| Action Date |
Action |
Description |
DEC Staff |
| 9/24/1984 |
Preliminary Assessment Approved |
Preliminary assessment by Tetra Tech, Inc., report dated 9/25/84, found that the site may have been a major waste disposal site for the Prudhoe Bay area in the 1960s and 1970s and recommended that water and soil sampling be conducted to determine if waste materials were leaching into the Sagavanirktok River or migrating offsite. |
Former Staff |
| 8/22/1985 |
Site Characterization Report Approved |
(Old R:Base Action Code = SI - Site Investigation). Site Investigation included the landfill area and a hydrocarbon fire-fighting training area southwest of the landfill. Stained soil was observed in a 200' x 200' feet area at the fire training area. Sediment samples included the river and the landfill area which were analyzed for the full range of EPA priority pollutants. No priority pollutants were found in the samples above detection limits. SI concluded that no release of hazardous substances from the landfill has been documented. |
Former Staff |
| 4/9/2004 |
Update or Other Action |
Site status changed to Non-Qualifying.
In 1981 and 1982, the site was apparently covered with soil, and the landfill was officially closed in 1985. The DEC contaminated sites database references a sampling event and site inspection conducted in 1985, which found no release of hazardous substances.
Although the Sand Dunes Landfill was a solid waste site it was mistakenly included on the Exhibit D.2 Charter list. It is possible the Sand Dunes Landfill may have been confused with the Surfcote Pad and added to the Exhibit D.2 Charter list instead of the Surfcote Pad. Therefore, the Sand Dunes Landfill site will also be removed from the Exhibit D.2 Charter list. See letter dated April 9, 2004 for additional details. |
Linda Nuechterlein |
| 2/22/2008 |
Update or Other Action |
Received "2007 Sag River Dunes Solid Waste Landfill Progress Report" from BP dated 2-8-08 that provides rehabilitation information on this site through 2007. Several site inspections were conducted in summer 2006 and a rehabilitation plan for the northeast corner of the landfill cap was developed. Several wooden windbreaks were removed from that area and 3 inches of gravelly topsoil material was spread over the area to provide additional cover and improve soil conditions for revegetation. The majority of the landfill cap has maintained a stable cover and is revegetated with species typical of sand dune habitat. The plan of treatment and monitoring is listed through 2017, it shows that the 2007 work has been completed, in 2008 they will apply fertilizer to the 2006 / 2007 area where 'sprigging' occurred. In 2009 and 2012 they will continue monitoring and reporting with a final report planned for 2017. |
Pam Clemens |
| 3/2/2011 |
Update or Other Action |
Date of draft RCRA Facility Investigation 2011 Work Plan Sand Dunes Landfill Solid Waste Management Unit. A June 2011 version of the RFI Work Plan was also submitted. |
Keather McLoone |
| 3/7/2011 |
Document, Report, or Work plan Review - other |
Reviewed work plan for hydrologic study, debris inventory, habitat mapping, and soil properties study at Sand Dunes Landfill. This investigation is part of the greater RCRA Facility Investigation Work Plan to be submitted under separate cover. Activities conducted as part of this study in 2011 will include the installation of thermistor wells, pore water monitoring, data logger installation and limited sampling. Analytical sampling of soil and pore water will be dependent upon EPA approval of Tier I and Tier II screening levels for the overall RCRA Administrative Order on Consent. |
Bill O'Connell |
| 12/27/2011 |
Document, Report, or Work plan Review - other |
Reviewed RCRA Facility Investigation (RFI) Comprehensive Work Plan for Sand Dunes Landfill (SDL). The RFI will consist of three phases, the first of which was executed in 2011 with the hydrologic study. Phase II will be executed in 2012 and will consist of continuation of the hydrologic study, investigation of perimeter areas, and characterization of two areas known as Areas B and C. Activities to be conducted during the third phase will be determined by the results of the first two phases. The objective of the RFI is to evaluate the nature and extent of contamination and determine whether corrective action is needed to address any potential releases from the site. For the purposes of the RFI, the SDL has been divided into three areas; Area A, which was the area most heavily used for landfill and incineration, Area B which is northwest of Area A and contains several pits that may have been used to dispose of oil field waste, Area C, which is northeast of Area A near Surfcote Pad and has several buried metal anomalies, and the Eastern Operating Area Fire Training Ground (EOA FTG) an existing contaminated site within the boundaries of the SDL that was used for fire training from 1972 to the present. To achieve the Phase II objectives, soil borings will be advanced and sampled and may be completed as monitoring wells where appropriate. Surface debris will be inventoried, monitoring wells will be sampled, thermistors will be installed, and basic groundwater geochemistry parameters will be measured. Information collected during this and other investigation will be used to update the site conceptual model as appropriate. |
Bill O'Connell |
| 3/1/2012 |
Update or Other Action |
Document dated March 2012 - RCRA Facility Investigation Comprehensive Work Plan Former Sand Dune Landfill Project Area |
Keather McLoone |
| 5/1/2012 |
Update or Other Action |
2011 RCRA Facility Investigation Hydrologic Study Report Sand Dunes Landfill dated May 2012. |
Keather McLoone |
| 12/12/2012 |
Update or Other Action |
Date of Sand Dunes Landfill 2012 EPA Seattle Presentation. |
Keather McLoone |
| 4/1/2013 |
Update or Other Action |
RCRA Facility Investigation 2012 Interim Summary Report Former Sand Dunes Landfill dated April 2013. |
Keather McLoone |
| 4/1/2013 |
Update or Other Action |
RCRA Facility Investigation 2013 Work Plan Addendum Former Sand Dunes dated April 2013. |
Keather McLoone |
| 6/30/2014 |
Document, Report, or Work plan Review - other |
Date of receipt of 2013 Interim Summary Report for Former Sand Dunes Landfill. A complete pdf disc with tables supplied electronically only is included along with the hardcopy. During the 2013 effort, 53 soil borings were advanced in order to install 27 thermistors and 26 monitoring wells. Soil samples were collected from 23 soil boring locations and 19 new and 15 existing suprapermafrost groundwater samples were collected. Additional data was collected for the hydrologic study at 64 locations involving thermistors and pressure transducers. The CSM was updated. Concerns identified were a petrogenic sheen observed on shallow surface water located north of the Fire Training Grounds and TAH exceedance in a well nearby and upgradient (MW-79). Also, erosion was noted, repaired, and described as possibly associated with fire training activities. Recommendations are included for additional work in 2014. |
Keather McLoone |
| 9/1/2014 |
Update or Other Action |
Former Sand Dunes Landfill 2014 RCRA Facility Investigation; 2014 Work plan Addendum dated September 2014. |
Keather McLoone |
| 4/1/2015 |
Document, Report, or Work plan Review - other |
Date of cover letter to EPA accompanying the 2014 Interim Summary Report. MW-79 (2013 location with sheen and TAH exceedance) exceeded TAH criteria again in 2014. In response to 2013 sheen observations on some surface water bodies at SDL, two surface soil and co-located surface water samples were collected downgradient from MW-79 but these samples were not analyzed for PFCs. |
Keather McLoone |
| 8/30/2016 |
Document, Report, or Work plan Review - other |
Reviewed the RCRA Facility Investigation 2016 Work Plan Addendum, dated July 2016 for the BPX Sand Dunes Landfill (former ARCO) site. ADEC letter with comments send on August 30, 2016. |
Joshua Barsis |
| 11/30/2016 |
Document, Report, or Work plan Review - other |
Reviewed and provided comments on the Draft RCRA Facility Investigation 2015 Interim Summary Report, dated October 2016. Primary activities included collecting water samples from 57 of 88 planned monitoring wells and 21 of 23 planned surface water locations. 31 of the planned wells and 2 of the planned surface water locations were dry or filled with ice. A hydrologic study was also completed during the 2015 field effort, and consisted of installing time-lapse cameras to observe surface flow pathways. All field activities were completed between May and September 2015. |
Joshua Barsis |
| 5/11/2017 |
Document, Report, or Work plan Review - other |
Reviewed and provided comments on the Draft 2016 RCRA Facility Investigation Interim Summary Report, dated March 2017. Activities included collecting water samples from 5 monitoring wells and 1 surface water location, collecting surface soil samples from the landfill CAP and area, and continuation of the hydrologic study using time-lapse cameras to observe surface flow pathways. Further soil and groundwater evaluation is necessary. |
Joshua Barsis |
| 4/12/2018 |
Document, Report, or Work plan Review - other |
Reviewed and provided comments on the 2017 ADEC Solid Waste Appendix II Sampling Report, dated March 2018. Completed activities mainly included sampling 14 monitoring wells for Appendix II constituents. |
Joshua Barsis |
| 8/16/2018 |
Document, Report, or Work plan Review - other |
Reviewed the RCRA Facility Investigation 2018 Work Plan Addendum, dated August 2018. SWP and CS provided comments regarding the work plan in a letter dated August 16, 2018. Please see file for the letter. |
Joshua Barsis |
| 7/10/2019 |
Document, Report, or Work plan Review - other |
Date of receipt of document: 2019 ADEC Solid Waste Appendix II Sampling Work Plan |
Joshua Barsis |
| 7/17/2019 |
Document, Report, or Work plan Review - other |
Reviewed "RCRA Facility Investigation 2019 Work Plan Addendum Source Area Characterization" dated July 2019. The objective of the 2019 investigation is to characterize contamination in the landfill (source area). Based on the results of this investigation, recomendations will be made for either Removal of the landfill, or Capping/restoration. |
Joshua Barsis |
