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 site sampling plan. |
Scott Pexton |
9/14/1998 |
Site Ranked Using the AHRM |
Received Final Site Sampling Plan, prepared by Hart Crowser, Inc. |
Scott Pexton |
12/28/1998 |
Update or Other Action |
Received Draft Site Investigation report, prepared by Hart Crowser, Inc. |
Scott Pexton |
6/16/1999 |
Update or Other Action |
Letter sent with comments on draft site investigation report. |
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 heating oil system. |
Scott Pexton |
11/23/1999 |
Site Ranked Using the AHRM |
Site ranked based on information in the August 1999 Final Site Investigation report, prepared by Hart Crowser, Inc. |
Scott Pexton |
2/27/2002 |
Update or Other Action |
Received "Corrective Action Plan" prepared by Clearwater Environmental, Inc. The plan describes a proposed interim removal action to excavate up to 15 cubic yards of petroleum-contaminated soil to reduce potential exposure to grossly contaminated soil. The plan proposes method one cleanup levels for petroleum hydrocarbons excavated during the interim action, based on Table A1 of 18 AAC 75.341 (Category D cleanup levels proposed are 1,000 mg/kg for GRO, 2,000 mg/kg for DRO, and 2,000 mg/kg for RRO). BTEX concentrations are to be compared to method two, Table B1 Migration to Groundwater cleanup levels. Excavated soil to be transported to a thermal desorption treatment facility located in Lakewood, Washington. |
Scott Pexton |
4/10/2002 |
Update or Other Action |
Received Final Interim Removal Action Plan prepared by Clearwater Environment, Inc. |
Scott Pexton |
4/15/2002 |
Site Characterization Report Approved |
Sent letter to Norm Straub of the Alaska Army National Guard with approval of the 1999 Final Site Investigation report prepared by ERM West, Inc./Hart Crowser, Inc. with conditions: (1) based on the information provided, ADEC does not approve the proposed alternative cleanup levels of 10,250 mg/kg for DRO, 1,400 mg/kg for gasoline range organics (GRO), 4.6 mg/kg for benzene, 2,770 mg/kg for toluene, 3,847 mg/kg for ethylbenzene, and 54,942 mg/kg for total xylenes; and,
(2) soil cleanup levels provided under method one and method two apply at a contaminated site unless the department approves an alternative cleanup level that the responsible person has proposed under method three or method four (18 AAC 75.340 (d)). Letter also provided specific comments on the interim removal action plan provided by Clearwater Environmental, Inc. |
Scott Pexton |
5/3/2002 |
Update or Other Action |
Received Email message from Norm Straub of AKARNG with attached Addendum for the Final Interim Removal Action Plan. |
Scott Pexton |
5/15/2002 |
Interim Removal Action Approved |
Letter sent to Norm Straub of AKARNG with approval of interim removal action plan (with addendum) prepared by Clearwater The plan describes procedures to conduct an interim removal action in accordance with 18 AAC 75.330. ADEC determined that the proposed interim removal action will reduce human and environmental exposure to hazardous substances at the site and help to prevent the migration of hazardous substances from the site to groundwater and surface water. Up to fifteen cubic yards of petroleum-contaminated soil will be excavated and placed in 55-gallon steel drums or 1-cubic yard Supersacks for temporary storage onsite in an area lined with 10-mill polyethylene plastic. The drums or Supersacks will also be covered with a 6-mill polyethylene plastic cover. The contractor intends to transport the contaminated soil via barge to Seattle, Washington and then via highway to a thermal desorption treatment facility located in Lakewood, Washington. Prior to transporting the contaminated soil from the Mountain Village Federal Scout Armory site, the Alaska Army National Guard contractor will obtain written ADEC approval to move the soil in accordance with 18 AAC 75.370 (b). |
Scott Pexton |
5/15/2002 |
Record of Decision |
Approved Soil Cleanup Levels: Benzene = 0.02 mg/kg and DRO = 200 mg/kg using method one, Table A1 and Table B1 at 18 AAC 75.341. Approximately 15 cubic yards of petroleum-contaminated soil will be excavated in accordance with an approved interim removal action plan. |
Scott Pexton |
7/1/2002 |
Update or Other Action |
ADEC approved transport and temporal storage of contaminated soil in ALakanuk until Northland can backhaul to Seattle. |
Beatrice Egbejimba |
7/10/2002 |
Update or Other Action |
Received faxed documentation from Norm Straub of the Alaska Army National Guard regarding TPS Technologies Inc., a soil treatment facility in the State of Washington, including a cop0y of the operating permit, and a letter indicating acceptance of soils from seven AKARNG facilities. |
Scott Pexton |
4/8/2004 |
Update or Other Action |
File number assigned: 2430.38.001. |
Sarah Cunningham |
6/2/2004 |
Update or Other Action |
ADEC received draft Alternate Cleanup Level Demonstration Project. |
Beatrice Egbejimba |
6/16/2004 |
Update or Other Action |
AKARNG Alakanuk FSA |
Beatrice Egbejimba |
2/4/2005 |
Update or Other Action |
SStaff reviewed the July 2004 final workplan that was recieved Oct 04 for the Alternate Cleanup Level Project. The work plan in general meets requirements. |
Debra Caillouet |
2/18/2005 |
Update or Other Action |
A letter was sent to the AKANG providing conditional approval of the workplan. |
Debra Caillouet |
6/2/2005 |
Update or Other Action |
Staff reviewed the Installation Action Plan and submitted the following comment. The IAP fairly presents the results of a Site Investigation (SI) in 1998. The soil around the old above ground storage tank (AST) contained diesel range organics (DRO) up to 59,000 mg/kg. Soil near the new AST contained up to 10,000 mg/kg DRO. The SI estimated 70-90 cubic yards of soil contaminated above a proposed action level of 10.250 mg/kg were at the site.
An Interim Removal Action (IRA) in 2002 removed and treated off-site, 15 cubic yards of DRO contaminated soil near the old AST. Confirmation samples from the excavation sidewalls contained DRO remaining up to 23,600 mg/kg and benzene at 0.171 mg/kg in one sample. The Alaska Department of Environmental Conservation (DEC) has a copy of the draft IRA report but does not have a copy of the final. Please send me a copy of the final IRA report.
In the section of the IAP describing the IRA, Hooper Bay is erroneously mentioned, this should be corrected in the final IAP.
An Alternative Cleanup Level (ACL) Demonstration is currently pending for the site.
The discussion of the cleanup strategy states that a remedial investigation is needed to define the site conditions (geology, permafrost, conceptual site model, etc.), and to delineate the extent of DRO contamination and confirm the extent of groundwater impacts. This information will be needed, along with the total organic carbon information obtained during the ACL demonstration project before DEC will be able to evaluate an ACL for the site.
When the alternative cleanup level demonstration results are available, DEC would like to work with the AKARNG to scope the remedial investigation and determine the best course of action for the site. |
Debra Caillouet |
9/1/2005 |
Interim Removal Action Approved |
The Interim Removal Action report for the Alaska Army National Guard site in Mountain Village was approved by staff. It documents that 17.6 tons of petroleum contaminated soil were removed and treated at TPS Technologies in Washington. Diesel range organics (DRO) were found up to 23,600 mg/kg remaining in the western sidewall of the excavation near the existing aboveground storage tank.
Because residual petroleum contamination in soil, for six of six confirmation samples, exceeds 18 AAC 75.341 Table B1 migration to groundwater cleanup levels, additional site characterization and/or cleanup are necessary. |
Debra Caillouet |
9/26/2005 |
Update or Other Action |
Staff drafted a comment letter on the draft ACL Demonstration report. |
Debra Caillouet |
5/10/2006 |
Site Characterization Report Approved |
The Final Alternative Cleanup Level Demonstration Report for Mountain Village Federal Scout Armory (FSA) Contaminated Site was approved. |
Debra Caillouet |
5/18/2006 |
Cleanup Level(s) Approved |
The cleanup levels proposed are based on a site specific total organic carbon content in the soil of 0.7 percent rather than the default 0.1 percent. This results in the gasoline range organics (GRO) soil cleanup level being capped at the maximum allowable level of 1400 mg/kg. This cleanup level and other petroleum range and constituent cleanup levels, which are based on the migration to groundwater pathway, are shown in the table below.
Contaminant of Concern Alternative Soil Cleanup Level
Gasoline Range Organics 1400 mg/Kg
Diesel Range Organics 1800 mg/Kg
Benzene 0.0421 mg/Kg
Toluene 19.9 mg/Kg
Ethylbenzene 25.8 mg/Kg
Xylenes 367 mg/Kg
DEC approves these alternative cleanup levels for the site identified in the Mountain Village FSA report reference above. Please note that the use of these cleanup levels will require establishment of institutional controls to document the location of soil with residual contamination above the method two levels and that in accordance with 18 AAC 75.325(i)DEC approval is required prior to transporting such soil off-site. |
Debra Caillouet |
4/1/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
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 |
8/8/2013 |
Site Characterization Report Approved |
Mountain Village Federal Scout Readiness Center Data Gap Investigation Report, Final June 2013
The report recommends cleanup levels of 1,400 mg/kg for GRO, 11,212 mg/kg for DRO, and 0.171 mg/kg for benzene based on the default aromatic and aliphatic cleanup levels from 18 AAC 75.34 Table B2 for the ingestion and inhalation pathways. The GRO is capped at the maximum allowable. ADEC has no objection to the use of these cleanup levels. Confirmation sampling will be necessary to show all levels, (total DRO by AK102, DRO Aromatic, DRO Aliphatic, total GRO by AK101, GRO Aromatic, GRO Aliphatic and benzene) are met.
|
Debra Caillouet |
10/22/2013 |
Cleanup Level(s) Approved |
ROD approved |
Debra Caillouet |
2/24/2015 |
Document, Report, or Work plan Review - other |
Draft Mountain Village Remedial Action Plan, Federal Scout Readiness Center, February 12, 2015 |
Debra Caillouet |
7/24/2015 |
Cleanup Plan Approved |
Final Mountain Village Remedial Action Plan, Federal Scout Readiness Center, July 14, 2015 |
Debra Caillouet |
12/23/2015 |
Update or Other Action |
Remediation will occur this summer. Work plan has already been approved. There is no groundwater contamination. |
Danielle Duncan |
2/7/2017 |
Document, Report, or Work plan Review - other |
Provided comments on the draft remedial action report this date. |
Danielle Duncan |
2/22/2018 |
Update or Other Action |
Reviewed and accepted the responses to my comments on the draft remedial action report this date. |
Danielle Duncan |
4/11/2018 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 74039 Spills/Leaks. |
Danielle Duncan |
4/20/2018 |
Document, Report, or Work plan Review - other |
The ADEC has received and reviewed the Final Remedial Action Report this date. A total of 573 cubic yards of petroleum contaminated soil from the 4 excavations was transported to and disposed of at Waste Management in Arlington, Oregon. The site now meets the site-specific cleanup levels and will be evaluated for closure. |
Danielle Duncan |
4/23/2018 |
Cleanup Complete Determination Issued |
|
Danielle Duncan |