Site Report: NSB Point Hope Tikigaq School Diesel Tank
| Site Name: | NSB Point Hope Tikigaq School Diesel Tank |
|---|---|
| Address: | Point Hope, Point Hope, AK 99766 |
| File Number: | 420.38.004 |
| Hazard ID: | 2641 |
| Status: | Cleanup Complete - Institutional Controls |
| Staff: | IC Unit, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 68.349500 |
| Longitude: | -166.737500 |
| 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
Diesel contaminated soil at the Diesel Holding Tank location. The release appears to be the result of overfilling of the tank through the years. Excavation, stockpiling and sampling activities were performed in 1996. A total of 130 cubic yards of contaminated soil was excavated and stockpiled along the southern boundary of the village at the end of Milviksaagiaq Drive. Six confirmation soil samples were taken from the excavation pit. Diesel range organics (DRO) were detected up to 820 mg/kg and benzene was detected in one sample at 0.019 mg/kg. A site assessment conducted in 2005 reported the 130 cubic yard contaminated soil stockpile stored at the end of Milviksaagiaq road was remediated and used for landfill cover. The North Slope discovered the contaminated soil while changing the location of the diesel holding tank.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 7/22/1996 | Site Added to Database | Diesel contamination. | Shah Alam |
| 11/21/1996 | Update or Other Action | Philip Environmental Services Corporation completed excavation, stockpiling and sampling activities between July 1-8, 1996. A total of 130 cubic yards of contaminated soil excavated and stockpiled along the southern boundary of the village at the end of Milviksaagiaq Drive. Six confirmed soil samples and one duplicate were collected from the site. These sample were analyzed for DRO (AK102) and BTEX (EPA8260). Only one sample (soil) was above the regulatory limit for DRO at 820 ppm. This sample was taken from a lens of peaty organic material that extended beneath the school. Further excavation in the area was not advised due to the possibility of jeopardizing the foundation of the existing building. A protective impermeable liner was placed in this area prior to the commencement of construction activities. | Shah Alam |
| 7/6/2005 | Update or Other Action | North Slope Villages Contaminated Soils Sites 15-085 areawide Contaminated sites Assessment- dated 6/29/2005, submitted by Shannon & Wilson and recieved by ADEC on this date. The 130 cubic yard contaminated soil stockpile stored at the end of Milviksaagiaq road was reportedly remediated and used for landfill cover. | Grant Lidren |
| 10/24/2007 | Meeting or Teleconference Held | Meeting today with NSB and their consultant to discuss site status. | Bill O'Connell |
| 2/7/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Grant Lidren |
| 5/8/2008 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed. | Bill O'Connell |
| 5/19/2008 | Conditional Closure Approved | The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed review of the environmental records associated with Tikigaq School Diesel Tank. This site had been contaminated by the release of a hazardous substance; however, based on the information provided to date, ADEC has determined that no further remedial action is required, and that Tikigaq School Diesel Tank can be closed subject to the conditions outlined in this document. The hazardous substance contamination has been adequately addressed and does not pose an unacceptable risk to human health or the environment. | Grant Lidren |
| 5/19/2008 | Institutional Control Record Established | There is contamination remaining above established cleanup levels at the Tikigaq School Diesel Tank, but ADEC has determined there is no unacceptable risk to human health or the environment, and this site will be conditionally closed. This decision is subject to the following conditions: 1. A Notice of Environmental Contamination will be recorded on the ADEC database to document that there may be residual contamination remaining on site above the most stringent ADEC cleanup levels; 2. Any proposal to transport soil or groundwater off site requires ADEC approval in accordance with 18 AAC 75.370 (b) | Grant Lidren |
| 6/12/2012 | Institutional Control Compliance Review | An IC review was conducted on this site and the staff assigned was changed from Bill O'Connell to IC Unit. | Evonne Reese |
| 8/14/2014 | Update or Other Action | Staff name changed from IC Unit to McLoone. | Evonne Reese |
| 10/21/2016 | Institutional Control Compliance Review | Staff changed from Joshua Barsis to IC Unit. IC compliance review conducted. IC reminder letter issued. Reminder system set to follow-up every five years. | Kristin Thompson |
| 8/3/2023 | Institutional Control Compliance Review | Compliance review conducted and an IC reminder letter was issued to the landowner. The next review will be due in five years. | 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 |
|---|---|
| CS Database Notation And Letter To Landowner/RP |
Requirements
| Description | Details |
|---|---|
| Excavation / Soil Movement Restrictions | Any proposal to transport soil or groundwater off site requires ADEC approval in accordance with 18 AAC 75.370 (b) |
| Advance approval required to transport soil or groundwater off-site. | Standard condition. |
| 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. |
No associated sites were found.