Site Report: Mentasta Village Clinic
| Site Name: | Mentasta Village Clinic |
|---|---|
| Address: | P.O. Box 600, Mentasta Lake, AK 99780 |
| File Number: | 210.38.002 |
| Hazard ID: | 1155 |
| Status: | Cleanup Complete |
| Staff: | IC Unit, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 62.902500 |
| Longitude: | -143.748090 |
| Horizontal Datum: |
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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
A history of leakage from a 300 gallon heating fuel tank located behind the clinic building and next to clinic's well house resulted in fuel contaminated soils. Spill was noted in spring of 1990 after two attempts to fill the tank were unsuccessful. Cleanup commenced. Drinking water samples from 1990 and 2002 have not shown any evidence of fuel contamination. Notice of Environmental Contamination: ADEC recommends that the residential water well established at the former tank site be monitored every three to five years for petroleum contamination, including volatile organic compounds. Some contamination likely remains in the subsurface soils at the limits of the tank excavation. Approximately 350 cubic yards of uncharacterized soils are stockpiled within the village firebreak. It is unknown to what levels the stockpiled soil is contaminated with petroleum.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 5/17/1990 | Update or Other Action | (Old R:Base Action Code = FI - Field Inspection (General)). Morgan and Thomas visited the site in order to conduct a brief investigation and determine the extent of contamination. | Ben Thomas |
| 6/1/1990 | Interim Removal Action Approved | (Old R:Base Action Code = REM - Removal / Excavation). Approximately 7,000 cubic yards of contaminated soil was excavated by Mentasta Village and taken 1/4 mile away to lined and covered pits. Thomas collected water samples using EPA method 503.1 which proved to be below MCL and no floating product was observed in the well during hand bailing. | Ben Thomas |
| 6/15/1990 | Update or Other Action | (Old R:Base Action Code = FI - Field Inspection (General)). Using a Photo Ionization Detector (HNU) at the excavation site, Thomas found in excess of 150 ppm in vapors near the tank, but lower than 10 ppm elsewhere in the pit. | Ben Thomas |
| 7/27/1990 | Site Added to Database | Heating fuel. | Former Staff |
| 12/5/1990 | Site Ranked Using the AHRM | Initial ranking. | Former Staff |
| 8/24/1991 | Update or Other Action | (Old R:Base Action Code = RECN - Site Reconnaissance (CS)). Kalu and Noland inspected stockpiled soils which are no longer covered. 2 stockpiles located near community and school, 1 stockpile located approximately 1/2 mile away. | Kalu Kalu |
| 6/20/1994 | Update or Other Action | (Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. | Jeff Peterson |
| 3/5/2001 | Update or Other Action | File number updated from 210.02.014 to 210.38.002. | Mitzi Read |
| 7/31/2006 | Update or Other Action | Review of file shows contamination removed from site and stockpiled 1/4 mile away. No monitoring of the stockpile has occurred. Phone conversation with Tribal Administrator Shawn Sanford confirmed that stockpiles are still intact. Letter sent requesting characterization of the stockpiled soils. Response due 9/1/06. | Shannon Oelkers |
| 3/27/2007 | Exposure Tracking Model Ranking | Intitial Ranking Complete for Source Area: 78182 (Autogenerated Action) | |
| 3/27/2007 | Exposure Tracking Model Ranking | Intitial Ranking Complete for Source Area: 78181 (Autogenerated Action) | |
| 5/1/2007 | Meeting or Teleconference Held | Site Visit by ADEC Staff Oelkers and Williams. The clinic building is now a residence. A private well has been installed (2005) within 50 feet of the former tank site. The stockpiles located behind the building have been removed or graded. Remnants of a tarp and possible liner material were observed at the edge of the site. The stockpile located 1/4 mile uphill from the village is centered within the firebreak. Approximately 250 cubic yards were observed. Bottom liner is compromised. Top liner is completely disintegrated. Trees, grass and shrubs all growing on top of the stockpile. Some areas of the stockpile were noticeably not overgrown by vegetation. Search of the village and conversation with city clerk Virginia John confirm that only 250 cy remain. Unsure if the origianl entry of 7,000 cy was accurate. Depth to GW is generally 180-250 feet bgs. | Shannon Oelkers |
| 5/14/2007 | Exposure Tracking Model Ranking | Updated Ranking Complete for Source Area: 78181 (Autogenerated Action) | |
| 5/14/2007 | Exposure Tracking Model Ranking | Updated Ranking Complete for Source Area: 78182 (Autogenerated Action) | |
| 5/17/2007 | Conditional Closure Approved | Based on the information provided to date, ADEC has determined that the cleanup actions employed at the former Mentasta Village Clinic were effective in removing the source(s) of the contamination at the site. The stockpiled soils are being beneficially used as part of the village firebreak and are located in a non-environmentally sensitive area. | Shannon Oelkers |
| 5/17/2007 | Institutional Control Record Established | The contamination remaining at the former tank site and in the stockpile along the firebreak does not pose an unacceptable risk to human health or the environment provided site specific conditions and/or controls are attached to the property. As a result of this determination, ADEC will require no further remedial action subject to the following conditions: 1. A Notice of Environmental Contamination will be listed on the ADEC Contaminated Sites Database identifying the nature and extent of contamination remaining on site. 2. In accordance with 18 AAC 75.370(b), ADEC approval must be obtained prior to removal and/or disposal of soil or groundwater from this site to an off-site location. ADEC recommends that the residential water well established at the former tank site be monitored every three to five years for petroleum contamination, including volatile organic compounds. Site closure (without conditions) can be achieved when soil sampling confirms that all soil meets the most stringent 18 AAC 75.341 Method Two, migration to groundwater, Under 40 Inch Zone, cleanup levels. | Shannon Oelkers |
| 9/17/2007 | Update or Other Action | Updated staff assigned to Bill O'Connell. | Hannah Lager |
| 6/11/2012 | Institutional Control Compliance Review | IC review conducted and staff name changed from Bill O’Connell to IC Unit. | Evonne Reese |
| 6/11/2012 | Institutional Control Record Removed | This site meets the 2009 closure policy requirements therefore ICs can be removed. The default requirement of no offsite transport of soil or groundwater from this site will still apply. | Evonne Reese |
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. |
No associated sites were found.