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Site Report: GCI Girdwood Facility

Site Name: GCI Girdwood Facility
Address: Main Street; Block 2 Lot 23 Girdwood Original Townsite, Girdwood, AK 99587
File Number: 2110.38.015
Hazard ID: 25855
Status: Non-Qualifying
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 60.941750
Longitude: -149.168450
Horizontal Datum:NAD83

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 15 August 2011, GCI utility installation workers encountered petroleum-contaminated soil and shallow groundwater during trenching operations across Lot 23, within Block 2 of Girdwood Original Townsite. The contamination is believed to have resulted from historical releases; it did not result from a spill during excavation activities. The excavated trench was approximately 75 feet long by 2 feet wide by 3 feet deep when GCI notified the Department of the contamination. Analytical results for soil samples collected from the trench sidewalls (approximately 0.5 to 1 foot below ground surface) showed the following contaminants (all in milligrams per kilogram [mg/kg]): diesel range organics (DRO) 34,000; gasoline range organics (GRO) 6,330; residual range organics (RRO) 158; benzene 6.2; toluene 19.9; ethylbenzene 28.3; and total xylenes 376. Analytical results for water samples collected from the trench excavation showed the following contaminants (all in mg/L): GRO 3.6; DRO 3.14; and benzene 0.00803. Low concentrations of toluene, ethylbenzene, and total xylenes were also detected in the samples. Prevention and Emergency Response Program (PERP) staff advised GCI to dispose of contaminated trench spoils. A total of 17.82 tons of petroleum-contaminated soil were transported to Alaska Soil Recycling (ASR) for thermal treatment and disposal. GCI backfilled the lower part of the trench with trench spoils with low heated headspace readings, and the upper part (above the shallow groundwater table) with clean fill. GCI also hydroseeded the area to restore site vegetation. The proposed underground utility line was re-routed to avoid this contaminated area. This site is determined to be a "Duplicate" of Girdwood Townsite Streets file 2110.38.002. This site will be given "Non-Qualifying" status and future reference will be captured in the Girdwood Townsite Streets file 2110.38.002.

Action Information

Action Date Action Description DEC Staff
2/24/2012 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PERP staff Michele Sherwood. Spill no. 11239922701; spill date = 8/15/11; substance = petroleum; quantity = unknown; source = unknown. Mitzi Read
3/22/2012 Site Added to Database A new site has been added to the database Mitzi Read
3/22/2012 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79274 name: Lot 23, Block 2 Petroleum Contamination Mitzi Read
3/28/2012 Potentially Responsible Party/State Interest Letter DEC staff issued letter to Jerry Cochran on March 28, 2012. Todd Blessing
5/25/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79274 Lot 23, Block 2 Petroleum Contamination. Darren Mulkey
5/25/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79274 Lot 23, Block 2 Petroleum Contamination. Darren Mulkey
5/25/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79274 Lot 23, Block 2 Petroleum Contamination. Darren Mulkey
12/2/2016 Update or Other Action After case file review it is determined that this site is a duplicate of Girdwood Townsite Streets file 2110.38.002. Future actions should reference this file Girdwood Townsite Streets 2110.38.002. Darren Mulkey
12/2/2016 Update or Other Action This file will be assigned Non-Qualifying status. Darren Mulkey

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

There are no documents for this site report.

Hazard ID Site Name File Number
2011 Girdwood Townsite Streets 2110.38.002

Missing Location Data

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