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Site Report: AFSC AIA C-Concourse


Site Name: AFSC AIA C-Concourse
Address: Ted Stevens Int'l Airport, Anchorage, AK 99502
File Number: 2100.38.028.10
Hazard ID: 2728
Status: Active
Staff: Wendy Hansen, 9072693059 wendy.hansen@alaska.gov
Latitude: 61.174572
Longitude: -149.979350
Horizontal Datum:

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 soils widespread as a result of leaking underground fuel pipelines and vaults.

Action Information

Action Date Action Description DEC Staff
12/22/1999 Site Added to Database Diesel. Eileen Olson
1/24/2000 Site Ranked Using the AHRM Initial ranking. Eileen Olson
5/9/2000 Site Ranked Using the AHRM Changed GW Usage Value to 0.8 from 0.4 and GW Exposure Index Value from 0.4 to 1 as monitoring wells are contaminated. Eileen Olson
2/26/2007 Exposure Tracking Model Ranking Baseline ranking Todd Blessing
7/3/2007 Institutional Control Record Established In accordance with 18 AAC 75.350, ADEC has determined that the unconfined groundwater (above the Bootlegger Cove Formation) at the Anchorage International Airport (AIA) is not a current or future drinking water source. This determination is subject to the following conditions: 1. It applies only within the Airside and Commercial RMZ’s, as described in the Airport-Wide Remediation Management Plan. It does not apply within the Ecological RMZ. 2. It does not establish alternative cleanup levels within those zones but allows ADEC to use the determination in making decisions in accordance with 18 AAC 75.345(b)(2) - (3). 3. Any drinking water wells located on AIA property must be properly abandoned in accordance with ADEC decommissioning procedures within two years of this decision. 4. AIA shall prohibit the installation of any water wells, used for drinking, cooling, washdown, or any other purposes, on the AIA either through 17 AAC 42.410 (b) (27) of the airport leasing regulations or in their individual lease agreement documents. 5. The existing AIA water well used to maintain the water level in Lake Hood is not considered a drinking water well. However, AIA is responsible for determining its wellhead protection area and ensuring that it maintains levels at or below 18 AAC 75.345 Table C values, unless otherwise approved by ADEC. March 19, 2007 Amendment: DEC has determined that the shallow groundwater along the Lake Hood shoreline is not a current or future drinking water source in accordance with 18 AAC 75.350. Therefore, the March 2001 groundwater use determination is amended to include the shallow groundwater in the Ecological RMZ in that determination. Todd Blessing
6/3/2008 Update or Other Action DEC staff reviewed a field summary report for Remote Overnight Parking (RON) 7-11. RON 7-11 area is located roughly 1,000 feet west of Concourse C terminal. Contaminated soil was identified and left in place (along the former fuel line alignment located near the Left 300 foot offset). Approximately 525 cubic yards of contaminated soil was transported to ANC's landfarm area to be treated. Todd Blessing
6/3/2008 Update or Other Action DEC staff reviewed a field summary report for Remote Overnight Parking (RON) 7-11. RON 7-11 area is located roughly 1,000 feet west of Concourse C terminal. Contaminated soil was identified and left in place (along the former fuel line alignment located near the Left 300 foot offset). Approximately 525 cubic yards of contaminated soil was transported to ANC's landfarm area to be treated. Todd Blessing
6/3/2008 Update or Other Action DEC staff reviewed a field summary report for Remote Overnight Parking (RON) 7-11. RON 7-11 area is located roughly 1,000 feet west of Concourse C terminal. Contaminated soil was identified and left in place (along the former fuel line alignment located near the Left 300 foot offset). Approximately 525 cubic yards of contaminated soil was transported to ANC's landfarm area to be treated. Todd Blessing
8/26/2008 Update or Other Action DEC staff issued a letter on August 26th requesting that ASIG hire a qualified person to construct a conceptual site model for the South Terminal, Anchorage International Airport. Todd Blessing
11/19/2010 Conceptual Site Model Submitted In response to the 8/26/08 request for a conceptual site model (CSM) by ADEC, ASIG/AFSC's consultant, Shannon & Wilson, completed and submitted an environmental document review and CSM dated October 14, 2010. The CSM identified potential for incidental soil ingestion pathway by construction workers if the soil is disturbed. Also the outdoor air pathway could be possible because contamination exists within 15 bgs, if the asphalt/concrete were removed. All other pathways are considered incomplete. Darren Mulkey
6/28/2013 Report or Workplan Review - Other Reviewed Environmental Management Inc.'s April 2013 request for closure. DEC requested EMI to provide additional details before we will consider site closure. Jacob Gano
9/25/2013 Site Visit ADEC staff conducted a site visit to observe the current land use and become familiar with the site. Meghan Dooley
5/8/2015 Meeting or Teleconference Held Site visit to the C Concourse site. Lisa Krebs-Barsis
7/25/2017 Meeting or Teleconference Held DEC Staff met with ASIG and consultant AECOM to discuss status of site and path forward. A letter dated September 22, 2017 documents the meeting and subsequent communications. The file for this site will be reviewed for status and potential closure. Wendy Hansen

Contaminant Information

Name Level Description Media Comments
DRO Other SoilGroundwater
GRO Other SoilGroundwater
BTEX Other SoilGroundwater

Control Type

Type Details
Other Commercial and Airside Remediation Management Zones as well as the Lake Hood shoreline are not a present or future drinking water source.

Requirements

Description Details
Groundwater Use Restrictions Any drinking water wells located on AIA property must be properly abandoned in accordance with ADEC decommissioning procedures within two years of this decision. AIA shall prohibit the installation of any water wells, used for drinking, cooling, washdown, or any other purposes, on the AIA either through 17 AAC 42.410 (b) (27) of the airport leasing regulations or in their individual lease agreement documents.

Missing Location Data

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