| Action Date |
Action |
Description |
DEC Staff |
| 8/11/1993 |
Site Added to Database |
GRO and DRO contamination. |
Former Staff |
| 10/20/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 5/15/2000 |
Update or Other Action |
Changed site name from Skwenta to FAA Skwentna. File review needed as ranking does not appear to be accurate. |
Eileen Olson |
| 11/7/2000 |
Site Ranked Using the AHRM |
Changed Population Proximity Value from 0.5 to 1.0, Groundwater Usage Value from 0.8 to 1.0, lowered Air Exposure Index Value from 0.2 to 0.1. |
Bruce Wanstall |
| 1/14/2002 |
Update or Other Action |
Corrected database status from inactive to active. |
Elizabeth Stergiou |
| 7/22/2004 |
Meeting or Teleconference Held |
Meeting held with FAA to discuss 2004 work scheduled for Skwentna. |
Anne Marie Palmieri |
| 8/5/2004 |
Site Characterization Workplan Approved |
Comments given on the draft workplan. Workplan will be approved when the activities regarding the dump are added. |
Anne Marie Palmieri |
| 2/18/2005 |
Site Ranked Using the AHRM |
Site reranked with info from draft RI report. |
Anne Marie Palmieri |
| 2/18/2005 |
Update or Other Action |
Staff reviewed and commented on draft RI. DRO contamination was found in the soil and groundwater (16 mg/L); estimated soil volume is 102 cy. |
Anne Marie Palmieri |
| 10/25/2005 |
Cleanup Level(s) Approved |
DEC approves ACLs based on site-specific concentrations of fractional organic carbon: GRO - 397 mg/kg and DRO - 351 mg/kg. |
Anne Marie Palmieri |
| 6/8/2007 |
Exposure Tracking Model Ranking |
ETM ranking |
Anne Marie Palmieri |
| 2/9/2011 |
Update or Other Action |
ADEC recieved a Draft report for the cleanup of the dump and other sites at the FAA Skwentna Air Station. |
Jonathan Schick |
| 6/10/2011 |
Update or Other Action |
ADEC staff submitted numerous comments on the Draft Report detailing the removal of impacted soils at the dump site and around the Skwentna Air Station. Overall the report required thorough revisions to make it more readable and consistent. Also additional characterization and cleanup work remains at the sites and the recommended site closures from the report were not accepted by ADEC. |
Jonathan Schick |
| 6/13/2011 |
Update or Other Action |
ADEC recieved an email from the FAA remedial project manager informing us that the report was going to be rejected and another draft will be submitted. |
Jonathan Schick |
| 12/29/2011 |
Document, Report, or Work plan Review - other |
Contaminated SItes Staff recieved a revised Draft version of the RemedialAction Cleanup Summary Report Demolition and Remediation of the Former FAA Air Station for Skwentna Air Station in our office for review. The report details the excavation and removal of solid waste from the eroding landfill in Skwentna as well as investigations of several other sites associated with the Air Station. |
Jonathan Schick |
| 2/1/2012 |
Document, Report, or Work plan Review - other |
Contaminated Sites Staff submitted a letter to the remedial project manager at the FAA for the Draft Remedial Action Cleanup Summary Report for the Skwentna Air Station. ADEC has concerns about the adequacy of the cleanup effort at the dump site as well as the need to collect analytical samples to characterize several other sites associated with the Air Station. Comments were submitted within the letter and address the State's concerns with the report. |
Jonathan Schick |
| 11/28/2012 |
Document, Report, or Work plan Review - other |
Draft landfill cleanup report received |
Fred Vreeman |
| 3/12/2013 |
Update or Other Action |
Site assigned to Jessica Morris |
Fred Vreeman |
| 8/8/2013 |
Site Characterization Workplan Approved |
The ADEC Contaminated Site Program approved the 2013 Final Work Plan FAA Site Investigation, FAA Station Skwentna, Alaska. The proposed work included investigations at the Non-Directional Beacon (NDB) Bulk Fuel Area, Simultaneous Broadcast Range with Adcock Antenna (SBRA) Range Building, Control Tower (CT) Building, Dump Number 1, Shop Drum Area, Pesticide Sprayer Area, and the NDB Drum Pond Area. |
Jessica Morris |
| 12/23/2014 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 72482 sbra. |
Jessica Morris |
| 12/29/2014 |
Site Characterization Report Approved |
The ADEC Contaminated Site Program approved the 2014 Final Site Investigation and Hydrocarbon Risk Calculator Report for the, FAA Station Skwentna, Alaska. 26 UVOST probes, 15 soil boring, and 22 analytical soil samples were collected from the site. DRO and PAH was detected at the site in an area approximately 35 feet in length from 4 to 8 feet bgs. 4 groundwater monitoring wells were installed at the site, and no contamination were detected in the groundwater samples above the ADEC Table C cleanup levels. Removal of the soil source area contamination was recommended for this site. |
Jessica Morris |
| 9/8/2016 |
Meeting or Teleconference Held |
A project meeting was held to discuss the soil sampling results for the pesticide background sampling. In order to move on to the cleanup portion of this project, we will need to agree on soil and sediment cleanup levels that are protective of all pathways and receptors. |
Jessica Morris |
| 7/16/2019 |
Update or Other Action |
Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map. |
Rebekah Reams |
| 4/24/2020 |
Document, Report, or Work plan Review - other |
Approved remainder of workplan for work occurring in 2020 and 2021 field seasons. |
Michael Hooper |
| 8/30/2022 |
Document, Report, or Work plan Review - other |
Approved interim remedial action report for phases one through three of the remedial action project, ADEC will issue final recommendations and comments upon review of the final project reporting next year. |
Michael Hooper |
| 6/15/2023 |
Site Visit |
Visited Deshka Landing to address community concerns about soils coming from the Skwentna cleanup. |
Michael Hooper |
