FB-3 Well GAC Treatment South Island Public Service District Engineer: Carollo Status: Completed 2021 Contract: $400K This project consisted of installing a granular activated carbon contactors at the District’s existing well site FB-3. Along with the owner procured GAC contactor, additional work included demolition, paving, grading, fencing, and electrical modifications. The project had a contract duration of 145 days and was successfully completed in early 2021..