First Year Operating the City of Gearhart Oregon Arsenic Removal Membrane Water Treatment Plant

This paper presents the operating and performance results for the first 13 months of operation at the City of Gearhart?s water treatment plant. Membrane hydraulic performance is discussed with respect to the following: ferric chloride dose, variation in plant production due to water rights restrictions, maintenance cleans, and clean-in-place cleans. Arsenic removal results, including any impacts on the ferric chloride and chlorine doses are included. Operation and maintenance lessons learned will also be discussed.