Bakersfield Planet bids #147138

Engineering design and construction-phase services for Bakersfield wastewater treatment plant improvements

The City of Bakersfield is seeking engineering consultants to design and support major improvements at its two wastewater treatment plants. - Buyer: City of Bakersfield, Water Department, Wastewater Division. - Opportunity: Phase 0 design and construction-phase engineering services for Wastewater Treatment Plants No. 2 and No. 3. - Plant 2 is an existing 25-million-gallon-per-day trickling-filter facility targeted for stabilization and rehabilitation. - Plant 3 improvements address its permitted capacity of 32 million gallons per day, including aeration, diffuser, digester-gas-flare, and odor-control work. - Services requested: Project management, preliminary design reports, detailed designs, plans and specifications, equipment documentation, cost estimates, bidding support, construction observation and consulting, submittal and shop-drawing review, change-order support, and record drawings. Design submissions are planned at 30%, 60%, 90%, and 100% stages. - Major Plant 2 scope: New influent pump station, two stacked-tray units, classifier structure, scum pump station, CEPT for primary clarifiers, rehabilitation of three trickling filters, 12 forced-air fans, two rotary drum thickeners, Digester No. 1 rehabilitation, a digester gas flare, a thickening building, electrical and instrumentation replacement, and new administrative, shop, and warehouse buildings. - Major Plant 3 scope: Air piping, submersible mixers, and instrumentation for four aeration basins; replacement of approximately 20,000 nine-inch disc diffusers across ten basins, with all diffusers matching for even air distribution; a digester gas flare sized for 45 MGD with 3:1 turndown; a bio-trickling filter odor-control system; and a headworks ventilation system. - Notable requirements: The consultant team must include a California-registered civil engineer with wastewater-treatment experience. Flares must meet applicable California air-quality requirements for ultra-low NOx, and the scope calls for H2S removal; SulfaTreat is cited as an example H2S-removal solution. No equipment OEMs or specific equipment part numbers are specified. - Potential award structure: The City may make one or two consulting agreements, and firms may propose for either plant or both.

Description

The City of Bakersfield is seeking qualifications and proposals from engineering firms to design improvements to Wastewater Treatment Plants No. 2 and No. 3. The work includes stabilizing and rehabilitating Plant 2’s existing 25 MGD facility and rehabilitating and installing equipment at Plant 3 to treat its permitted 32 MGD capacity. The selected firm or firms will provide preliminary design reports, full design, and engineering services through bidding and construction. The City may award one or two agreements.

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