b'ENVIRONMENTALIGM79handling the dross burial, and RosenfeldAfter Eshraghi and his team determined the extent of the tapped environmental and geotechnicalcontamination, they presented a plan to excavate and dispose of engineering consulting company Haley &the toxic dross. Aldrich to assess the challenges it created.The eastern part of the site had a lot ofFunding and Implementing the Fixheaves under the asphalt, says Haley &The city had a strong case for its lawsuit, based on the Comprehensive Aldrich engineer Pejman Eshraghi. Some wereEnvironmental Response, Compensation, and Liability Act of 1980, 4 to 5 feet in diameter and a foot high; somePEJMAN ESHRAGHI which established prohibitions and requirements concerning closed were 40 feet wide and 3 to 4 feet high. There were also cracks inand abandoned hazardous waste sites. the asphaltthousands of them. The city council approved a partial settlement for $52.5 million The firms environmental experts drilled more than 150 borings,in March of 2023, and IGM gave Haley & Aldrich the green light to collecting soil samples to better understand the problem and itsmove forward. The airport and consultant agreed to a project that impact. The project team even developed a new apparatus andwould cost $43 million, with $9 million set aside for continencies. used it in tandem with a method developed by the University ofOver a span of nine months, Haley & Aldrich removed 96,000 Illinois two years earlier to measure and extract gases.tons of toxic material from the dross pit and transported it off-site In the process of creating this heat and the gases, the drossto be disposed of as hazardous waste. Breckenridge describes the also generated hydrogen and ammonia, which are flammable andoperation as a surgical process, with workers excavating up to 20 toxic, Eshraghi explains. This science project should never havefeet deep until no more dross was found. It was like digging out been growing underneath an airport.cancerous cells from under the skin of the airfield pavement. Not surprisingly, the presence of buried dross discouragedTo get the waste out of Arizona, Haley & Aldrich engaged Clean existing and prospective tenants from wanting to spend time orHarbors to transport the material to its hazardous waste disposal money at the airport.facility in Oklahoma.Smarter. ORDERGreener.YOURSMore Affordable. TODAYThe worlds most powerful industrial ZEV& hybrid snow blower is heredeliveringunmatched efficiency and cost savings.60% Lower Cost of Ownership Reduces fuel, maintenance, andoperational expenses.Grant-EligibleEligible for AIP,VALE, & ZEV funding opportunities.Dual-Use PowerActs as aportable power source forpeak shaving, emergencybackup, and microgrids.Eco-FriendlyAchievesustainability goals withzero-emission capabilities.Made in the USA www.kodiaktech.ioAirportImprovement.comMay | June 2025'