Using Advanced Process and 3-Dimensional Modeling For the Design of the Tracy, California WWTF

The City of Tracy's Wastewater Treatment Facility (WWTF) in California is a nine million gallon per day (mgd) facility that operates as a trickling filter/air activated sludge system. The WWTF is located about 60 miles Southeast of San Francisco and discharges secondary effluent into the Sacramento/San Joaquin Delta which provides a source of drinking water for about onethird of California's 30 million population. The City of Tracy is one of the fastest growing cities in the California Central Valley, and similar to other cities and municipalities, it is faced with ever increasing and more stringent NPDES permit conditions.