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The scope of work includes the cleaning of 2 digesters at the Fresno/Clovis Regional Wastewater Reclamation Facility (RWRF), this is part of a rotating maintenance program that was established to improve efficiencies. The digesters #1 and #13 (75 foot diameter and 105 foot diameter, respectively) will contain approximately 10 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 digesters, this generally includes but is not limited to screening of pumped digester sludge (capable of removing particles ¼ 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 digesters are emptied, any solids on the digester ceiling, walls, floors and equipment must be water blasted until clean as shown on the plans and specified herein.

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