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Site Report: FAA Nenana Station Landfill

Site Name: FAA Nenana Station Landfill
Address: ~1 Mile North of Nenana, Nenana, AK 99760
File Number: 110.38.005
Hazard ID: 25793
Status: Active
Staff: Tim Sharp, 9074512131 tim.sharp@alaska.gov
Latitude: 64.582216
Longitude: -149.093657
Horizontal Datum:WGS84

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

The landfill is located on a north facing slope along the FAA road to the VORTAC. The northern most edge of the landfill is described as a steep 6-8’ drop off. The 1992 ECIR describes stressed vegetation beneath the drop off and exposed debris including inert building material crushed empty drums and lead batteries near the toe of the landill. The landfill was capped, presumably in the late 70’s, and the cap was inspected and found to be in good shape in 1997, with the exception of the northern edge where cover was measured at approximately 4". The landfill was described as being overgrown with trees and brush. The trees were said to be 5” in diameter in 1992. Soil sampling: In 1992, four soil samples were collected near the stressed vegetation on the northern edge of the landfill and sampled for RCRA metals, BNA, EPH, VPH, TRPH, chlorinated herbicides, pesticides and PCBs. One sample near the batteries contained 950 mg/kg lead. Other analytes were either non-detect, or contained trace concentrations well below cleanup levels.

Action Information

Action Date Action Description DEC Staff
1/9/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Initial ranking of the Landfill. Created a complete site summary and saved it to the electronic file. Kim DeRuyter
1/5/2012 Site Added to Database A new site has been added to the database Mitzi Read
7/31/2015 Site Visit Visited FAA Nenana sites while at location with USFWS. This site appears to be mapped incorrectly in database as the landfill is Southeast of GIS location. Other concerns are extensive debris at repeater station and poorly drained cap at landfill. It appears the landfill is being used currently. Slight odor of fuel in soil at pump station by Railroad. Follow up site visit to document is needed. Fred Vreeman
4/26/2016 Update or Other Action Site reassigned for follow up by project manager Fred Vreeman
5/4/2017 Update or Other Action Request for update sent Gretchen Caudill
7/6/2018 Update or Other Action FAA updated DEC - a contract has been awarded for a site investigation at the dump and former pump house. A work plan is expected summer 2018. Gretchen Caudill
8/27/2018 Document, Report, or Work plan Review - other Remedial Investigation WP reviewed and DEC comments provided. Objectives include: • Advance soil borings and collect surface and subsurface soil samples to delineate the presence and extent of contamination in soil adjacent to the Former Fuel Storage and Pipeline Facility. • Install test pits to assess landfill contents and collect analytical soil samples in the Former Landfill Site. • Decommission historical groundwater monitoring wells at the Former Julius H-Marker site. Gretchen Caudill
3/12/2019 Document, Report, or Work plan Review - other DEC Approval Site Investigation Report- This report details the well decommissioning at the Julius H-Marker Site and the soil investigations at the Former Fuel Storage and Pipeline Facility Site and the Former Landfill Site. The Former Fuel Storage and Pipeline Facility contained a concentration of 1,1,2-trichloroethane above DEC cleanup level in surface soils. The Former Landfill Site contained dioxins, dieldrin, and 1,2,4-trichlorobenzene above DEC cleanup levels in subsurface soils. Exceedances of cleanup levels were relegated to the north portion of the landfill. As samples were composited at the landfill,all analytes documented within 1/10 of their respective cleanup levels should be included in the confirmation sampling at the time of future removal efforts. Gretchen Caudill
5/20/2019 Document, Report, or Work plan Review - other DEC Approval - The Site Investigation documented dioxins, pesticides, and 1,2,4-trichlorobenzene in concentrations exceeding cleanup levels. The total estimated volume of debris is ~358 cubic yards. The most contaminated area is on the north side of the landfill. Gretchen Caudill
3/24/2020 Document, Report, or Work plan Review - other DEC approved Final Work Plan for removal action in 2020. All debris and contaminated soil is planned to be excavated, separated into appropriate waste streams, and disposed of accordingly. Field screening samples and confirmation samples will be taken to ensure the contamination is completely removed. The site will then be backfilled with clean on-site material and gravel from the nearby Toghotthele gravel pit. Work may be postponed due to COVID-19 pandemic. Tim Sharp
8/31/2020 Document, Report, or Work plan Review - other DEC Approved 2020 Addendum WP for the Fuel Storage and Pipeline area. FAA will sample area surrounding a 1,1,2 TCA exceedance. Work originally scheduled for 2020 but is now postponed to 2021 due to COVID-19. Tim Sharp
8/30/2021 Update or Other Action DEC approved transport of 543 cy of dioxin contaminated soils to Roosevelt landfill in Washington Tim Sharp
3/15/2022 Document, Report, or Work plan Review - other DEC sent comments on the Draft Landfill RA Report, which included sampling for 1,1,2-TCA the Fuel Storage and Pipeline site as well. The report discussed removal, transportation, and disposal of all debris and dioxin-contaminated soil from the landfill. Confirmation sampling at the landfill shows exceedances of applicable cleanup levels for herbicides and pesticides. Six soil borings at the Fuel Storage site showed detections of 1,1,2-TCA that all fell below migration to groundwater cleanup levels. Waste streams were transported to the appropriate disposal facilities. Tim Sharp
3/25/2022 Document, Report, or Work plan Review - other DEC approved the Final 2021 Landfill RA and SI report. Further delineation and removal is recommended for remaining 2,4 D contamination. Tim Sharp
10/3/2022 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78309 Landfill. Tim Sharp
1/11/2023 Document, Report, or Work plan Review - other DEC submitted a comment on the Draft 2023 Work Plan Addendum for the FAA Nenana Station Landfill Removal Action. The work plan addendum describes additional work to be performed at the Nenana Station Former Landfill site. The FAA’s objectives for work at the site are to remove, transport, and dispose of all surface and subsurface herbicide and pesticide impacted soils, collect confirmation analytical soil samples from this excavation, and backfill the site with clean fill. The only comment concerns ensuring all contaminants of potential concern are accounted for during the sampling efforts. Tim Sharp
3/29/2023 Document, Report, or Work plan Review - other DEC approved the Final Work Plan Addendum 2 for the Landfill Remedial Action. Tim Sharp
10/16/2023 Document, Report, or Work plan Review - other DEC has reviewed the Draft Remedial Action Report, which details the 2023 remedial action performed at the Nenana FAA Station Former Landfill site. The FAA removed over 30 tons of herbicide and pesticide contaminated soil and collected confirmation samples from the excavation sidewalls. The excavation floor could not be sampled as the excavation reached bedrock. Confirmation samples concluded that 2,4-dichlorophenoxyacetic acid (2,4-D), 4,4’-dichlorodiphenyldichloroethane (DDD), 4,4'-dichlorodiphenyldichloroethylene (DDE), and 4,4’-dichlorodiphenyltrichloroethane (DDT) all exceeded cleanup levels in soil. Lead was also detected above human health cleanup levels in soil. Groundwater was not detected during remedial actions. The report recommends fully characterizing the lateral extent of contaminants of concern (COCs) and remedial action once characterization is complete. Tim Sharp
10/16/2023 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78309 Landfill. Tim Sharp
1/3/2024 Document, Report, or Work plan Review - other DEC Approved the Final Nenana FAA Station Former Landfill Remedial Action Report, dated December 2023. Tim Sharp
9/17/2024 Document, Report, or Work plan Review - other DEC has reviewed the Draft Remedial Investigation work plan, which details proposed test pitting activities to ascertain the extent of herbicide and lead contaminated soil. The site has been subject to several excavation efforts previously, and so extensive characterization of the contaminated soil is desired prior to another excavation effort to ensure the FAA can make informed decisions regarding future remedial actions. DEC submitted comments on this date. Tim Sharp

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

There are no documents for this site report.

Hazard ID Site Name File Number
4549 FAA Nenana Station (North) 110.38.005

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby