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Site Report: AHFC Properties - Etolin Heights


Site Name: AHFC Properties - Etolin Heights
Address: 720 Cedar Circle , Post Office Box 950 (AHFC Etolin Heights Housing), Wrangell, AK 99929
File Number: 1529.38.005
Hazard ID: 1453
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 56.466093
Longitude: -132.373551
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

Leak discovered in fuel line coupling leading from diesel home heating tank. Twenty-five cubic yards soil was excavated and stockpiled for on-site remediation. In 1993 DEC approved a plan to have DOT land spread contaminated soil over on-site parking lot then paving with asphalt. In 1996, during replacement of ASTs at Buildings A and E with USTs, Smith Bayliss LeResche found contaminated soil. DEC and SW coordinated approval of an AHFC plan to remediate an estimated volume of 70 cubic yards of contaminated soil from the two sites for use as cover material at the City of Wrangell Landfill. The new USTs were successfully installed to supply fuel to Buildings A and E.

Action Information

Action Date Action Description DEC Staff
1/8/1992 Update or Other Action (Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Fuel oil leak lead to investigation and excavation of 1,500 gallon home heating tank. 25 yards of soil temporarily stockpiled on 20 mil liner. No Longer Assigned
1/10/1992 Update or Other Action (Old R:Base Action Code = MS - Monitoring/Sampling). Samples analyzed showed 650-723ppm hydrocarbon levels. No Longer Assigned
1/27/1993 Cleanup Plan Approved Remediation Plan submitted by RP representative Gonzales utilizes microbial enhanced bioremediation; Medina Cultured Microbes added to accelerate the rate of remediation. Coarse grained soil was to be treated on-site; when remediated the soil will be given to ADOT Wrangell and used for backfill in parking lot construction or landfill coverage. Plan approved by DEC; letter issued 1/29/93. Bruce Wanstall
2/11/1993 Update or Other Action (Old R:Base Action Code = MS - Monitoring/Sampling). Samples analyzed showed 138-847ppm hydrocarbon levels. No Longer Assigned
7/21/1993 Site Added to Database Cleanup underway. No Longer Assigned
5/22/1996 Site Ranked Using the AHRM Ranked by Shannon and Wilson. S&W
7/28/2003 Update or Other Action Project status update request to consultant for 1996 oil spill and land managing environmental engineer(AHFC) for 1993 biocell closure sampling results. Updated address, phone number and site file number. Bruce Wanstall
7/19/2004 Update or Other Action Site file review for Streamlined Cleanup Program inclusion; coordinate site visit to track fate of contaminated soil stockpiles totaling 70 cubic yards. Bruce Wanstall
7/20/2004 GIS Position Updated Property latitude-longitude record updated using Garmin calibrated to NAD 27. Bruce Wanstall
7/22/2004 Update or Other Action Site visit to building E. Maintenance staff were uncertain of the location of contaminated soil stockpile. Bruce Wanstall
2/15/2005 Update or Other Action Review file for additional data; City Engineer Caldwell has no data on soil stockpile from this property for the City Landfill. Request made to the responsible party for additional site information. Bruce Wanstall
8/10/2006 Potentially Responsible Party/State Interest Letter File review resulted in drafting a State Interest Letter requesting prompt new site investigation be conducted at AHFC expense; the alternative being to fill the data gaps by supplying reports that have been requested by the DEC from AHFC for several years. Bruce Wanstall
10/2/2006 Update or Other Action Contact with facilty manager for environmental affairs confirmed that a search of document archives is underway to locate a Final Report for site cleanup. Bruce Wanstall
2/9/2007 Update or Other Action Baseline ranking started for subsurface contamination at the former UST site at Building E at the residential housing facility. Bruce Wanstall
3/11/2008 Exposure Tracking Model Ranking Evaluate site status to include the heating oil UST source at the building A housing to finish the ETM initial ranking. Bruce Wanstall
3/23/2012 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 72431 USTs. Bruce Wanstall
11/13/2013 Site Visit DEC met on-site with Bernie Mason to observe historical petroleum spill and cleanup sites in the housing complex and discuss the final placement of contaminated soil from the bioremediation cell to the City of Wrangell landfill. There is no longer petroleum fuel stored at the facility, all housing units operate on electric power. Bruce Wanstall
5/5/2014 Update or Other Action Project manager updated lat/long coordinates on cinco de mayo 2014 using ArcGIS and personal knowledge where on the site petroleum release took place on the property. Bruce Wanstall
5/8/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 72431 USTs. Bruce Wanstall
5/19/2014 Institutional Control Record Established Institutional Controls established and entered into the database. Bruce Wanstall
5/19/2014 Cleanup Complete Determination Issued DEC has determined that remaining contamination was to de minimis extent and does not pose a risk to the occupants of the building, visitors at the site, or the quality of off-site surface water. Remaining concentrations in soil are isolated and impracticable to remove from their locations adjacent and beneath the building foundations and infiltration of surface water as a transport mechanism is restricted due to building and concrete features covering the area. Based on these factors, DEC has determined there is no unacceptable risk to human health or the environment as long as the contamination is properly managed in accordance with the Institutional Controls stipulated in the cleanup complete determination and agreement page signed by Alaska Housing Finance Corporation. This determination is in accordance with 18 AAC 75.380 and does not preclude DEC from requiring additional assessment and/or cleanup action if future information indicates that this site may pose an unacceptable risk to human health or the environment. Bruce Wanstall
10/9/2014 Institutional Control Compliance Review IC compliance review conducted and staff changed from Bruce Wanstall to IC Unit. Reminder system set to follow-up with the responsible party in 2019. Kristin Brown
6/15/2016 Institutional Control Compliance Review An IC compliance review was conducted. A letter requesting the signed ICs Agreement and Signature Page was issued to the responsible party on this date. Kristin Brown
6/20/2016 Institutional Control Update The signed ICs Agreement and Signature Page was received on this date. Kristin Brown

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil DRO concentration of 847 milligrams per kilogram (mg/kg) in a sample collected from soil remaining in the crawl space of Building D

Control Type

Type Details
Signed CS Determination The DEC Contaminated Sites Database will be updated to reflect the institutional controls stipulated in the closure determination agreement and description of the contamination remaining at the site. By signing the closure determination agreement, it is the responsibility of the owner/operator/land manager to maintain the terms of the Institutional Controls as stipulated in the signed agreement. Institutional controls may be removed in the future if documentation can be provided that shows cleanup levels have been met.

Requirements

Description Details
Excavation / Soil Movement Restrictions Sub-surface soil contamination is located at former fuel storage tank sites and in the utility corridors. When buildings area removed and/or the soil becomes accessible, the soil must be evaluated and contamination addressed in accordance with a DEC approved work plan.
Advance approval required to transport soil or groundwater off-site. Any proposal to transport soil or groundwater off-site requires DEC approval in accordance with 18 AAC 7.325(i).
New Construction Restrictions The AHFC Etolin Heights Housing Facility shall report to DEC every five (5) years to document land use is unchanged, or report as soon as the AHFC Etolin Heights Housing Facility becomes aware of any change in land ownership and/or use, if earlier, with a written description and photographs of the condition of ground surfaces overlying the contamination with notation of any changes since the last report.

Missing Location Data

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