SCRWTP Lime Softening Improvements - Blend Tank

Collier County is requesting sealed bids on construction of SCRWTP Lime Softening Improvements — Blend Tank (Bid No. 26-8683), with bids due July 1, 2026 at 3:00 PM and a non-mandatory pre-bid meeting on June 9, 2026 at 11:00 AM at the South County Regional Water Treatment Plant, 3851 City Gate Drive, Naples, Florida.

The scope encompasses demolition of the existing chemical blend tank, associated piping, analyzers, and ductile iron piping; construction of a new reinforced concrete blend tank approximately 71 by 45 by 12.55 feet; installation of approximately 180 linear feet of 42-inch and 130 linear feet of 36-inch ductile iron pipe; chemical injection systems for chlorine, caustic, ammonia, and corrosion inhibitor using Schedule 80 CPVC; mechanical slide gates, sampling equipment, and instrumentation including pH analyzers, chlorine residual monitors, level transmitters, temperature sensors, and leak detection systems. Double-wall contained piping with leak detection is mandated for all chemical injection lines. All electrical systems must comply with the National Electrical Code 2020 (NFPA 70), with grounding system resistance not exceeding 10 ohms of dry resistance within 48 hours. All control panels must be constructed by UL 508A-approved vendors bearing UL 508A labels. Work must occur while the facility operates as the county's sole drinking water source, with shutdowns limited to 6:00 PM to 6:00 AM, maximum eight hours per shutdown. The contractor must adhere to the "Five N's" policy prohibiting offsite odors, light emissions, spills, fugitive dust, and noise.

General contractors must demonstrate completion of at least three projects within the past ten years, each with minimum contract value $1,000,000, involving water or wastewater treatment plant work with chemical systems and reinforced concrete structures, with successful retrofit or rehabilitation at operating facilities without excessive disruption, on-time delivery, and within-budget completion. Five project references are required.

The anticipated project budget is $3.29 million. Substantial completion is due within 277 calendar days from Notice to Proceed; final completion within 30 calendar days thereafter. Liquidated damages are $1,782 per calendar day for missed substantial completion. Work hours are 7:00 AM to 7:00 PM, Monday through Friday. A $300,000 owner's allowance is available for unforeseen conditions. General conditions and mobilization are capped at 10 percent of the total bid. Bidders must submit a certified bid bond equal to 5 percent of the total bid amount and provide performance and payment bonds at 100 percent of the contract amount. All bidders must be enrolled in E-Verify and comply with immigration verification requirements.