HVAC and Roof Replacement at the Sodium Hypochlorite Building

The contract solicitation CP 25-047, issued by the City of Turlock, California’s Municipal Services-Engineering division, seeks bids for the replacement of the HVAC system and flat roof at the Sodium Hypochlorite Building, with an engineer’s estimate of $227,500. The scope includes removal and environmentally compliant disposal of existing equipment, installation of a 7.5-ton Bryant packaged rooftop unit (460-volt, 3-phase, 140K BTU heat with coated coils), and a wall-mounted mini-split unit, along with new roof jacks and curbs for HVAC integration. The flat roof must be replaced using either 60 mil PVC or KEE-Stone FB 60 thermoplastic membrane, with strict delivery, storage, and handling requirements for roofing materials—including use of manufacturer-sealed original packaging, dry elevated storage at least four inches above ground, and temperature limits not exceeding 90°F for PVC. All work must comply with ASTM E108 Class A fire ratings and require certification from Factory Mutual, Underwriters Laboratories, or an approved third-party testing facility. Substitutions of materials require a stamped and sealed professional engineer’s report. The contractor must submit a Critical Path Method (CPM) baseline schedule before field construction, provide 3-week lookahead schedules for progress meetings, and sequence work to ensure substantial completion by the deadline. Roof demolition cannot begin until all new roofing materials are on site, and the existing sheathing must be inspected by city staff before installation proceeds. The award will go to the lowest responsible bidder, determined solely by the base bid excluding any additive alternates, and bidders must provide a bid bond of at least 10% of the total bid amount, along with a Non-Collusion Affidavit, proof of licensure, and compliance with Title 49 CFR Part 26 and state non-discrimination statutes prohibiting bias based on race, color, national origin, or sex. Contractors must also obtain a City of Turlock business license prior to receiving a Notice to Proceed, with an upfront fee of $84 plus half a cent per thousand dollars of project revenue paid semiannually. Progress invoices are due monthly, detailing work accomplished to date, and must be reviewed and approved by the Engineer prior to payment. All submittals are electronic via the Internet-Based Construction Management System, and field quality control requires manufacturer representatives to conduct inspections twice weekly and submit detailed reports, culminating in a final certification