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Site Report: Galena AFS/Airport - Bldg 1400 & 1401 USTs (UST 1400 / CST009)

Site Name: Galena AFS/Airport - Bldg 1400 & 1401 USTs (UST 1400 / CST009)
Address: NE Runway Area, Galena, AK 99741
File Number: 860.38.015
Hazard ID: 1953
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 64.738800
Longitude: -156.931900
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

On August 30, 1993 ADEC was informed that soil contamination was found during the removal of two heating oil tanks in the northeast area of the runway, which were used for former Buildings 1400 and 1401. Diesel range organics were detected in the excavation during tank removal above Method 2 cleanup levels. Five monitoring wells were installed and sampled. No contamination was detected above cleanup levels, but the water samples were only sampled for DRO. An abandoned drinking water well was located due east of Building 1401. The record stated that new tanks were installed in same location in 1996, and workers complained of vapors during installation of secondary containment. However, this may be testimony in regards to another location, as Buildings 1400 and 1401 were demolished in 1993. **Updated 2011** UST1400- This site has been identified as a candidate for both the site inspection phase as well as the site characterization phase. Sample results from the tank removal in 1993 indicated that diesel range organics and gasoline range organics were detected above Method 2 cleanup levels in soil, and potentially in down gradient groundwater. In August 2010, a field sampling plan for site inspection and site characterization was developed. The areas of concern being investigated at this site are UST1400, the septic drain field associated with B1400, and two radiator heating tanks associated with B1400. UST1400 will be investigated under the site characterization phase. The goal of the site characterization part of the investigation is to characterize nature and extent of contamination vertically and laterally. The septic leach field and radiator heating tanks will be investigated under the site investigation phase. The goal of the site inspection pat of the investigation is to determine presence or absence of contamination. Target analytes being investigated at this site are: UST1400-GRO, DRO, BTEX, and PAH. Septic drain field- VOCs and RCRA metals. Radiator heating tanks- glycol, VOCs, and RCRA metals. This site was also analyzed for target analytes from sites within a 500 ft radius. Pesticides were not included in this target analyte list because they were not a function associated with historical site use. The 2010 field investigation was implemented in accordance with the field sampling plan. The nature and extent of soil contamination at the former UST was delineated, and there was no evidence of a release from the radiator tanks or septic drainfield. A Site Investigation to No Further Action/Non-qualifying site designation recommendation for the septic drainfield and radiator tanks will be submitted to ADEC by the USAF. A Site Characterization report and evaluation of the need for remedial action at the former UST will be prepared by the USAF for submission to ADEC UST1401- This site has been identified as a candidate for both the site inspection phase as well as the site characterization phase. Historical samples collected at this site were not analyzed with DEC approved methods In August 2010, a field sampling plan for site inspection and site characterization was developed. The areas of concern being investigated at this site are UST 1401 and the septic drain field associated with B1401. UST 1401 will be investigated under the site characterization phase. The goal of the site characterization part of the investigation is to characterize nature and extent of contamination vertically and laterally. The septic leach field will be investigated under the site investigation phase. The goal of the site inspection pat of the investigation is to determine presence or absence of contamination. Target analytes being investigated at this site are: UST1401-GRO, DRO, BTEX, and PAH. Septic drain field- VOCs and RCRA metals. This site was also analyzed for target analytes from sites within a 500 ft radius. Pesticides were not included in this target analyte list because they were not a function associated with historical site use. The 2010 field investigation was implemented in accordance with the field sampling plan. The nature and extent of soil contamination at the former UST was delineated, and there was no evidence of a release from the septic drainfield. A Site Investigation to No Further Action/Non-qualifying site designation recommendation for the septic drainfield will be submitted to ADEC by the USAF. A Site Characterization report and evaluation of the need for remedial action at the former UST will be prepared by the USAF for submission to ADEC.

Action Information

Action Date Action Description DEC Staff
8/23/1993 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). Received site investigation describing the removal of two USTs by 11th CEOS/CEOR. DRO soil and groundwater contamination found. Contamination needs to be further defined and groundwater sampled for BTEX. Laura Noland
3/17/1994 Site Added to Database File# 860.38.015 Former Staff
3/21/1994 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). Received and reviewed report entitled "Underground Storage Tank (UST) Removals at Buildings 1400 and 1401 Galena Aprt" which describes the removal and site assessment at the site of two unregulated 1,700 gallon heating oil tanks. ADEC finds that additional site characterization is required and groundwater will need to be sampled for VOCs. Laura Noland
5/26/1994 Site Ranked Using the AHRM Initial ranking. Former Staff
5/27/1994 Update or Other Action (Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. Jeff Peterson
2/21/2003 Update or Other Action A new project manager has been assigned to this site. The area will be researched in 2003 to determine the remaining contaminant issues. Ann Farris
10/21/2004 Meeting or Teleconference Held Galena RAB meeting. See the "Galena AFS - Sitewide" listing for more details. Colin Craven
1/28/2005 Meeting or Teleconference Held Galena RAB meeting. See the "Galena AFS - Sitewide" listing for more details. Colin Craven
4/26/2005 Meeting or Teleconference Held Galena RAB meeting. See the "Galena AFS - Sitewide" listing for more details. Colin Craven
10/12/2005 Meeting or Teleconference Held Galena RAB meeting. See the "Galena AFS - Sitewide" listing for more details. Colin Craven
11/1/2005 GIS Position Updated Updated the site location and problem statement. Colin Craven
1/26/2006 Update or Other Action This site has been historical handled under the Air Force’s Compliance program, but the current Air Force IRP program manager will address the site when Base Realignment and Closure (BRAC) funds become available. Colin Craven
9/1/2010 Site Visit Site visited at Galena -- field work audit Amanda Loomis
9/2/2010 Document, Report, or Work plan Review - other Field sampling plans for sites UST1400 and UST1401 reviewed. SC workplan for the USTs and SI workplans for the associated septic drain fields and radiator tanks. Fred Vreeman
9/30/2010 Site Characterization Workplan Approved Field sampling plans for sites UST1400 and UST1401 approved. SC workplan for the USTs and SI workplans for the associated septic drain fields and radiator tanks. Fred Vreeman
9/30/2010 Conceptual Site Model Submitted CSM submitted Fred Vreeman
2/16/2011 Meeting or Teleconference Held Anchorage TPT meeting Feb 16-17, 2011 Fred Vreeman
6/9/2011 Site Visit Site visit to Galena -- field work audit Fred Vreeman
7/7/2011 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 72931 name: auto-generated pm edit Galena AFS - Bldg. 1400 & 1401 USTs Amanda Loomis
7/7/2011 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 72931 auto-generated pm edit Galena AFS - Bldg. 1400 & 1401 USTs. Amanda Loomis
1/10/2012 Document, Report, or Work plan Review - other DEC received the Draft Site Characterization Reports for Sites UST1400 and UST1401. Dennis Shepard
2/18/2012 Document, Report, or Work plan Review - other ADEC provided comments on the Draft Site Characterization Report. Dennis Shepard
11/28/2012 Meeting or Teleconference Held A meeting was held to discuss remaining data gaps in Site Characterization for the sites. Dennis Shepard
1/28/2013 Meeting or Teleconference Held A Teleconferene was held to discuss AS-Built drawings found by the Air Force during MMRP records review. Additional sampling was proposed in locations that coorespond to the As-built drawings. The new borings will be completed in FY 13. Dennis Shepard
7/1/2014 Site Characterization Report Approved DEC approved the Site Characterization report for Site UST 1401. The report concludes that contamination is not present above Method two, cleanup levels. The report also recommends a cleanup complete determination be made for the site. Dennis Shepard
9/4/2014 Document, Report, or Work plan Review - other DEC approved a Site Characterization Addendum for Site UST 1400. The purpose of the addendum is to address requirements for an SC Report under 18 AAC 75.335 (c) (ADEC, 2012), specifically, to propose cleanup levels and remedial techniques for the site. The proposed cleanup approach is to excavate contaminated soil from the former underground storage tank (UST) source area that is greater than the DEC method two, table B CULs and treat the soil at the Galena Landfarm. Dennis Shepard
9/25/2014 Update or Other Action At Site UST 1401, remaining contamination in soil and groundwater is below approved cleanup levels or has been deemed “De-Minimis” by DEC. DEC provided a Cleanup Complete determination for the site UST 1401 to the Air Force and it is closed without ICs. Site UST 1400 site characterization confirmed a small volume (~10 cubic yards)soil contamination but no groundwater impacts. UST 1400 is being addressed/remediated in 2015 by a soil removal action. After the removal action and confirmation sampling demonstrate no remaining soil contamination at UST 1400, this Site (Galena AFS/Airport - Bldg 1400 & 1401 USTs) will be closed on the Database. Dennis Shepard
9/25/2014 Site Characterization Report Approved DEC approved the Final Site Characterization (SC) Results Report for Building 1400 Former Ammunition Storage UST (Site UST1400 or CST009), Former Galena Forward Operating Location, Alaska. Dennis Shepard
9/24/2015 Final Cleanup Report Reviewed DEC approved the ADEC Method Three Risk Evaluation for Site CST009 (UST1400), Former Galena FOL. Based on the HRC evaluation, carcinogenic and noncarcinogenic risk is below the DEC risk criteria (Carcinogenic risk < 1 X 10-5, noncarcinogenic Hazard Quotient <1). Based on site characterization sample results, remaining DRO contaminated soil above Method Two, Table B cleanup levels is estimated at 3 cubic yards. Groundwater DRO concentrations are less than the DEC Method Two, Table C cleanup level. Dennis Shepard
9/25/2015 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 72931 auto-generated pm edit Galena AFS - Bldg. 1400 & 1401 USTs. Dennis Shepard
9/28/2015 Cleanup Complete Determination Issued Site UST1400 area is no longer a concern and is considered “Closed”, without Institutional Controls. A de minimis volume of petroleum contaminated soil was left in place approximately 10 feet below ground surface with concentrations above the migration to groundwater cleanup levels but below direct contact, ingestion and inhalation cleanup levels. However, groundwater samples indicate that all analytes in groundwater are below Table C cleanup levels. Migration to groundwater is not a concern at this site. All remaining contamination in soil and groundwater is either below approved cleanup levels or has been deemed “De-Minimis” by DEC. Dennis Shepard
4/21/2021 Document, Report, or Work plan Review - other REPORT APPROVAL: 2020 Performance Monitoring Report for Sites CPL006, CSS002, SS006/SS019, SS017, SS015, SS016, SS018, SS022, ST009, ST010, and FT001, Former Galena Forward Operating Location, Alaska (Parsons, April 2021) Jamie McKellar

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Groundwater samples indicate that all analytes in groundwater are below Table C cleanup levels. Migration to groundwater is not a concern at this site.

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

No associated sites were found.

Missing Location Data

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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
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