Site Report: Yukon Flats Rural Center HOT
| Site Name: | Yukon Flats Rural Center HOT |
|---|---|
| Address: | 800 William Loola Street, Fort Yukon, AK 99740 |
| File Number: | 740.38.015 |
| Hazard ID: | 4213 |
| Status: | Cleanup Complete - Institutional Controls |
| Staff: | IC Unit, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 66.564065 |
| Longitude: | -145.258940 |
| Horizontal Datum: | WGS84 |
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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
During the removal of a 5,000-gallon heating oil tank located at the Yukon Flats Rural Center in Fort Yukon a leak was discovered. Once removed, the tank revealed eight holes, up to one-quarter inch in diameter. Following removal of the tank, two confirmation soil samples collected from the base of the excavation contained DRO up to 1,290 mg/kg and benzene up to 0.091 mg/kg. Approximately 80 cubic yards of contaminated soil were removed and stockpiled on site. Three stockpile soil samples contained DRO up to 372 mg/kg and benzene up to 0.0246 mg/kg. An estimated 40 cubic yards of contaminated soil was not removed, so as not to threaten the structural integrity of the surrounding buildings. In August 2005, the existing 80 cubic yard stockpile was land spread and the groundwater was analyzed for petroleum constituents. The soil stockpile was spread as a 2 inch layer at the north and western portions of the building at the site. Groundwater samples collected from the former tank excavation at approximately 10 feet below ground surface contained DRO up to 2.2 mg/L and benzene up to 0.0115 mg/L.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 3/3/2006 | Site Ranked Using the AHRM | This is a preliminary ranking. The contamination at the site is DRO with some benzene. | Deborah Williams |
| 3/3/2006 | GIS Position Updated | The source of the locational information was taken from the Preliminary Release Investigation Report, Appendix 1. The location was determined using the ADEC's GIS map with a NAD 83. | Deborah Williams |
| 3/3/2006 | Site Added to Database | Site added to the database. | Deborah Williams |
| 11/1/2006 | Update or Other Action | ADEC received the Groundwater Sampling and Stockpile Spreading Report for the Yukon Flats Classroom Addition heating oil tank release. According to the report, approximately 80 cubic yards of contaminated soil was stockpiled at the site and Nortech estimates approximately 40 cubic yards of contaminated soil remain at the site under the structure. One groundwater monitoring well was installed in the middle of the excavation and the results indicated 0.0115 mg/l benzene, 2.2 mg/l DRO, ND for toluene, 0.0067 mg/L ethylbenzene, and 0.00221 mg/L xylenes. The stockpile was sampled and field screened. All the samples were below 500 mg/kg so the soil was landspread on-site. Nortech recommends resampling the monitoring well in 2007. | Deborah Williams |
| 4/15/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Grant Lidren |
| 4/23/2008 | Update or Other Action | ADEC contacted UAF. Site is currently used for daytime school activities with no habitual residence. No drinking water wells exist; instead water is supplied by the City of Fort Yukon. Water is hauled in for sewage. Plans are in the works for the summer of 2009 or 2010 for the school to go on city sewer. UAF is planning to get back to DEC on whether any future drinking water wells are planned to be installed in the future. | Grant Lidren |
| 6/16/2008 | Update or Other Action | Recieved an confirmation letter dated May 2, 2008 from UAF that it is not their intention to install drinking water wells on the site. UAF is the landowner | Grant Lidren |
| 7/16/2008 | GIS Position Updated | Position updated via Google Maps Datum WGS84 | Grant Lidren |
| 4/1/2009 | Update or Other Action | A conversation with UAF on this date indicates that the proposed installation of sewage pipes for the summer of 2009 or 2010 will be excavated south of the school away from the area of the former UST excavation. | Grant Lidren |
| 5/6/2009 | Cleanup Complete Determination Issued | The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed review of the environmental records associated with the Yukon Flats Rural Center Heating Oil Tank (HOT). Based on the information provided to date, the ADEC has determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment, and no further remedial action will be required as long as the site is in compliance with established institutional controls. | Grant Lidren |
| 5/6/2009 | Institutional Control Record Established | Institutional Controls established and entered into the database. | Grant Lidren |
| 5/6/2009 | Update or Other Action | ADEC recieved a signed CC-IC agreement from UAF on this date | Grant Lidren |
| 6/13/2012 | Update or Other Action | Staff changed from Grant Lidren to IC Unit. | Kristin Thompson |
| 7/10/2012 | Institutional Control Compliance Review | IC review conducted. | Evonne Reese |
| 5/21/2014 | Institutional Control Update | An IC reminder letter was issued to the responsible party on this date. | Kristin Thompson |
| 6/17/2014 | Institutional Control Update | The IC reminder letter was returned due to having an outdated contact name. I've updated the contact name in the Affiliates information. | Evonne Reese |
| 7/28/2014 | Institutional Control Update | An IC reminder letter was issued to the updated responsible party on this date. | Kristin Thompson |
| 6/18/2018 | Institutional Control Compliance Review | IC compliance review conducted. Closure/IC Details updated. | Kristin Thompson |
| 6/6/2019 | Institutional Control Compliance Review | IC compliance conducted and a reminder letter was issued to the property owner which is the University of Fairbanks. The next review will be completed in five years' time. | Evonne Reese |
| 6/19/2024 | Institutional Control Compliance Review | IC compliance review completed on this date. An IC reminder letter was e-mailed to the landowner. The next review will be in five years’ time. | Gaige Robinson |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| Benzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | |
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil |
Control Type
| Type | Details |
|---|---|
| Signed CS Determination |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. | Standard condition. |
| Groundwater Use Restrictions | Groundwater wells may not be installed on site without ADEC approval. |
| When Contaminated Soil is Accessible, Remediation Should Occur | The soil contamination located under the building is currently inaccessible. When the building is removed and/or the soil becomes accessible, the soil must be evaluated and contamination addressed in accordance with an ADEC approved work plan. |
| Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) | Standard condition. |
| Other | UAF will report to ADEC every five years to document land use, or report as soon as they become aware of any changes in land ownership and/or use. |
No associated sites were found.