| Action Date |
Action |
Description |
DEC Staff |
| 6/19/2019 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 6/27/2019 |
Update or Other Action |
Per the CBJ and their consultant, a drinking water well search is underway using both water billing records and public outreach. Target areas include all residences and businesses within 1/2 mile radius of the site. |
Danielle Duncan |
| 6/28/2019 |
Potentially Responsible Party/State Interest Letter |
Sent today to the CBJ. |
Danielle Duncan |
| 7/1/2019 |
Site Characterization Report Approved |
Approved the PFAS Preliminary Site Investigation Report, dated June 2019 and prepared by Cox Environmental Services (CES). The investigation involved the installation of seven soil borings that were completed as groundwater monitoring wells using a Geoprobe drill. The results of the investigation found PFAS contamination (PFOS specifically) in soil above default ADEC cleanup levels in all of the boreholes with the exceptions of BH-1, BH-2, and BH-3; these boreholes were located farthest away from the release area(s). The groundwater sampling results found PFAS contamination in all of the wells to varying degrees. The ADEC groundwater cleanup level for PFOS (400 ng/L) was exceeded in MW3 through MW-7. The highest reported PFOS value was 11,000 ng/L in MW-6 located near the fire draft pond. The other PFOS values were a factor of ten lower. The ADEC groundwater cleanup level for PFOA (400 ng/L) was not exceeded for any wells and the maximum reported PFOA concentration in groundwater was 320 ng/L. The LHA was exceeded in all of the wells with the exception of MW-1 located near the southwest corner of the site, with results ranging from 350 ng/L to 11,000 ng/L. The groundwater PFAS contamination was dominated by PFOS at concentrations up to 11,000 ng/L. The secondary contaminant (having the second highest concentration) was perfluorohexanesulfonic acid (PFHxS) having a maximum concentration of 2,100 ng/L. |
Danielle Duncan |
| 7/1/2019 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 80472 name: CBJ Hagevig Fire Training Center PFAS |
Danielle Duncan |
| 7/11/2019 |
Update or Other Action |
CES will be going door-to-door determining whether anyone is using groundwater in the area beginning today. |
Danielle Duncan |
| 7/29/2019 |
Update or Other Action |
Per Cox Environmental and the CBJ, everyone in the site area is connected to municipal water. A few historic wells were identified but were not in use. The door-to-door effort is complete and letters will be sent out to residents who may not have been reached in person. The CBJ has put a Request for Proposals for continuing work. |
Danielle Duncan |
| 9/5/2019 |
Potentially Responsible Party/State Interest Letter |
Sent today to the Fire/Life Safety Director’s Office State of Alaska.
|
Danielle Duncan |
| 12/31/2019 |
Document, Report, or Work plan Review - other |
Received and reviewed the Expanded Investigation – PFAS Sampling and Analysis Plan (SAP), dated December 2019. The objective of the proposed work is to better characterize the release. The work plan was approved with the condition that the full suite of PFAS compounds from 537 are reported.
|
Joshua Barsis |
| 11/17/2020 |
Document, Report, or Work plan Review - other |
On November 17, 2020 ADEC received the draft “PFAS Groundwater Monitoring Report Hagevig Fire Training Center” dated September 2020. The report summarizes groundwater sampling results related to PFAS contamination. |
Rachael Petraeus |
| 1/13/2021 |
Document, Report, or Work plan Review - other |
On January 12, 2021 ADEC received the draft "PFAS Site Investigation Report Hagevig Fire Training Center" dated September 2020. The report summarizes results of soil and groundwater sampling activities at the Hagevig Fire Training Center. |
Rachael Petraeus |
| 3/9/2021 |
Site Characterization Report Approved |
On March 09, 2021 ADEC approved "PFAS Site Investigation Report Hagevig Fire Training Center" dated September 2020. The report summarizes results of soil and groundwater sampling activities at the Hagevig Fire Training Center. |
Rachael Petraeus |
| 12/28/2021 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 80472 CBJ Hagevig Fire Training Center PFAS. |
Rachael Petraeus |
| 10/21/2022 |
Document, Report, or Work plan Review - other |
The ADEC received the "Continued Expanded Investigation - PFAS Sampling and Analysis Plan (SAP", dated July 2022, on September 20, 2022. The work plan aims to undertake additional groundwater and soil characterization work at the site to delineate contamination. The ADEC reviewed the report and provided the consultants with comments. The work plan will be updated before being re-submitted for approval. |
Flannery Ballard |
| 11/30/2022 |
Document, Report, or Work plan Review - other |
The ADEC received a response to comments 11/21/22, and provided a response this date. A final version of the work plan will be provided to the ADEC for approval. |
Flannery Ballard |
| 1/27/2023 |
Site Characterization Workplan Approved |
The ADEC approved the 2023 "Continued Expanded Investigation – PFAS Sampling and Analysis Plan (SAP)”, dated July 2022. The work plan proposes to install 12 new monitoring wells to further delineate groundwater contamination at the site. All new and existing wells will be sampled for PFAS compounds using method 537.1. A site characterization report will be submitted to the department following completion of groundwater monitoring events. |
Flannery Ballard |
