| Action Date |
Action |
Description |
DEC Staff |
| 9/1/1992 |
Preliminary Assessment Approved |
Draft Site Investigation. Recommended NFA at the site. Recommended and expanded site investigation to determine extent of POL contamination at former bulk fuel storage site (now managed by the USFS). |
Former Staff |
| 8/26/1993 |
Site Added to Database |
Multiple contaminants. |
Former Staff |
| 11/10/1994 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 1/15/1997 |
Update or Other Action |
(Old R:Base Action Code = NFA - No Further Action Required (CERCLA)). |
Former Staff |
| 7/12/2001 |
Update or Other Action |
Received the June 2001 Natural Attenuation Monitoring Report. |
Elizabeth Stergiou |
| 1/14/2002 |
Update or Other Action |
Corrected status from inactive to active. |
Elizabeth Stergiou |
| 6/20/2007 |
Exposure Tracking Model Ranking |
ETM ranking |
Anne Marie Palmieri |
| 5/26/2011 |
Update or Other Action |
Site management transferred to Fred Vreeman. |
Anne Marie Palmieri |
| 8/2/2013 |
Site Characterization Workplan Approved |
Characterization and limited remediation plan approval with directed comments. FAA will characterize multiple AOCs and delineate landfills at site. |
Fred Vreeman |
| 8/23/2013 |
Meeting or Teleconference Held |
Meeting with North Wind contractors and FAA to clarify workplan comments. One mobilization intended for characterization and long term monitoring well placement. ADEC requires on board meeting or site work visit and/or review prior to final well placement decisions. |
Fred Vreeman |
| 4/15/2014 |
Site Characterization Workplan Approved |
Final Draft Site Investigation and Limited Removal Action work plan approved. The Final draft of the Work Plan was received on 12/1/2013. |
Fred Vreeman |
| 6/16/2015 |
Update or Other Action |
DEC received the site investigation and remedial action report. |
Monte Garroutte |
| 12/10/2015 |
Meeting or Teleconference Held |
DEC staff attended a meeting with FAA PM Raymore to discuss the responses to comments for the Duncan Canal HRC report. All responses were resolved during the meeting. DEC will follow up with official submittal of RTC responses. |
Monte Garroutte |
| 12/20/2017 |
Document, Report, or Work plan Review - other |
Review and comments provided for Remedial Action Report detailing near surface excavation activities at Building 202, Building 609, and Building 609 Waste Disposal Area and an in-situ chemical oxidization treatment of soils at Building 609. 120 CY of contaminated soil was excavated. Some DRO remains at these AOCs. |
Gretchen Caudill |
| 1/2/2018 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on – Draft Remedial Action Addendum Report. This addendum to the Remedial Action Report describes the evaluation of DRO in soil within an ISCO treated area, the installation of a replacement monitoring well in the same area, and the monitoring of groundwater from a total of three monitoring wells. Remediation with RegenOx was successful in reducing DRO in soils below the MAC of 12,500 mg/kg at 5 feet below ground surface with concentrations ranging 1,140–6,630 mg/kg. Groundwater samples from the replacement well showed elevated DRO and RRO concentrations at 10.7 and 3.26 mg/L, respectively, which is increased from the measured 2014 concentrations. |
Gretchen Caudill |
| 4/18/2018 |
Document, Report, or Work plan Review - other |
DEC Approval –Final Remedial Action Report, Former Duncan Canal FAA Station, January 2018 AND
Final Remedial Action Report Addendum, Former Duncan Canal FAA Station, January 2018. DEC concurs with the recommendations to continue follow up soil sampling in the ISCO-treated area and to monitor groundwater at Building 609 as Building 609 is the area with bulk of DRO contamination remaining. |
Gretchen Caudill |
| 9/5/2018 |
Document, Report, or Work plan Review - other |
DEC Approval – Final Work Plan Addendum for Follow-up Assessment Sampling. This work plan addendum details the second round of follow-up sampling to assess the effectiveness of applying ISCO to soil and groundwater in the vicinity of where DRO concentrations exceeded the maximum allowable concentration at former Building 609. Field work will entail collecting four soil samples to analyze for DRO and four groundwater samples to analyze for DRO, RRO, and BTEX. |
Gretchen Caudill |
| 5/2/2019 |
Document, Report, or Work plan Review - other |
DEC Approval provided - 2018 Remedial Monitoring Report - Former FAA Duncan Canal Station. Significant soil and groundwater contamination remains at and adjacent to the former Building 609 ISCO treated area. The upgradient monitoring wells showed significant and increased DRO and RRO. DEC approved the report, but did not concur with the provided recommendations. Additional groundwater monitoring should be conducted to further elucidate the contamination found in the upgradient well. In contrast to the recommendations provided in the report, DEC requests annual monitoring of groundwater at this site. Installation of additional monitoring well(s) may be warranted and analysis of volatile organic compounds should be added into future groundwater efforts. Additionally and also in contrast to the recommendations provided in the report, DEC may require additional soil sampling to reach the depth of prior MAC exceedances. |
Gretchen Caudill |
| 1/7/2021 |
Site Characterization Workplan Approved |
DEC Approved the Final Release Investigation Work Plan. Six soil borings will be advanced, two monitoring wells will be installed, and all monitoring wells will be sampled at the Bldg 609/407 location. A bench-scale study is also planned to compare RegenOx and Klozur remediation effects at the site. Soil borings will attempt to both horizontally and vertically characterize the site and verify if remaining contamination is above MAC levels. All samples will be analyzed for DRO, GRO, RRO, and VOCs including BTEX compounds. |
Tim Sharp |
| 2/9/2021 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 80738 name: Building 609 Transformer Pad |
Tim Sharp |
| 2/9/2021 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 80739 name: Standby Generator (Building 608) |
Tim Sharp |
| 2/12/2021 |
Update or Other Action |
DEC issued a NFA Determination for the Building 609 Transformer Pad AOC and Building 608 AOC. All PCB contaminated soil was removed from the Transformer Pad Area and remaining contamination at Building 608 was below Method 3 migration to groundwater cleanup levels approved by DEC. |
Tim Sharp |
| 1/31/2022 |
Document, Report, or Work plan Review - other |
DEC sent comments on the Draft 2021 RI Report, which details soil and groundwater sampling in the impacted area of Former Buildings 407 and 609. Additionally, soil and groundwater collected was treated with RegenOx® and Klozur® in a bench-scale study to compare remediation effectiveness. Groundwater samples were analyzed for GRO, DRO, RRO, and VOCs, while soil samples were analyzed for DRO and RRO.
Soil samples showed DRO concentrations above MtG CULs in two locations. Groundwater samples contained DRO and naphthalene above Table C in three wells. In the bench-scale study, RegenOx reduced contamination in soil by a greater percentage than Klozur. The report recommends continued groundwater monitoring on a yearly basis, and treatment with RegenOx to remediate contamination. Comments mainly constituted questions about the bench study validity.
|
Tim Sharp |
| 3/31/2022 |
Document, Report, or Work plan Review - other |
DEC approved the Final 2021 Release Investigation Report. FAA plans to continue groundwater monitoring and will begin treating contaminated soil and groundwater with RegenOx given the results of the bench-scale study. |
Tim Sharp |
| 11/17/2022 |
Document, Report, or Work plan Review - other |
DEC submitted comments on the draft workplan, Duncan Canal Long Term Monitoring Petersburg, Alaska that details groundwater, pore water, and sediment sampling methods as part of the long-term monitoring project at the former FAA Duncan Canal Radio Relay Station. Groundwater samples from 12 existing monitoring wells will be analyzed for gasoline-range organics, volatile organic compounds, diesel range organics, and residual range organics (GRO, VOCs, and DRO/RRO). Additionally, pore water and sediment samples will also be analyzed for GRO, VOCs, and DRO/RRO from four beach locations during low tide to assess potential migrating contamination through groundwater seepage. Comments were few and focused on clarification language and GAC procedures. |
Alyssa Wood |
| 1/27/2023 |
Document, Report, or Work plan Review - other |
ADEC received the draft workplan, Duncan Canal Long Term Monitoring Petersburg, Alaska on October 24, 2022. The report details groundwater, pore water, and sediment sampling methods as part of the long-term monitoring project at the former FAA Duncan Canal Radio Relay Station. ADEC provided comments on a draft of this submission on November 16, 2022. A final work plan addressing all of DEC’s comments was approved on January 23, 2023.
|
Alyssa Wood |
| 1/29/2024 |
Document, Report, or Work plan Review - other |
ADEC approved the final Long Term monitoring report for Duncan Canal. The report detailed groundwater, pore water, and sediment sampling results as part of the long-term monitoring assessment at the former FAA Duncan Canal Radio Relay Station.
|
Alyssa Wood |
| 9/30/2024 |
Document, Report, or Work plan Review - other |
DEC sent comments on the 2024 Long Term Monitoring and Soil Sampling work plan. |
Jennifer McGrath |
