| Action Date |
Action |
Description |
DEC Staff |
| 6/9/1998 |
Document, Report, or Work plan Review - other |
On this date, DEC received Phase 2 Environmental Audit Kobuk Airport Kobuk, Alaska, dated December 2, 1997, and submitted by the ADOT&PF. The SREB building has historically housed diesel powered vehicles only; there is no gas powered vehicles or USTs/ASTs at the site. No GW exists on the airport property. Contamination on the gravel floor appears to be from de minimus spills of oil, hydraulic fluid, and antifreeze; no heavily stained areas and no petroleum odor was noted. Four composite samples collected: three inside the building (east end, center, west end), and one outside the building, 30 ft. to the north; collected at 2 ‘’ bgs, analyzed for RRO, contained up to 21, 700 mg/kg. Depth of contamination is unknown, but may extend down to at least 1.5 ft. in some areas. It is estimated that 100 cubic yards of impacted soil remains. Various remediation options were discussed including: On-site incineration, remove for thermal remediation or land farming, or incorporate/encapsulate into the floor. It appears the incorporate/encapsulate option may be chosen pending future constructive efforts of a concrete floor at the site. |
Grant Lidren |
| 6/6/2008 |
GIS Position Updated |
position verified with Google Earth Pro |
Grant Lidren |
| 5/14/2010 |
Update or Other Action |
A communication with Sam Meyers of ADOT&PF on this date, indicates the Kobuk SREB Upgrade is included in the Northern Region SREB Upgrades-Stg 1, which is a contingency in 2010 and is expected in 2012. |
Grant Lidren |
| 7/23/2010 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 74075 name: Spills and leaks |
Grant Lidren |
| 3/13/2012 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 74075 Spills and leaks. |
Grant Lidren |
| 1/7/2015 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 74075 Spills and leaks. |
Joshua Barsis |
| 12/28/2015 |
Update or Other Action |
File review on this day. No new information. |
Joshua Barsis |
| 5/3/2016 |
Update or Other Action |
Contacted Sam Myers of DOT. Upgrade to SREB is still planned but there is no proposed work schedule at this time. |
Nathan Maxwell |
| 3/16/2017 |
Meeting or Teleconference Held |
Meeting with ADOT, ADEC, and PDC to discuss construction work for summer 2017. |
Erin Gleason |
| 3/20/2017 |
Document, Report, or Work plan Review - other |
Received July 26, 2009 report from ADOT &PF. Nortech Environmental was contracted by the ADOT to sampled the dirt flooring of the Snow Removal Equipment building in Kotlik, Kobuk, and Brevig Mission. Floor is composed of 1.5-3 feet of gravel with an impermeable liner beneath. Surface stains were observed to cover 20% of the floor at the Kobuk SREB. In addition, Nortech suspects subsurface contamination not associated with the visible surface stains. Over the years, gravel has been added to the SREB to level the flooring, as such some of the contamination may be covered. At the time of sampling the ground was frozen below 6 inches. Field screening with PID showed contamination between 0-8.4 ppm. Additional colourmetric field screening was also conducted at this time. Three analytical samples were collected and resulted in DRO and RRO above ADEC cleanup levels. GRO and BTEX were detected but beneath ADEC cleanup levels |
Erin Gleason |
| 5/26/2017 |
Update or Other Action |
Received email from C. Johnston at ADOT, work is planned for summer 2018. |
Erin Gleason |
| 5/14/2018 |
Document, Report, or Work plan Review - other |
Received work plan from Wolverine Supply Inc on 3/29/2018. It is a combined work plan for Kotlik, Kobuk, and Brevig Mission SREB. ADEC has reviewed the work plan and requests revisions be made and the revised work plan be resubmitted. |
Erin Gleason |
| 5/22/2018 |
Meeting or Teleconference Held |
Meeting held with ADOT, ADEC, and Wolverine Supply Inc. to discuss revisions to the work plan, soil disposal methods, and possible site closure. |
Erin Gleason |
| 6/11/2018 |
Document, Report, or Work plan Review - other |
Received revised work plan from Wolver Supply Inc. ADEC will review and respond. |
Erin Gleason |
| 6/12/2018 |
Document, Report, or Work plan Review - other |
ADEC has reviewed the revised work plan and provided comments to ADOT and their QEP via email. |
Erin Gleason |
| 6/22/2018 |
Document, Report, or Work plan Review - other |
Received revised work plan from Wolverine Supply Inc. Sent email to clarify a few or the revisions and comments. Work plan is not approved. |
Erin Gleason |
| 7/3/2018 |
Site Characterization Workplan Approved |
Received final revised work plan from Wolverine supply. Work plan is now approved. |
Erin Gleason |
| 10/1/2018 |
Update or Other Action |
ADEC approves the transport of 0.70 cyd to Cadman Soil Remediation in Everett, WA |
Erin Gleason |
| 6/26/2019 |
Site Characterization Report Approved |
Received Site Characterization Report for ADOT Northern Region SREBs on 1/30/2019. ADEC has reviewed the report and request revisions on 4/12/2019. ADEC received the revised report on 6/11/2019. All requested changes were made and it is now approved. |
Erin Gleason |
| 10/3/2019 |
Update or Other Action |
ADEC sent closure evaluation letter to ADOT on this date. The site is not currently eligible for closure because the extent of diesel contamination in surface soil has not been determined. Next step for site would be to submit a work plan for soil characterization. |
Erin Gleason |
| 1/11/2023 |
Update or Other Action |
Temporary Water Use Authorization granted on this date by DNR. The permit allows the withdrawal of water from the Oxbow Lake near the Kobuk Airport associated with the septic system replacement project. The maximum daily withdrawal is 3,000 gallons per day, with a seasonal amount of 90,000 gallons with a combined project maximum not to exceed 270,000 gallons over three years. |
Naomi Mason |
