| Action Date |
Action |
Description |
DEC Staff |
| 2/8/2017 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 5/1/2018 |
Update or Other Action |
A site investigation work plan has been reviewed for the site. |
Danielle Duncan |
| 8/23/2018 |
Update or Other Action |
The vault lid and wheel are absent and the piping had been cut where the valve was. Found contaminated soil at the vault and bleeder from the surface to 4 ft. belowground. Groundwater was not encountered. |
Danielle Duncan |
| 10/4/2018 |
Update or Other Action |
The report is coming soon - found contamination. Going to have to get with the DOT re: a ramp for site access. |
Danielle Duncan |
| 10/11/2018 |
Site Characterization Report Approved |
Provided comments on the Site Inspection Report this date. Field screening samples (8) were collected at the vault and the area of cut pipe at depth intervals between zero and four feet (ft.) belowground and analyzed using a photoionization detector (PID). Four of these were sent to the laboratory and analyzed for gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), benzene, toluene, ethylbenzene, and xylenes (BTEX), 1, 2-dichloroethane (DCA), 1,2-dibromoethane (EDB), polycyclic aromatic hydrocarbons (PAHs), and lead. The results found petroleum contamination above the ADEC soil cleanup levels both the vault and the bleeder valve/area of the cut pipe. DRO contamination was observed at up to 2,700 milligrams per kilogram. Other fuel constituents such as EDB and some PAHs were also above cleanup levels. More investigation is needed to determine the extent of contamination.
|
Danielle Duncan |
| 10/11/2018 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 80034 name: Haines-Fairbanks Pipeline MP 357.25 - GV 46 |
Danielle Duncan |
| 11/5/2018 |
Update or Other Action |
Provided comments on the DRAFT 2018 Site Inspection Report this date. More investigation is needed at the site due to the presence of petroleum contamination. |
Danielle Duncan |
| 5/30/2019 |
Update or Other Action |
Additional work is planned for Gate Valve #46 in FY20 including a possible removal action. |
Danielle Duncan |
| 9/10/2021 |
Site Characterization Workplan Approved |
Approved final work plan received 9-2-21. The work plan proposes to conduct UVOST investigation (50 probes)advanced to 30 ft bgs. Correlation soil samples will be collected and analyzed for DRO, RRO, and GRO. Twelve soil characterization samples will be collected and analyzed for GRO, DRO, RRO, VOC, PAH, and total lead. Up to 3 temporary wells will be installed and sampled for GRO, DRO, RRO, VOC, PAH, and total lead. A transport form was signed to transport IDW to a temporary storage before disposal. |
Lisa Krebs-Barsis |
| 5/23/2022 |
Document, Report, or Work plan Review - other |
Supplemental Work Plan Addendum received April 27, 2022 reviewed and comments sent. The work plan includes up to 25 additional borings and 3 temporary monitoring wells. In the 2021 work the UVOST was not working but contamination more extensive than previously known was identified. Wells were not installed during the 2021 work either. |
Lisa Krebs-Barsis |
| 7/7/2022 |
Site Characterization Workplan Approved |
The Supplemental Work Plan Addendum was approved. The work plan includes up to 25 additional borings and 3 temporary monitoring wells. In the 2021 work the UVOST was not working but contamination more extensive than previously known was identified. Wells were not installed during the 2021 work either. |
Lisa Krebs-Barsis |
| 4/4/2023 |
Document, Report, or Work plan Review - other |
The 2021/2022 Draft Environmental Investigation Report was reviewed. Comments were sent. The purpose of the investigation was to conduct UVOST screening, soil sampling, permafrost evaluation, and groundwater sampling. A geophysical survey was also done. A new previously undocumented bleeder valve was observed (different from the one observed in 2018). The UVOST did not demonstrate good correlation to contaminants and use of UVOST was abandoned in favor of discrete samples collecting by drilling. Continuous permafrost was identified under the site ranging from 5 to 43 feet below ground surface. A total of 75 borings were completed and 59 primary samples were collected. Samples were collected between 4 and 43 feet deep. All soil samples were analyzed for GRO, DRO, and RRO. A smaller selection of samples were also analyzed for EDB, limited VOC, PAH, and lead. The highest concentrations of DRO and GRO detected were 1,180 mg/kg and 2,170 mg/kg, respectively. Several VOC and PAH were detected in excess of cleanup levels. Lead was detected in soil results but the maximum detection was 36.5 mg/kg, well below cleanup levels. Suprapermafrost groundwater was encountered between 25 and 30 feet bgs and and four temporary wells were installed. Flow direction was observed to be to the west-northwest. Groundwater samples were analyzed for GRO, DRO, RRO, EDB, limited VOC, PAH, and lead. In Temporary Wells TW01 and TW02 exceedances of 1,2-dibromomethane, 1,2-dichloroethane, benzene, ethylbenzene, and naphthalene were detected up to 0.426 µg/L, 3.24 µg/L, 12.1 µg/L, 39.3 µg/L, and 19.3 µg/L, respectively. |
Lisa Krebs-Barsis |
