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Site Report: NPS Yukon-Charley Eagle Airport Ramp

Site Name: NPS Yukon-Charley Eagle Airport Ramp
Address: Eagle Airport; , Eagle, AK 99738
File Number: 200.26.005
Hazard ID: 23348
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 64.777285
Longitude: -141.155329
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

The landowner of this site is DOT/PF; the responsible party is the NPS. Groundwater at this site is 26-50 feet bgs, and permafrost is present but was not encountered during excavations 12 feet bgs. A well exists 150 ft west of the former USTs, but it produces non-potable water. Drinking water is hauled from Eagle City water supply. 3190 Tract 1, Lot 1.(rpltr9) Site located @ Eagle Airpt which is 1.7 miles east of Eagle. In 1992, three USTs were removed. During the removal, soil samples were analyzed for DRO only. This was deemed inadequate, so the 1996 Site Assessment characterized the former UST area and the former dispenser island. The USTs were well below cleanup levels for all petroleum type contamination. The dispenser island soils exceeded Level B cleanup levels for DRO, GRO, and total BETX. An estimated 10 to 25 cubic yards of contaminated soil remains in place near and underneath a hangar building which was constructed in 1993. Hydrocarbon odor was noted during the excavation of the slab-on-grade hangar foundation. The lateral spread of contamination from the dispenser is expected to be minimal because no significant levels of hydrocarbons were detected at the side wall of the former UST excavation, which was 4 feet north of the former dispenser.

Action Information

Action Date Action Description DEC Staff
5/3/1993 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 76185 ADD; Hung: NPS Airport Ramp - Eagle, file# 200.26.005. Former Staff
5/3/1993 Site Added to Database Former Staff
6/6/1994 Update or Other Action CORR; Wingerter sent letter informing RP of their financial liability under new ADEC cost recovery policy. State is authorized, under Section 9003(h) of the Resource Conservation and Recovery Act to take action on this LUST facility. Former Staff
6/20/1994 Update or Other Action RPL2; Peterson sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. Former Staff
6/25/1996 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LCAU; The following USTs were removed 6/28/93: (1) 2,000-gallon 100LL aviation gasoline, (1) 2,000-gallon unleaded gasoline, (1) 3,000-gallon jet A fuel. Soils in each of the excavation pits were not contaminated above ADEC cleanup levels. Former Staff
9/23/1996 Update or Other Action DEC grants & issues waiver request for AK101 GRO to RPCON Former Staff
9/26/1996 Underground Storage Tank Site Characterization or Assessment 2nd SA conducted by different RPCON because '93 SA only analyzed soil for DRPH & omitted dispenser area. Former Staff
3/18/1998 Update or Other Action SA rept received by DEC on 2nd SA Former Staff
9/7/1999 Update or Other Action DEC reviews 2nd Site Assessment report. Two cu yds heavily contam soil w/DRO & GRO removed from the former dispenser area is contained w/in 2 layers of 6 mil polyethylene sheeting top and bottom in the former dispensing pit & covered with clean soil. Former Staff
9/9/1999 Update or Other Action Ph call to RP (Bill Heubner) re-status of 2 cu yds contam soil Former Staff
9/14/1999 Update or Other Action Ph call fr RP stating will put in request for funds to sample and/or remediate 2 cu yds heavily contam soil next summer. Former Staff
9/23/1999 Update or Other Action Ltr to RP fr DEC re-review of 2nd SA rept. Request that RP proceed with cleanup and provide justification for leaving remaining contam in place w/some details on foundation and floor of hangar in order to help evaluate the need for further cleanup or no further remediation action decision. Former Staff
10/25/1999 Update or Other Action Phone call from RP re-DEC 9/23/99 ltr, how to request budget for cleanup & request closure of site as no receptors. DEC: read last paragraph of ltr, send info & will consider. Former Staff
10/28/1999 Update or Other Action DEC receives ltr & drawings of hangar foundation from RP. Ltr. Requests closure of site w/out remediation of contam soils stockpiled and under foundation hangar. Former Staff
11/17/1999 Update or Other Action Review of RP ltr and hangar drawings with Paul Pinard. Appears foundation of hanger can stand some sort of shallow passive SVE system. Former Staff
11/17/1999 Update or Other Action Phone call to RP re- reviews of ltr and hangar drawings indicate possibility of some sort of passive SVE for remediation at the hangar foundation. Contam soils must be remediated. Closure or NFA of site denied. Former Staff
11/18/1999 Update or Other Action Phone call from RP requests ltr for budgetary purposes, due 11/24/99. Wants to know if can extend SVE piping to encapsulated stockpile. Plan on using field staff to install SVE with minimal use of RPCON due to budgetary constraints & use solar powered rather than wind driven turbine. DEC: check with RPCON on effective design & make sure confirmation sampling is done on hangar foundation & stockpile after remediation is done. Former Staff
11/19/1999 Update or Other Action DEC ltr to RP briefly citing phone discussions held 11/17-18/99. RP to submit work plan for in-place remediation prior to project work in summer 2000 for approval. Former Staff
1/28/2004 Update or Other Action Transferred DEC staff lead from John Carnahan Cynthia Pring-Ham
1/25/2010 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 76185 name: NPS Airport Ramp also known as Yukon-Charley Rivers National Preserve Melody Debenham
8/10/2010 Update or Other Action Staff issued a letter to the National Park Service regarding the need for additional site characterization. James Ward
8/14/2012 Site Characterization Workplan Approved Approved the site characterization final work plan. To delineate the lateral and vertical extent of remaining contamination, the NPS is proposing to install up to 8 soil borings and collect soil samples for DRO, GRO, BTEX, EDB, EDC, PAHs, and lead. If perched water is encountered, a temporary well will be installed and a groundwater sample will be collected. Up to 10 cubic yards of contaminated soil will be removed as possible, without compromising the integrity of the hangar foundation. Melody Debenham
12/26/2012 Site Characterization Report Approved Approved the final 2012 site characterization and remediation report. Approximately 8 cubic yards of petroleum contaminated soil was excavated from the site and containerized for disposal. Confirmation sampling indicates that all contaminated soil above the cleanup level was removed. A temporary well point was installed, however no water collected in the well, so no groundwater sample could be collected. Melody Debenham
12/26/2012 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 76185 NPS Airport Ramp also known as Yukon-Charley Rivers National Preserve. Melody Debenham
4/2/2013 Cleanup Complete Determination Issued Melody Debenham
5/31/2013 Document, Report, or Work plan Review - other Approved plan to thin-spread 8 cubic yards of petroleum contaminated soil generated during 2012 removal actions off-site on a lot owned by the National Park Service. Melody Debenham
9/30/2014 Potentially Responsible Party/State Interest Letter Potentially responsible party letter sent to the National Park Service. Melody Debenham
11/24/2015 Update or Other Action Received photographs documenting re-vegetation at site where contaminated soil was thin-spread. Melody Debenham

Contaminant Information

Name Level Description Media Comments
GRO < Method 2 Most Stringent Soil
DRO < 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.

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