Perris II Desalter Corrosion Repair

The Eastern Municipal Water District is seeking a contractor for the Perris II Desalter Corrosion Repair project located in Menifee, California. The project is designed to address corrosion and leaks in the stainless steel reverse osmosis feed piping caused by microbiologically influenced corrosion, which was found to be resistant to standard disinfection and chemical treatments. The primary objective is to replace the entire reverse osmosis feed assembly with piping specifically resistant to this type of corrosion to ensure the continued production of drinking water from brackish groundwater for the benefit of district ratepayers. The scope of work includes the replacement of the feed assembly, the replacement of three unlined stainless steel cartridge filters, and the installation of a pressure sustaining valve to mitigate excessive vibration in the adjacent reverse osmosis concentrate discharge piping. This project is classified under NAICS code 237110 and is categorized as a forecast with a posted date of July 10, 2026. According to the Notice of Exemption, the project is considered a minor alteration that does not expand the existing use or capacity of the desalter facility and is therefore exempt under status 15301(b).