RFP 26-139 - Wastewater Treatment Plant & Recycled Water Upgrades

City of Banning - Purchasing Division has issued request for proposal, solicitation RFP-26-139.

The City of Banning (City) is soliciting proposals from qualified engineering consulting firms to provide professional engineering design, permitting support, bidding assistance, and optional engineering services during construction for the phased modernization and expansion of the City's Wastewater Treatment Plant (WWTP) and recycled water facilities. The selected Consultant shall provide a multidisciplinary team capable of delivering a complete set of Plans, Specifications, and Estimates (PS&E) suitable for public bidding while supporting the City's funding, regulatory, and operational objectives.

The City owns and operates a WWTP located at 2242 East Charles Street, Banning, California 92220. The WWTP has a design treatment capacity of 3.6 million gallons per day (MGD) and currently discharges approximately 2.1 MGD into 10 unlined evaporation/percolation ponds. The treated effluent then percolates into the groundwater of the San Gorgonio Hydrologic Unit. Groundwater from this basin is used for municipal, industrial, and agricultural applications. The WWTP consists of preliminary treatment, primary treatment, secondary treatment (trickling filters), solids handling, disinfection (currently not in use), and evaporation/percolation ponds. The City’s end goal is to select and construct a treatment alternative for the removal of nitrogen and the production of Title 22 recycled water that is the best fit for the City’s current and future goals. The City's existing WWTP requires significant upgrades to meet the regional water quality control board’s impending effluent water quality standards, increase capacity to approximately 4.8 million gallons per day (MGD), produce Title 22 tertiary recycled water, and position the facility for future reverse osmosis (RO) and brine management improvements. The City has previously completed planning studies, basis of design, preliminary engineering, surveying, geotechnical investigations, and other technical work that will be made available to the successful Consultant.

Responses are due September 25, 2026 at 4:00 PM PDT.

Questions must be submitted by September 15, 2026 at 12:00 PM PDT.

A mandatory pre-proposal conference is scheduled for August 17, 2026 at 10:00 AM PDT at City Hall 99 E. Ramsey St Banning CA 92220.

Commodity categories: Engineering Software; Disinfectants, Wastewater; C.I.P., Architectural/Engineering Services; Construction and Upgrades, Wastewater Treatment Plant; Engineering Consulting; Engineering Services, Professional; Civil Engineering; Engineering Services (Not Otherwise Classified).

Contact: Ellen Clifford, Purchasing Manager (eclifford@banningca.gov, (951) 922-3121).

3 documents are attached to the notice: Grant Agreement R25AP00588 ISSUED; Previous Draft Basis-of-Design Report - For refrence purposes only; AGREEMENT FOR PROFESSIONAL SERVICES - Sample Draft.

The full solicitation document, addenda and the question-and-answer thread are on the agency's OpenGov portal at https://procurement.opengov.com/portal/banning-ca/projects/289525. Responses are submitted electronically there, and a free vendor account is required before you can upload one.