Site Report: AIA Tanks #19, 20, 21
| Site Name: | AIA Tanks #19, 20, 21 |
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| Address: | 5740 De Havilland Avenue, Anchorage, AK 99501 |
| File Number: | 2100.26.596 |
| Hazard ID: | 26519 |
| Status: | Active |
| Staff: | Robert Burgess, 9074512153 robert.burgess@alaska.gov |
| Latitude: | 61.180557 |
| Longitude: | -149.994460 |
| Horizontal Datum: | WGS84 |
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We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.
Problems/Comments
In November 2015 during a routine inspection of three underground storage tanks (USTs) at the Ted Stevens Anchorage International Airport (AIA) Airfield Maintenance Facility, a remote fill system was observed to be incorrectly installed and suspected releases were discovered. In 2005 the tanks were retrofitted for remote fill. To accommodate new piping, the spill buckets were removed, piping was not correctly installed, and caps on the fill risers were not tightly sealed. Surface soil analytical samples collected from the manholes (formerly access to the spill buckets) of the three tanks confirmed releases had occurred at all of the tanks. From north to south, Tank 19, a 15,000-gallon diesel tank, Tank 21, an 8,000-gallon gasoline tank, and Tank 20, another 15,000-gallon diesel tank had concentrations of diesel, benzene, and diesel, respectively, that exceeded migration to groundwater cleanup levels. The Airfield Maintenance Facility is in the Airside Risk Management Zone of TSAIA which is subject to an 18 AAC 75.350 determination prohibiting the use of groundwater as drinking water.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 2/11/2016 | Site Added to Database | A new site has been added to the database | Evonne Reese |
| 2/11/2016 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST site created in CSP database for source area Tanks #19, 20, 21, 79877 | Evonne Reese |
| 2/11/2016 | Document, Report, or Work plan Review - other | Shallow material in the manholes associated with the three tanks was field-screened and sampled for RRO, DRO, GRO, and BTEX. Analytical results indicated releases near the fill risers of each of the tanks. A sample collected from Tank 20 (15,000-gallon diesel tank), contained 4,410 mg/kg DRO. A sample collected from Tank 19 (15,000-gallon diesel tank), contained 2,760 mg/kg DRO. A sample collected from Tank 21 (8,000-gallon gasoline tank), contained 0.047 mg/kg benzene. Subsurface and groundwater samples were not collected. | Lisa Krebs-Barsis |
| 2/11/2016 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79877 name: Tanks #19, 20, 21 | Lisa Krebs-Barsis |
| 9/30/2016 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | Administrative action addition for grant reporting purposes. | Evonne Reese |
| 6/22/2018 | Update or Other Action | A project was scheduled for 2018 to address these tanks at which time further site investigation was to be performed to determine extent of contamination. This project has been delayed a year. Staff requested that a work plan be submitted prior to conducting the site activities, and that screening and sampling be performed by a QEP. | Wendy Hansen |
| 10/11/2019 | Document, Report, or Work plan Review - other | Staff reviewed the report for construction project ANC Miscellaneous Repairs and Fleet Fueling Facility Project written by Tellus for Roger Hickel Contracting, Inc (RHC). The project entailed replacing four tank sump covers. Approximately 5 cubic yards of contaminated soil was removed and approved for transport to the AIA landspreading area on June 4, 2019. DRO was detected in the soil above cleanup levels at 1,400 mg/kg. No confirmation samples were collected after soil removal. | Wendy Hansen |
| 10/14/2019 | Update or Other Action | Staff issued letter to Ted Stevens Anchorage International Airport stating that further site characterization is needed for closure. The letter was in response to an August 7 request to close the site based on the Field Summary Report provided by Tellus, Inc. in support of the ANC Miscellaneous Repairs and Fleet Fueling Facility Project. | Wendy Hansen |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.