| Action Date |
Action |
Description |
DEC Staff |
| 9/1/2014 |
Document, Report, or Work plan Review - other |
September 2014 Draft Work Plan for Limited Site Characterization prepared by S&W. No documentation thus far that shows that this plan was implemented. |
Keather McLoone |
| 1/27/2015 |
Potentially Responsible Party/State Interest Letter |
Potentially Responsible Party / State Interest letter sent to North Slope Borough by PERP staff Paul Lhotka. (McLoone edit - notification is to NSB Public Works). |
Mitzi Read |
| 3/20/2015 |
Document, Report, or Work plan Review - other |
Date of Point Lay Tank-Truck Loading Area, Site Characterization Work Plan. DEC approval letter sent on 4/3/15 documenting earlier conversation with consultant stating the a soil boring would be relocated to the area near the piping joint for piping that had yet to be removed. |
Keather McLoone |
| 4/6/2015 |
Document, Report, or Work plan Review - other |
Revised Point Lay TTLA Site Characterization workplan submitted but figure with still showing same locations as the draft. |
Keather McLoone |
| 4/27/2015 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff Paul Lhotka. Spill no. 08399900102; spill date = 1/1/2008; substance = diesel; quantity = unknown; source = buried fuel line from bulk fuel tank to dispenser. |
Mitzi Read |
| 4/27/2015 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 5/12/2015 |
Potentially Responsible Party/State Interest Letter |
|
Keather McLoone |
| 5/12/2015 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79763 name: Tank Truck Loading Area |
Keather McLoone |
| 6/9/2015 |
Update or Other Action |
Date of receipt of request to approve transport of 150 cubic yards of porous gravel material currently on-site contaminated with fuels to landfill to be staged for final disposition at landfill. Requested a copy of the Disposal of Low-Level Petroleum Polluted Soil Approval Request From for a Class III Landfill to be submitted with or before a request for approval to transport to landfill. |
Keather McLoone |
| 6/12/2015 |
Document, Report, or Work plan Review - other |
Date of document entitled Tank-Truck Loading Area, Point Lay, Alaska, Corrective Action Plan. Report includes results from borings advanced this season that have not been previously reported. Document includes a comprehensive site assessment summary, a corrective action plan, and planning information for the removal action. |
Keather McLoone |
| 6/16/2015 |
Update or Other Action |
Date of letter to NSB Landfill Manager requesting approval to dispose of excavated material at the landfill for use as a cap (estimated 125 cubic yards). The letter includes information about contaminant concentrations previously collected in the area to be excavated to demonstrate that they are below regulation limits described in the landfill Operations Plan. GRO up to 889 mg/kg, DRO up to 5,670 mg/kg, and RRO up to 336 mg/kg. |
Keather McLoone |
| 3/4/2016 |
Document, Report, or Work plan Review - other |
Reviewed the Site Characterization and Removal Action Report, dated February 18, 2016. Activities described in the report were completed in May and July 2015, and mainly consisted of a soil boring investigation and removal action. The objective of the 2015 work was to delineate and remove the contamination in the gravel pad at the Tank-Truck Loading Area (TTLA).
Twenty-two (22) soil borings were advanced at this site; 20 were placed within the TTLA footprint and two were placed south of the TTLA footprint. One of the borings placed south of the TTLA footprint was converted into a monitoring well (MW-01). Sample results from the soil boring investigation revealed that gasoline range organics (GRO) and diesel range organics (DRO) were present in the gravel pad above Method One cleanup levels within the TTLA footprint. Soil sample results from the two soil borings that were advanced south of the TTLA did not exhibit contaminant concentrations above Method One cleanup levels; however the groundwater sample collected from Monitoring Well MW-01 exhibited concentrations of DRO at 2.68 mg/l and benzene at 0.0141 mg/l. The ADEC groundwater cleanup levels for DRO and benzene are 1.5 mg/l and 0.005 mg/l, respectively.
Following the soil boring investigation, soil was excavated from the TTLA footprint. The excavation was approximately 25 feet long and 25 feet wide. The excavation depth was limited by permafrost or tundra, which was encountered between 4 and 5 feet below the ground surface. Roughly 130 cubic yards of impacted material was removed and transported to the landfill for use as cover.
Confirmation soil samples collected from the sidewalls of the excavation revealed that DRO impacted soil remains above Method One cleanup levels in the gravel material in almost every direction. A sample that was collected from the peaty material above the permafrost exhibited concentrations of GRO, DRO, 1,2,4-trimethylbenzene, and naphthalene at 9,690 mg/kg, 17,100 mg/kg, 491 mg/kg, and 285 mg/kg, respectively. The ADEC Method Two cleanup levels for GRO, DRO, 1,2,4-trimethylbenzene, and naphthalene are 1,400 mg/kg, 12,500 mg/kg, 49 mg/kg, and 42 mg/kg, respectively. It should be noted that the peat sample was not preserved until it arrived at the laboratory in Anchorage five days later. For this reason, ADEC considers this sample biased low. Soil samples collected from the frozen soil (permafrost) did not exhibit contaminant concentrations above ADEC cleanup levels.
ADEC requested a work plan for further delineation by May 1, 2016. |
Joshua Barsis |
| 6/6/2016 |
Document, Report, or Work plan Review - other |
Reviewed the work plan titled Site Characterization Work Plan Addendum 2016 – Further Characterization and Surface Water Monitoring, dated April 22, 2016. The objective of this work plan is to further delineate the extent of contamination and to ensure that contamination is not impacting surface water. |
Joshua Barsis |
| 1/17/2017 |
Update or Other Action |
Letter sent to NSB on this day detailing the current status/progress of 22 active contaminated sites, including this site. |
Joshua Barsis |
| 6/22/2017 |
Document, Report, or Work plan Review - other |
Reviewed the Site Characterization and removal Action Report Addendum, dated April 3, 2017. The described effort was completed between June and August 2016 and primarily consisted of excavating an additional 75 cubic yards of source material, advancing two downgradient test pits, collecting soil samples from the excavation and test pits, and collecting surface water samples from two locations. Soil results from the 2015 and 2016 effort generally conclude that contamination is limited to within the tank farm fence boundary and not migrating elsewhere, however the report was missing some information. ADEC requested a revised report by July 22, 2017 for further evaluation. |
Joshua Barsis |
| 11/20/2017 |
Update or Other Action |
Letter sent on this day as a follow up to the last version of this letter, dated January 17, 2017, and as a follow up to a meeting with NSB on November 17, 2017. This letter details the current status/progress of 23 active contaminated sites, including this site. |
Joshua Barsis |
| 11/16/2018 |
Update or Other Action |
Letter sent on this day as a follow up to the last version of this letter, dated November 20, 2017, and at the request of the North Slope Borough (NSB). This letter details the current progress of 24 active contaminated sites, including this site. |
Joshua Barsis |
| 2/19/2020 |
Enforcement Action |
Notice of Violation issued to NSB on February 18, 2020. See file for more information. |
Joshua Barsis |
