| Action Date |
Action |
Description |
DEC Staff |
| 3/4/2008 |
Spill Transferred from Prevention Preparedness and Response Program |
Site transferred from PERP staff Young Ha. Spill Number = 07239923201; Spill Date = 8/20/07; Quantity = Unknown; Substance = Used Oil. |
Mitzi Read |
| 3/18/2008 |
Site Added to Database |
Site added to the database. |
Mitzi Read |
| 3/18/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Mitzi Read |
| 3/28/2008 |
Update or Other Action |
ADEC letter issued approving disposal of investigation derived waste (IDW).
|
Eileen Olson |
| 5/15/2008 |
Update or Other Action |
Received Proposed Work Plan for Soil Excavation and Remediation for Airport Road Car Storage/Agen's Automotive. Excavation is proposed for three areas, with approval requested in advance to transport an expected 80 cubic yards of DRO-contaminated soil to ASR for thermal remediation. |
Eileen Olson |
| 5/19/2008 |
Update or Other Action |
Approved work plan dated 5/15/2008. |
Eileen Olson |
| 5/27/2008 |
Update or Other Action |
ADEC letter clarifying pre-treatment sampling conditions for Alaska Soil Recycling, via the consultant. |
Eileen Olson |
| 3/18/2009 |
Meeting or Teleconference Held |
Met with consultant and received "Report on 2008 Remedial Actions" dated March 17, 2009. The report documents excavation of soils at the former waste oil storage shed and investigation of soil at the outflow of a floor drain on the east side of the building. Elevated benzene levels remain in peat at a depth of 4 feet, east of the building on site. Consultant will discuss options and scheduling for additional investigation and groundwater monitoring with owners, and will propose next steps. |
Eileen Olson |
| 6/1/2010 |
Update or Other Action |
Plan submitted electronically titled "Soil and Groundwater Investigation Activities, 737 East International Airport Road, Anchorage, Alaska" dated May 28, 2010 and prepared by BGES, Inc. The plan proposes to drill five borings, with one to be completed as a monitoring well. The new monitoring well (MW10) will be located south of former monitoring wells MW7 and MW6 which were located within the drum storage area but decommissioned when additional contaminated soil was excavated. MW10 and two of the existing monitoring wells, MW-5 and one of the three monitoring wells (MW-1, MW-2, and MW-3)located near the southeastern corner of the property will be sampled. Note: There are 7 wells at the site; these are MW1, MW2, MW3, MW4, MW5, MW8 and MW9. |
Eileen Olson |
| 6/25/2010 |
Document, Report, or Work plan Review - other |
DEC plan approval for plan submitted June 1, 2010, with condition that upper 3 feet of 5 proposed soil borings be field screened. |
Eileen Olson |
| 1/4/2011 |
Update or Other Action |
Received report prepared by BGES "2010 Site Characterization, 737 East International Airport Road...December 2010". The report includes a Conceptual Site Model. |
Eileen Olson |
| 10/17/2011 |
Document, Report, or Work plan Review - other |
ADEC review of "Site Characterization, 737 East International Airport Road...December 2010" and cost recovery notification. Review comments note that site characterization to date is not sufficient to demonstrate that contaminants have not migrated beyond the western property
boundary. ADEC requested the following: Submittal of a workplan by November 15, 2011 to include sampling monitoring wells MW2, MW5 and MWI0 for benzene and DRO; installation of two additional borings to be completed as monitoring wells at a minimum depth of eight feet bgs, at designated locations. |
Eileen Olson |
| 11/7/2011 |
Site Characterization Workplan Approved |
Approved plan for November 2011 and May 2012 work; 2011 work will entail sampling 3 groundwater monitoring wells and checking water levels in all wells at the site; 2012 work will entail advancing and sampling two soil borings, completing the two borings as monitoring wells, and sampling the 2 new wells and 3 existing wells for DRO and volatiles. |
Eileen Olson |
| 3/9/2012 |
Document, Report, or Work plan Review - other |
Review letter issued for "November 2011 Groundwater Monitoring Report ... December
2011". The letter reiterated ADEC's October 17, 2011 review letter, noting that two phases of work were requested, with the first to be done in November 2011, which was sampling 3 monitoring wells and measuring the elevation of all wells to document current groundwater flow direction. The second phase of work, installing two additional borings to be completed as monitoring wells, has yet to be done and was requested by June 15, 2012. |
Eileen Olson |
| 4/13/2012 |
Document, Report, or Work plan Review - other |
Approved request to delay replacement of monitoring well caps up to an additional 2 weeks until April 30, 2012, and to delay repair and resurveying of wells with the new completion date no later than June 15, 2012. |
Eileen Olson |
| 8/15/2012 |
Meeting or Teleconference Held |
ADEC staff met with owners and consultant BGES representatives to discuss remaining work to achieve site closure. Received most of data for most recent work and monitoring event including installation of two monitoring wells, MW11 and MW12 in May 2012. Report of that work and a plan for continued groundwater monitoring will be submitted soon. |
Eileen Olson |
| 8/28/2012 |
Document, Report, or Work plan Review - other |
ADEC plan review letter sent "Approval of groundwater monitoring and decommissioning plan received 8/27/2012. The approved plan includes (1) conducting two groundwater monitoring events, one in fall 2012 and the second in spring 2013, with ADEC's approval noting that "Based on the results of the groundwater monitoring ADEC will determine whether one or more additional soil borings completed as monitoring wells will be required within the southwestern portion of the site or if the site can be granted "Cleanup Complete with Institutional Controls" status" and (2)decommissioning of four monitoring wells; MW1, MW3, MW8, and MW9 during September or October 2012. |
Eileen Olson |
| 3/3/2015 |
Document, Report, or Work plan Review - other |
Approved "Work Plan for Additional Soil and Groundwater Investigation Activities and Decommissioning One Monitoring Well" dated February 24, 2015. Work is to begin in May 2015. |
Eileen Olson |
| 2/8/2016 |
Document, Report, or Work plan Review - other |
ADEC review letter dated 2/8/2016 reviews the "June 2015 Additional Investigation Activities" report dated October 15, 2015. Following receipt of the report BGES notified ADEC that a monitoring event would take place on 11/4/2015. ADEC's letter requested the analytical results for that sampling event and approved the plan to continue to monitor wells at the site twice yearly.
|
Eileen Olson |
| 2/12/2016 |
Document, Report, or Work plan Review - other |
ADEC received and reviewed analytical results for the November 2015 sampling event. Monitoring wells MW5 and MW10 - MW14 were sampled on November 4th and 5th, 2015 with results similar to those from the June 2015 event. |
Eileen Olson |
| 9/29/2016 |
Document, Report, or Work plan Review - other |
Approved plan for sampling according to previously approved work plan dated Feb. 24, 2015 for ongoing groundwater monitoring activities. |
Eileen Olson |
| 5/29/2019 |
Document, Report, or Work plan Review - other |
ADEC provides comment on the work plan titled "Work Plan for Characterizing Soils Prior to Parking Lot Repairs, 737 East International Airport Road, Anchorage, Alaska" dated May 21, 2019. The RP is planning to re-pave the parking lot and may need to remove some soils. The goal of this work plan is to pre-characterize soils in place to help determine disposal options. |
Kara Kusche |
| 6/11/2019 |
Site Characterization Workplan Approved |
ADEC approves the work plan titled "Revised Work Plan for Characterizing Soils Prior to Parking Lot Repairs, 737 East International Airport Road, Anchorage, Alaska" dated June 6, 2019. |
Kara Kusche |
| 6/20/2019 |
Site Characterization Report Approved |
ADEC approves the report titled "2016 Groundwater Monitoring Report" dated April 2017. This report documents benzene above CULs in MW10 and MW5, and DRO above CULs in MW11. All other contaminants and wells were below CULs. |
Kara Kusche |
| 9/20/2021 |
Update or Other Action |
Consultant, BGES reached out to ADEC to request a reduction in groundwater monitoring sampling for the 2021 season. Consultant is asking to not sample MW-2, MW-12, MW-13, and MW-14, as these wells have demonstrated three quarters of sampling history in which contamination was below ADEC cleanup levels. |
Flannery Ballard |
| 9/27/2021 |
Update or Other Action |
The ADEC issued a letter approving to not sample MW-2, but has requested that MW-12, MW-13, and MW-14 be included in the sampling event in 2021 as trends for benzene and DRO were increasing the last time the wells were sampled in 2016. The ADEC also requested PAHs tests to be run, and for groundwater elevations to be surveyed as this has not not been done in five years. |
Flannery Ballard |
| 6/7/2023 |
Site Characterization Report Approved |
The ADEC CSP reviewed the “Airport Road Car Storage, LLC, 737 East International Airport Road Anchorage, Alaska, 2021-2022 Groundwater Monitoring Report” dated December 2022, from BGES Inc.
In October 2021 groundwater samples were collected from MW-5, MW10, MW11, MW12, MW13, and MW14. Samples were analyzed for diesel range organics (DRO), benzene, toluene, ethylbenzene, and total xylenes (BTEX), and polycyclic aromatic hydrocarbons (PAHs). DRO was detected in MW10, MW11, MW12, and MW14 at concentrations greater than the ADEC cleanup level. In addition, benzene was detected in MW-10 (primary and duplicate) at concentrations greater than the ADEC cleanup level. The remaining tested analytes were either not detected or were detected at concentrations less than the applicable cleanup levels. Groundwater flow direction is to the southeast. In May 2022 groundwater samples were collected from MW14 (primary and duplicate) and analyzed for DRO, DRO with Silica Gel, and BTEX. DRO was detected in the duplicate sample at concentrations greater than the ADEC cleanup level. The remaining tested analytes were either not detected or were detected at concentrations less than the applicable cleanup levels. The next groundwater sampling event is scheduled to take place in 2026.
|
Alena Voigt |
