| Action Date |
Action |
Description |
DEC Staff |
| 7/25/2008 |
Document, Report, or Work plan Review - other |
Date of submittal entitled Alaska Department of Environmental Conservation Request for Additional Soil-Sample Information, North Slope Borough Contaminated Sites which covers Anaktuvuk Pass, Point Hope, Point Lay, and Wainwright. Investigation at Old BIA Tank Farm found staining, DRO at 7,310 mg/kg, and potential benzene contamination (MRL above cleanup level). Tanks are still in place. |
Keather McLoone |
| 2/27/2009 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 3/5/2009 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 78724 name: Old BIA Tank Farm |
Bill O'Connell |
| 3/9/2009 |
Potentially Responsible Party/State Interest Letter |
|
Keather McLoone |
| 12/8/2011 |
Meeting or Teleconference Held |
Meeting today with NSB to discuss site status and potential future activities at the site. Sampling/delineation needed. |
Bill O'Connell |
| 11/14/2012 |
Meeting or Teleconference Held |
O'Connell met with NSB to discuss site status and potential future activities at the site. Tanks were removed in late summer 2012, site will be delineated in summer 2013. |
Keather McLoone |
| 6/3/2013 |
Document, Report, or Work plan Review - other |
Reviewed work plan for Former BIA School Tank Farm in Point Hope. The 19 ASTs formerly on this property have been removed so the site is now available for characterization. Boreholes will be advanced using a hand or power auger and up to 24 soil samples will be collected in an effort to delineate the nature and extent of contamination. |
Bill O'Connell |
| 5/15/2015 |
Document, Report, or Work plan Review - other |
Date of receipt via email of Point Hope Bureau of Indian Affairs (BIA) Former Tank Farm, Site Characterization Work Plan. A total of 57 borings will be advanced, 3 to be converted into monitoring wells to be sampled later in the season. Two samples will be collected from each of the 57 soil borings for fuel parameters (GRO, DRO/RRO, VOCs, and 10% PAHs). Same analytical suite for groundwater samples.
|
Keather McLoone |
| 3/10/2016 |
Document, Report, or Work plan Review - other |
Reviewed the document dated March 8, 2016 and titled Point Hope Old BIA Tank Farm Site Characterization Report – Draft. Activities described in the report included surface and subsurface soil and groundwater sampling. One hundred twenty-four (124) soil samples were collected from 57 soil borings that were advanced during this investigation. Three of the soil borings were completed as groundwater monitoring wells (MW-01 through MW-03). Boreholes ranged in depth down to a maximum depth of 7 feet below the surface. Native material, such as the tundra mat and permafrost were not encountered, likely because the area is constructed out of cobbles with no binding material (organics).
Sample results showed that contamination is present in the surface and subsurface pad material and in the active layer groundwater. Contaminated pad material extends beyond the footprint of the former tank farm and is migrating via active layer groundwater. The extent of contamination has not been delineated.
Diesel range organics (DRO) was present in soil up to 4,300 mg/kg; however the majority of samples had detections of DRO below 1,000 mg/kg. The Method One cleanup level for DRO is 200 mg/kg. DRO was present in samples collected from two monitoring wells (MW-01 and MW-03) at 1.96 mg/l and 13.8 mg/l, respectively. The water sample collected from Monitoring Well MW-03 also exhibited a concentration of RRO at 1.16 mg/l. The ADEC groundwater cleanup levels for DRO and RRO are 1.5 mg/l and 1.1 mg/l, correspondingly. It should be noted that free product was encountered in Monitoring Well MW-03.
Recommendations were provided in the report and included further characterization, excavation and land-farming of impacted pad material, and groundwater monitoring. ADEC agrees with this recommendations, but also requests that additional monitoring wells be installed to determine the horizontal extent of impacts to groundwater. ADEC requested a work plan by May 1, 2016.
|
Joshua Barsis |
| 6/6/2016 |
Document, Report, or Work plan Review - other |
Reviewed the document dated April 27, 2016 and titled Point Hope Old BIA Tank Farm Site Characterization Work Plan Addendum 2016 – Further Characterization and Groundwater Monitoring. Soil and water samples will be collected from several soil borings that will be completed as monitoring wells. |
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 |
| 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 |
| 6/25/2019 |
Update or Other Action |
Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map. |
Rebekah Reams |
| 2/19/2020 |
Enforcement Action |
Notice of Violation issued to NSB on February 18, 2020. See file for more information. |
Joshua Barsis |
| 3/3/2022 |
Update or Other Action |
ADEC provided comments on the modifications by UMIAQ Environmental to the approved 2016 workplan. |
Lisa Krebs-Barsis |
| 1/23/2024 |
Document, Report, or Work plan Review - other |
Reviewed the Point Hope Old BIA Former Tank Farm Site Characterization report dated April 11, 2023. Site characterization activities took place in September and October 2022 and included installing and sampling nine soil borings, completing each boring as a monitoring well, sampling the groundwater, and handling investigation derived wastes (IDW).
The soil samples collected from the nine borings were submitted to the laboratory for analysis of diesel range organics (DRO), residual range organics (RRO), and volatile organic compounds (VOCs). The soil samples from five of the nine borings had DRO concentrations reported above the DEC Method One CUL. Soil samples from seven of the borings also had one of more analytes detected above the Method Two CULs for three VOCs including naphthalene, 1,2-dibromoethane, and benzene. The lateral and vertical extent of soil contamination to the west and southeast of the site has not been fully delineated.
The groundwater samples from eight wells were submitted for analysis of DRO, RRO, VOCs, and polynuclear aromatic hydrocarbons (PAHs). Each of the wells sampled had reported DRO concentrations above the DEC groundwater CUL. Additionally, RRO, two VOCs (1,2,4-trimethylbenzene and naphthalene), and two PAHs (1-methylnaphthalene and naphthalene) were detected in the samples above the DEC CULs. The extent of groundwater contamination has not been delineated at the site.
The IDW from the investigation included nine 55-gallon drums of soil cuttings and two 55-gallon drums of IDW water. The DEC approved the Contaminated Media Transport and Treatment or Disposal Forms for the IDW on August 18, 2023, after the date of this report. The IDW was removed from Point Hope on September 26, 2023, and is pending final disposal.
|
Andrea Carlson |
