| Action Date |
Action |
Description |
DEC Staff |
| 6/17/1997 |
Site Added to Database |
|
Former Staff |
| 6/17/1997 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77931 Three regulated USTs were removed by 6/19/97. Analytical results indicated that both soil and GW were above cleanup levels. |
Former Staff |
| 6/19/1997 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
Approximately 300 c.y. of petroleum contaminated soil was excavated and confirmed by sampling and analysis. |
Former Staff |
| 10/16/1997 |
Update or Other Action |
The "Notification of Post-Closure; Underground Storage Tanks" and "Closure Checklist" was signed and dated 6/25/97 and received by the department on 10/16/97. |
Lynne Bush |
| 11/20/1997 |
Update or Other Action |
ADEC sends "Notification of Intent to Cost Recover" letter to current owner: Aero Tech Flight Service. |
Former Staff |
| 12/2/1997 |
Update or Other Action |
After review of the Shannon & Wilson "Underground Storage Tank Closure Assessment; Aero Tech Flight Service, Inc.; 1100 Merrill Field Drive; Anchorage, Alaska" dated July 1997 and received by the department on 10/16/97 a letter was sent requesting a release investigation be conducted to define the extent of GW contamination and submit the results by 2/11/98.
Three regulated USTs were removed by 6/19/97. The two northerly tanks were reportedly used to store 80-100 low-lead AvGas and the southerly tank was reportedly used to store Jet A fuel. A new 10,000-gallon dual compartment UST replaced the former three USTs. The soil under the three dispensers was visibly stained with either Jet A or AvGas, as was the soil around the south tank fill pipe. The south dispenser fuel hose was noted to be leaking. Soil under the south dispenser and UST was the most visibly impacted and was noted to ~14’ bgs. A test pit was subsequently advanced to 29’ bgs and visual and olfactory impacts and PID readings were observed. GW was not encountered in the test pit and it was sampled and backfilled with pea gravel after installation of a passive aeration system. A 20-mil impermeable liner was placed on top of the soil. The total area of the excavated tanks and related dispensers was 29’x39’. The contaminated stockpile was estimated to be ~300 c.y. while the "clean" stockpile was ~50 c.y.
On 6/19/97 Boring B-1 was advanced to ~32’ bgs. GW was encountered at ~29’ bgs and later measured at 26.6’ bgs. A monitoring well was installed in the boring. A dry to moist, tan to gray silt was encountered at ~30.3’ bgs.
Soil and GW was analyzed for GRO, DRO, BTEX, and total lead. Excavation sidewall and bottom soil samples indicated were taken. Results for GRO were up to 29.1 mg/kg; up to 32.9 mg/kg for DRO, up to 2.73554 mg/kg total BTEX; up to 0.104 mg/kg benzene; and up to 68 mg/kg total lead. The GW sample results were 17mg/l GRO; 4.62 mg/l DRO; 0.117 mg/l benzene; 0.724 mg/l toluene; 1.54 mg/l ethylbenzene; 5.059 total xylenes; and ND (<0.00568 mg/l) for dissolved lead.
The asphalt generated from pavement removal was transported to BCX of Anchorage for recycling. Concrete removed was taken to Alaska Sand and Gravel for reuse at their asphalt batch plant. The petroleum hydrocarbon contaminated soil was taken to Alaska Soils Recycling for thermal remediation. After the tanks were cleaned they were taken to Newell Recycling Alaska. |
Robert Weimer |
| 5/30/2002 |
Update or Other Action |
Transferred site to DEC staff Amanda Dreyer. |
Robert Weimer |
| 5/31/2002 |
Update or Other Action |
A letter was sent requesting a Release Investigation and Groundwater Monitoring be conducted at the site. |
Amanda Dreyer |
| 7/22/2002 |
Update or Other Action |
The department received a copy of the Shannon & Wilson, Inc. "Proposal for Release Investigation and Groundwater Monitoring at Aero Tech Flight Service, 1100 Merrill Field Drive, Anchorage, Alaska" dated 6/13/02. |
Amanda Dreyer |
| 3/9/2005 |
Update or Other Action |
Project Manager transfer: Dreyer -> Bush. |
Lynne Bush |
| 3/9/2005 |
Update or Other Action |
A letter was sent requesting an update on remedial progress. |
Lynne Bush |
| 7/15/2005 |
Update or Other Action |
Discussed plan components with consultant. Plan should be submitted for review next month. |
Lynne Bush |
| 5/9/2006 |
Update or Other Action |
Project management transferred from Bush to Sundet. |
Aggie Blandford |
| 3/30/2007 |
Update or Other Action |
Staff reassigned from Sundet to Petrik. |
Aggie Blandford |
| 3/4/2008 |
Update or Other Action |
Updated the erroneous latitude and longitude derived from the address digitizing previously used. Used TopoZone Pro High-Resolution Aerial Photography with no topographic base map at a 1:2,952 Scale, plotted on a Large Map and the NAD 83 in conjunction with a site map. The coordinates were corroborated using Google Maps. |
Bill Petrik |
| 3/4/2008 |
Exposure Tracking Model Ranking |
Initial ranking. |
Bill Petrik |
| 5/20/2009 |
Update or Other Action |
Telephoned Mr. Richard Ardaiz, the responsible party, to discuss the site. He said that as far as he was concerned he supplied the department with all the information that it needed. Mr. Ardaiz said that he would call me back in a couple days with the latest information that he has on the site. |
Bill Petrik |
| 5/29/2009 |
Update or Other Action |
As as follow-up to the 5/20/09 telephone conversation that the CSP conducted with the RP, Mr. Richard Ardaiz, the CSP received a return phone call from him after he found the site file and reviewed it. Mr. Ardaiz indicated that the former project manager, Amanda Dreyer, asked him to hold off on the clean up as the work may get cheaper and that more money through the state may be available to assist him in the cleanup. The CSP and Mr. Ardaiz concurred with the latest information and site status as well as the last request by the CSP by Lynne Bush in a letter dated 3/09/05 for further site characterization and GW monitoring. However, Mr. Ardaiz indicated that he does not have the funds to conduct the requested work. His insurance will not cover the environmental issues at his site, there are no funds avaialable through the state finanacial assistance program, and his site did not receive any federal stimulus monies for cleanup. He is willing to pursue further cleanup but financially unable. |
Bill Petrik |
| 1/24/2012 |
Potentially Responsible Party/State Interest Letter |
In follow-up to conversations to Valia and/or Michael Ardaiz on January 6 and again on January 21, 2012, on 1/24/12 DEC issued a PRP letter to the Richard Ardaiz Estate which is currently managed by his children Valia and Michael Ardaiz. |
Rich Sundet |
| 6/5/2012 |
Meeting or Teleconference Held |
Discussion with RP, as of this date there was no actioned planned. |
Katrina Chambon |
| 9/19/2012 |
Document, Report, or Work plan Review - other |
Sent email requesting additional analysis for EDB, 1,2 DCA and PAHs and a map that shows where ground water wells will be installed. |
Katrina Chambon |
| 10/9/2012 |
Site Visit |
Site visit conducted with consultant in order to determine if existing groundwater monitoring well is viable and to determine location of installation of new groundwater monitoring wells. |
Katrina Chambon |
| 10/22/2012 |
Document, Report, or Work plan Review - other |
Work Plan approved with the following conditions:
•CSP requests that the new monitoring wells be installed according to DEC’s Monitoring Well Guidance, dated November 2011.
•CSP requests that groundwater and soil sampling be performed in accordance to DEC’s Draft Field Sampling Guidance, dated May 2010.
•CSP requests that groundwater flow be determined.
•Complete copies of field notes need to be provided with the report.
•Please provide three (3) working days advance notice when planning to do work, to give us an opportunity to be on site to inspect.
•Please provide historical soil and groundwater sampling data in report
|
Katrina Chambon |
| 10/30/2012 |
Site Visit |
Chambon and Weimer conducted site visit to observe soil sampling and groundwater well installation. |
Katrina Chambon |
| 10/31/2012 |
Site Visit |
Conducted site visit to observe soil sampling and groundwater well installation. |
Katrina Chambon |
| 11/28/2012 |
Offsite Soil or Groundwater Disposal Approved |
Approval to spread clean soils at Merrill Field |
Katrina Chambon |
| 11/29/2012 |
Site Visit |
Site visit to observe groundwater sampling. |
Katrina Chambon |
| 1/4/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77931 Two Low-Lead AvGas & 1 Jet A USTs. |
Katrina Chambon |
| 1/7/2013 |
Document, Report, or Work plan Review - other |
Work Plan Review from consultant TeELLUS, LTD. The January 4th work plan proposes: to install two new soil borings; complete the borings as groundwater wells, and perform groundwater sampling at the two new boring locations. The plan also proposes that field screening of soil for volatile organic compounds (VOCs). |
Katrina Chambon |
| 1/7/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77931 Two Low-Lead AvGas & 1 Jet A USTs. |
Katrina Chambon |
| 1/8/2013 |
Site Characterization Workplan Approved |
The January 4th work plan proposes: to install two new soil borings; complete the borings as groundwater wells, and perform groundwater sampling at the two new boring locations. The plan also proposes that field screening of soil for volatile organic compounds (VOCs).
This work plan is approved with the following conditions:
• A soil sample be collected at each of the two borings from the groundwater/soil interface and an additional soil sample is to be collected at another depth if that depth appears to be contaminated based on field readings/observations. Field screening shall be conducted every 2.5 feet in each boring. Samples selected for analysis shall be analyzed in an ADEC approved laboratory for VOCs using EPA Method 8260, GRO using AK Method 101 and DRO using AK Method 102.
•CSP requests that a groundwater sample be collected and analyzed for 1,2-dibromoethane (EDB) from MW-1. The results from the groundwater samples collected in November 2012 had a result of 0.0000426 mg/L, which is slightly below ADEC groundwater cleanup level of 0.00005 mg/L; however, do to the increased temperature of 11 Cº upon arrival at laboratory, there is a quality assurance /quality control concern.
•CSP request that a duplicate sample be collected from MW-1 and a duplicate sample from one of the soil samples.
•The new monitoring wells are installed according to DEC’s Monitoring Well Guidance, dated November 2011.
•Groundwater and soil sampling be performed in accordance to DEC’s Draft Field Sampling Guidance, dated May 2010; including a duplicate sample for each matrix and each analyte.
•Determine groundwater flow.
•Complete copies of field notes need to be provided with the report.
•Please provide three (3) working days advance notice when planning to do work, to allow CSP the opportunity to be on site to inspect.
|
Katrina Chambon |
| 1/14/2013 |
Site Visit |
Site visit conducted to observe soil sampling. |
Katrina Chambon |
| 2/13/2013 |
Meeting or Teleconference Held |
Meeting held with RP, airport manager, potential leasee and consultant to discuss what further action is required at the site. CSP requested that the north east area of the lot be defined in order to determine the extent of the contamination. CSP request that a second groundwater sampling event be conducted in the spring of 2013. |
Katrina Chambon |
| 2/13/2013 |
Offsite Soil or Groundwater Disposal Approved |
Approval to spread clean soils at Merrill Field |
Katrina Chambon |
| 2/22/2013 |
Meeting or Teleconference Held |
Meeting with airport manager to discuss what further action is required at the site. |
Katrina Chambon |
| 2/25/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77931 Two Low-Lead AvGas & 1 Jet A USTs. |
Katrina Chambon |
| 3/11/2013 |
Site Characterization Workplan Approved |
The work plan proposes: to install one new soil borings and complete as a groundwater well, develop the monitoring well, and, perform soil and groundwater sampling at the new boring/groundwater monitoring well. This work plan is approved with the following conditions:
1. CSP requests that the soil with the highest PID reading be collected and analyzed and from the soil groundwater interface
2. CSP requests that the report contains a brief history (background) of the site, hydrogeology, and Quality Assurance summary per DEC’s Underground Storage Tanks Procedures Manual dated November 7, 2012.
3. CSP requests that a duplicate sample be collected from MW-F for both soil and groundwater, and sampled for each analyte as stated in the work plan.
4. CSP requests that the new monitoring well be installed according to DEC’s Monitoring Well Guidance, dated November 2011.
5. CSP requests that groundwater and soil sampling be performed in accordance to DEC’s Draft Field Sampling Guidance, dated May 2010.
6. Complete copies of field notes need to be provided with the report.
7. Please provide three (3) working days advance notice when planning to do work, to give us an opportunity to be on site to inspect.
CSP requests that a second groundwater sampling event occurs in late May or June of 2013. Monitoring Well MW-F can be surveyed at this time, along with all monitoring wells. |
Katrina Chambon |
| 3/15/2013 |
Meeting or Teleconference Held |
Meeting held with RP, airport manager, potential leasee and consultant to discuss what further action is required at the site. CSP requested that the north east area of the lot be defined in order to determine the extent of the contamination. CSP request that a second groundwater sampling event be conducted in the spring of 2013. |
Katrina Chambon |
| 4/16/2013 |
Meeting or Teleconference Held |
Meeting with potential leasee and Airport manager regarding results for recent groundwater sampling and what continued work is needed at site. |
Katrina Chambon |
| 4/17/2013 |
Document, Report, or Work plan Review - other |
Review Field Summary Report for Aero Tech Flight Service dated April 2013 |
Katrina Chambon |
| 4/19/2013 |
Offsite Soil or Groundwater Disposal Approved |
|
Katrina Chambon |
| 5/6/2013 |
Site Characterization Workplan Approved |
The Alaska Department of Environmental Conservation (DEC), Contaminated Sites Program (CSP), has completed its review of the subject work plan for the above referenced site. The work plan was received at our Anchorage office by email on April 30, 2013. The work plan proposes perform groundwater sampling from monitoring wells MW1, MWA, and MWB. This work plan is approved with the following conditions:
1.Per our March 11, 2013 letter and previous meetings with you and your consultant, we request that all monitoring wells (MW1, MWA, MWB, MWC, MWD, MWE, and MWF) will be sampled in June 2013. As we previously also noted, please be aware Per 18 AAC 75.40, unless otherwise approved by the department, a responsible person shall conduct monitoring quarterly for at least one year to establish the concentration trend. A single sample event for monitoring wells MWC, MWD, MWE, and MWF will not determine a trend in concentrations.
2.Contamination from other sources cannot be confirmed until groundwater flow has been consistently established. Groundwater flow shall be determined for the June 2013 sampling event. The final report shall provide a map with past and current groundwater flow directions along with historical sampling event data, including survey data. The monitoring wells may need to be resurveyed due to frost jacking.
3.The groundwater sampling event shall occur between May 31 and June 30, 2013. Therefore, CSP denies your consultants date for fieldwork being performed during the week of May 20, 2013. The purpose for conducting late May or June groundwater monitoring is to assist with establishing a trend when the water table is higher. Since cooler weather has been occurring, CSP request that samples be collected on or after May 31, 2013. However, your consultant may determine that if the water table is seasonally high during the week of May 20, 2013, he can make a request to sample earlier than May 31 provided his request includes supporting groundwater elevation data. However, no sampling of groundwater prior to May 31, 2013 can occur without CSP approval.
4.CSP requests that groundwater sampling be performed in accordance to DEC’s Draft Field Sampling Guidance, dated May 2010.
5.CSP requests that a duplicate sample be collected from MWA.
6.Complete copies of field notes must be provided with the report. The report must provide a table of compilation of all groundwater data and elevation data for each monitoring well, including data from the off property MOA well. The report must contain a quality assurance/quality control section discussing any laboratory discrepancies. Please note that CSP requires a hard copy of the final report. Please do not submit the final report only electronically or in CD format; however, laboratory data will be accepted on a CD, if the report is more than 200 pages. Hard copies shall be delivered or mailed to the DEC office.
7.Please provide three (3) working days advance notice when planning to do work, to give us an opportunity to be on site to inspect.
|
Katrina Chambon |
| 7/29/2013 |
Conceptual Site Model Submitted |
|
Katrina Chambon |
| 8/2/2013 |
Update or Other Action |
The Contaminated Sites Program (CSP), has completed its review of the subject report for the above referenced site. Groundwater sampling occurred on July 13, 2013. Three samples and one duplicate were collected from monitoring wells MWA, MWB, and MWC. DRO results ranged from non-detect to 2.94 mg/L, GRO ranged from non-detect to 2.8 mg/L, and benzene results ranged from non detect to 0.0113 mg/L.
Based on our review of this report, it appears that this site meets ADEC’s criteria for a Cleanup Complete with Institutional Controls Determination. Please have all of the monitoring wells at the site decommissioned in accordance with ADEC guidance and documented in a brief report. |
Katrina Chambon |
| 8/14/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77931 Two Low-Lead AvGas & 1 Jet A USTs. |
Katrina Chambon |
| 10/3/2013 |
Cleanup Complete Determination Issued |
The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with Aero Tech Flight Service located at 1100 Merrill Field Drive, Anchorage, AK 99501. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required as long as the site is in compliance with established institutional controls. |
Katrina Chambon |
| 10/3/2013 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Katrina Chambon |
| 10/3/2014 |
Institutional Control Compliance Review |
IC compliance review conducted and staff changed to IC Unit. Reminder system set-up to follow-up with the responsible party in 2018. |
Kristin Thompson |
| 10/29/2018 |
Institutional Control Compliance Review |
An IC verification letter was issued to the responsible party/landowner on this date. |
Mossy Mead |
| 11/13/2018 |
Institutional Control Compliance Review |
Institutional Control Verification Letter re-sent with updated Facility Lessee information. |
Mossy Mead |
| 6/13/2024 |
Institutional Control Compliance Review |
IC compliance review completed on this date. An IC reminder letter was e-mailed to the landowner. The next review will be in five years’ time. |
Gaige Robinson |
