Site Report: Tanacross NALEMP CANOL Pipeline Investigation
| Site Name: | Tanacross NALEMP CANOL Pipeline Investigation |
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| Address: | Native Allotments FF012549C, FF014444B, and F033943, Tanacross, AK 99776 |
| File Number: | 255.38.004 |
| Hazard ID: | 25847 |
| Status: | Active |
| Staff: | Kelly Walker, 9074512166 kelly.walker@alaska.gov |
| Latitude: | 63.361867 |
| Longitude: | -143.345419 |
| 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
Through the Native American Lands Environmental Mitigation Program (NALEMP), the Native Village of Tanacross conducted preliminary site assessments at four native owned allotments along the CANOL (Canadian Oil) pipeline corridor. Transects of all four allotments were walked to inventory and document any military debris found and identify potential contamination sources. Limited surface soil samples were collected where potential contamination was observed. At two of the allotments, additional subsurface sampling was conducted along the former pipeline location. The site assessment activities confirmed the presence of military debris and that contamination above the applicable cleanup levels is present in soil.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 2/22/2012 | Site Characterization Report Approved | Approved final report documenting preliminary assessment and characterization activities at 4 native allotments along the Canadian Oil (CANOL) pipeline corridor. Soil samples indicate petroleum contamination was found at the sites above the applicable cleanup levels. | Melody Debenham |
| 2/24/2012 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 8/18/2015 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79265 name: Tanacross NALEMP CANOL Pipeline Investigation | Melody Debenham |
| 8/10/2017 | Document, Report, or Work plan Review - other | DEC has approved the ‘Final Groundwater Monitoring, Removal Action, and Site Investigation Work Plan, Tanacross Airfield and CANOL Pipeline NALEMP Sites for the Native Village of Tanacross,’ dated August 2017. The proposed field activities include; perform groundwater monitoring at Area 3 monitoring wells (Former Generator for Airport Beacon), carry out a removal action/site investigation at the drum landfill near the Small Arms Range site, and perform a site investigation along the CANOL Pipeline Corridor at Site No. 2 (NALEMP CANOL Pipeline Investigation). | Erica Blake |
| 8/29/2017 | Site Visit | Performed a site visit to the NALEMP Tanacross Airfield sites and the Tanacross NALEMP CANOL Pipeline Site No. 2. Provided oversight on Bristol groundwater sampling at Area 3 (Former Generator for Airport Beacon). Could not view Area 6 (Former ACS Tower and Supports) due to private property access issues. | Erica Blake |
| 2/20/2018 | Meeting or Teleconference Held | DEC, U.S. Army Corp of Engineers (USACE) and the Native Village of Tanacross held a meeting on February 20, 2018 at the Anchorage DEC Office to discuss cleanup progress and upcoming 2018 work at the Tanacross Airfield sites. DEC is expecting a work plan addendum this spring 2018, detailing the planned 2018 field activities. | Erica Blake |
| 7/11/2018 | Document, Report, or Work plan Review - other | DEC approved the Interim Removal Action/Site Investigation Report and Work Plan Addendum, dated July 2018. The document described results from the 2017 fieldwork, and field activities for 2018. Field activities include; groundwater sampling at Area 3 (Former Generator for Airport Beacon) and Area 7 (Former Fuel Facilities), decommissioning nine monitoring wells in Area 6 (Former ACS Site Generator and Tower Supports) and the 2,500 Drum Landfill and Half-acre dump site (Drum Landfills), the remedial action and site investigation work will continue at the Drum Landfill (DF) near the Small Arms Range (SAR) site. One monitoring well will be installed at the DF SAR site, six soil borings will be drilled at the Canadian American Northern Oil Line (CANOL) Pipeline Site No. 2 to confirm sample results from 2017, and characterizing three supersacks for disposal. Work is expected to begin around July 12, 2018 and continue until early August 2018. | Erica Blake |
| 11/16/2018 | Document, Report, or Work plan Review - other | DEC approved the 2018 removal action (RA) and site investigation (SI) report for the Tanacross Airfield Sites (TAS) and the Tanacross Canadian American Northern Oil Line (CANOL) Pipeline Corridor Site No. 2 (CANOL Site No. 2). 2018 activities conducted at the TAS included; collecting groundwater samples from Area 3 (Former Generator for Airport Beacon) and Area 7 (Former Fuel Facilities), decommissioning monitoring wells at Area 6 (Former ACS Site Generator and Tower Supports) and at the 2,500 Drum Landfill and Half-acre Dump Site, continued excavation work to delineate the Drum Landfill near the Small Arms Range, and drilling soil borings along the CANOL Site No. 2 to confirm the presence or absence of petroleum contamination. Recommendations from the report were for continued work at the Tanacross Airfield sites. Petroleum contamination was not identified at the CANOL Site No. 2; at this time, no further work is recommended. | Erica Blake |
| 4/22/2019 | Cleanup Plan Approved | 2019 Tanacross NALEMP workplan approved. Site investigation, debris and soil removal, and groundwater monitoring at different source areas within the Native Village of Tanacross Airfield and CANOL pipeline sites. Groundwater sampling will be conducted at Tanacross Airfield Area No. 7 to obtain results for informing well decommissioning. Additional investigation of the extent of petroleum contamination at Area No. 3 will be conducted, and backfilling will be undertaken at the Tanacross Airfield “Ditch Site” to eliminate trip and fall hazards. Further, up to 250 cubic yards of petroleum-contaminated soil will be removed from the Drum Landfill near the SAR site, and landfill cap evaluation will be conducted at the 2,500 Drum Landfill and Half-Acre Dump sites to assess condition and develop strategies for water infiltration and erosion. Finally, metallic debris will be removed along the CANOL pipeline corridor, and drilling will be conducted to ascertain if petroleum contamination exists in the subsurface along the corridor. | Kevin Fraley |
| 9/1/2023 | Site Characterization Workplan Approved | DEC reviewed and approved the Debris/Soil Removal and Groundwater Investigation Work Plan for the Tanacross Airfield Sites (TAS) Area No. 3, Drum Landfill Near Small Arms Range (SAR) Site, Washington-Alaska Military Cable Telegraph System (WAMCATS) Valdez-Trail Subsite 1B, Cathedral Bluff ACS Repeater Site. This work plan details the continuation of contaminated soil removal at TAS Area No. 3, debris removal at the Drum Landfill Near SAR, and the advancement of soil borings and well point installations at the WAMCATS Valdez-Trail Subsite 1B. Debris removal may also occur at the Cathedral Bluff ACS Repeater Site, if debris is encountered. | Kelly Walker |
Contaminant Information
| Name | Level Description | Media | Comments |
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Control Type
| Type | Details |
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Requirements
| Description | Details |
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No associated sites were found.