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Site Report: AKARNG Shungnak FSA

Site Name: AKARNG Shungnak FSA
Address: Unnamed Road, Shungnak, AK 99773
File Number: 490.38.004
Hazard ID: 3098
Status: Cleanup Complete
Staff: ,
Latitude: 66.887692
Longitude: -157.138466
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.


Petroleum contamination in soil. DRO reported in surface soil at concentrations ranging from 370 to 2,000 mg/kg. Last staff assigned was Pexton.

Action Information

Action Date Action Description DEC Staff
1/30/1998 Site Characterization Report Approved (Old R:Base Action Code = SA1A - Phase I Site Assessment Approval). Received Final Report Preliminary Assessment/Site Investigation 1/30/98. Report recommends further investigation to characterize the site. Scott Pexton
6/17/1998 Site Added to Database Site added by staff. Scott Pexton
6/17/1998 Site Ranked Using the AHRM Site ranked by staff. Scott Pexton
10/11/2000 Update or Other Action Letter sent to Norman Straub suggesting the ADEC Voluntary Cleanup Program as a cost-effective cleanup approach for this site. Scott Pexton
3/12/2004 Update or Other Action ADEC received draft Alternate Cleanup Level Demonstration Project. Beatrice Egbejimba
4/9/2004 Update or Other Action File number assigned: 490.38.004. Sarah Cunningham
2/7/2005 Update or Other Action Staff 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
5/9/2006 Update or Other Action The Draft Alternative Cleanup Level Demonstration Project Report, Shungnak FSA, April 2006 was reviewed and a comment letter sent to the AKARNG. Debra Caillouet
5/4/2007 Cleanup Level(s) Approved The transmittal letter submitted with the report requests alternative soil cleanup levels developed using method three under 18 AAC 75.340(a)(3) and proposed in the report be approved for use at the site. The cleanup levels proposed are based on a site specific total organic carbon (TOC) content in the soil of 9.6 percent rather than the default 0.1 percent, dry bulk soil density 1.86 g/cm3 (default 1.5 g/cm3 ) and an average moisture content of 11.2 % (default 10%). The average moisture content was obtained by averaging the results of one sampling event. DEC does not concur with the use of the average moisture value, as it should be obtained over multiple seasons. DEC does concur with the use of the TOC value and the bulk soil density. 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 2400 mg/Kg Benzene 0.0514 mg/Kg Toluene 26 mg/Kg Ethylbenzene 34.4 mg/Kg Xylenes 492 mg/Kg Debra Caillouet
1/31/2008 Update or Other Action Staff review a contamination delineation report and advised the AKARNG of the expected content of a decision document. Debra Caillouet
4/2/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Debra Caillouet
5/12/2008 Update or Other Action Comments were sent to the AKARNG on the draft corrective action plan. Debra Caillouet
5/28/2008 Cleanup Plan Approved Cleanup plan approved Debra Caillouet
12/3/2008 Report or Workplan Review - Other Comments were sent to the Guard on the draft Corrective Action Report. Debra Caillouet
1/2/2009 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 74073 Spills/Leaks. Debra Caillouet
1/5/2009 Cleanup Complete Determination Issued The final 2008 cleanup report was approved showing that the cleanup was complete. Debra Caillouet

Contaminant Information

Name Level Description Media Comments
DRO < Method 2 Most Stringent Soil

Control Type

Type Details
No ICs Required


Description Details
Advance approval required to transport soil or groundwater off-site.

Missing Location Data

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