The Z&K Team is providing Construction and Project Management Services for this project. The City’s WWTP is currently treating approximately 3.3 million gallons per day (MGD) of the permitted capacity of 4.0 MGD. Per the City’s National Pollutant Discharge Elimination System (NPDES) Permit, once flows at the WWTP reach 75% of the permitted capacity, the City is required to begin the planning, design and funding process to expand the plant. In addition to the need for more capacity to serve the City’s growing customer base, the City is mandated by the Regional Water Quality Control Board (Regional Board) to upgrade its WWTP to meet groundwater basin objectives. The two state-mandated upgrades are total dissolved solids (TDS) and nitrogen reductions. The City of Beaumont’s Wastewater Treatment Plant (WWTP) Expansion/Renovation Project includes will increase the permitted capacity from 4 MGD to 6 MGD. The WWTP’s new treatment processes will be implemented to stay within the plant’s existing property, achieve water quality objectives, and meet build-out flows. To meet the mandated TDS reduction requirements, the City will be implementing a reverse osmosis (RO) process. The pretreatment for the RO system will include two stage screening, grit removal, conventional aeration/biological treatment, and a membrane bioreactor process. The system will continue to utilize UV disinfection.
The City is also constructing a 23-mile pipeline that will connect to the Inland Empire Brine Line (IEBL) in San Bernardino to discharge brine that will be treated at Orange County Sanitation District (OCSD). This project will need to be completed while the current WWTP is in full operation. The IEBL connects to the Orange County Sanitation District’s (OCSD) Santa Ana River Interceptor (SARI) brine pipeline above the Prado Dam and carries brine developed in the Inland Empire to the OCSD’s Plant 1 in Fountain Valley, where the brine will be ultimately treated.