ID 581896
Archived
Fresno County
Owner Reference: 3768
Bid Date: 05/04/2021 at 03:00PM
Estimate: $1,800,000
The scope of work includes the dewatering and cleaning, and rehabilitation of two digesters at the Fresno/Clovis Regional Wastewater Reclamation Facility (RWRF). The scope of work for the cleaning is part of a rotating maintenance program that was established to improve efficiencies. Digesters #4 (75 foot diameter) and #11 (105 foot diameter) will contain approximately 13 feet of accumulated solids consisting of sludge, sand and other debris normally found in wastewater digesters. The work under this contract is to furnish any and all necessary labor, materials and equipment for the removal of access hatches and cleaning of the digester, this generally includes but is not limited to screening of pumped digester sludge (capable of removing particles ΒΌ inch and larger), a dewatering process to remove water from the screened sludge resulting in a minimum of 20% bio solids by weight, and transferred to a designated staging area (the fluid separated during dewatering process will be deposited into a plant drain).Then, after the digester is emptied, any solids on the digester ceiling, walls, floors and equipment must be water blasted until clean as shown on the plans and specified in the attached. The scope of work for rehabilitation consists of coating of roof, ceiling, wall surfaces, and structural members in Digesters #4 and #11. The rehabilitation and coating is expected to include, as a minimum, removal of existing coating, removal of existing foam skirt seal, a high pressure water cleaning sufficient to remove all loose concrete and concrete repair, if necessary, with an acid resistant cement or other acceptable product. The corrosion resistant protective coating shall be a spray on elastomeric polyurethane protective coating product. The intent is to allow the Bidder to install a coating system, concrete repair system, top coating, etc. to ensure a 20 year product life when installed in a wastewater environment. All materials shall be suitable for use with ambient air conditions containing H2S in a Wastewater Treatment Plant enclosed environment. Project duration is 210 working days. Questions are due by Apr 27th @ 5:00 PM. Bonds required. Prevailing wages apply.
City of Fresno CA
Sherri Cuadros
(559) 621-1151
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Published 06/01/2021 on Construction Bid Source
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