Site Report: Hilcorp NS Tract T3-C (BPX)
| Site Name: | Hilcorp NS Tract T3-C (BPX) |
|---|---|
| Address: | ~6 Miles North of Deadhorse, Deadhorse, AK 99734 |
| File Number: | 300.38.255 |
| Hazard ID: | 4290 |
| Status: | Cleanup Complete - Institutional Controls |
| Staff: | IC Unit, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 70.300500 |
| Longitude: | -148.370400 |
| 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
One well was drilled at Tract T3-C in 1981 and abandoned in 1992. The site containes a gravel pad, reserve pit, and partial flare pit. Soil borings indicated DRO at a maximum concentration of 1,500 mg/kg in the subsurface at the gravel pad and 648 mg/kg in the flare pit. Gravel pad removal is ongoing as of August 2006.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 9/6/2006 | Site Added to Database | Site added to the database. | Mitzi Read |
| 9/8/2006 | Site Characterization Report Approved | Received Tract T3-C Phase II Site Assessment and CAP final. Site investigation indicates most of the pad is not contaminated. Discreet areas of subsurface DRO contamination found on West side of pad and in reserve pit. Max DRO was 1,500 mg/kg in pad gravel; 648 mg/kg in reserve pit. | Bill O'Connell |
| 9/8/2006 | Cleanup Plan Approved | Corrective action plan includes excavation of reserve pit waste and transportation to Grind and Inject facility at DS4. Restricted use gravel will be excavated and transported to East Dock for landfarming. Conditional use and clean gravel will be used as backfill on site, with the excess used as backfill at other pads. | Bill O'Connell |
| 3/23/2007 | Exposure Tracking Model Ranking | Bill O'Connell | |
| 10/19/2007 | Site Characterization Report Approved | Recieved Tract T-3c corrective action report. Clean gravel was excavated and used as backfill at Pad 3 Cell 2.Approximately 1,950 cy of restricted use gravel was taken to East Dock for landfarming, and 395 cy of material were used to backfill the reserve pit. Confirmation samples detected DRO at a maximum concentration of 754 mg/kg following additional excavation at Area C. | Bill O'Connell |
| 4/10/2008 | Conditional Closure Approved | The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) reviewed the environmental records associated with exploration site Tract T3-C. 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 Tract T3-C can be closed subject to the conditions outlined in the Record of Decision. The hazardous substance contamination has been adequately addressed and does not pose an unacceptable risk to human health or the environment. | Bill O'Connell |
| 4/10/2008 | Institutional Control Record Established | There is contamination remaining above established cleanup levels at Tract T3-C 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 is residual contamination remaining on site above the most stringent ADEC cleanup levels; 2. Any proposal to transport soil off site requires ADEC approval in accordance with 18 AAC 75.370 (b) | Bill O'Connell |
| 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 |
| 12/4/2014 | Update or Other Action | Staff name changed from IC Unit to McLoone. | Evonne Reese |
| 9/28/2016 | Update or Other Action | At this time, the project manager chooses to retain management of this site which has institutional controls. | IC Unit |
| 3/19/2024 | Institutional Control Update | DNR-SAIL added as affiliate (Office of Primary Responsibility). For DNR LAS information: ADL# 421438 | Jennifer McGrath |
| 7/3/2024 | Institutional Control Compliance Review | IC compliance review completed on this date. An IC reminder letter was issued to the responsible party and cc’d to the landowner. The next review will be in five years’ time. | Gaige Robinson |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | > Method 1 (Arctic only) | Soil |
Control Type
| Type | Details |
|---|---|
| CS Database Notation And Letter To Landowner/RP |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.