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Site Report: AKARNG Akiak FSA


Site Name: AKARNG Akiak FSA
Address: Mukluk Street, USS 2243, Akiak, AK 99552
File Number: 2402.38.002
Hazard ID: 2456
Status: Active
Staff: Danielle Duncan, 9074655207 danielle.duncan@alaska.gov
Latitude: 60.912128
Longitude: -161.217485
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

The 2013 investigation defined the areas of the site with soil contamination from diesel range organics (DRO) and gasoline range organics (GRO) remaining. Groundwater has been impacted with DRO and benzene above cleanup levels. A Record of Decision (ROD) for the Akiak FSRC was approved by ADEC in 2013. The ADEC-approved site-specific cleanup levels for soil listed in the ROD were 11,555 mg/kg for total DRO, 1,400 for total GRO, and 0.06 mg/kg for benzene. Cleanup levels for groundwater were 1.5 mg/L for DRO and 0.005 mg/L for benzene. In June 2015, a total of 132 yds3 of soil with DRO, GRO, and benzene concentrations greater than the ADEC-approved site-specific cleanup levels was removed from the Akiak FSRC. Analytical results for confirmation samples collected at the final excavation limits indicated that all soil with DRO, GRO, and benzene concentrations greater than the ADEC-approved site-specific cleanup levels was removed. The site is now under a long-term groundwater monitoring plan.

Action Information

Action Date Action Description DEC Staff
5/7/1981 Site Added to Database Fuel oil contaminant. No Longer Assigned
8/9/1991 Site Number Identifier Changed Old# 81220912702 New# 8125X912702 Western district, regular CS now. Bill Petrik
6/15/1995 Site Ranked Using the AHRM Initial ranking. Action code added because it wasn't when site was originally ranked. Too many unknowns, score is 0. John Halverson
2/22/1996 Site Ranked Using the AHRM Site ranked. Bill Wright
2/23/1996 Preliminary Assessment Approved (Old R:Base Action Code = SA1A - Phase I Site Assessment Approval). Phase 1 site assessment report reviewed and approved. Bill Wright
3/27/1996 Update or Other Action Letter sent with request for additional characterization of extent of contamination. Bill Wright
7/31/1996 Site Number Identifier Changed Combined Reckey 198125X912702 into this Reckey. Bill Petrik
9/9/1997 Site Ranked Using the AHRM Site reranked. Changed Population Density Value from 3 to 5; GW Usage Value from 0.1 to 0.8; GW Exposure Index Value from 0.4 to 1; SW Usage Value from 0.5 to 1; and SW Environments from 0 to 2. Former score was 8. Scott Pexton
9/15/1998 Site Characterization Workplan Approved Letter sent with approval of Final Site Sampling Plan for Remedial Investigation prepared by CH2MHILL. Scott Pexton
1/8/1999 Update or Other Action Draft Remedial Investigation Report received. Prepared by CH2MHILL. Scott Pexton
3/11/1999 Update or Other Action Letter sent with comments on draft Remedial Investigation Report. Scott Pexton
6/23/1999 Update or Other Action Received Final Remedial Investigation Report (dated May 1999), prepared by CH2MHILL. Scott Pexton
10/11/1999 Site Ranked Using the AHRM Site reranked based on May 1999 Akiak Remedial Investigation Report prepared by CH2MHILL. Scott Pexton
3/12/2004 Update or Other Action File number assigned: 2402.38.002. Sarah Cunningham
6/2/2004 Update or Other Action ADEC received Final Interim Removal Action Plan. Beatrice Egbejimba
7/2/2004 Update or Other Action DEC issued a letter stating the following: DEC has completed review of the document titled: Final Interim Removal Action Plan, Federal Scout Armory, Akiak, Alaska dated March 2004 and offers the following comments. DEC concurs with the general approach of the plan however, can not provide approval to the plan as written. The plan provides a general approach for the excavation, and handling of impacted petroleum contaminated soil but lacks site specific detail for DEC approval under 18 AAC 75. DEC understands that the AKARNG is performing this action to reduce risk to human health and the environment under 18 AAC 75.330, to provide for a partial cleanup at the site and not achieve cleanup levels. It is presumed that information gathered during this interim action will provide data to be used in determining any future actions required for site clean up. In conclusion, DEC has no objection to the interim removal approach provided and will defer any further regulatory decisions until review of the data collected from the site work. David Pikul
3/15/2005 Update or Other Action Legal description added per 5/1999 RI Debra Caillouet
3/16/2005 Update or Other Action Staff reviewed the Akiak Federal Scout Amory Installation Action Plan. The plan contains a summary of the actions to date and proposed cleanup strategy. The summary of the actions fairly depicts the results of the site investigation, but the removal action report documenting work conducted last year has not been received yet, little information on the removal action that occurred last year is described in the IAP. DEC will need to review the removal action report prior to concurring with a clean up strategy. If you could identify when the current structure will be removed that would help to understand the overall time period to complete cleanup. Debra Caillouet
3/13/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Debra Caillouet
6/25/2008 Update or Other Action Staff provided comment on the draft characteriation/delineation work plan Debra Caillouet
8/13/2008 Update or Other Action Staff reviewed the site characterization work plan and provided comment to the AKARNG. Debra Caillouet
12/4/2008 Report or Workplan Review - Other The Secondary Site Characterization report was reviewed and comments sent to the Guard. Debra Caillouet
2/19/2009 Report or Workplan Review - Other Final Secondary Site Characterization, Federal Scout Armory, Akiak. The report provides additional characterization of the nature and extent of the contamination remaining at the Armory. It generally meets the requirements of 18 AAC 75 although a qualifed person did not perform the sampling. Debra Caillouet
2/3/2010 Meeting or Teleconference Held Staff participated in the Installation Action Plan meeting. Debra Caillouet
11/30/2010 Report or Workplan 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
1/26/2011 Site Characterization Workplan Approved Final Work Plan for Site Characterization at 21 Alaska Federal Scout Readiness Centers, January 2011 and the Site Specific Plans for Akiak, St. Mary’s and Tuntutuliak. 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
2/24/2012 Report or Workplan Review - Other Comment sent on the draft data gap investigation report. Debra Caillouet
2/4/2013 Site Characterization Report Approved Akiak Federal Scout Readiness Center, Data Gap Investigation Report, January 2013 The investigation defined the areas of the site with soil contamination from diesel range organics (DRO) and gasoline range organics (GRO) remaining. Groundwater has been impacted with DRO and benzene above cleanup levels. The hydrocarbon risk calculator was used to calculate proposed alternative cleanup levels of 11,555 mg/kg DRO, 1400mg/kg GRO, and 0.06 mg/kg benzene. ADEC has no objection to the use of these soil cleanup levels. Groundwater monitoring is recommended in the report and ADEC concurs. Debra Caillouet
6/10/2013 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 73433 AST. Debra Caillouet
10/28/2013 Cleanup Level(s) Approved Record of Decision Debra Caillouet
1/9/2015 Cleanup Plan Approved Draft Akiak Remedial Action Plan, Federal Scout Readiness Center, December 18, 2014 Debra Caillouet
2/24/2015 Cleanup Plan Approved Final Akiak Remedial Action Plan, Federal Scout Readiness Center, February 12, 2015 - approved and letter sent. Debra Caillouet
12/16/2015 Report or Workplan Review - Other Rec'd draft Akiak Remedial Action Report 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 Brown
1/13/2016 Report or Workplan Review - Other Sent approval letter for the Draft Akiak Remedial Action Report. A total of 132 yd3 of petroleum contaminated soil was removed from the site. The FSRC was moved to access contaminated soil underneath the building; it was replaced post-excavation. Field screening and confirmation analytical samples indicate that the remaining contamination is at levels below cleanup levels. No groundwater samples were collected on either attempts due to lack of groundwater. I have reviewed the draft report and have no comments. Danielle Duncan
2/29/2016 Long Term Monitoring Established Rec'd the Final Akiak Remedial Action Report this date. The first of the 5 year groundwater monitoring/sampling was not completed due to lack of groundwater. Sent approval letter. Danielle Duncan
4/27/2017 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 73433 AST. Danielle Duncan
8/30/2017 Update or Other Action Rec'd a letter requesting a Cleanup Complete Determination due to a data transcription error. After researching the groundwater value in question using the original data sheets, it was determined that the high level of DRO (27 mg/L) was detected in the past and was not actually 0.027 mg/L. I relayed this information to the AKARNG via telephone and sent the corresponding laboratory data. The plan now is to see if groundwater can be found - it has been of low volume or non-existent in the past. Danielle Duncan
10/4/2017 Update or Other Action Groundwater wells were dry the week of Sept. 5-7. Danielle Duncan
10/6/2017 Update or Other Action Reviewed the groundwater well log and notes provided by the AKARNG - some data indicates frozen soil, other data says no frozen soil. Their contractor is going to try and sample the wells again. Danielle Duncan
10/24/2017 Update or Other Action The contractor tried to send a team to Akiak last week, but they got weathered in in Bethel for two days. The contractor will try again next year. Danielle Duncan

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

Missing Location Data

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