| Action Date |
Action |
Description |
DEC Staff |
| 2/14/2011 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 3/25/2011 |
Document, Report, or Work plan Review - other |
Review and comment on a work plan was provided via email on this date for a site investigation at the Chief Paul Memorial School Renovation project. |
Keather McLoone |
| 3/28/2011 |
Update or Other Action |
Email update from Oasis on this date:
This weekend, drillers encountered methane gas, which ignited in a newly excavated hole when drillers started using a nearby torch. Based on geotechnical logs, there is no reason to put in monitoring wells. Near the sewage area, really nasty lagoon water pours into the borings. Certainly not an indicator of a water table, and nothing we want to sample.
Away from the lagoon the soil is generally cold, but not frozen because of freezing point depression. Soil near the building is frozen because of thermopiles. There are indications of perched water (frozen) and possibly water about 20' below grade. In speaking with Discovery and Golder, it was decided that installing monitoring wells would be a waste of time. Consequently, they were going to screen the borings and collect soil samples, targeting areas above possible water and screening entire soil cores.
There is supposed to be a really smelly fuel spill area near the church, downhill (east) from the tank farm. We are going to push a boring between the suspect area and the tank farm. Therefore, there will be four holes: two near the tank farm (east and west), one on the southwest part of the site (away from the lagoon), and one generally northeast of the lagoon and south of the school. The latter two borings are to look for any subsurface evidence of fuel migration. There isn't much opportunity to get anything closer in the middle of the site because of all the buildings.
We should be able to assess if the smaller tanks are a problem next summer.
We will add DRO to the SPLP analysis. The thought was that potential impact to surface water would be the main driver; thus, the PAH's. At this point, contamination has not yet been confirmed, but is suspected.
|
Keather McLoone |
| 6/20/2011 |
Document, Report, or Work plan Review - other |
Review of document entitled "Work Plan, Soil Characterization, Chief Paul Memorial School Renovation". |
Keather McLoone |
| 8/26/2011 |
Meeting or Teleconference Held |
Meeting with Oasis to discuss possibility of biogenic contribution to diesel range contamination at this site. Suggested collecting samples for evaluation of biogenic contribution using silica gel cleanup. |
Keather McLoone |
| 10/28/2011 |
Update or Other Action |
Review of chromatograms and data received to evaluate biogenic contribution. Samples were split, and results were compared when using and when lacking silica gel cleanup. |
Keather McLoone |
| 11/21/2011 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79211 name: various ASTs |
Keather McLoone |
| 1/13/2012 |
Document, Report, or Work plan Review - other |
Completed review of Soil Characterization Report and Remediation Work Plan. This document covers investigative work for April, June, and October 2011.
In April, 5 geoprobe borings were advanced in order to take advantage of a drill rig and frozen ground to drive equipment upon. Four borings were advanced at the school site and one at the landfill. Samples were analyzed for GRO, DRO, RRO, and BTEX with no April samples exceeding Method Two criteria.
In June, 20 samples were collected from around the 13 day tanks and at the "new" tank farm area (which appears to "currently" have tanks). These were analyzed for the same constituents as the April samples. Two samples were also analyzed for PAH and SPLP PAH. GRO and BTEX were not found above Method Two cleanup criteria. DRO is the primary contaminant of concern and exceeded Method Two in several areas.
In October, additional samples were analyzed for evidence of biogenic hydrocarbon contribution by sampling locations with and without silica gel cleanup.
The remedial plan calls for excavating to 2 feet bgs around tanks 3 and 11 and disposing of soil at landfill for use as cover. Area around tank 6 had highest [DRO] and will be excavated and disposed of outside the community. Material above the former tank liner is assumed to be contaminated but will be tested before it is determined whether this material is suitable for disposal at the local landfill. Soil below the tank farm will be field screened to determine if more effort is needed. If soil cuttings are removed from 2-7' BGS around tanks 3, 7, 8, 9, & 11, it will be disposed of at the local landfill. Overall, no soil will be excavated below 2' bgs, and confirmation sampling will not occur below 2' bgs. |
Keather McLoone |
| 8/15/2012 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79211 various ASTs. Updated the ETM and reduced the surface water exposure pathway from High Potential Exposure to Low Potential Exposure based on water quality testing and location of school/village drinking water sources that are upgradient from source areas. |
Richard Bernhardt |
| 9/18/2012 |
Site Visit |
Conducted site visit to Chief Paul Memorial School during CIAP inspection of the village landfill. Tundra/permafrost was heavily impacted from ongoing school construction activity, but evidence of the historic spill was lacking on school grounds.
However, profuse sheen was noted (and photographed) entering the Kugkaklik River, but it did not appear to originate from the school. Source was likely other ASTs or nearby construction equipment/operations. PERP was notified for further investigation. |
Grant Lidren |
| 11/6/2012 |
Meeting or Teleconference Held |
Spoke with Steve Witzmann (OASIS/ERM) and learned that OASIS/ERM excavated around three day tanks just before freeze-up last fall (2012). The one remaining area (lined tank farm) is scheduled to be addressed in spring 2013. He said the contaminated area in the tank farm has a gravel pad, so contamination would migrate downward. He will send an interim work report via e-mail as soon as possible. |
Richard Bernhardt |
| 12/23/2013 |
Document, Report, or Work plan Review - other |
On this date, DEC received the Soil Remediation Summary Report for this site. The report documents the soil remediation activities for tank numbers 3, 6, 11, and the schools former tank farm prior to the completion of the school renovation project. Because permafrost is considered to be sporadic in Kipnuk, the depth of excavation at each tank location was limited to two feet bgs to preserve the thermal properties of the soil. Confirmation soil samples were collected from each of the tank excavation locations and were analyzed for GRO, DRO, and RRO. At least one soil sample from each excavation was analyzed for PAHs.
Three confirmation soil samples were collected from the excavation at tank number 3 and exhibited a maximum concentration of DRO at 2,550 mg/kg, RRO at 16,400 mg/kg, and benzo[a]pyrene at 0.760 mg/kg. Confirmation soil samples collected from tank number 11 did not exhibit any analytes that exceeded the most stringent ADEC cleanup criteria. Confirmation soil samples collected from tank number 6 exhibited a maximum concentration of DRO at 6,170 mg/kg, RRO at 14,500 mg/kg, and several PAHs that exceeded the ADEC approved cleanup levels. Confirmation soil samples collected from the school former tank farm exhibited a maximum concentration of DRO at 1,360 mg/kg and RRO at 4,140 mg/kg.
The soil samples collected from the schools former tank farm were also analyzed using silica gel. The silica gel chromatographs were examined by DECs internal chemist. The chemist indicated that biogenic interference may have contributed to the high RRO concentrations. |
Joshua Barsis |
| 12/24/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79211 various ASTs. |
Joshua Barsis |
| 12/31/2013 |
Update or Other Action |
On this day, ADEC sent a letter requesting additional site work and documentation of the current groundwater conditions in Kipnuk. |
Joshua Barsis |
| 1/30/2014 |
Update or Other Action |
On January 30, 2014, the ADEC received a letter that documented current groundwater conditions in Kipnuk, and memorialized the history of this site. |
Joshua Barsis |
| 4/2/2014 |
Cleanup Complete Determination Issued |
|
Joshua Barsis |
| 4/2/2014 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Joshua Barsis |
| 10/6/2014 |
Institutional Control Update |
Current project manager chooses to retain management of the site at this time. |
Kristin Thompson |
| 5/27/2015 |
Update or Other Action |
Transfer from Anchorage to Fairbanks 5/27/15 |
Susan Carberry |
| 4/26/2016 |
Update or Other Action |
Site assigned to project manager for identification of PRPs, evaluation of cleanup progress, and follow up. |
Fred Vreeman |
| 2/26/2018 |
Update or Other Action |
Site management name changed from Griswold to IC Unit. |
Evonne Reese |
| 4/18/2018 |
Institutional Control Compliance Review |
IC compliance review conducted. Closure/IC Details updated. Reminder system set to send a five-year review letter next year (2019) if we have not received the required reporting by then. |
Kristin Thompson |
| 6/18/2019 |
Institutional Control Update |
An Institutional Controls reminder letter e-mailed to the responsible party on this date. |
Mossy Mead |
| 6/28/2019 |
Update or Other Action |
Letter provided to BIA providing a list of 31 sites where BIA is a PRP and requesting a meeting to discuss long-term planning for cleanup at these sites. |
Gretchen Caudill |
