| Action Date |
Action |
Description |
DEC Staff |
| 3/11/2011 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 6/6/2014 |
Update or Other Action |
1994 PA/SI – No visible soil stains or surface debris was found on site, a metal detection survey indicated no buried materials in areas E and G. 2 surface debris were noted in area F. These observations suggest that these areas may have served primarily as gravel borrow pits. Consequently, no environmental samples were collected. |
Anna Iverson |
| 6/6/2014 |
Update or Other Action |
1999 RI – 2 soil boring were to be drilled at each disposal area, but due to rock conditions, test pits were excavated instead.
Area E: 2 test pits excavated contain boulders and angular granite, due to lack of soil no samples were taken, No debris, stained soil, petroleum odor, or other indications of contamination were detected.
Area F: 2 test pits was excavated, 1 in area were surface debris was observed (1994) A soil sample was collected and analyzed for GRO, DRO, RRO, metals, pesticides, PCBs, VOCs, and SVOCs. Arsenic was detected at 5.8 mg/kg, slightly above ADEC standards, but consistent with regional background levels. The 2nd pit contained mostly boulders of angular granite and gravel; therefore, no sample was collected. Surface debris observed included several 1 to 15 gallon containers and 35-gallon drums, steel cable, and metals associated with automotive parts or heavy machinery. 2 small drums contained residual oil, which were collected and analyzed, the sample exhibited elevated lead levels (1,950 mg/kg). A soil sample was collected from next to the containers and analyzed for GRO, DRO, RRO, PCBs, pesticides, SVOCs, and metals. This sample contained lead at 18.2 mg/kg below the ADEC cleanup level.
Area G: 2 test pits were excavated, 1 in the northwest corner of the site. One soil sample was collected and analyzed for GRO, DRO, RRO, metals, pesticides, PCBs, VOCs, and SVOCs. Arsenic (7.1mg/kg) and beryllium (4.9 mg/kg) were detected within site background concentrations. The 2nd pit was excavated along the southern edge. The test pit was comprised mainly of boulders and angular granite; therefore, no sample was collected. No fuel odor was detected at either test pit.
|
Anna Iverson |
| 6/6/2014 |
Update or Other Action |
2011 Decision Document-
Area E: No indications of fuel contaminants were observed during test pitting, therefore, the site requires no further action under state law and will be designated Cleanup Complete.
Area F: Soil sample results revealed DRO and RRO concentrations to be below the ADEC criteria (Lower Camp 250 mg/kg and 10,000 mg/kg, respectively). Because no fuel or hazardous substances were found at concentrations above applicable cleanup levels, the site requires no further action under state law and will be designated Cleanup Complete. However, surface debris was observed. Due to the observation of debris and the potential existence of subsurface solid waste, ICs will be put in place at Area F. Removal of solid waste at the site would cost an estimated $10 million and is not warranted. ICs will be put in place to document the location and boundaries of the disposal site and limit future activities that could expose buried wastes or cause the potential spread of contaminants, or placement of solid waste in environmentally sensitive areas.
Area G: No indications of fuel contaminants were observed during test pitting and soil sampling did not detect DRO or RRO above the ADEC criteria (250 mg/kg and 10,000 mg/kg, respectively). Therefore, the site requires no further action under state law and will be designated Cleanup Complete.
|
Anna Iverson |
| 6/12/2014 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79051 name: Granite Mountain AFS DA020. All pathways are incomplete or De Minimis. |
Anna Iverson |
| 7/22/2014 |
Cleanup Complete Determination Issued |
The Granite Mountain Decision Document applies institutional controls to this site, restricting excavation or movement of solid waste. ICs are documented in the 611th CES Land Use Control Management Plan.
The Decision Document was approved by DEC on January 10, 2011. |
Eric Breitenberger |
| 7/22/2014 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Eric Breitenberger |
| 5/18/2023 |
Document, Report, or Work plan Review - other |
DEC provided comments for the Draft Final Work Plan, Long Term Management at Granite Mountain Radio Relay Station, Alaska Dated May 2023. The Work Plan presents the approach and procedures for long-term management (LTM) at the Granite Mountain Radio Relay Station. The purpose of the LTM project is to conduct institutional control (IC) inspections, a landfill cover inspection at Site OT001, and sign maintenance, as needed, for the following sites to maintain compliance with U.S. Air Force (USAF) and regulatory requirements: DA020, DA021, DP009, DP010, LF002, OT001, SS016, SS017 and SS019. |
Dennis Shepard |
| 8/15/2023 |
Document, Report, or Work plan Review - other |
DEC provided approval for the Final Work Plan, Long Term Management at Granite Mountain Radio Relay Station, Alaska Dated June 2023. The work plan presents the approach and procedures for long-term management (LTM) at the Granite Mountain Radio Relay Station. The purpose of this LTM project is to conduct institutional control (IC) inspections, a landfill cover inspection at Site OT001, and sign maintenance, as needed, for the following sites to maintain compliance with U.S. Air Force (USAF) and regulatory requirements: DA020, DA021, DP009, DP010, LF002, OT001, SS016, SS017 and SS019. |
Dennis Shepard |
| 3/15/2024 |
Long Term Monitoring Workplan or Report Review |
DEC provided comments for the 2023 Long-Term Management Report Granite Mountain Radio Relay Station Sites DA020, DA021, DP009, LF002, OT001, SS016, SS017, and SS019 (dated February 2024). Visual inspections were conducted at the Lower Camp Area sites (DA021 and DP010) on July 5, 2023 and at Upper Camp Area sites (DA020, DP009, LF002, OT001, SS016, SS017, and SS019) on September 16, 2023. Landfill caps and other surface coverings were found to be in good condition. Institutional Control (IC) signage was inspected and signs were repaired and/or replaced as needed with the exception of site DA021 which was recommended for repairs at the next LTM inspection in 2028. |
Brian Watts |
| 3/19/2024 |
Institutional Control Update |
DNR-SAIL added as affiliate (Office of Primary Responsibility). |
Jennifer McGrath |
| 7/5/2024 |
Long Term Monitoring Workplan or Report Review |
DEC provided responses to comments for the 2023 Long-Term Management Report Granite Mountain Radio Relay Station Sites DA020, DA021, DP009, LF002, OT001, SS016, SS017, and SS019 (dated May 2024). The report describes long-term management activities completed July 5 and September 16, 2023. All comments were accepted, pending a final comment backcheck to the requested final report. |
Brian Watts |
| 8/20/2024 |
Long Term Monitoring Workplan or Report Review |
DEC provided approval for the Final 2023 Long-Term Management Report Granite Mountain Radio Relay Station Sites DA020, DA021, DP009, LF002, OT001, SS016, SS017, and SS019 (dated August 2024) to the U.S. Air Force. Activities consisted of a visual inspection, sign repair or replacement, and photo documentation of each site. The only institutional control/land-use control recommendation was to install an institutional control sign at DA021 during the long-term monitoring work planned for 2028. |
Erica Blake |
