| Action Date |
Action |
Description |
DEC Staff |
| 8/13/1991 |
Site Added to Database |
|
Former Staff |
| 8/13/1991 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 76608 ADD; Avgas contaminant. |
Former Staff |
| 8/14/1991 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; :LCAU Date changed DB conversion |
Former Staff |
| 8/30/1991 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; Reviewed a phase 1 site assessment report. |
Former Staff |
| 9/17/1991 |
Release Investigation |
SI; Dowl assessment report of August 12 thru 14 tank closure. Conclusions reached that subsurface contamination exists in soils at the site above ADEC limits. North wall excavation 105,000 ppm (method 8100 EPH) and 1960 ppm (method 8015 VPH). Recommendations are that groundwater monitoring wells be installed for characterizing groundwater contamination space. |
Former Staff |
| 10/7/1991 |
Update or Other Action |
REM; Dowl Engineers submitted Long-term Stockpiling Plan of 90 cubic yards of contaminated soil. On 10/16/91 sampling results 0.096 ppm dibromochloromethane which was not allowed in processing at Anchorage Sand and Gravel. Other disposal options are being pursued. A resampling effort was proposed to verify presence of dibromochloromethane. |
Former Staff |
| 4/9/1993 |
Leaking Underground Storage Tank Corrective Action Underway |
CAPR; Approved Final Assessment Corrective Action Work Plan. |
Former Staff |
| 7/30/1993 |
Release Investigation |
SA2R; Reviewed a phase 2 site assessment report. |
Former Staff |
| 9/19/1995 |
Update or Other Action |
CAPR; Reviewed CA workplan. |
Former Staff |
| 10/4/1995 |
Update or Other Action |
CAPR; Reviewed a airport corrective action plan at the request of ADOT&PF. |
Former Staff |
| 4/10/1996 |
Leaking Underground Storage Tank Corrective Action Underway |
CAPA; Reviewed a corrective action plan. |
Former Staff |
| 6/3/1996 |
Update or Other Action |
UPD; Reviewed a corrective action plan. |
Former Staff |
| 10/16/1996 |
Update or Other Action |
UPD; Reviewed Phase I preliminary data. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: LOUIE GAVRILOVICH |
Former Staff |
| 12/16/1998 |
Update or Other Action |
Fall 1998 gw analysis |
Former Staff |
| 2/1/1999 |
Update or Other Action |
Finished 1998 mw and spring 1999 mw will exhaust grant money. Dowl (Louie Gavrilovich) will send continued request for FAP$ |
Former Staff |
| 6/7/2001 |
Update or Other Action |
Spring 2001 GW monitoring found up to 2.14mg/l GRO and .0291 mg/l benzene. |
Robert Weimer |
| 11/3/2003 |
Update or Other Action |
ADEC Project Manager transferred from Weimer to Blessing |
Todd Blessing |
| 6/30/2004 |
Update or Other Action |
Submitted letter to RP and prospective buyers of lease requesting groundwater and surface water monitoring plan after reviewing file and meeting with prospective buyers of lease. |
Todd Blessing |
| 1/7/2005 |
Underground Storage Tank Site Characterization or Assessment |
Received Fall 2004 Monitoring Plan. Plan proposes to:
Install two monitoring wells (MW-9 and MW-10) and collect a soil sample from each monitoring well boring to be analyzed for DRO, GRO, and BTEX;
Purge and collect a groundwater sample from the new monitoring wells and existing wells MW-3 and MW-6 to be analyzed for DRO, GRO, and BTEX; and
Deploy and sample four passive diffusion bag samplers. Water samples will be analyzed for BTEX. |
Todd Blessing |
| 1/19/2005 |
Update or Other Action |
Approved of Fall 2004 Monitoring Plan. Plan is being implemented the week of January 17 through 21, 2005. |
Todd Blessing |
| 2/10/2005 |
Document, Report, or Work plan Review - other |
Reviewed Fall 2004 Monitoring Report. The report, dated February 9, 2005, presents the findings of subsurface investigation and monitoring program regarding the former underground storage tank location. Groundwater was collected from on-site monitoring wells and water was collected at the groundwater/surface water interface of the Lake Hood shoreline. In addition, two new monitoring wells were installed. Soil and groundwater samples were collected and analyzed for petroleum constituents during the monitoring well installation. In the two soil boring samples collected, gasoline range organics and its constituents were measured at levels that did not exceed 18 AAC 75.341 Table B1 and B2 values. In the groundwater samples collected from monitoring wells, gasoline range organics and its constituents were detected at levels that exceed 18 AAC 75.345 Table C levels in one monitoring well near the Lake Hood shoreline. No petroleum constituents were detected in water samples collected from the groundwater/surface water interface. |
Todd Blessing |
| 2/28/2005 |
Conditional Closure Approved |
Department has determined that no further remedial action is required at the Lake Hood Air Complex site. This determination recognizes that areas of soil and groundwater contamination remain above 18 AAC 75 soil and groundwater levels but it does not pose a risk to human health or the environment. |
Todd Blessing |
| 2/28/2005 |
Institutional Control Record Established |
In order to ensure site conditions (and any restrictions on future use) are documented, an institutional control shall be attached to the site. This determination is subject to the following conditions:
1. any proposal to excavate or transport soil (or groundwater) requires ADEC approval in accordance with 18 AAC 75.325(i);
2. groundwater and surface water shall be periodically monitored to ensure contamination is decreasing and not migrating into Lake Hood and/or off site. A monitor plan shall be submitted for ADEC review and approval.
3. additional investigation and/or cleanup action may be necessary in the future if new information indicates there is hazardous substance contamination at this site that may pose a risk to human health and the environment. |
Todd Blessing |
| 2/28/2005 |
Update or Other Action |
Submitted letter to Alan Jones requesting copies of any documents that pertain to the sale of the Lake Aire Complex Facility. In addition, requested that a long-term groundwater and surface water monitoring plan be submitted to the Department. |
Todd Blessing |
| 3/22/2006 |
Long Term Monitoring Established |
Issued letter approving of monitoring plan, dated March 17, 2006, which was developed by Oasis Environmental Inc. Within the monitoring plan, Oasis Environmental Inc. proposes that during the summer of 2006, a new monitoring well (MW-11) will be installed near the former location of the underground storage tank. Soil samples will be collected during the installation of MW-11. Following the well installation, Oasis Environmental Inc. will collect groundwater samples from monitoring wells MW-9 and MW-11 to be analyzed for GRO/BTEX and DRO according to ADEC approved methods. In addition, pore water will be collected and analyzed for GRO/BTEX and DRO from passive diffusion bags deployed at the sediment surface water interface following a week of equilibration. The monitoring schedule will be repeated during the summer of 2008 and five years thereafter. |
Todd Blessing |
| 7/27/2006 |
Document, Report, or Work plan Review - other |
Reviewed 2006 Long Term Monitoring Report. Groundwater samples were collected from monitor wells MW9, MW11, and MW12. the levels of GRO and benzene exceeded 18 AAC 75.345 Table C values in monitor well MW9 and not in monitor well MW12. No contaminants of concern were detected in pore water samples. |
Todd Blessing |
| 6/17/2009 |
Update or Other Action |
DEC staff issued a letter to Steve Zelener requesting he provide a site update, in writing, by July 31, 2009 regarding DEC's requirment for groundwater monitoring during the summer of 2008. |
Todd Blessing |
| 6/29/2009 |
Update or Other Action |
DEC staff recieved an email from Steve Zellener. Mr. Zellener stated that he had hired BGES to conduct groundwater monitoring this summer and a report should be available in late July. |
Todd Blessing |
| 9/24/2009 |
Document, Report, or Work plan Review - other |
DEC staff reviewed BGES Inc.’s “Lake-Aire Alaska, LLC 4851 Aircraft Drive Anchorage, Alaska Water Monitoring” Report Dated July 2009. In July 2009, BGES Inc. (BGES) collected groundwater samples from monitoring wells MW-9 and MW-11 to be analyzed for GRO, DRO and BTEX. No contaminants of concern were detected from samples collected from monitoring well MW-11, which is located near the former leaking underground storage tank array. In samples collected from monitoring well MW-9 (near former fuel dispenser), GRO and benzene were detected at levels of 4.36 and 0.159 mg/L, respectively. Both of these values exceed DEC’s 18 AAC 75.345 Table C levels. BGES also collected pore water samples from three passive diffusion bags deployed in the surface water sediment interface. No contaminants (i.e. BTEX) were detected in these samples. DEC issued a letter commenting on the report and requesting Mr. Zelener' consultant conduct a groundwater monitoring event during the summer of 2014. Groundwater samples should be collected from both monitoring wells MW-9 and MW-11 to be analyzed for GRO and BTEX. Passive diffusion bags will not need to be deployed during this monitoring event. |
Todd Blessing |
| 6/30/2011 |
Update or Other Action |
Transferred Project Manager to IC Unit |
Bianca Reece |
| 11/9/2011 |
Institutional Control Compliance Review |
IC review conducted and tickler system updated regarding the 2014 groundwater sampling. |
Evonne Reese |
| 5/30/2014 |
Institutional Control Update |
Received a call from the consultant with BGES to inform me that they plan on doing groundwater monitoring this summer. |
Evonne Reese |
| 11/19/2014 |
Institutional Control Update |
An IC reminder letter was issued to the responsible party on this date. |
Kristin Thompson |
| 12/2/2014 |
Document, Report, or Work plan Review - other |
DEC staff reviewed BGES Inc.’s “Lake-Aire Alaska, LLC 4851 Aircraft Drive Anchorage, Alaska Water Monitoring” Report Dated November 2014. In June 2014, BGES Inc. (BGES) collected groundwater samples from monitoring wells MW-9 and MW-11 that were analyzed for GRO and BTEX. MW-9 showed benzene concentrations at 0.0151 mg/L which is above the cleanup level but has decreased significantly since the 2006 sampling. All other analyte concentrations were either below cleanup levels or non-detect. Groundwater monitoring should be performed again in five years’ time during the summer of 2019. |
Evonne Reese |
| 5/17/2018 |
Institutional Control Compliance Review |
IC compliance review conducted. Closure/IC Details updated. |
Kristin Thompson |
| 6/4/2019 |
Institutional Control Compliance Review |
An IC compliance review was completed and a reminder letter was issued. The letter also included a request for the required groundwater sampling to be scheduled for this summer. A monitoring report should be received by DEC by October 31, 2019. |
Evonne Reese |
| 7/24/2019 |
Institutional Control Update |
I provided approval to Zelener Group to remove a septic tank buried in the historic contamination area. The tank is popping up from the ground and causing driving hazards. The remaining issue at this site is groundwater contamination. The majority of contaminated soil was removed in the early 1990s so it is unlikely that contaminated soil will be encountered during the tank removal. |
Evonne Reese |
| 8/29/2019 |
Update or Other Action |
During the excavation of what was expected to be a septic tank, a set (2 or more) of undocumented (assumed to be old) regulated tanks were discovered along with possible soil contamination. The Underground Storage Tank Program was contacted and the tank removal process has been initiated. This record will be updated when more details are received. |
Evonne Reese |
| 2/1/2020 |
Document, Report, or Work plan Review - other |
Reviewed the UST Closure Report dated January 2020. (Added to the db on 3/2/2022.) This work was completed while working with the Underground Storage Tank unit within the Contaminated Sites Program. The two regulated USTs originally thought to be septic tanks were removed on November 1, 2019 and the majority of their associated piping was removed a few days later. Two stockpiles were created on site that totaled 75 cubic yards of potentially contaminated soil from the tank excavation pits. Additional contaminated soil was left in the ground and the extent of the contamination has not been defined on the north, south, and eastern edge of the excavation. There are elevated concentrations above the Method 2 Migration to Groundwater values for GRO, DRO, Ethylbenzene, Xylenes, Naphthlene, Trimethylbenzene, Methylnaphthalene, and Arsenic. The arsenic concentrations are thought to be representative of naturally occurring, background concentrations in this region. The groundwater was not sampled during this event even though it is assumed to have been impacted because of the shallow groundwater in the area. The piping at the eastern end of the tank and piping removal that split off of the “T” heading in a northwest direction was not removed and soils in this area were not evaluated. |
Evonne Reese |
| 6/14/2021 |
Document, Report, or Work plan Review - other |
Approved a stockpile sampling plan on this date. There are two stockpiles resulting from the discovery of two USTs which were removed in August 2019. |
Evonne Reese |
| 7/13/2021 |
Document, Report, or Work plan Review - other |
Sampling has been completed for the two stockpiles onsite and showed concentrations of DRO, benzo(a)anthracene, benzo(a)pyrene, and vinyl chloride that exceeded the ADEC cleanup criteria. BGES, Inc. contacted the Anchorage Regional Landfill to obtain approval for disposal of these contaminated soils. There are approximately 60 to 65 cubic yards. A representative of the landfill indicated that they can accept the soils with an ADEC approved Request to Transport form and copies of additional analytical data from the UST removal activities that have results for RCRA metals and PCBs. This information has been provided to the landfill by BGES. I provided BGES with a signed soil transport form on this date. The analytical data and summary table have been attached to this database record.
|
Evonne Reese |
| 2/4/2022 |
Document, Report, or Work plan Review - other |
Received the summary report of the characterization of the two soil stockpiles. |
Evonne Reese |
| 10/9/2024 |
Meeting or Teleconference Held |
Met with the property lessee, their consultant, and UST staff regarding the 2019 tank and piping systems removal. Some piping was left in place and still needs to be investigated. There is most likely contamination that will need to be addressed. Even though this infrastructure was in the same area as the old original tanks, a new site record will be created to track the characterization of the new source areas. Groundwater monitoring will be completed as part of that characterization and will also provide data for this site record for the long term groundwater monitoring requirement. |
Evonne Reese |
