEC also requested a soil sample be taken in the vicinity of MW-1, as the drill will be located on site, and soil samples be tested for DRO, VOCs, and PAHs. |
Flannery Ballard |
2/1/2023 |
Long Term Monitoring Workplan or Report Review |
The ADEC received the "DRAFT Tununak 2021 and 2022 Long-Term Monitoring Report Federal Scout Readiness Center Alaska Army National Guard". Diesel range organics were found in MW-1 at a maximum concentration of 6,600 micrograms per liter (ug/L) in 2021 and a maximum of 2,000 ug/L in 2022, both exceeding the cleanup level of 1,500 ug/L. MW-2 was only sampled in 2021 (610 ug/L), as ice obstructed the monitoring well in 2022. MW-3 was found to be damaged beyond repair in 2021 and could not be located in 2022. The report is approved. |
Flannery Ballard |
5/15/2023 |
Long Term Monitoring Workplan or Report Review |
The DEC approved a work plan for a groundwater sampling event and advancement of one soil boring to address a data gap. Monitoring wells MW1, MW2, and MW3A will be sampled for DRO and VOCs. MW3A will be the replacement for MW3, and will be covered under an additional work plan. A single soil sample will be advanced adjacent to MW1, to a depth in which groundwater in encountered. Two analytical samples will be collected, one from the smear zone and one from the highest PID reading. Soil samples will be analysed for DRO, VOCs, and PAHs. |
Flannery Ballard |
5/17/2023 |
Long Term Monitoring Workplan or Report Review |
The ADEC approved the 2023 Draft Long term monitoring report. |
Flannery Ballard |
3/6/2024 |
Long Term Monitoring Workplan or Report Review |
ADEC received the Draft Tununak Fall 2023 Long-Term Monitoring Report 03.05.2024; ADEC comments sent on 04.08.2024; RTCs received 06.06.2024; ADEC RTCs sent 06.19.2024; RTCs received on 08.19.2024. Final ADEC comment table and report approval letter sent on 08.20.2024. |
Jenny Gates |
5/7/2024 |
Document, Report, or Work plan Review - other |
ADEC received the Draft Monitoring Well Replacement Technical Memorandum, Tununak FSRC on 03.05.2024; ADEC sent comments on 04.08.2024; RTCs received on 04.30.2024; ADEC RTCs sent on 05.06.2024; final report received 05.08.2024 and approval letter sent on 05.08.2024. |
Jenny Gates |
9/16/2024 |
Document, Report, or Work plan Review - other |
Draft Tununak 2024 Long-Term Monitoring Work Plan Addendum received on 08.23.2024. ADEC comments sent on 09.11.2024. AKARNG RTCs received on 09.18.2024; ADEC RTCs and approval letter issued on 09.19.2024. |
Jenny Gates |
9/26/2024 |
Offsite Soil or Groundwater Disposal Approved |
ADEC Contaminated Media Transport and Treatment or Disposal Approval Form received and approved 09.26.2024. |
Jenny Gates |