| Action Date |
Action |
Description |
DEC Staff |
| 12/22/1999 |
Site Added to Database |
Diesel. |
Eileen Olson |
| 1/24/2000 |
Site Ranked Using the AHRM |
Initial ranking. |
Eileen Olson |
| 3/16/2000 |
Update or Other Action |
Received groundwater monitoring development of ACL document. |
Eileen Olson |
| 5/9/2000 |
Update or Other Action |
Changed site name so it is preceded by ANC. |
Eileen Olson |
| 5/9/2000 |
Site Ranked Using the AHRM |
Changed GW Usage Value from 0.4 to 0.8. |
Eileen Olson |
| 7/7/2000 |
Site Ranked Using the AHRM |
Changed the Population Proximity Value from 0.5 to 1 as there are occupied buildings within 500’. |
Former Staff |
| 8/9/2000 |
Site Ranked Using the AHRM |
Changed Groundwater Exposure Index Value to 1 from 0.4 as groundwater is reportedly contaminated. |
Eileen Olson |
| 7/6/2001 |
Site Characterization Workplan Approved |
Approval of plan to further assess the groundwater contamination. |
Renee Evans |
| 9/12/2001 |
Update or Other Action |
Received report on workplan actions. Additional investigative work planned at site. Awaiting AIA Risk Management Plan results and GW Use Determination. Must then decide if additional free product recovery is needed. |
Renee Evans |
| 12/21/2004 |
Update or Other Action |
Submitted letter addressed to Laurie Butler requesting site characterization plan and free product recovery reports completed from 2002 to 2004. |
Todd Blessing |
| 3/29/2005 |
Update or Other Action |
Discussed the status of a monitoring well on-site that is in need of repair and or decommissioning with Amber Mandt, the new environmental manager of ASIG sites. |
Todd Blessing |
| 4/20/2005 |
Update or Other Action |
Approved of plan to decommission well OW-2. |
Todd Blessing |
| 7/7/2005 |
Update or Other Action |
Reviewed and approved a Work Plan dated June 24, 2005 to conduct a site assessment. Within the work plan, URS Inc. proposes to sample groundwater from ten existing monitoring wells to be analyzed for petroleum constituents; evaluate the presence and thickness of petroleum product in site wells; evaluate the groundwater elevations to determine current groundwater flow direction; and treat investigative derived waste at responsible party's treatment facility. In addition, groundwater samples collected from wells MW-3, MW-5, and MW-7 will be analyzed for glycol and alcohol by EPA method 8015 (modified). |
Todd Blessing |
| 11/4/2005 |
Update or Other Action |
Recently reviewed the site assessment report for Federal Express Vault Site, which was received by the Department on October 4, 2005. The site assessment report documented the July sampling and analysis of groundwater for petroleum constituents and alcohol based deicer fluids at the Federal Express Vault site. Groundwater elevations were evaluated from a majority of the monitor wells in order to determined the local groundwater flow direction. The following can be concluded following a review of the site assessment report:
Groundwater elevation data at the time of sampling suggests that groundwater is generally flowing southwest;
Free phase product is present in two monitor wells (MW-3, MW-5 and MW-7);
The levels of dissolved phase petroleum constituents (i.e. GRO, DRO, and benzene) measured in 7 monitor wells exceed 18 AAC 75.345 Table C values;
The extent of groundwater contamination has yet to be defined; and
The presence of deicer fluid in groundwater may be contributing to the elevated levels of measured DRO
Submited a letter to ASIG requesting that ASIG submit a letter to the Department that discusses the following issues:
The treatment and disposal of investigative derived waste generated during the July 2005 groundwater monitoring event;
Prevailing scientific literature or test data that supports or refutes the assertion that the presence of deicer fluids may contribute to elevated measurements of DRO; and
The decommissioning of damaged monitoring wells |
Todd Blessing |
| 5/8/2006 |
Update or Other Action |
Reviewed and approved of to decommission and replace all on-site monitor wells in support of taxiway improvement project at ANC. The well decommissioning plan was received by the Department on May 8, 2006. Under the plan, thirteen monitor wells will be decommissioned by filling the well casing and bore hole with bentonite slurry. The top five feet of the well bore hole will also be filled with clean structure material. |
Todd Blessing |
| 7/10/2006 |
Update or Other Action |
Soil contaminated with jet fuel was discovered during the Taxiway U Reconstruction Project at the Anchorage International Airport. Approximately 3 cubic yards of contaminated soil was placed in ASIG's leased area to the north of the main access road. |
Todd Blessing |
| 7/12/2006 |
Update or Other Action |
Rreviewed work plan to conduct a site investigation at the FEDEX Fuel Vault. Within the work plan, URS Inc. proposes to advance up to 12 soil borings in order to define the extent of hydrocarbon impacts to groundwater and vadose zone soil. Monitoring wells will be installed in eight of the soil borings. Groundwater samples collected following monitoring well installation and development will also be analyzed for petroleum constituents and de-icer compounds. At this time, the Department approves of the work plan as proposed by URS Inc. under the following conditions:
Where applicable, the laboratory procedure for silica gel cleanup as defined in the Departments technical memorandum 06-001 (May 18, 2006), shall be followed; and Environmental laboratory data and quality assurance requirements as defined in the Departments technical memorandum 06-002 (May 18, 2006) shall be followed. The Department recommends that URS Inc. complete the laboratory data review checklist which can be found at http://www.dec.state.ak.us/spar/guidance.htm#csp following receipt of the analytical data.
|
Todd Blessing |
| 11/14/2006 |
Update or Other Action |
Reviewed Site Characterization dated October 2006. Nine soil borings were advanced in order to determine the present extent of contamination. Elevated levels of petroleum constituents were detected in soil samples collect from borings advanced in Taxiway U. DRO was detected up to a level of 7,790 mg/kg. |
Todd Blessing |
| 3/23/2007 |
Exposure Tracking Model Ranking |
Initial ranking. |
Todd Blessing |
| 7/3/2007 |
Institutional Control Record Established |
In accordance with 18 AAC 75.350, ADEC has determined that the unconfined groundwater (above the Bootlegger Cove Formation) at the Anchorage International Airport (AIA) is not a current or future drinking water source. This determination is subject to the following conditions: 1. It applies only within the Airside and Commercial RMZ’s, as described in the Airport-Wide Remediation Management Plan. It does not apply within the Ecological RMZ. 2. It does not establish alternative cleanup levels within those zones but allows ADEC to use the determination in making decisions in accordance with 18 AAC 75.345(b)(2) - (3). 3. Any drinking water wells located on AIA property must be properly abandoned in accordance with ADEC decommissioning procedures within two years of this decision. 4. AIA shall prohibit the installation of any water wells, used for drinking, cooling, washdown, or any other purposes, on the AIA either through 17 AAC 42.410 (b) (27) of the airport leasing regulations or in their individual lease agreement documents. 5. The existing AIA water well used to maintain the water level in Lake Hood is not considered a drinking water well. However, AIA is responsible for determining its wellhead protection area and ensuring that it maintains levels at or below 18 AAC 75.345 Table C values, unless otherwise approved by ADEC. March 19, 2007 Amendment: DEC has determined that the shallow groundwater along the Lake Hood shoreline is not a current or future drinking water source in accordance with 18 AAC 75.350. Therefore, the March 2001 groundwater use determination is amended to include the shallow groundwater in the Ecological RMZ in that determination. |
Todd Blessing |
| 2/15/2011 |
Meeting or Teleconference Held |
DEC staff met with Amber Deem to discuss site status. Amber agreed to hire a contractor to construct a update conceptual site model to evaluate whether the site is a candidate for cleanup complete with institutional controls determination. |
Todd Blessing |
| 6/28/2016 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 72987 name: Jet Fuel |
Darren Mulkey |
| 6/30/2016 |
Document, Report, or Work plan Review - other |
In preparation for the Decision Document, the Method Three & Cumulative Risk Calculator was applied to the data presented in the October 2006 Site Characterization Report - FedEx Vault AIA. The results are 6x10E-7 for Total Cancer Risk and 0.08 Total Hazard Index. Exposure pathways are from soil by Direct Contact and Outdoor Inhalation and are De Minimis due to the access is restricted, the site is currently paved, and any construction activities in the area that include soil excavation will be conducted in accordance with an ADEC approved work plan. |
Darren Mulkey |
| 7/5/2016 |
Cleanup Complete Determination Issued |
A Cleanup Complete with Institutional Controls was issued on 7-5-16. Standard institutional controls associated with the Anchorage International Airport apply. The site was the location of a fuel spill in 1994. Free product was recovered until 1998. Since then the plume has diminished and or is remaining stable to within 60 ft. from the spill source. The site was paved over in 2006 as part of the Taxiway U expansion. |
Darren Mulkey |
| 9/16/2016 |
Institutional Control Compliance Review |
IC compliance review conducted. Staff changed from Darren Mulkey to IC Unit. Information added to the Closure/IC Details. Closure documentation uploaded to the database. Reminder system set to follow-up on concrete cap inspections every five years. |
Kristin Thompson |
| 10/26/2017 |
Institutional Control Update |
Contacted by DOT regarding a runway widening and maintenance project being planned for sometime in 2018. At this point DOT does not believe that they will be working right in the vicinity of the capped residual contamination. I suggested that they have a contingency workplan in place just in case they do run into contamination or if they end up working closer to this site boundaries than expected. I also provided the Managing Petroleum Contamination in Right-of-Way, Utility, or Maintenance Projects technical memo to use as a reference. |
Evonne Reese |
| 5/15/2020 |
Institutional Control Update |
Received a soil management work plan for the replacement of a storm drain manhole on this site on this site. A DEC review will occur in the next two weeks. |
Evonne Reese |
| 5/27/2020 |
Document, Report, or Work plan Review - other |
A soil characterization work plan was approved on this date for work that will be completed in the vicinity of this site. All contaminated soil with DRO concentrations greater than 12,500 mg/Kg will be transported to ASR in Anchorage. |
Evonne Reese |
| 6/17/2020 |
Document, Report, or Work plan Review - other |
Approved on this date Work Plan Amendment #1 that includes the change in the location where the "warm" soil will be land spread. They will now be taken to the Menzies Aviation Land Spreading Area which is on airport property. |
Evonne Reese |
| 7/24/2020 |
Update or Other Action |
Provided approval for a soil transport of 91 cubic yards generated during the recent project. Soil samples from the stockpiles did not exhibit any analyte concentrations that exceeded the soil cleanup levels. |
Evonne Reese |
