Site Report: NPS Bettles Employee Housing HOT - Bldg 104
| Site Name: | NPS Bettles Employee Housing HOT - Bldg 104 |
|---|---|
| Address: | Building Number 104, Bettles, AK 99726 |
| File Number: | 890.38.013 |
| Hazard ID: | 3813 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 66.915880 |
| Longitude: | -151.518500 |
| Horizontal Datum: |
|  |
 |  |
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 summer of 2001, a 500 gallon HOT was removed from the NPS Employee housing in Bettles. The area of contamination extended under the building and below what a backhoe could reach. A total of 40 cubic yards of contaminated soil were removed. Two soil samples and a duplicate sample taken from the bottom of the excavation indicate DRO levels of 1480-2770 mg/kg. A soil sample from the maximum excavation in the direction of the house indicated DRO levels of 482 mg/kg. The ground water table is estimated to be approximately 7 feet below the bottom of the excavation. Soil borings placed in the source area did not detect contamination at or below 10' bgs. 4 groundwater monitoring wells did not detect contaminants in the groundwater. Estimated quantity of spill is 100 gallons of diesel. Monitoring wells were removed in 2011. Contact for the National Park Service is Bill Huebner at (907) 644-3384. PERP Spill Number 01309919901, PERP File Number 410.02.108A. A Cleanup Complete determination was granted for this site on October 31, 2011.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 2/22/2002 | Site Added to Database | DRO contamination. Site transferred from PERP. | Deborah Williams |
| 2/25/2002 | Site Ranked Using the AHRM | Preliminary ranking. | Deborah Williams |
| 3/14/2002 | Site Characterization Workplan Approved | Letter sent approving Workplan with the requested modifications previously discussed with NPS. | Larry Johnson |
| 5/29/2002 | Update or Other Action | Received NPS Site Characterization Report. | Larry Johnson |
| 10/16/2002 | Update or Other Action | Received results from requested drinking water well sampling. | Larry Johnson |
| 12/20/2005 | Update or Other Action | Changed PM from Bill Janes to Mike Jaynes. Possibly mistakenly given to Bill. | Mike Jaynes |
| 6/25/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. The 2002 Site Characterization Report concludes that a thin layer of contamination remains in the soil at 7 - 10 feet bgs. Samples taken from the base of the excavation contained DRO to 4920 ppm. Soil borings placed in the source area did not detect contamination below 10'bgs. Four groundwater wells did not detect contamination. Further excavation was hindered by limitations of the equipment available during the tank removal, and proximity to the building foundation. | Kim DeRuyter |
| 8/10/2010 | Document, Report, or Work plan Review - other | Staff reviewed the file and issued a letter to National Park Service. Monitoring wells must be removed from the site before closure may be issued. | James Ward |
| 6/22/2011 | Site Characterization Workplan Approved | Staff reviewed and approved a work plan for removal of monitoring wells at the site. All monitoring wells related to this site will be removed. | James Ward |
| 10/28/2011 | Site Characterization Report Approved | Staff reviewed and approved the 2011 Monitoring Well Decommissioning report. | James Ward |
| 10/31/2011 | Cleanup Complete Determination Issued | Staff issued a Cleanup Complete determination for this site on October 31, 2011. | James Ward |
| 11/1/2011 | Institutional Control Record Removed | Institutional Controls have been removed. | James Ward |
| 9/30/2014 | Potentially Responsible Party/State Interest Letter | Potentially responsible party letter sent to the National Park Service. | Melody Debenham |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | Measured contamination from heating oil tank exceed migration to groundwater cleanup levels at 7 feet, however soils at the same location are nondetect at 10 feet. Monitoring wells were nondetect for contamination. |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.