Building on Lesson Learned for Expanding the Next Phase of the Groundwater Replenishment System

This paper discusses operational information on one of the world's largest indirect potable reuse projects, the Groundwater Replenishment (GWRS). This project includes a large treatment facility known as the Advanced Water Purification Facility (AWPF) and went into service in January 2008. During the first two and a half years of operations numerous issues were identified with the initial plant design. These issues served as “lessons learned” and were able to be addressed in the first planned expansion of the existing facility. The solutions to these issues are discussed in detail and can serve as guidance to other utilities considering implementation of a large scale reclamation facility.