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Site Report: ADOT&PF Chalkyitsik Airport SREB & Apron ASTs

Site Name: ADOT&PF Chalkyitsik Airport SREB & Apron ASTs
Address: Chalkyitsik Airport Apron, End of Marten Street, Chalkyitsik, AK 99788
File Number: 720.38.004
Hazard ID: 25308
Status: Active
Staff: Amy Rodman, 9074655368
Latitude: 66.649162
Longitude: -143.728331
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.


During a site inspection in 2002, stained soil was evident near a gasoline tank and near two diesel tanks located on the airport apron. At the gas tank, three soil samples collected at the outlet of the tank contained GRO up to 15,000 mg/kg, benzene up to 293 mg/kg, ethybenzene up to 496 mg/kg, toluene up to 3,000 mg/kg, and xylenes up to 2,938 mg/kg at 0.5 feet bgs; and benzene up to 4.54 mg/kg and toluene up to 30.2 mg/kg at 5 feet bgs. An estimated 10 cubic yards of contaminated surface soil remains at the gasoline tank. At the diesel tanks, soil samples collected in a stained area 0.5 ft. bgs at the outlet, contained DRO up to 2,200 mg/kg. Subsurface soil samples were not collected at the diesel tank due to compacted soil. In 2009, petroleum stained soil was encountered inside the ADOT&PF snow removal equipment building (SREB). It is assumed that vehicle storage and maintenance activities in the SREB resulted in historic spills and leaks impacting the dirt floor. A site inspection conducted in 2011 did not find signs of contamination inside of the building, however drums of fuel were noted on the ground with no liner, and visible staining to the east of the SREB. The three tanks also lacked obvious signs of contamination. ADEC received a memo regarding a 2014 removal effort conducted in Chalkyitsik. In 2014, ADOT&PF mobilized to Chalkyitsik in order remove multiple drums of waste including lube oil and remove stained soil. A 10x6 stain was present from a single leaking partial drum of lube oil. An excavator and hand shoveling were utilized to fill two 85 gallon drums with contaminated soil. Two 85 gallon overpacks that were used for waste; one 85 gallon drum used for On Spec used oil, two 55 gallon drums of lightly oiled water, and three 85 gallon drums of lube oil contaminated soil were removed from the site by barge to Emerald Alaska for disposal.

Action Information

Action Date Action Description DEC Staff
4/25/2003 Report or Workplan Review - Other Chalkyitsik Site Characterization Project Report, submitted by Oasis, with this date. Areas potentially contaminated by fuel at the existing tank farm and various other fuel storage and transfer tanks in the village were targeted for assessment. The goal was to access the amount of fuel contamination present in site soils and groundwater, develop a preliminary evaluation of the risk posed by the contamination, and to develop recommendations regarding how to remediate the sites. Two types of sites were investigated: primary sites including the existing tank farm and secondary sites such as small fuel storage tanks and/or potential spill sites. Multiple sites were found throughout Chalkyitsik with contamination above ADEC cleanup levels. Grant Lidren
4/25/2003 Site Added to Database A new site has been added to the database (Date adjusted from 12/31/2008 for report/query consistency. (Reese)) Mitzi Read
12/11/2008 Update or Other Action Ellen Williams from DEC's Drinking Water Program indicates Chalkyitsik's public water system is a Class A system consisting of 1 surface water intake source. The water system is located in Chalkyitsik. The overall protection area received a susceptibility rating of "very high". In addition, this water system received a vulnerability rating of "high" for bacteria/viruses, "medium" for nitrates/nitrites, "medium" for volatile organic chemicals, "medium" for heavy metals, "medium" for other organic chemicals, and "medium" for synthetic organic chemicals. Grant Lidren
12/31/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78659 name: ADOT&PF Chalkyitsik Airport Apron Gas and Diesel Tanks Grant Lidren
3/13/2009 Update or Other Action A discussion with the Chalkyitsik Tribal Council indicates the DOT is planning on moving the airport south by 2,000 feet. ADEC sent an email to the DOT today to verify their relocation plans and to learn about their plans to address contaminated soil at the SREB at that time. Grant Lidren
12/21/2009 Update or Other Action On this date, ADEC had a teleconference with ADOT&PF. The Airport SREB and apron will be relocated south about 2,500 feet in the future. The village may also relocate their tank farm as well. The ADEC sent the ADOT&F an email requesting a work plan for proposed activities. Grant Lidren
5/26/2011 Update or Other Action Per a phone conversation with SLR on this date, despite efforts to obtain cleanfill, no clean fill was able to be obtained/stockpiled during the Spring of 2011, due to logistical problems. Grant Lidren
6/15/2011 Site Visit ADEC Staff and SLR performed a site visit to the Chalkyitsik SREB (located off the SW corner of the sewage lagoon today (GPS coordinate 66.64917, -143.72810)). No obvious signs of contamination were noted inside the building (see picture in G-drive). Located east of the SREB, Drums full of fuel were noted on the ground with no liner (GPS coordinate 66.64916, -143.72792). Staining was noted around the drums. A single gasoline tank was located on the airport apron at 66.64900, -143.72934. No obvious signs of contamination was noted near the gas tank. Likewise, two diesel tanks on the southern part of the apron lacked obvious signs of contamination. Grant Lidren
3/14/2012 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78659 ADOT&PF Chalkyitsik Airport Apron Gas and Diesel Tanks. Grant Lidren
3/14/2013 Update or Other Action Coordinates obtained from DCRA and confirmed on Google Earth. DCRA imagery has better resolution for this site. Richard Bernhardt
5/19/2014 Update or Other Action The Alaska Department of Transportation & Public Facilities (ADOT&PF) will be traveling to Chalkyitsik in June of 2014 to collect a few soil samples and remove use oil drums from the site. Joshua Barsis
12/11/2015 Report or Workplan Review - Other Memorandum concerning Department of Transportation's (DOT's) September 2014 cleanup efforts received. Memo includes pictures of drums removed, as well as Non-hazardous Waste Manifests. Drums containing used oil, oily water and contaminated soil were transported offsite (two 85 gallon drums were filled with lube oil contaminated soil and transported offsite). No analytical testing was conducted. Lisa Griswold
1/18/2017 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78659 ADOT&PF Chalkyitsik Airport Apron Gas and Diesel Tanks. Lisa Griswold
1/19/2017 Update or Other Action Site summary letter sent today. Lisa Griswold
5/10/2017 Update or Other Action Site Transferred to Rodman Lisa Griswold
7/3/2018 Update or Other Action Site summary emailed to RP, noting issues that need to be addressed for site closure. Amy Rodman

Contaminant Information

Name Level Description Media Comments

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Description Details

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