Site Report: Granite Mountain AFS DA021
| Site Name: | Granite Mountain AFS DA021 |
|---|---|
| Address: | ~30 Miles N of Koyuk, Koyuk, AK 99753 |
| File Number: | 610.38.001 |
| Hazard ID: | 25620 |
| Status: | Cleanup Complete - Institutional Controls |
| Staff: | Brian Watts, 9072694702 brian.watts@alaska.gov |
| Latitude: | 65.404568 |
| Longitude: | -161.284763 |
| Horizontal Datum: | WGS84 |
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We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.
Problems/Comments
Site DA021 (also known as Disposal Area K; AOC18) is a potential dump area located near the northwestern portion of the runway at the Lower Camp. The site is traversed by a road that divides it into two regions of disturbed soil. No fuel or hazardous substances were found at concentrations above applicable cleanup levels, Site DA021 requires no further action under state law and will be designated Cleanup Complete. However, the presence of solid waste has been documented at this site. Removal of solid waste at the site would cost an estimated $15 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.
Action Information
| 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 surface staining was visible, therefore, not soil samples were collected. However, a run-off water samples and associated soil sample were collected from an area of standing water. The soil sample exhibited a DRO concentration of 27.2 mg/kg. | Anna Iverson |
| 6/6/2014 | Update or Other Action | 1999 RI – 2 test pits were excavated and 1 surface soil location was sampled to investigate potential sources of contamination. 1 soil samples was collected in the first test pit (located near run-off water and soil sample collected in 94). The 2nd pit was located near the roadway, with 1 soil sample being collected. No odor or staining was present in either test pit. A soil sample was also collected 70 feet northwest of TP02 and analyzed for GRO, DRO, RRO, metals, pesticides, PCBs, and SVOCs. Arsenic was detected at 22 mg/kg and 19.8 mg/kg in soil samples. The pesticide 4, 4’-DDT was detected at 0.0082 mg/kg. Both concentrations were below regulatory limits; the arsenic concentration was within regional background concentrations. | Anna Iverson |
| 6/6/2014 | Update or Other Action | 2011 Decision Document- No fuel or hazardous substances were found at concentrations above applicable cleanup levels, Site DA021 requires no further action under state law and will be designated Cleanup Complete. However, the presence of solid waste has been documented at this site. Removal of solid waste at the site would cost an estimated $15 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. | Anna Iverson |
| 6/12/2014 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79052 name: Granite Mountain AFS DA021. 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 |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | < Method 2 Most Stringent | Soil |
Control Type
| Type | Details |
|---|---|
| Institutional Control Management Plan | Included in 611th CES LUC Management Plan. |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. | |
| Excavation / Soil Movement Restrictions | Restrictions on excavation or disturbance of buried solid waste to prevent the release of potential contamination or placement of solid waste in environmentally sensitive areas. Restrictions on movement of buried solid waste without prior ADEC approval. |
There are no documents for this site report.
No associated sites were found.