Built in 1952, Southeast Treatment Plant (SEP) is the SFPUC’s largest wastewater treatment facility. Construction at SEP is underway as part of the Sewer System Improvement Project (SSIP), a more than $2-billion-dollar investment to modernize our aging sewer system. When completed, SEP will use cleaner and greener technologies, generate less odors, and be more resilient against earthquakes and sea-level rise. In compliance with local, state, and federal agencies, crews must minimize construction impact on the environment and surrounding community. These impacts include dust, diesel fumes