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Site Report: Galena AFS/Airport - UST 1770 (CST013)

Site Name: Galena AFS/Airport - UST 1770 (CST013)
Address: South of the incinerator building (Bldg 1770)., Galena, AK 99741
File Number: 860.26.002
Hazard ID: 25168
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 64.741636
Longitude: -156.957853
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

Building 1770 had two 1,000 gallon tanks: 1770-1 (diesel) and 1770-2 (waste oil). The tanks were active until 1993, and were probably removed in 1997, but the exact date is uncertain. DRO was detected in the excavation up to 42,800 mg/kg, GRO up to 760 mg/kg, and BTEX up to 33.9 mg/kg. Approximately 107 cubic yards of contaminated soils were excavated and placed in the Tank 37 biocell. The tank excavation was probably backfilled with clean fill. --Updated 2011-- This site was included in the Preliminary Assessment report in April 2010, it was recommended for additional site characterization. The intent of investigation in this area was to characterize the nature and extent of contamination in soil laterally and vertically, and to investigate the amount of contribution of this site to the underlying groundwater plume. First round of samples came back petroleum contaminated. Two sets of samples to the south and east of the sites were approved to aid in delineation. In 2011, the first set of step out samples bounded contamination at this site. During 2011 Triad meeting number #1 it was agreed that no additional step out samples were warranted at this site. --Update 2016-- During the spring and summer of 2010 and 2011 a Site Characterization (SC) investigation was conducted for the site. In November 2014, DEC approved a Site Characterization report addendum that proposed excavating an estimated 500 cubic yards of petroleum contaminated soil. A cleanup plan for Site CST013 was received in June 2015. The cleanup plan proposed excavation of petroleum contaminated soil greater than Method Two soil cleanup levels and treating the soil at the Galena landfarm. The cleanup plan was approved in August 2015. Approximately 340 loose cubic yards of petroleum contaminated soil was excavated and transported to the Galena landfarm for treatment between August 25 and August 30, 2015. Site cleanup and restoration was completed by September 3, 2015.

Action Information

Action Date Action Description DEC Staff
12/15/2005 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77553 Unknown documentation summarized by the Air Force mentions BTEX, GRO, and DRO contamination in the soil above Method 2 cleanup levels. Currently negotiating with AF Compliance about past UST removals to see which sites merit further investigation. Colin Craven
12/15/2005 Site Added to Database Former Staff
12/15/2005 Leaking Underground Storage Tank Cleanup Initiated - Petroleum 10/23/06 Update action history Evonne Reese
12/31/2005 Update or Other Action RECKEY has automatically been generated. Former Staff
8/12/2010 Site Characterization Workplan Approved SC workplan approved Fred Vreeman
8/12/2010 Conceptual Site Model Submitted CSM submitted Fred Vreeman
9/1/2010 Site Visit Site visited Amanda Loomis
2/15/2011 Meeting or Teleconference Held TPT meeting, site discussed Fred Vreeman
4/28/2011 Update or Other Action Stepout Memo approved Fred Vreeman
6/9/2011 Site Visit Site visited Fred Vreeman
6/21/2011 Meeting or Teleconference Held TRIAD meeting, site discussed Fred Vreeman
7/11/2011 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 77553 name: autogenerated pm edit - Galena Airport - UST 1770 Amanda Loomis
1/6/2012 Update or Other Action DEC received a Draft Site Characterization Report for UST 1770. Dennis Shepard
2/18/2012 Document, Report, or Work plan Review - other DEC sent review comments on the Draft Site Characterization report for UST 1770. Dennis Shepard
2/15/2013 Document, Report, or Work plan Review - other ADEC received a Draft Final version of the Site Characterization Report for UST1770. Dennis Shepard
3/13/2013 Document, Report, or Work plan Review - other ADEC provided review comments for the Draft Final Site Characterization results report. Dennis Shepard
3/21/2013 Meeting or Teleconference Held A risk scoping meeting was held March 20-21, 2013 in Austin, Texas. The site was disscussed including: review of data gaps, sufficiency of data and the usability of the data for inclusion into the cumulative risk assessment. Dennis Shepard
4/24/2013 Document, Report, or Work plan Review - other Sent revised comments for Draft Final Site Characterization results report. The revisions were based in part on the agreements reached between the Air Force and the Department during a Risk Assessment Scoping meeting held in Austin, Texas on March 20-21, 2013. Dennis Shepard
6/10/2013 Site Characterization Report Approved DEC approved the Site Characterization (SC) Results Report, Site UST1770 Former Galena Forward Operating Location (FOL), Galena, Alaska. Dennis Shepard
11/4/2014 Site Characterization Report Approved DEC approved the Addendum Site Characterization (SC) Results Report, Building 1770 Former Incinerator Underground Storage Tanks (USTs) [Site UST1770, renamed CST013], Former Galena Forward Operating Location (FOL), Alaska. The purpose of the addendum was to address requirements for an SC Report under 18 AAC 75.335 (c) (DEC, 2012), specifically, to propose cleanup levels and remedial techniques for the site. Monte Garroutte
8/17/2015 Cleanup Plan Approved DEC approved the Cleanup plan for site UST 1770. The proposed cleanup approach is excavation of petroleum-contaminated soil greater than Method Two CULs (or ACLs developed under Method Three) to a depth of 15 ft bgs, and treatment of the petroleum-contaminated soil at the Galena Landfarm, located near Campion, Alaska. Dennis Shepard
9/13/2016 Update or Other Action DEC received a Draft Cleanup closure report/request for cleanup complete determination. Dennis Shepard
11/22/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77553 autogenerated pm edit - Galena Airport - UST 1770. Dennis Shepard
12/6/2016 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with the Site Galena AFS/Airport - UST 1770 (CST013) located within the City of Galena, Galena, Alaska. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required unless new information becomes available that indicates residual contaminants may pose an unacceptable risk. This Cleanup Complete determination is based on the administrative record for the CST013, which is located in the ADEC office in Fairbanks, Alaska. Dennis Shepard

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil De-Minimis DRO and GRO contaminated soil volume remains. DRO 2,500 mg/kg remains.
GRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil De-Minimis DRO and GRO contaminated soil volume remains. GRO 320 mg/kg remains.

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
TDD: 800-770-8973
Physical Location: 410 Willoughby