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Site Report: Granite Mountain AFS SS017

Site Name: Granite Mountain AFS SS017
Address: ~30 Miles N of Koyuk, Koyuk, AK 99753
File Number: 610.38.001
Hazard ID: 25622
Status: Cleanup Complete - Institutional Controls
Staff: Erica Blake, 9074512182 erica.blake@alaska.gov
Latitude: 65.429668
Longitude: -161.236732
Horizontal Datum:WGS84

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 SS017 (also known as Disposal Area B; AOC02) is a former disposal and storage area west of the Upper Camp where drums of unknown origin and content have been stored. In 1985, the AF removed 200 drums from this site, excavated construction debris and trash, and covered and re-graded the area. This site is closed under state regulations. DRO remains in groundwater but because groundwater is not a viable source or drinking water or an anticipated transport mechanism, no further remedial action is required. Institutional controls will be applied to limit drilling in areas with petroleum-contaminated groundwater, require ADEC approval before removing or disposing of petroleum-contaminated groundwater and to document the site location and these restrictions in land use records. In accordance with the decision document, the ICs at Site SS017 will be reviewed every 5 years, to ensure that land use has not changed and ICs remain effective in limiting public access, due to the remaining presence of fuel contamination in groundwater.

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 visible soil stains or surface debris was found on site. A metal detection survey indicated no buried materials. Seep and soil samples were collected and ran for DRO, only one sample came back with a concentration of 12.0 mg/kg Anna Iverson
6/6/2014 Update or Other Action 1999-RI – 3 test pits were excavated and 3 monitoring wells installed. 2 soil and 1 surface water sample were collected and analyzed for GRO, DRO, RRO, metals, pesticides, PCBs, VOCs, and SVOCs. DRO was detected with a max concentration of 2,700 mg/kg (soil) and 10.4 mg/L (groundwater). Anna Iverson
6/6/2014 Update or Other Action 2001 RI – A surface seep water sample located downstream of the 3 monitoring wells had a DRO concentration of 0.3 mg/L, the reduced concentration indicated DRO may represent downgradient attenuation. Additionally, trace amount of DRO were detected in 2 surface seep soil samples. Anna Iverson
6/6/2014 Update or Other Action 2008 RI – Groundwater samples were collected from the 2 of the 3 monitoring wells, one well could not be sampled due to bentonite fouling. DRO analysis yielded concentrations of 9.22 and 18.2 mg/L, which is comparable to previous studies. Anna Iverson
6/6/2014 Update or Other Action 2011 Decision Document - ICs will be put in place at SS017 because DRO remains in groundwater. Since, groundwater is not a viable source of drinking water or an anticipated transport mechanism at SS017, the site requires no further action under state law and will be designated Cleanup Complete with ICs. Anna Iverson
6/12/2014 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79054 name: Granite Mountain AFS SS017. 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 access to groundwater. ICs are documented in the 611th CES Land Use Control Management Plan. The Decision Document was approved by DEC on January 10, 2011. ICs include: -Limiting excavation or drilling in areas containing petroleum-contaminated groundwater. -Characterizing and managing the groundwater by following the applicable regulations if petroleum-contaminated groundwater is used on or removed from the site. -Obtaining ADEC approval before removing or disposing of petroleum-contaminated groundwater at the site (pursuant to 18AAC75.325[i]) The ICs at Site SS017 will be reviewed every 5 years, to ensure that land use has not changed and ICs remain effective in limiting public access due to the remaining presence of fuel contamination in groundwater. Eric Breitenberger
7/22/2014 Institutional Control Record Established Institutional Controls established and entered into the database. Eric Breitenberger
11/6/2019 Document, Report, or Work plan Review - other ADEC approved the final "Second CERCLA Five-Year Review for Site OT001 and Second Non-CERCLA Periodic Review for Site SS017" The document concluded that institutional controls (ICs) were functioning as intended to meet Remedial Action Objectives (RAOs), and ground or surface water will be tested for lead prior to the termination of ICs at SS017. Tim Sharp
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

Contaminant Information

Name Level Description Media Comments
DRO > Table C Groundwater

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.
Groundwater Use Restrictions • Limiting excavation or drilling in areas containing petroleum-contaminated groundwater. • Characterizing and managing the groundwater by following the applicable regulations if petroleum-contaminated groundwater is used on or removed from the site.
Periodic Review In accordance with the decision document, the ICs at Site SS017 will be reviewed every 5 years, to ensure that land use has not changed and ICs remain effective in limiting public access, due to the remaining presence of fuel contamination in groundwater.

There are no documents for this site report.

No associated sites were found.

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby