| Action Date |
Action |
Description |
DEC Staff |
| 3/27/2012 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 3/27/2012 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79276 name: AFSC Kilo Gates Hydrant System |
Mitzi Read |
| 3/28/2012 |
Potentially Responsible Party/State Interest Letter |
DEC staff issued a potential responsible party letter to Amber Deem on March 28, 2012. |
Todd Blessing |
| 10/22/2012 |
Update or Other Action |
DEC staff approved of Transnorthern's request to construct a building with a 6 mil vapor barrier. Staff inspected site and evaluated photo's of the vapor barrier. |
Todd Blessing |
| 1/24/2013 |
Update or Other Action |
DEC staff reviewed and approved of URS work plan titled "Additional Forensic Sampling AFSC Kilo Gates Hydrant System/Former Plant 4". URS proposed to conduct additional forensic soil sampling analysis to suppliment forensic samples collected in 2011. Up to 10 soil borings will be installed near the abandoned pipeline. Samples will be collected based on field screening and analyzed for Soil samples will be submitted to the laboratory for Gasoline Range Organics (GRO), Extractible Petroleum Hydrocarbons (EPH) to include C11-C22 aromatic hydrocarbons, and Poly Aromatic Hydrocarbon (PAH) analyses. Samples will be analyzed using Ultra Violet Fluorescence (UVF) technology, similar to the Ultra Violet Optical Screening Tool (UVOST) system use during the initial investigation at the Kilo Gates site in 2011. These samples will be compared to a raw fuel sample to determine whether the currently used fuel is a potential source for contamination in that area. The samples will also be used to compare to the full forensic analytical samples collected from each boring. Samples will be analyzed by UVF-3100D and TD-500 analyzers, by Site-Lab of Newbury, Massachusetts |
Todd Blessing |
| 9/25/2013 |
Site Visit |
ADEC staff conducted a site visit to observe the current land use and become familiar with the site. |
Meghan Dooley |
| 1/6/2017 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79276 AFSC Kilo Gates Hydrant System. |
Darren Mulkey |
| 1/6/2017 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79276 AFSC Kilo Gates Hydrant System. |
Darren Mulkey |
| 7/25/2017 |
Meeting or Teleconference Held |
DEC Staff met with ASIG and consultant AECOM to discuss status of site and path forward. A letter dated September 22, 2017 documents the meeting and subsequent communications. In 2011 and 2012, petroleum contamination was identified in the vicinity of an AFSC fuel pipeline during pre-construction assessment activities associated with the Guardian Flight building. Forensic analyses performed in 2013 confirmed the presence of Jet A. Reports relevant to the site discovery were provided to ASIG and AECOM on July 28, 2017. A work plan was requested to determine the nature and extent of contamination, to include analysis for GRO, DRO, VOCs (including BTEX), and PAHs. |
Wendy Hansen |
| 7/12/2019 |
Document, Report, or Work plan Review - other |
Staff reviewed draft site characterization work plan. The plan was written by AECOM and included installation of 8 soil borings, to be converted to monitoring wells for long term monitoring. Up to two soil samples are planned for collection from each boring. Groundwater samples will be collected for each newly installed well where there is no free product present. Well MW-14 will also be sampled, under the long term monitoring program for the AFSC Plant 4 site. Sample collection times between the Kilo Gates and Plant 4 sites will be coordinated in order to minimize temporal variability. Soil samples will be analyzed for GRO and DRO. At least one sample from each boring will also be analyzed for VOCs and PAH. Groundwater samples will be analyzed for GRO, DRO, VOC and PAH. |
Wendy Hansen |
| 7/24/2019 |
Document, Report, or Work plan Review - other |
Staff approved final site characterization work plan. All comments were adequately addressed. |
Wendy Hansen |
| 1/28/2020 |
Offsite Soil or Groundwater Disposal Approved |
Staff approved for transport of less than 550 gallons of well investigation derived waste water generated from AFSC-Former Plant #4 and this site to be treated at the US Ecology Viking Drive facility in Anchorage. In addition to petroleum constituents, the water potentially contained PFAS based on a composite sample collected of water from four Menzies Aviation sites, this site, AFSC - Former Plant #4 Hazard ID 23582, AFSC AIA Former Bulk Fuel Tank Farm Hazard ID 2742, and AFSC AIA North Terminal Hazard ID 595. |
Wendy Hansen |
| 1/28/2020 |
Offsite Soil or Groundwater Disposal Approved |
Staff approved for transport of less than 440 gallons of soil investigation derived waste generated during well installation activities to be transported to US Ecology in Idaho. |
Wendy Hansen |
| 7/14/2021 |
Site Characterization Workplan Approved |
ADEC provided email approval to proceed with groundwater monitoring of 8 wells for DRO, GRO, VOCs and PAHs in accordance with the 7/2019 Kilo Gates Hydrant System work plan. |
Shawn Tisdell |
| 7/29/2022 |
Site Characterization Report Approved |
Staff reviewed and approved a site characterization report providing a summary of groundwater monitoring activities between 2019 and 2021. Field activities in 2019 occurred in October and November and consisted of soil boring to install 7 monitoring wells. Soil and groundwater samples were collected. Field activities in July 2021 included groundwater sampling. Wells KW-1 and KW-2 were located in areas with the highest potential for remaining free-product, however no free product was observed in 2019 or 2021. The report has been added to the database. |
Shawn Tisdell |
