A RC H I T EC T U R E & E N G I N E E R I N G
Project of the Year Nominees
40 | February 2022
Ahtna Engineering Services Source and Incidental Contaminate CON/HTRW Remedial Action, Davis AFB Cantonment Area
A
htna Engineering Services successfully completed a Containerized Hazardous, Toxic, or Radioactive Waste removal action (RmA) and limited site investigation at Davis Air Force Base Cantonment Area FUDS during the 2019 and 2020 field seasons. The project was located on the remote western side of Adak Island within the Alaska Maritime Wildlife Refuge, and access was limited to only helicopters and boats. Boat access was constrained to roughly 30 feet of usable beach influenced by strong winds and rip tides. On-site conditions were very poor, with no available roads and extremely soft soil that would not support wheeled vehicles of any type. The RmA included the removal of two above ground storage tanks (AST); 8.18 tons of drums and drum carcasses; 4,054 tons of soil contaminated by petroleum, oil, and lubricant (POL); 445 gallons of POL-liquid contents from drums and ASTs; 0.55 tons of broken lead-acid battery debris and lead-shielded cable; 11.1 tons of lead-contaminated soil; 21.6 tons of cadmium contaminated soil; 0.26 tons of electronics debris; 525 linear feet of pipeline; and two generators from the site. Ahtna successfully completed the work through careful planning efforts, gaining access using landing craft and helicopters and the extensive use of tracked heavy equipment and crane mats to minimize ground impacts. Though the COVID-19 pandemic struck just prior to the 2020 field season, Ahtna completed the work and demobilized successfully using a rigorous safety, testing, and monitoring program; remote camp; and limited vessel uses.
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