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Site Report: AKARNG Little Diomede FSA


Site Name: AKARNG Little Diomede FSA
Address: unnamed, Little Diomede, AK 99762
File Number: 685.38.001
Hazard ID: 3249
Status: Cleanup Complete
Staff: ,
Latitude: 65.758099
Longitude: -168.951680
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

Petroleum contamination associated with above ground storage tanks. DRO in soil near former tank are reported at up to 31,000 mg/kg. Last staff assigned was Pexton.

Action Information

Action Date Action Description DEC Staff
2/2/1999 Site Ranked Using the AHRM Initial ranking. Scott Pexton
10/27/2000 Site Added to Database Petroleum contamination. No Longer Assigned
3/16/2004 Update or Other Action File number assigned: 685.38.001. Sarah Cunningham
2/4/2005 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
6/2/2005 Update or Other Action Staff reviewed the Installation Action Plan and sent the following comment. The IAP fairly presents the results of a Site Investigation in 1998. The Little Diomede Federal Scout Armory is located on a steep rocky hillside. There is no groundwater on Little Diomede Island. Diesel range organics (DRO) were reported in surface soil up to 13,000 mg/kg near the current bank of aboveground storage tanks (AST). Surface soil at the location of the former AST contained DRO up to 32,000 mg/kg. An Alternative Cleanup Level (ACL) Demonstration is currently pending for the site. The cleanup strategy for the site includes preparing a feasibility study based on the results of the ACL demonstration report and taking into consideration the high population density, thin soil, limited access and possible cultural considerations. When the alternative cleanup level demonstration results are available, DEC would like to work with the AKARNG to scope the feasibility study and determine the best course of action for the site. Debra Caillouet
5/10/2006 Update or Other Action The Draft Alternative Cleanup Level Demonstration Project Report, Diomede FSA, March 2006 was reviewed and the following comment sent to the AKARNG. DEC does not believe a Method 3 cleanup standard is applicable for this site. The fate and transport models that were used to develop the EPA Soil Screening Guidance (EPA540/R-96/018 July 1996) that our regulations are based upon did not include provisions for cobbly substrates. The absence of groundwater or surface water that could be impacted by contaminant transport and the presence of continuous permafrost removes the migration to groundwater as a complete pathway for the Diomede FSA. The inhalation and ingestion pathways are still applicable to the site and the cleanup level should be based on the more stringent of the two pathways. The laboratory report included as, Appendix B: Analytical Results, shows several results that are qualified. Please review this and add the applicable qualifiers to Table 2-3. Table 3-1 lists the soil type as fine grained soils with high organic content. The limited amount of non gravel/cobble present suggests that clean, coarse grained is more appropriate. Please revise the score for this to 10. This will change the Method 1 matrix score to 15 and would still result in a Level D cleanup level. Debra Caillouet
2/23/2007 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 74224 (Autogenerated Action)
2/26/2007 Update or Other Action letter explaining requirements for closure or conditional closure sent to the Guard Debra Caillouet
4/11/2008 Conditional Closure Approved ADEC received the letter concurring with the Conditional Closure from Inalik Native Corporation. Results of sampling and analysis at the site in 2004 showed diesel range organics present at concentrations ranging from 105 mg/kg to 4790 mg/kg. The areal extent of the contamination above the most stringent 18 AAC 75.341 Method II cleanup level of 230 mg/kg is limited to the location of the aboveground fuel storage tanks although it is unknown if any extends underneath the building. Information supporting the request for a waiver of cleanup under AS 46.04.020 includes, groundwater does not exist at Little Diomede and the drinking water source is a stream upgradient from the site. The soil present at the site contains a large proportion of boulders and cobbles and the soil samples were preferentially obtained from the fine grained portions of the soil. The site is also located in an area with tightly packed buildings and access for heavy equipment is limited, if not impossible. ADEC agrees that no further remedial action is required but the soil remaining above the most stringent cleanup levels is subject to 18 AAC 75.325 (i) A responsible person shall obtain approval before disposing of soil or groundwater from a site (1) that is subject to the site cleanup rules; or (2) for which the responsible person has received a written determination from the department under 18 AAC 75.380(d)(1). Debra Caillouet
5/29/2014 Cleanup Complete Determination Issued The only condition of the closure was approval for movement of soil which by policy change now makes the site eligible for no ICs. Debra Caillouet

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
No ICs Required

Requirements

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

Missing Location Data

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