Site Report: Chefornak Light Plant Former Tank Farm
| Site Name: | Chefornak Light Plant Former Tank Farm |
|---|---|
| Address: | South Bank of Kinia River, 98 Air Miles SW of Bethel, Chefornak, AK 99561 |
| File Number: | 2408.38.002 |
| Hazard ID: | 3778 |
| Status: | Active |
| Staff: | * Currently Not Assigned, 9072693057 bill.oconnell@alaska.gov |
| Latitude: | 60.159804 |
| Longitude: | -164.285853 |
| Horizontal Datum: | NAD83 |
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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
This site is the location of the former light plan tank farm. The new tank farm is located approximately 200 feet to the northwest of the former tank farm. All the old piping and tanks had been removed from their previous location. The former tank farm consisted of four tanks (three vertical and one horizontal) with a total fuel storage capacity of approximately 44,900 gallons. The tanks were welded steel construction and rested on wood platforms made of treated timbers and planks. Much of the area exhibited stressed vegetation, but it was not determined whether this was due to hydrocarbon contamination or the result of shade cast over the area by the tanks in the tank farm and activity in the area. Site assesment performed in August 2001. Analytical sample results for DRO concentrations in the former light plant tank farm area ranged from non-detect to 17,000 mg/kg. In general the highest levels of DRO impact were observed south of the lined area of the former light plant tank farm. The site is approximately one-quarter mile from the village school.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 4/9/2002 | Update or Other Action | Date of Village of Chefornak Site Assessment Project Report by Oasis which led to this contaminated site listing. Report contained in 2408.38.000 (Chefornak Village Tank Farms and Former Tank Farms). | Keather McLoone |
| 4/10/2003 | Site Added to Database | DRO contamination. | Deborah Williams |
| 3/2/2004 | Update or Other Action | Due to withdrawal ofTAPL funding from the Alaska Energy Authority assessment and remediation work will not be performed by ADEC. | Mike Jaynes |
| 7/14/2004 | Update or Other Action | File number changed from 2408.42.001 to 2408.38.002 | Sarah Cunningham |
| 3/17/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Bill O'Connell |
| 8/22/2012 | Potentially Responsible Party/State Interest Letter | PRP letter sent to the City of Chefornak on this date. | Grant Lidren |
| 9/14/2012 | Site Characterization Workplan Approved | On this date ADEC approved the workplan for soil sampling at Chefornak Light Plant Former Tank Farm and Former Chefarnmute Corporation Tank Farm. Sixteen Soil borings will be advanced and one analytical soil sample will be collected from each borehole. | Grant Lidren |
| 9/18/2012 | Site Visit | ADEC performed a site visit on this date during characterization work by S&W. | Grant Lidren |
| 4/24/2013 | Site Characterization Report Approved | On this date, ADEC received the Site Characterization Chefornak Light Plant Former Tank Farm and Former Chefarnmute Corporation Tank Farm submitted by S&W dated December 2012. A total of 17 soil borings were advanced: nine at the Light Plant former TF (1.5 to 3.0 feet bgs) and eight at the Chefarnmute Corp. former TF (1.2 to 4 ft. bgs). At least one soil sample was collected per boring based off pid levels and field observations. Three of the nine soil samples collected at the Light Plant former tank farm contained DRO above cleanup levels. These soil samples - including B8, B8 dup, and B7 - contained DRO up to 643 mg/kg. Two of the nine soil samples collected at the Chefarnmute Corp. former TF contained DRO above cleanup levels. These soil samples - including B10 dup and B15 - contained DRO at 262 mg/kg (at 2.5 to 3.0 ft. bgs) and 18,600 mg/kg (at 1.5 to 2.0 ft. bgs) respectively. | Grant Lidren |
| 6/30/2015 | Update or Other Action | File review completed. No new information available. SUMMARY: Contamination was originally identified during a Village of Chefornak Site Assessment Project completed in August 2001. The purpose of the site assessment was to investigate the presence and extent of contamination at five former bulk aboveground storage tank (AST) facilities in Chefornak. During the assessment, limited sampling was completed and revealed that diesel range organic (DRO) was present in the surface soils up to 17,000 mg/kg at this site, which exceeds the ADEC migration to groundwater (MTG) cleanup level of 250 mg/kg. Further characterization was completed in 2012 by the City of Chefornak. Soil samples were collected from 9 soil borings that were advanced to depths between 1.5 and 3 feet below ground surface (bgs). DRO was present in all soil samples between 33.7 mg/kg and 643 mg/kg. | Joshua Barsis |
| 10/26/2015 | Update or Other Action | Letter sent with request for work plan by February 1, 2016. | Joshua Barsis |
| 9/14/2016 | Update or Other Action | Sent overdue work plan notice to City of Chefornak. | Erin Gleason |
| 11/21/2016 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 74753 Former ASTs. | Erin Gleason |
| 11/23/2016 | Update or Other Action | Sent letter to Nateraq Light Plant (Chefarnrmute, Inc.) with an update on the site, information about brownfield funding, and reminder about the work plan due date. | Erin Gleason |
| 12/4/2017 | Update or Other Action | sent overdue work plan notice to Naterkaq (Chefarnmute Inc). | Erin Gleason |
| 12/5/2017 | Update or Other Action | Overdue work plan letter sent to City of Chefornak | Erin Gleason |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.