AFS/Airport - SS005 Wilderness Hall

Contaminants
 

Chemicals, Diesel, Gas, Lead, Petroleum Product

Size

Unknown

DEC Database

Location
 

Unknown

Problem Severity

Unknown

Current Use

Unknown

Redevelopment Plan

Unknown

Past Work on Site

Building 1872, now Wilderness Hall was constructed in 1979 as an airman dormitory. Since the late 1990s, however, it has been used as a boarding school dormitory. Petroleum contamination was encountered in the soil and groundwater at the southwest corner of the building. The source is unknown. Air Force Installation Restoration Program Site SS005. Until recently, the elevated contaminant levels around the Wilderness Hall building were grouped into the North POL Tank Farm plume. In 2002, the USAF decided that a new site should be formed around Wilderness Hall, and IRP Site SS005 was created. --Updated 2011-- April 2010 In April 2010 a Work Plan for Site Inspection, Remedial Investigation, and Site Characterization Former Galena Forward Operating Location, Alaska was developed. B1872, Wilderness Hall, was identified as a candidate for the site characterization pathway. The goal of the site characterization pathway is to characterize nature and extent of contamination both laterally and vertically. Target analytes being investigated are: GRO, RRO, DRO, BTEX, VOCs, 1, 2 DCE, EDB, PAHs, lead, and pesticides. This site was also analyzed for possible analytes from within a 500ft radius of the site boundary. From this analysis, pesticides were added to the target analyte list. Initial sampling at this site is expected to be completed during the 2010 field season. ---------------------------- August 2010 Results from the First Triad meeting: Data from the on-site lab was available at for this site. Analytes that that the on-site lab can analyze for include: GRO, DRO, RRO, and BTEX. The on-site lab can also perform PCE and TCE screenings. The other target analytes for this site are sent to an off-site lab and the results were not available for discussion. This site will be re-visited once all data is available. Lab results: SS005-GP004; 2,090J mg/kg GRO [10.0ft bgs] – BTEX [0,5,10ft] SS005_GP002; DRO 310.2 mg/kg [10.0ft bgs] – GRO 15,200 mg/kg [10.0ft bgs] – BTEX [10 and 22 ft bgs] SS005_GP009; DRO 1,999 mg/kg [5.0ft bgs] – GRO 1,490 mg/kg [5.0ft bgs] – BTEX [5ft bgs] SS05_GP007; DRO 668.2 mg/kg [0.0ft bgs] SS005_GP001, GP008 –BTEX [10 and 12ft bgs] Five additional borings have been approved Results from the Fourth Triad meeting: Data from the on-site lab was available at for this site. Analytes that that the on-site lab can analyze for include: GRO, DRO, RRO, and BTEX. The on-site lab can also perform PCE and TCE screenings. The other target analytes for this site are sent to an off-site lab and the results were not available for discussion. This site will be re-visited once all data is available. On-site lab results from the first set of step out locations: Step out locations on the western side of the site SS005_GP015 and GP014 showed BTEX below screening levels (SL). Western step out samples SS005_GP009 and GP012 showed Benzene slightly above SL at .03 and .06 mg/kg at 40 ft bgs. The final step out SS05_GP011 showed GRO at 1890 mg/kg at 32 ft bgs, and BTEX exceedances at 32 ft bgs. Concurrence reached on 8/26/2010 that no further stepout sampling is necessary. During the April 2011 TPT meeting SS005 was added to the Interim Removal Action Work Plan. The goal of the IRA is to remove soil above cleanup levels to achieve complete closure. This work is scheduled to begin in August 2011. Between July and November 2011, approximatly 2,500 cubic yards of Petroleum contaminated soil was excavated and removed from Site SS005. The Petroleum contaminated soil was transported and stockpiled at the Campion landfarm site on the former Campion Air Strip.

Photos

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