Site Report: Granite Mountain AFS SS003
| Site Name: | Granite Mountain AFS SS003 |
|---|---|
| Address: | ~30 Miles North of Koyuk, L.C. Spill/Leak No. 1 east side of runway, Koyuk, AK 99753 |
| File Number: | 610.38.001 |
| Hazard ID: | 821 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 65.401600 |
| Longitude: | -161.280600 |
| Horizontal Datum: | NAD83 |
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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
Former Lower Camp disposal and storage area adjacent to middle of runway (Disposal Area C); drum staging/disposal (up to 500 drums were stored in the past and were removed in 1985). Formerly AOC03. Also see file 610.15.002 and archived file 610.23.001. EPA ID #AK5570028659. 1994 investigations included field screening for DRO and PCBs, and sampling form soil, water, and sediment for VOCs, SVOCs, metals and mercury, GRO, and DRO. A sample from visually heavy staining was also analyzed for RRO and PCBs. In 1999, 3 soil borings and 9 shallow subsurface soil samples were taken along with two water and sediment samples from puddles; all except sediment samples were analyzed for GRO, DRO, RRO, metals, pesticides, PCBs, VOCs and SVOCs (sediment samples not tested for SVOCs). Two soil samples were additonally sampled for dioxins and TOC. In 2008, the RI used field screening and analytical step-outs to delineate DRO and RRO impacted soils. The PCB affected area was further delineated with sediment and soil samples. During the 2009 remedial action, 10 cubic yards of PCB contaminated soil >1 mg/k and <10 mg/kg, were removed from the SS003 site and placed in the PCB cell in the onsite landfill. Confirmation samples ranged from ND to 0.587 mg/kg. A total of 500 cubic yards of petroleum contaminated soil was excavated and landspread at upper camp. The depth of excavation was limited by the presence of bedrock. When confirmation samples from the excavated soil verified that the concentrations were below the health based cleanup levels, the soil was used as cover in the construction and debris landfill located at upper camp. This site is closed under CERCLA and state regulations. No further remedial action is required and no institutional controls are necessary.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 12/26/2001 | Site Added to Database | RRO. | Former Staff |
| 12/26/2001 | Site Ranked Using the AHRM | Initial ranking. | Former Staff |
| 12/26/2001 | Update or Other Action | 1999 RI Activities - Samples: 2 soil borings installed to maximum depth of 8.5 feet. 3 subsurface soil samples collected. 1 monitoring well installed and sampled. 2 surface water/sediment locations sampled. 9 surface and shallow subsurface soil samples collected for analysis by the CSL (6 at large stained area, and 1 at each of two smaller stained areas). Analyses: Fixed lab: GRO, DRO, RRO, SVOCs, pesticides, PCBs, metals. CSL: DRO and RRO. Significant RI Findings - RRO concentrations (up to 44,900 mg/kg) in stained soils exceeded ADEC cleanup standards. | Former Staff |
| 2/26/2002 | Update or Other Action | Staff commented on Granite Mountain RRS, Draft Decision Documents. Action entered by Sarah Riddle. | Patrice Buck |
| 12/16/2005 | GIS Position Updated | Updated the site location data. | Colin Craven |
| 1/10/2006 | Meeting or Teleconference Held | DEC meeting with Air Force project manager. See the sitewide "Granite Mountain AFS" database entry for details. | Colin Craven |
| 2/23/2007 | Exposure Tracking Model Ranking | Initial | Lisa Maserjian |
| 12/30/2008 | Document, Report, or Work plan Review - other | The site contains 4 surface stains from previous drum storage. Predominantly DRO and RRO, but samples of Area 4 detected two areas with PCBs slightly exceeding the 1 mg/kg cleanup level. One sediment sample collected in 1999 detected 9.2 mg/kg PCBs. | Kim DeRuyter |
| 5/12/2009 | Document, Report, or Work plan Review - other | The final Engineering Evaluation and Cost analysis (EECA) was reviewed and approved. The EECA describes excavation and disposal of PCB contaminated soil with concentrations between 1 and 10 mg/kg at three sites SS003, OT01, and AOC15. The soil will be placed in an permitted onsite landfill. | Kim DeRuyter |
| 1/22/2010 | Document, Report, or Work plan Review - other | Draft Remedial Action Report received, site closure is reccommended for all areas of concern. | Kim DeRuyter |
| 3/3/2010 | Exposure Tracking Model Ranking | A new updated ranking has been completed for source area 71800 SS003. The Problem Statement and ETM were updated with the the current site informtation from the 2009 remedial action. All pathways ranked as either incomplete or deminimis exposure. Over 500 cubic yards of soil was excavated from the SS003 and either landspread or shipped offsite. Soil contaminated with PCBs below 10 mg/Kg was placed in a PCB cell in the Construction and Debris landfill. Confirmation sample results were below the migration to groundwater cleanup level. | Kim DeRuyter |
| 1/19/2011 | Update or Other Action | The CERCLA ROD and Petroleum DD were submitted to the department. Staff provided comments on several versions of the documents. Initially, petroleum contamination at sites with CERCLA contaminants were covered in the ROD. The structure of the CERCLA ROD did not allow for adequate coverage of the petroleum at these sites. Since the petroleum and CERCLA contaminants were not co-located it was decided that the petroleum cleanups at the CERCLA contaminated sites could be covered in the Petroleum Decision Document. Staff provided comments on the draft and draft final versions of these restructured documents. The ROD and Decision Document are currently being prepared for signature. | Kim DeRuyter |
| 2/10/2011 | CERCLA ROD Approved | The selected remedy for this site is No Further Action. | Kim DeRuyter |
| 2/10/2011 | Cleanup Complete Determination Issued | Kim DeRuyter |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| RRO | < Method 2 Most Stringent | Soil |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.