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Site Report: AFSC AIA North Terminal


Site Name: AFSC AIA North Terminal
Address: North of Anchorage Intl., Airport-'tween Gate N3&N5, Anchorage, AK 99502
File Number: 2100.38.028.12
Hazard ID: 595
Status: Active
Staff: Wendy Hansen, 9072693059 wendy.hansen@alaska.gov
Latitude: 61.178472
Longitude: -149.989536
Horizontal Datum:WGS84

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

Free product is present on groundwater in an approximately 30 by 160 foot area as the result of a 1989 jet fuel release. In 1989, jet fuel was discovered in a fuel system valve pit, and storm drains located at gates N3-N5 of Anchorage airport’s north terminal. The fuel had reportedly leaked from valve packing, filled the valve pit to an exit point, migrated along underground utility lines to the vault, and entered the storm sewer. Subsequent efforts recovered 2,000 gallons of product over a period of years using a skimmer pump. Efforts ceased when product recovery declined. However, in April 1999, borings made during an airport-wide site assessment encountered four feet of free product floating on groundwater. Thomas J. Mushovic VP/General Manager for Signature/ Alaska Fisheries Science Center (AFSC).

Action Information

Action Date Action Description DEC Staff
3/13/1989 Interim Removal Action Approved (Old R:Base Action Code = SC - Site Control (Emergency Response)). Fuel spill in storm drain near door ND-105. Pumped out 275-300 gallons Jet-A from underground line. On 3-14-89, 1650 gallons removed, repaired 2 leaking connections. No Longer Assigned
3/14/1989 Site Added to Database JetA fuel contamination. No Longer Assigned
4/7/1989 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Woodward Clyde sent workplan and quality assurance project plan for jet fuel contamination investigation for review. ADEC tentatively approved 5/18/90 with revisions indicated. No Longer Assigned
9/29/1989 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). WC believes contamination at borings A-IT-04 and A-IT-05 to be from spill under investigation since there located upgradient from spill. ADEC sends letter with comments 2-23-90. No Longer Assigned
2/23/1990 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Letter with 5 conditions requests workplan within 30 days of receipt of letter for identifying contaminant level and extent associated with product release, design active product recovery system. No Longer Assigned
3/22/1990 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). WC proceeds with selection of product recovery system and wishes to separate it from any soil/water contamination issues. Groundwater system fully operational by 1st week in July. No Longer Assigned
5/18/1990 Site Characterization Workplan Approved Woodward Clyde sent workplan and quality assurance project plan for jet fuel contamination investigation for review. ADEC tentatively approved 5/18/90 with revisions indicated. No Longer Assigned
6/1/1990 Cleanup Plan Approved (Old R:Base Action Code = F - Site Treatment, Soil/H2O). ADEC approves pit liner per 6/1/90 phone conversation. 6/18/90 Hydrant pit repair economically feasible. Proceeding with lining; all other existing "bottemless" pits in service at airport. No Longer Assigned
6/15/1995 Site Ranked Using the AHRM Initial ranking. Action code added because it wasn't when the site was originally ranked. Eileen Olson
10/2/1999 Update or Other Action Approved September 1999 plan to recover free product from groundwater. Eileen Olson
5/9/2000 Site Ranked Using the AHRM Site reranked because it appeared on the Top 30 List. Toxicity Value changed from 4 to 3; Quantity Value from 2.1 to 3; Population Density Value from 8 to 5; GW Exposure Index Value from 2 to 1; and Multiple Sources from "Y" to "N". Eileen Olson
11/20/2000 Site Characterization Report Approved Letter out reviewing URS report dated 10/31/00 which outlines monitoring well installation and free product recovery testing, as well as planned approach through winter 2000/2001. Eileen Olson
11/17/2004 Update or Other Action Submitted letter to Laurie Butler requesting monitoring of free product, groundwater, and an analysis of the indoor air pathway. Todd Blessing
6/23/2005 Update or Other Action Department reviewed and conditionally approved the May 27, 2005 Work Plan regarding product recovery and monitoring at ANC’s N3-N5 Gates. Within the work plan, URS Inc. proposes to evaluate the levels of free product and contaminants of concern from monitoring wells located near Gates N3-N5. Investigative derived waste will be disposed of at AFSC’s treatment facility. As an amendment to the Work Plan, URS Inc. also proposes to evaluate the vapor intrusion pathway by utilizing the Johnson and Ettinger GWSCREEN model. If the results of the analysis suggest that the inhalation risk is unacceptable, further study will be proposed. At this time, the Department approves of the Work Plan and its amendment provided the following conditions are met: • The values inputted into the Johnson and Ettinger GWSCREEN model for exposure duration and exposure frequency variables will be in accordance with the Department’s Cleanup Level Guidance (January 30, 2004) for Commercial/Industrial Exposure, which is 25 years and 250 days/year; respectively; and • Groundwater analytical laboratory data is independently verified by URS Inc. according to Section 8.0 of the Department’s Underground Storage Tank Procedures Manual. Todd Blessing
11/17/2005 Update or Other Action Reviewed Monitoring and Fuel Product Recovery Report. Fuel product was discovered in eight of ten monitor wells. One groundwater sample was collected from monitor well MW-7 and analyzed for petroleum constituents. The levels of petroleum constituents detected in this groundwater sample did not exceed Department cleanup levels. Fuel product recovery efforts were conducted between May and October 2000 using a skimmer pump and fuel vacuum truck. The skimmer pump is estimated to have recovered approximately 40 gallons of fuel. It is not known how much fuel the vacuum truck was able to recover. Todd Blessing
5/5/2006 Update or Other Action Recieved Sampling Plan During Reconstruction of Gates N4 and N6. During the project 23 inches of top soil will be removed. If contaminated soil is discovered, field screening will be collected from a grid style samping scheme (25 foot intervals). 25% of the field screening sample locations with the highest readings will be resampled. Warm soils (greater than 250 mg/kg and less than 12,500 mg/kg) will be either temporarily stockpiled or hauled directly to the landspreading area. Hot soils will be treated at an approved remediation system. Todd Blessing
6/16/2006 Update or Other Action Reviewed the site characterization work plan. Within the work plan, Shannon and Wilson Inc. proposes to advance three soil borings with two completed as monitor wells. One soil sample will be collected from each soil boring to be analyzed for petroleum constituents. Following the monitor well installation, groundwater samples will be collected from each monitor well that does not contain floating petroleum phase product. Investigative derived soil cuttings will be disposed of at Emerald Alaska’s wastewater facility. Waste water will be disposed of by AFSC. At this time, the Department approves of the work plan as proposed by Shannon and Wilson Inc. under the following conditions: •Groundwater and soil samples will be collected in triplicate from one sample location instead of in duplicate. The replicate groundwater samples will be submitted to the analytical laboratory “blind”; and •Soil cuttings generated during the site investigation will be treated at Alaska Soil Recycling, Inc. (per verbal agreement on June 16, 2006) since Emerald Alaska is not presently approved by the Department to treat contaminated soil. In addition, soil cuttings generated from this investigation will not be commingled with a soil or material contaminated with a source other than jet fuel. Post treatment soil samples will be analyzed for GRO/DRO and BTEX. Please be aware that the Department appreciates the cursory construction of a conceptual site model for N3/N5 gats. However, an investigation of the indoor air pathway has not been completed nor is it slated to be evaluated this summer. At this time, the Department requests that ASIG discuss a strategy with the Department on investigating the indoor air pathway. To date, the Department has not received any details on the North Terminal Building’s engineering controls that would impact the indoor air inhalation pathway. The Department is particularly interested in the magnitude of the positive pressure within the building and the design of the building foundation. Todd Blessing
8/22/2006 Update or Other Action Reviewed and conditionally approved ASIG's request to move any “warm” encountered contaminated soil to the AFSC landspread area that is discovered during the Gate N4 hardstand improvement project. Warm soil is defined as exhibiting a concentration of DRO in excess of 250 mg/kg, but less than 12, 500 mg/kg. Laboratory analytical results will be confirmed prior transport of contaminated soil to the landspread area. In addition, excavations around a storm drain during summer construction activities at Anchorage International Airport (ANC). If contaminated soil is uncovered during this project, you requested that “warm” soil be re-used or left in place. If contaminated soils are encountered at levels above 12,500 mg/kg DRO, they will be directly hauled to Alaska Soil Recycling (ASR). Todd Blessing
10/30/2006 Update or Other Action Requested that ASIG submit a work plan to the Department to conduct a site investigation near the storm drain which is located west of the North Terminal near North Tug Road. The Department recommends that ASIG hire a contractor to advance three to four soil borings near storm drain “A”. In addition, the Department recommends that water samples be collected from storm drains A, B, and C to be analyzed for jet fuel constituents. Todd Blessing
1/24/2007 Update or Other Action Reviewed storm drain sampling report for Anchorage International Airport. Storm water was sampled from three storm drains that are located in between gates N4 through N8. Elevated levels of DRO and GRO were detected in each sample suggesting fuel phase product present. The greatest concentrations of petroleum constituents appeared to be found in storm drains near gates N4 and N6. Todd Blessing
3/23/2007 Exposure Tracking Model Ranking Initial ranking. Todd Blessing
5/10/2007 Update or Other Action On May 2nd, met with ASIG and White Environmental to discuss means and methods to evaluate potentially contaminated soil during the next phase of hardstand reconstruction. Soil will be field screened and then stockpiled at Clitheroe to be analyzed for disposal options. Requested that every 500 cubic yards of soil, a confirmation soil sample be collected. Also requested that every 100 cubic yards a field screening sample be collected. Todd Blessing
6/27/2007 Update or Other Action Reviewed Final N6 Reconstruction Report and participated in a meeting with affiliated parties. Requested in the meeting that soil stockpiled as a result of 2007 construction activities be re-sampled since original soil samples were not selected based on field screening results. Todd Blessing
7/2/2007 Update or Other Action Reviewed brief work plan to field screen and sample soils stockpiled during N6 reconstruction project. White Environmental proposes to field screen every 50 cubic yards of soil and then collect soil samples from 25% of the most elevated field screening readings. Samples will be analyzed for GRO and DRO. The work plan was approved provided White Environmental collects one duplicate soil sample and submits it "blind" to the analytical laboratory and clearly defines final location(s) of all project soils in final report. In addition, White Environmental will need to fill out DEC's laboratory data review checklist for each laboratory data deliverable received and submit the completed checklists with the final report. 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
7/23/2007 Update or Other Action Work plan prepared by Shannon and Wilson to sample groundwater from the eleven existing monitor wells was approved. Groundwater samples will be analyzed for GRO, DRO, and BTEX. Todd Blessing
8/24/2007 Update or Other Action DEC evaluated the Gate N6 reconstruction final report. Potentially contaminated soil generated during the Gate N6 Reconstruction Project. This report documented the field screening and laboratory testing of potentially contaminated soil. DEC has evaluated the quality of the laboratory analytical data as well the field screening and soil sampling methods. The analytical data, as presented, is useable and sufficient to make a determination regarding disposal options for the stockpiled soil. The levels of contaminants of concern detected in soil samples did not exceed CSP’s most stringent cleanup levels and therefore, no further treatment of this soil is required. Todd Blessing
5/5/2008 Update or Other Action DEC staff reviewed a report titled "Gates N3/N5 AIA International Terminal Anchorage, Alaska." This report was recieved at DEC's Anchorage Office on December 21, 2007 and prepared by Shanon and Wilson (S&W) Inc. S&W evaluated the dissolved phase DRO plume by collecting groundwater samples from wells DM7, DM10, DM11, DM12, and DM13. The levels of DRO ranged from nondetect to 48.9 mg/l and the extent of the plume appears to have been delineated in the west and northwest directions. Free product thickness in wells A-it-02, DM1, DM2, DM3, DM4, DM5, DM8, and DM9 were also evaluated. Free product thickness ranged from 0.1 feet at DM9 to 4.54 feet at DM3. Todd Blessing
8/26/2008 Update or Other Action DEC staff has completed a review of a site characterization and groundwater sampling plan for the North Terminal, Anchorage International Airport (ANC). This work plan was prepared by Shannon and Wilson (S&W) and received at DEC’s Anchorage Office on August 19, 2008. S&W proposes to do the following at ANC’s North Terminal during the fall of 2008: 1. Advance three soil borings on the south side of the North Terminal which will be completed as monitor wells. 2. Collect one soil sample from each soil boring based on field screen readings to be analyzed for contaminants of concern (COCs). 3. Collect groundwater samples from all new and existing groundwater monitor wells to be analyzed for COCs. 4. Weekly monitor the presence of fuel product in existing monitoring wells and storm drain A. A letter was issued on August 26, 2008 approving of S&W's work plan with the following modifications: 1. S&W personnel will field screen each soil core with a photoionizing detector (PID) during soil boring advancement. The PID tip will be placed in the soil core at three different locations and the headspace reading recorded within 5 seconds. If the soil cores temperatures are too cold to generate a headspace reading the soil cores will be placed in ziplock bags and warmed to 60o F before screening. 2. Soil samples will be collected from soil cores with the highest field screen readings. 3. ASIG personnel will consistently monitor fuel product thickness and recovery rates from new and existing monitor wells on a weekly basis. Each monitor event should be conducted 7 days following the prior monitoring event. Weekly rainfall rates and/or accumulation will be recorded on the free phase product monitoring and recovery logs. 4. Twice a year, S&W personnel will supervise ASIG’s recordings of fuel thickness and fuel recovery and sign and date free-phase product monitoring and recovery logs. Todd Blessing
3/17/2009 Update or Other Action DEC staff reviewed Shannon and Wilson's (S&W's) "Site Characterization and Groundwater Sampling North Terminal, Anchorage International Airport, Anchorage, Alaska", dated January 2009 and ASIG's "International Terminal's Fuel Recovery 2008 Summary", dated March 12, 2009. The S&W report presented the results of the advancement of three soil borings (B1 through B3) that were eventually completed as monitoring wells. Four soil samples were collected during the soil boring advancement. GRO, DRO, and benzene were detected in these samples at maximum values of: 1,650 mg/kg, 2,980 mg/kg, and 0.496 mg/kg; respectively. S&W also sampled groundwater from 9 on-site wells and two of the newly installed wells that did not contain free product. Five of the 11 monitoring wells contained levels of DRO that exceeded cleanup levels and DRO was detected at a maximum level of 109 mg/L. Ten on-site wells had measurable levels of free product with monitoring well DM-4 exhibiting the greatest free product thickness of 3.1 feet. Monitoring well B2MW, which was recently installed near gate N6 exhibited a free product thickness of 1.26 feet. ASIG's report provided well recovery log's for monitoring wells DM1, DM3, and N2-2. Well logs for DM4 or B2MW were not provided. In general the rates of product recovery have declined in all three wells since August 2008. Todd Blessing
3/17/2009 Meeting or Teleconference Held DEC staff (Todd Blessing and Nathan Patry) participated in a meeting with ASIG and ADOT&PF representatives to discuss the issue of free phase product at the North Terminal. ASIG informed DEC that there will be an additional hardstand construction at gate N8 in August of 2010. ASIG requested that monitoring well N2-AFSC-3 be decommissioned because of lack of a well cover. ASIG will clean storm drain A to better assess how much fuel and glycol are impacting the storm drains in this area. ADOT could not provide any data on fuel recovery at storm drain outfalls; however, they believe the fuel product recovered at the outfalls is not increasing. ASIG representatives stated that the new Hansa leak detection system is being calibrated and will be online in a few weeks to a month. ASIG also plans on changing their valves in their hydrant pits from 2 inch values to 4 inch valves. DEC requested that ASIG continue reporting on free product recovery on a weekly basis and have a third party contractor confirm the accuracy of the data twice a year. Additionally, DEC requested that free product recovery rates from wells DM-4 and B2MW be provided to DEC as well. Todd Blessing
3/23/2009 Update or Other Action DEC staff reviewed and approved ASIG's request to decommission monitoring well, N2-AFSC-3. ASIG proposed to hire Discovery Drilling to fill the well casing and bore with a bentonite slurry, and the top five feet of the bore hole filled with clean structural material. The well was found to be mising a cover on March 13, 2009. Todd Blessing
6/9/2009 Site Characterization Workplan Approved DEC reviewed and approved of Shannon and Wilson's “Groundwater Monitoring and Plume Delineation Work Plan, Anchorage International Airport North Terminal” Dated June 2, 2009. Shannon and Wilson proposes to advance two soil borings approximately 200 feet west and southwest of existing well B2MW to determine jet fuel impacts to soil and groundwater west-southwest of gate N6. Both soil borings will be completed as temporary monitoring wells. One soil sample will be collected from each soil boring depending on field screening results and analyzed for GRO, DRO, and BTEX. Groundwater samples will be collected in June and September or October and analyzed for GRO, DRO, and BTEX from the temporary well points if jet fuel is not present on groundwater. S&W will also conduct two field audits of ASIG’s fuel phase product recovery efforts. Todd Blessing
12/7/2009 Site Characterization Report Approved DEC staff reviewed Shannon and Wilson's (S&W's) "Groundwater Sampling North Terminal, Anchorage International Airport Anchorage, Alaska", dated October 2009. S&W documented their site characterization activities in June 2009 which included advancing three borings completed as temporary monitoring wells. Free phase product was measured in 11 of the 19 permanent monitoring wells. The eight other wells were sampled for contaminants of concern and S&W conducted a field audit of ASIG's product recovery and recording procedures on October 14, 2009. Groundwater elevations indicated that groundwater flows west-northwest which was consistent with prior measurements. DRO was detected in all of the eight sampled wells with concentrations ranging from 0.449 to 9.60 mg/L. GRO and BTEX were detected in four of the eight sampled wells. GRO and/or benzene concentrations detected in samples from wells N2-AFSC-5, DM11, and N2-AFSC-5 exceeded DEC cleanup criteria. Free product and groundwater contaminant concentrations did not indicate an consistent decreasing or increasing trend. Todd Blessing
4/12/2010 Update or Other Action DEC staff reviewed and approved of Tellus Ltd’s “Sampling and Analysis Work Plan for ANC Gate N8 Pavement Replacement, Anchorage International Airport” dated March 2010. The subject work plan was submitted to DEC to define procedures for identifying and treating contaminated soils encountered during the pavement replacement of Gate N8, at Anchorage International Airport (ANC). Tellus, Ltd. (Tellus) proposes to field screen soils within trench excavations, within twenty-five feet of any fuel lines, associated fuel system structures, storm drain structures, and where hydrocarbon impacts are noted. Confirmation soil samples will be collected and analyzed for GRO, DRO, and BTEX from at least 25 percent of the field screening locations exhibiting the highest field screening results. Up to three samples will be collected and analyzed for Glycol to determine if de-icer fluids are impacting analytical results for DRO. Hot soil (i.e. DRO greater than 12,500 mg/kg) will be stockpiled on-site. Tellis will immediately notify ADOT and ASIG’s Environmental Manager of any hot soil stockpiled. Warm Soil (i.e. exceeds ADEC regulatory criteria for migration to groundwater) will be transported to ANC’s temporary contaminated soil stockpile area. A final project report will be submitted to ADOT&PF and include a site narrative, figures with sampling locations, field data, analytical laboratory data and CSP data review checklists. Todd Blessing
9/13/2010 Site Characterization Workplan Approved DEC staff reviewed and approved of Shannon and Wilson’s “Groundwater Monitoring Work Plan, Anchorage International Airport (AIA) North Terminal, Anchorage, Alaska“ Dated July 6, 2010. Shannon and Wilson (S&W) proposes to annually monitor groundwater at AIA’s North Terminal in accordance with CSP’s May 2010 Draft Sampling Guidance. In addition S&W will annually field audit the evaluation and recovery of free product at AIA’s North Terminal. Todd Blessing
9/29/2010 Update or Other Action DEC reviewed Tellus Ltd's "Field Summary Report For ANC Gate N8 Pavement Replacement", Dated September 2010. In this report, Tellus Ltd. documented the sampling and excavation of soil uncovered during the the airports N8 pavement replacement project. Based on confirmatory soil sample results, approximately 30 cubic yards of contaminated soil that was classified as "warm" was removed and transported to ASIG's landfarm area. Contaminated soil was also left in place near ASIG's former fuel lines and hydrant pits. Todd Blessing
12/17/2010 Update or Other Action DEC staff reveiwed Shannon and Wilson's "Groundwater Sampling North Terminal, Anchorage International Airport", dated December 2010. In this report, Shannon and Wilson (S&W) documented the sampling and analysis of groundwater from seven existing wells. One well without free phase product could not be sampled becuase it was dry. S&W documented the presence of free phase fuel in 8 of the 16 existing wells. The levels of product in the wells ranged from 0.01 to 0.73 feet below ground surface. DRO was detected in each of the seven wells sampled and ranged from 0.04 to 125 mg/L. GRO was detected at levels that ranged from nondetect to 5.68 mg/L and benzene was detected at levels that ranged from nondetect to 0.166 mg/L. Todd Blessing
2/15/2011 Meeting or Teleconference Held DEC staff met with Amber Deem if ASIG to discuss site status. Amber informed DEC that free product efforts in the winter were put on hold due to problems with well monuments and the ability of ASIG personnel to locate the wells under ice/snow. She recommended replacing wells B3MW and B1MW. She anticipates submitting a free product recovery report in the next month to DEC. Todd Blessing
5/4/2011 Update or Other Action DEC staff reviewed ASIG's North Terminal Recovery 2010 Summary Letter Dated April 5, 2011. The letter discusses the levels of free product thickness and recovery volumes in wells the past year. The levels of free product in wells recovered in 2010 were significantly less than what was recovered in 2008 and 2009. Plots of well fuel thickness in DM-3 and DM-4 support the observation that availability of recoverable fuel is declining over time. ASIG requested CSP’s concurrence to suspend free product recovery and monitoring during the winter months due to problems with accessing the wells. DEC approved of this request in our May 3, 2010 letter to ASIG. Todd Blessing
3/12/2012 Site Characterization Report Approved DEC staff reviewed ASIG's 2011 Fuel Recovery report. ASIG occured during 2011 but was stopped at the end of August due to staff turnover as well as difficulties accessing wells. In 2011, a total of 34.04 gallons of fuel product was recovered. which is the third consecutive year with declining fuel recovery. However, fuel recovery did increase in August in both DM4 and DM3 wells. Todd Blessing
10/29/2012 Update or Other Action DEC staff reviewed URS' Letter Report - Product Recovery Oversight dated October 18, 2012. URS conducted oversight of product recovery efforts on October 10, 2012. During this event three wells DM-1, DM-3, and DM-8 were evaluated. In these wells free product levels ranged from 0.1 to 1.18 feet. The total amount of free product recovered was 0.924 gallons. Todd Blessing
4/10/2013 Update or Other Action Updated Lat/Long based on aerial Jacob Gano
5/8/2013 Site Characterization Report Approved Reviewed ASIG's North Terminal Fuel Recovery 2012 Summary report. 81.68 gallons of fuel were recovered in 2012 from the wells on the north side wells of the North Terminal; no fuel was recovered from the south site wells associated with the Gate N2 site. Wells with were bailed include DM1 through DM5, DM8, DM9, and AIT-02. Jacob Gano
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
4/14/2014 Report or Workplan Review - Other ADEC received the North Terminal Fuel Recovery 2013 Summary. 19.2 gallons of product was recoverd from wells DM-1, DM-2, DM-3, DM-4, and AIT-02. Meghan Dooley
2/24/2015 Meeting or Teleconference Held ADEC met with AFSC/ASIG and consultant. ADEC approved of waiver of third party manual recovery requirement. ADEC approved that third party certification of methods is required once a year and since methods are the same, certification of the AFSC Former Bulk Fuel Tank Farm product removal can be used as quality assurance of removal methods at this site. Lisa Krebs-Barsis
2/25/2015 Site Characterization Report Approved Reviewed the North Terminal 2014 Groundwater Monitoring Report. Wells DM-5, DM-9, N2-AFSC-1, N2-AFSC-4, and N2-AFSC 5 had no measurable product and were sampled for diesel range organics (DRO), gasoline range organics(GRO), benzene, toluene, ethylbenzene, and total xylenes. DM-5 and N2-AFSC-1 exceeded groundwater cleanup levels for DRO, GRO and benzene. DM-9 exceeded for benzene and N2-AFSC-5 exceeded for DRO and benzene. Lisa Krebs-Barsis
6/20/2017 Report or Workplan Review - Other Reviewed North Terminal 2016 groundwater monitoring report, dated March 6, 2017. Wells DM-9, N2-AFSC-1, N2-AFSC-4, and N2-AFSC 5 had no measurable product and were sampled for diesel range organics (DRO), gasoline range organics(GRO), benzene, toluene, ethylbenzene, and total xylenes. Well DM-5, sampled during the previous event, was not sampled due to the presence of free product. N2-AFSC-1 exceeded groundwater cleanup levels for DRO, GRO, benzene, ethylbenzene, and xylene. DM-9 and N2-AFSC-5 exceeded for DRO and benzene. Continued annual monitoring was recommended. Wendy Hansen
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.Free product recovery with biennial oversight by AECOM and annual (typically August) groundwater sampling of wells without product is ongoing for this site, and associated North Terminal Gate N2, 2100.38.028.13. Wendy Hansen

Contaminant Information

Name Level Description Media Comments
DRO Other SoilGroundwater
GRO Other SoilGroundwater
BTEX Other SoilGroundwater

Control Type

Type Details
Other Commercial and Airside Remediation Management Zones as well as the Lake Hood shoreline are not a present or future drinking water source.

Requirements

Description Details
Groundwater Use Restrictions Any drinking water wells located on AIA property must be properly abandoned in accordance with ADEC decommissioning procedures within two years of this decision. 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.

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