Client: US Army Corps of Engineers Alaska District
Location: Amaknak, Aleutian Islands, Alaska
Completion Year: 2014
Scope of Work:
- Cover soil and waste sampling
- Surveying of stockpile boundaries
- Cover soil removal
- Stockpile removal
- Site restoration
- Transportation and disposal
Brice performed the removal, transportation and disposal of fuel-contaminated soil left behind on Amaknak Island from three cleanup projects performed previously by others. The contaminated soil was placed in long-term stockpile containment cells at two locations and covered. Due to the harsh winter weather typical of the Aleutian Islands, the stockpile covers required significant maintenance, and were eventually secured with 600 cubic yards of cover soil.
Prior to the removal action, Brice sampled for constituents of concern with results indicating that the soil was below cleanup levels and could be reused. By carefully segregating the cover soil without damaging the liner, prior to the waste load-out and sampling, we reduced disposal costs by approximately $300,000 (by not damaging the liner and exposing the cover soil to contaminants, the cover soil was preserved for reuse, instead of transported out for thermal treatment).
Brice bulk-loaded just over 9,600 tons of fuel-contaminated soil onto two barges for transport to the Columbia Ridge Landfill in Oregon. Additional soil remained after the initial load-out. Due to the unpredictable barging conditions that occur in September/October, the remaining 1,541 tons of soil were containerized in 9 cubic yard Super Sacks, and transferred via barge and rail to Alaska Soil Recycling for thermal treatment. By using the bulk-loading approach, Brice saved over $1M in transportation and disposal costs. In addition, by completing the waste load-out in one field season instead of two field seasons, we avoided winterization costs and another season of mobilization/demobilization costs.