| Action Date |
Action |
Description |
DEC Staff |
| 10/7/1992 |
Update or Other Action |
(Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Sent NOR letter to FAA. |
Don Gibler |
| 2/23/1993 |
Update or Other Action |
(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning the contaminated site. RP responded with corrections on ADEC site report. |
Jeff Peterson |
| 4/1/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 1/25/1994 |
Site Added to Database |
Diesel and gasoline tank removal. |
Former Staff |
| 9/29/1994 |
Update or Other Action |
(Old R:Base Action Code = TECH - Technical Assistance). Consulted with Larry Acomb, consultant for Northway LUST project, regarding CAP. He stated permafrost will not affect air sparging, soils are not as fine as initially thought; they will adjust blower to force more air through soils. Mounding not a problem, product is old with low solubility. VOCs are estimated to be low, probably won't do fertilizer and no studies are planned for microbes. Stated project will begin next May 1995. Subsequently sent letter further addressing ADEC concerns over this remediation plan. |
Jackie Dupee |
| 10/5/1994 |
Update or Other Action |
Reviewed and updated file. |
Jackie Dupee |
| 10/17/1994 |
Site Characterization Report Approved |
(Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Reviewed Harding Lawson Associates Release Investigation dated 05/20/93. Extensive groundwater and soil contamination. Addressed contamination in letter dated 10/17/94 concerning RI and CAP. |
Jackie Dupee |
| 10/17/1994 |
Update or Other Action |
(Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Reviewed Corrective Action Plan dated 04/20/94. Sent letter dated 10/17/94 requesting additional information on proposed remediation plan not contained in CAP. |
Jackie Dupee |
| 9/1/1999 |
Update or Other Action |
ADEC file review and letter summarizing additional Department requirements. |
Eileen Olson |
| 11/10/1999 |
Meeting or Teleconference Held |
Met with FAA staff and consultant to discuss department review of plan received November 3rd; due to short time frame was not able to complete review before work begun. Department staff requested additional borings and characterization work. |
Eileen Olson |
| 9/18/2002 |
Update or Other Action |
Sent letter requesting groundwater monitoring for all existing wells on site, with a schedule of monitoring to be submitted by March 31, 2003 and the monitoring to be complete by June 30, 2003. |
Elizabeth Stergiou |
| 9/19/2002 |
Update or Other Action |
Sent general letter requesting the following documents be submitted by 10/1/02: remedial action report for work completed in 2000. |
Elizabeth Stergiou |
| 9/4/2003 |
Update or Other Action |
ADEC approved the workplan for the Fall 2003 Sampling and Analysis Plan for various sites. |
Deborah Williams |
| 6/20/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Kim DeRuyter |
| 11/4/2015 |
Update or Other Action |
Site management reassigned to Carnahan. |
John Carnahan |
| 4/18/2017 |
Update or Other Action |
Letter sent to FAA requesting information on status of the investigations at these sites. |
John Carnahan |
| 3/6/2019 |
Workplan Requested |
Sent letter requesting GW monitoring at this site for both high and low water periods in 2019. Set request for scheduling response by May 1, with work plan submitted for approval prior to field work commencement. |
John Carnahan |
| 8/6/2019 |
Document, Report, or Work plan Review - other |
DEC approved the Final Work Plan, FAA NDB Site Release Investigation, Northway, Alaska Dated August 2019. Work proposed for August 2019 at the NDB site includes a series of soil borings to identify the horizontal and vertical extent of historic storage tank-derived petroleum contamination in soil. The soil will be screened using a PID and FROG-4000 instrument, and 10-15 soil samples will be collected and sent to a laboratory for analytical results. Up to four new groundwater monitoring wells will be installed, depending on the usability of wells already in place onsite. Previous wells that are not able to be used will be decommissioned. Groundwater samples will be collected and sent to a laboratory for analytical results in order to delineate groundwater contamination at the site. Finally, five soil samples will be collected at a former transformer pad to determine if PCB contamination is present. |
Kevin Fraley |
| 1/24/2020 |
Document, Report, or Work plan Review - other |
DEC approved the Final Report, FAA NDB Site Release Investigation, Northway, Alaska Dated January 2020. Sample results from the former transformer pad indicated PCB contamination is not present. Three soil boring samples from the former storage tank location showed petroleum contaminant exceedances of DEC migration to groundwater cleanup levels, and one monitoring well exhibited an exceedance of the groundwater cleanup level for ethylbenzene. However, the Hydrocarbon Risk Calculator indicates that risk to human health and the environment is likely within acceptable levels at the site, when site-specific soil and groundwater characteristics are factored in.
|
Kevin Fraley |
| 6/10/2021 |
Document, Report, or Work plan Review - other |
DEC sent comments on the draft 2021 RI and GWM WP. The Radio Range Tower, Power Plant Building, Water Treatment Building, and CAA Former Garage building will have work done at their locations.
Surface soils and surface water will be sampled for lead and PCBs at the Radio Range Tower. Existing groundwater wells will be sampled for GRO, DRO, VOCs, PAHs at the PPB and WTB AOCs. At the Garage AOC, soil borings and groundwater monitoring wells will be installed and sampled and run for all POL CoCs, with the addition of EPH and VPH for use in HRC calculations. |
Tim Sharp |
| 6/18/2021 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 72670 NDB Beacon Gasoline UST. |
Tim Sharp |
| 8/30/2021 |
Site Characterization Workplan Approved |
ADEC approved the Final RI and GWM WP for the FAA Northway sites. Soil borings and monitoring wells will be installed and sampled at the CAA Garage AOC, and the HRC will be used to assess if the contaminants exceed risk criteria. Surface soils and surface water will be sampled for lead and PCBs at the Former Radio Range Tower and other groundwater wells will be sampled at other AOCs for GRO, DRO, VOCs, and PAHs. |
Tim Sharp |
| 5/5/2022 |
Document, Report, or Work plan Review - other |
ADEC sent comments on the 2021 Draft RI and Groundwater Monitoring Report for FAA Northway Station. The report details efforts to characterize and monitor contamination at several areas of concern (AOCs). Soil borings and monitoring wells were installed and sampled at the Former Civil Aeronautics Administration (CAA) Garage AOC, also known as the Basketball Court site. The Hydrocarbon Risk Calculator (HRC) was used to assess remaining risk criteria.
Surface soils were sampled for lead and polychlorinated biphenyls (PCBs) at the Former Radio Range Tower AOC. Groundwater monitoring was conducted at five other AOCs. |
Tim Sharp |
| 10/24/2022 |
Update or Other Action |
On October 21, 2022 ADEC approved the Final Remedial Investigation and Groundwater Monitoring Report |
Alyssa Wood |
