Mitigating environmental impact
The Orange County Health Care Agency and the California Regional Water Quality Control Board required the closure of five underground storage tanks (USTs) at the former Marine Corps Air Station El Toro in Irvine, Calif. Constructed in 1953, these five USTs held 591,426 gallons of jet propulsion fuel and needed to be decommissioned by filling the tanks with an inert solid material in order to achieve regulatory closure concurrence.
Rehabbing aging concrete wastewater infrastructure
As much of the nation’s wastewater and sewer infrastructure approaches the 50- to 100-year mark, it must be rehabilitated to remain in use for a growing population. Yet, municipal wastewater treatment facilities, sewers, and vaults endure some of the most severe and corrosive environments in the water industry and must pass increasing Environmental Protection Agency (EPA) scrutiny.
Evaluating the sustainable performance of infrastructure assets: A flexible and adaptable approach
Several years ago, I put my career on a different track by entering the broad field of sustainability. I wish I could say that after graduating with my master’s degree I consciously chose to work in the area of standards and rating systems — a line of work that seeks to provide a clear, indisputable path toward sustainability — but that line of work found me. And it’s been a terrific ride since.
Large-diameter rehabilitation in Houston
The City of Houston operates and maintains approximately 6,000 miles of gravity sewers with diameters ranging from 6 inches to 144 inches. The average wastewater flow through the system is estimated at 277 million gallons per day (mgd). Depths as great as 80 feet and the city’s extensive urban development make access to these sewers for inspection and repair difficult.
Collaboration on E4 Stockholm Bypass
This SEK 27.6 billion multidiscipline project required the AECOM and ÅF joint venture (JV) to design 18 kilometers of twin tunnels for the Stockholm Bypass, a 21-kilometer motorway linking southern and northern Stockholm, Sweden. Intended to reduce the impacts on sensitive natural and cultural resources, the underground link will be the world’s second longest road tunnels, with their mainline reaching a maximum depth of 100 meters.